Multimedia signal two-way transmission device and system

Abstract

The invention discloses a multimedia signal two-way transmission device and system. The device comprises a first power supply module, a multimedia signal transmission module and a configuration parameter transmission module, and each of the three modules comprises two sub-modules. When the first power supply sub-module is used as output, the first configuration parameter transmission sub-module transmits configuration parameters from the HDMI interface to the terminal equipment, and the first multimedia signal transmission sub-module transmits multimedia data configured by the terminal equipment according to the parameters to the HDMI interface under the power supply of the first power supply sub-module; when the first power supply sub-module is used as input, the second configuration parameter transmission sub-module transmits configuration parameters from the terminal equipment to the HDMI interface, the second multimedia signal transmission sub-module transmits multimedia data from the HDMI interface to the terminal equipment under the power supply of the second power supply sub-module, and the data is obtained according to the configuration of the second configuration parameters. The technical problem that a traditional HDMI interface can only realize one-way signal transmission but cannot be compatible with an input function or an output function at the same time is solved.

Description

Technical Field

[0001] The present application relates to the technical field of data transmission, and in particular to a device and system for bidirectional transmission of multimedia signals. Background Art

[0002] HDMI (High Dedinition Multimedia Interface) is a widely used audio and video interface standard that can send high-quality, high-bandwidth multimedia content. It allows devices to transmit video and audio signals through a single cable, greatly simplifying the connection of multimedia systems. However, an obvious limitation in the design of the HDMI interface is that its signal transmission direction is usually fixed, that is, each interface is either used as an output end (source device), such as a cloud computer terminal outputting signals to a monitor or TV, or as an input end (receiving device), such as a monitor receiving signals from a cloud computer terminal. For example, the HDMI standard mainly includes versions 1.0, 1.1, 1.2, 1.3, 1.4, 2.0, etc. Although the bandwidth and resolution support have been improved, the limitation of its signal transmission direction still exists.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present application provide a multimedia signal bidirectional transmission device and system to at least solve the technical problem that the traditional HDMI interface can only realize one-way signal transmission but cannot be compatible with both input and output functions at the same time.

[0005] According to one aspect of an embodiment of the present application, a multimedia signal bidirectional transmission device is provided, comprising: a first power supply module, a multimedia signal transmission module and a configuration parameter transmission module, wherein the first power supply module comprises a first power supply submodule and a second power supply submodule, the multimedia signal transmission module comprises a first multimedia signal transmission submodule and a second multimedia signal transmission submodule, and the configuration parameter transmission module comprises a first configuration parameter transmission submodule and a second configuration parameter transmission submodule; when a target control signal input to the multimedia signal bidirectional transmission device is in a first level state, the first power supply submodule is used to power the first multimedia signal transmission submodule; the first configuration parameter transmission submodule is used to transmit a first configuration parameter from an HDMI interface module to a terminal device; the first multimedia signal transmission submodule is used to transmit first multimedia data configured by the terminal device according to the first configuration parameter to the HDMI interface module; when the target control signal input to the multimedia signal bidirectional transmission device is in a second level state, the second power supply submodule is used to power the second multimedia signal transmission submodule; the second configuration parameter transmission submodule is used to transmit a second configuration parameter from the terminal device to the HDMI interface module; the second multimedia signal transmission submodule is used to transmit a second multimedia data from the HDMI interface module to the terminal device, wherein the second multimedia data is obtained according to the second configuration parameter configuration.

[0006] Optionally, the first power supply submodule includes: a first power supply module, a first voltage control chip, a first voltage stabilizing module, a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, and the first voltage control chip includes: a first enable pin, a first input pin, a first signal pin, a first ground pin and a first output pin, wherein the target control signal inputs the first enable pin, the first enable pin is connected to the first end of the first resistor, the first input pin is respectively connected to the positive electrode of the first capacitor and the first power supply module, the first signal pin is connected to the first end of the second resistor, the first ground pin is grounded, the first output pin is respectively connected to the positive electrode of the second capacitor, the positive electrode of the third capacitor, the first multimedia signal transmission submodule and the first voltage stabilizing module, the second end of the first resistor is connected to the first power supply module, the negative electrode of the first capacitor is grounded, the second end of the second resistor is connected to the first power supply module, the negative electrode of the second capacitor is grounded, and the negative electrode of the third capacitor is grounded; the second power supply submodule includes: a second power supply module, a first transistor, A second voltage control chip, a second voltage stabilizing module, a third resistor, a fourth resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor, wherein the target control signal is input into the base of the first triode, the emitter of the first triode is grounded, and the collector of the first triode is connected to the second voltage control chip. The second voltage control chip includes: a second enable pin, a second input pin, a second signal pin, a second ground pin and a second output pin. The second enable pin is respectively connected to the first end of the third resistor and the collector of the first triode, the second input pin is respectively connected to the positive electrode of the fourth capacitor and the second power supply module, the second signal pin is connected to the first end of the fourth resistor, the second ground pin is grounded, the second output pin is respectively connected to the positive electrode of the fifth capacitor, the positive electrode of the sixth capacitor, the second multimedia signal transmission submodule and the second voltage stabilizing module, the second end of the third resistor is connected to the second power supply module, the negative electrode of the fourth capacitor is grounded, the second end of the fourth resistor is connected to the second power supply module, the negative electrode of the fifth capacitor is grounded, and the negative electrode of the sixth capacitor is grounded.

[0007] Optionally, the first voltage stabilizing module includes: multiple seventh capacitors, wherein the positive electrodes of all the seventh capacitors are connected to the first output pin, and the negative electrodes of all the seventh capacitors are grounded; the second voltage stabilizing module includes: multiple eighth capacitors, wherein the positive electrodes of all the eighth capacitors are connected to the second output pin, and the negative electrodes of all the eighth capacitors are grounded.

[0008] Optionally, the first multimedia signal transmission submodule includes: a first conversion chip, a fifth resistor and a sixth resistor, wherein the first conversion chip includes: a plurality of first power pins, a first protection pin, a second protection pin, three pairs of first data input pins, three pairs of first data output pins, a pair of first clock input pins, and a pair of first clock output pins, the plurality of first power pins are connected to the first output pin, the first protection pin is connected to the first end of the fifth resistor, the second protection pin is connected to the first end of the sixth resistor, the second end of the fifth resistor is grounded, the second end of the sixth resistor is grounded, the first data input pin and the first clock input pin are both connected to the terminal device, and the first data output pin and the first clock output pin are both connected to the HDMI interface module; the second multimedia signal transmission submodule includes: a second conversion chip, wherein the second conversion chip includes: a plurality of second power pins, three pairs of second data input pins, three pairs of second data output pins, a pair of second clock input pins, and a pair of second clock output pins, the plurality of second power pins are connected to the second output pin, the second data input pin and the second clock input pin are both connected to the HDMI interface module, and the second data output pin and the second clock output pin are both connected to the terminal device.

[0009] Optionally, the first configuration parameter transmission submodule includes: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first MOS transistor and a second MOS transistor, and the second configuration parameter transmission submodule includes: an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a third MOS transistor and a fourth MOS transistor, wherein:

[0010] The target control signal is input to the gate of the first MOS tube, the source of the first MOS tube is respectively connected to the first end of the seventh resistor and the terminal device, the drain of the first MOS tube is respectively connected to the first end of the eighth resistor and the HDMI interface module, the second end of the seventh resistor is connected to the third power supply module, and the second end of the eighth resistor is connected to the fourth power supply module; the target control signal is input to the gate of the second MOS tube, the source of the second MOS tube is respectively connected to the first end of the ninth resistor and the terminal device, the drain of the second MOS tube is respectively connected to the first end of the tenth resistor and the HDMI interface module, the second end of the ninth resistor is connected to the third power supply module, and the second end of the tenth resistor is connected to the fourth power supply module; the source of the third MOS tube is connected to the first end of the HDMI interface module, the second end of the ninth resistor is connected to the third power supply module, and the second end of the tenth resistor is connected to the fourth power supply module; The gate of the third MOS tube is connected to the collector of the first triode; the source of the fourth MOS tube is connected to the first end of the thirteenth resistor and the terminal device respectively, the drain of the fourth MOS tube is connected to the first end of the fourteenth resistor and the HDMI interface module respectively, the second end of the thirteenth resistor is connected to the third power supply module, the second end of the fourteenth resistor is connected to the fourth power supply module, and the gate of the fourth MOS tube is connected to the collector of the first triode; the source of the fourth MOS tube is connected to the first end of the thirteenth resistor and the terminal device respectively, the drain of the fourth MOS tube is connected to the first end of the fourteenth resistor and the HDMI interface module respectively, the second end of the thirteenth resistor is connected to the third power supply module, the second end of the fourteenth resistor is connected to the fourth power supply module, and the gate of the fourth MOS tube is connected to the collector of the first triode.

[0011] Optionally, the device further includes: a second power supply module, configured to supply power to the outside through the HDMI interface module when the target control signal input to the multimedia signal bidirectional transmission device is in a first level state.

[0012] Optionally, the second power supply module includes: a fifth power supply module, a third voltage control chip, a fifteenth resistor and a sixteenth resistor, wherein the third voltage control chip includes: a third enable pin, a third input pin, a third signal pin, a third ground pin and a third output pin, the target control signal is input to the third enable pin, the third input pin is connected to the fifth power supply module, the third signal pin is connected to the first end of the fifteenth resistor, the third ground pin is grounded, the third output pin is respectively connected to the first end of the sixteenth resistor and the HDMI interface module, the second end of the sixteenth resistor is grounded, and the second end of the fifteenth resistor is connected to the fifth power supply module.

[0013] Optionally, the device also includes: a hot plug detection signal transmission module, which is used to transmit the hot plug signal from the HDMI interface module to the terminal device when the target control signal of the input multimedia signal bidirectional transmission device is in a first level state, and transmit the hot plug signal from the terminal device to the HDMI interface module when the target control signal of the input multimedia signal bidirectional transmission device is in a second level state.

[0014] Optionally, the hot plug detection signal transmission module includes: a fifth MOS tube, a sixth MOS tube and a seventeenth resistor, wherein the target control signal is input into the gate of the fifth MOS tube, the source of the fifth MOS tube is connected to the terminal device, the gate of the sixth MOS tube is connected to the second power supply submodule, the drain of the sixth MOS tube is respectively connected to the first end of the seventeenth resistor and the terminal device, the drain of the fifth MOS tube and the source of the sixth MOS tube are respectively connected to the HDMI interface module, and the second end of the seventeenth resistor is connected to the third output pin.

[0015] According to another aspect of an embodiment of the present application, a multimedia signal bidirectional transmission system is also provided, comprising: a terminal device, a multimedia signal bidirectional transmission device according to any one of claims 1 to 9, and an HDMI interface module.

[0016] Optionally, the multimedia signal bidirectional transmission device further includes: a second power supply module and a hot plug detection signal transmission module; the terminal device includes: a first chip for configuring the first multimedia data and a second chip for receiving the second multimedia data; the HDMI interface module includes: a sixth power supply module and an HDMI interface; the first multimedia signal transmission submodule includes: a first conversion chip; the second multimedia signal transmission submodule includes: a second conversion chip; the first power supply submodule includes: a first voltage control chip; the second power supply submodule includes: a second voltage control chip; the first configuration parameter transmission submodule includes: a first MOS tube and a second MOS tube; the second configuration parameter transmission submodule includes: a third MOS tube and a fourth MOS tube; the second power supply module includes: a third voltage control chip; The hot-plug detection signal transmission module includes: a fifth MOS tube, a sixth MOS tube and a seventeenth resistor; the first chip is respectively connected to the first conversion chip, the source of the first MOS tube, the source of the second MOS tube, the source of the fifth MOS tube and the first voltage control chip, and the first conversion chip is respectively connected to the HDMI interface and the first voltage control chip; the second chip is respectively connected to the second conversion chip, the source of the third MOS tube, the source of the fourth MOS tube and the drain of the sixth MOS tube, and the second conversion chip is respectively connected to the HDMI interface and the second voltage control chip; the HDMI interface is respectively connected to the third voltage control chip, the drain of the first MOS tube, the drain of the second MOS tube, the drain of the fifth MOS tube, the drain of the third MOS tube, the drain of the fourth MOS tube and the source of the sixth MOS tube.

[0017] Optionally, the first chip includes: three pairs of third data output pins, a pair of third clock output pins, a first control pin, a first serial clock pin, a first serial data pin, and a first hot plug detection signal pin; the second chip includes: three pairs of third data input pins, a pair of third clock input pins, a second serial clock pin, a second serial data pin, and a second hot plug detection signal pin; the first conversion chip includes: three pairs of first data input pins and a pair of first clock input pins; the second conversion chip includes: three pairs of second data output pins and a pair of second clock input pins; each pair of third data output pins is connected to a pair of first data input pins through a pair of ninth capacitors, and a pair of third clock output pins is connected to a pair of first data input pins through a pair of ninth capacitors. The pins are connected to a pair of first clock input pins through a pair of tenth capacitors, the first control pin is connected to the first output pin of the first voltage control chip through an eighteenth resistor, the first serial clock pin is connected to the source of the first MOS tube, the first serial data pin is connected to the source of the second MOS tube, and the first hot plug detection signal pin is connected to the source of the fifth MOS tube; each pair of third data input pins is connected to a pair of first data output pins, a pair of third clock input pins is connected to a pair of first clock output pins, the second serial clock pin is connected to the source of the third MOS tube, the second serial data pin is connected to the source of the fourth MOS tube, and the second hot plug detection signal pin is connected to the drain of the sixth MOS tube.

[0018] The HDMI interface includes: three pairs of data signal pins, a pair of clock signal pins, a third serial clock pin, a third serial data pin, a third hot plug detection signal pin, a third power pin and a plurality of ground pins; the first conversion chip includes: three pairs of first data output pins, a pair of first clock output pins; the second conversion chip includes: three pairs of second data input pins, a pair of second clock input pins; each pair of first data output pins is connected to a pair of data signal pins through a pair of nineteenth resistors, a pair of first clock output pins is connected to a pair of clock signal pins through a pair of twentieth resistors, each pair of second data input pins is connected to a pair of data signal pins, and a pair of second clock input pins is connected to a pair of data signal pins. A pair of clock signal pins are connected, a third serial clock pin is respectively connected to the drain of the first MOS tube, the drain of the third MOS tube and the first end of the twenty-first resistor, a third serial data pin is respectively connected to the drain of the second MOS tube, the drain of the fourth MOS tube and the first end of the twenty-second resistor, a third hot-plug detection signal pin is respectively connected to the drain of the fifth MOS tube and the source of the sixth MOS tube, a third power supply pin is connected to the third output pin of the third voltage control chip, the third power supply pin is also connected to the drain of the sixth MOS tube through the seventeenth resistor, a plurality of grounding pins are grounded, and the second end of the twenty-first resistor and the second end of the twenty-second resistor are respectively connected to the sixth power supply module.

[0019] In an embodiment of the present application, a multimedia signal bidirectional transmission device includes: a first power supply module, a multimedia signal transmission module and a configuration parameter transmission module, wherein the first power supply module includes a first power supply submodule and a second power supply submodule, the multimedia signal transmission module includes a first multimedia signal transmission submodule and a second multimedia signal transmission submodule, and the configuration parameter transmission module includes a first configuration parameter transmission submodule and a second configuration parameter transmission submodule; when the target control signal input to the multimedia signal bidirectional transmission device is in a first level state, the first power supply submodule is used to power the first multimedia signal transmission submodule; the first configuration parameter transmission submodule is used to transmit the first configuration parameter from the HDMI interface module to the terminal device; the first multimedia signal transmission submodule is used to transmit the first multimedia data configured by the terminal device according to the first configuration parameter to the HDMI interface module; when the target control signal input to the multimedia signal bidirectional transmission device is in a second level state, the second power supply submodule is used to power the second multimedia signal transmission submodule; the second configuration parameter transmission submodule is used to transmit the second configuration parameter from the terminal device to the HDMI interface module; the second multimedia signal transmission submodule is used to transmit the second multimedia data from the HDMI interface module to the terminal device, wherein the second multimedia data is obtained according to the second configuration parameter configuration. Through this device, when the HDMI interface module needs to be used as an output, the first multimedia signal transmission submodule is activated to transmit data from the terminal device to the HDMI interface module, and when the HDMI interface module needs to be used as an input, the second multimedia signal transmission submodule is activated to transmit data from the HDMI interface module to the terminal device, thereby solving the technical problem that the traditional HDMI interface can only realize one-way signal transmission but cannot be compatible with both input and output functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a schematic structural diagram of an optional multimedia signal bidirectional transmission device according to an embodiment of the present application;

[0022] Figure 2 is a circuit connection diagram of an optional first power submodule according to an embodiment of the present application;

[0023] Figure 3 is a circuit connection diagram of an optional second power submodule according to an embodiment of the present application;

[0024] Figure 4is a circuit connection diagram of an optional configuration parameter transmission module according to an embodiment of the present application;

[0025] Figure 5 is a circuit connection diagram of an optional second power supply module according to an embodiment of the present application;

[0026] Figure 6 is a circuit connection diagram of an optional hot-swap detection signal transmission module according to an embodiment of the present application;

[0027] Figure 7 It is a schematic diagram of the overall structure of an optional terminal device, a multimedia signal bidirectional transmission device and an HDMI interface module according to an embodiment of the present application;

[0028] Figure 8 is a schematic diagram of circuit connections between an optional terminal device and a first multimedia signal transmission submodule according to an embodiment of the present application;

[0029] Fig. 9 is a circuit connection diagram of an optional terminal device and a second multimedia signal transmission submodule according to an embodiment of the present application;

[0030] Fig.10 This is a circuit connection diagram of an optional multimedia signal transmission module and an HDMI interface module according to an embodiment of the present application.

[0031] Fig.11 It is a structural diagram of an optional multimedia signal bidirectional transmission system according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, device, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, devices, products or equipment.

[0034] Example 1

[0035] According to an embodiment of the present application, a bidirectional transmission device for multimedia signals is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0036] According to an embodiment of the present application, a multimedia signal bidirectional transmission device is first provided, such as Figure 1 As shown, the device at least includes: a first power module 11, a multimedia signal transmission module 12, and a configuration parameter transmission module 13. The first power module 12 includes: a first power submodule 111 and a second power submodule 112. The multimedia signal transmission module 12 includes: a first multimedia signal transmission submodule 121 and a second multimedia signal transmission submodule 122. The configuration parameter transmission module 13 includes: a first configuration parameter transmission submodule 131 and a second configuration parameter transmission submodule 132.

[0037] When the target control signal of the input multimedia signal bidirectional transmission device is in the first level state, the first power supply submodule 111 is used to power the first multimedia signal transmission submodule 121; the first configuration parameter transmission submodule 131 is used to transmit the first configuration parameter from the HDMI interface module to the terminal device; the first multimedia signal transmission submodule 121 is used to transmit the first multimedia data configured by the terminal device according to the first configuration parameter to the HDMI interface module; when the target control signal of the input multimedia signal bidirectional transmission device is in the second level state, the second power supply submodule 112 is used to power the second multimedia signal transmission submodule 122; the second configuration parameter transmission submodule 132 is used to transmit the second configuration parameter from the terminal device to the HDMI interface module; the second multimedia signal transmission submodule 122 is used to transmit the second multimedia data from the HDMI interface module to the terminal device, wherein the second multimedia data is obtained according to the second configuration parameter configuration.

[0038] The following describes various steps of the multimedia signal bidirectional transmission device in conjunction with a specific implementation process.

[0039] Figures 2 to 4 Given Figure 1 The specific circuit diagram of the components in the bidirectional transmission device is shown in FIG. The circuit working modes of the components of the system are described in turn as follows:

[0040] Figure 2 A schematic diagram of actual circuit connection of the first power submodule in an embodiment of the present application is given, such as Figure 2 As shown, the first power submodule includes: a first power supply module +3V3_Sys, a first voltage control chip U103, a first voltage stabilizing module, a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, and the first voltage control chip U103 includes: a first enable pin EN, a first input pin IN, a first signal pin FLG, a first ground pin GND and a first output pin OUT, wherein the target control signal IN_OUT_SW is input to the first enable pin EN, the first enable pin EN is connected to the first end of the first resistor R144, and the first input pin IN is respectively connected to the positive electrode and the positive electrode of the first capacitor C113 The first power supply module is connected to +3V3_Sys, the first signal pin FLG is connected to the first end of the second resistor R145, the first ground pin GND is grounded, the first output pin OUT is respectively connected to the positive electrode of the second capacitor C114, the positive electrode of the third capacitor C115, the first multimedia signal transmission submodule and the first voltage stabilizing module, the second end of the first resistor R144 is connected to the first power supply module +3V3_Sys, the negative electrode of the first capacitor C113 is grounded, the second end of the second resistor R145 is connected to the first power supply module +3V3_Sys, the negative electrode of the second capacitor C114 is grounded, and the negative electrode of the third capacitor C115 is grounded.

[0041] exist Figure 2 In the embodiment, the first voltage stabilizing module includes: a plurality of seventh capacitors, the plurality of seventh capacitors include: capacitor C101, capacitor C102, capacitor C103, capacitor C104, capacitor C105, capacitor C106, capacitor C107, capacitor C128, capacitor C129, capacitor C130 and capacitor C131, wherein the positive electrodes of all the capacitors are connected to the first output pin OUT of the first voltage control chip U103, and the negative electrodes of all the capacitors are grounded.

[0042] like Figure 2 As shown, the target control signal IN_OUT_SW is input to the first input pin of U103 as an enable signal. When the enable signal is at a high level, U103 is activated and starts to output the second target voltage +3V3_OUT through its first output pin OUT. The +3V3_OUT voltage is further stabilized and adjusted by the first voltage stabilizing module to ensure that the provided voltage can meet the normal working requirements of the first multimedia signal transmission submodule. The stabilized +3V3_OUT voltage is transmitted to the first multimedia signal transmission submodule to provide the necessary power for the module, so that the first multimedia signal transmission submodule can transmit the first multimedia data from the terminal device to the HDMI interface module, and the HDMI interface module transmits the first multimedia data to the external receiving device. It should be noted that the external receiving device may only have a receiving function.

[0043] Figure 3 A schematic diagram of the actual circuit connection of the second power submodule in the embodiment of the present application is given, such as Figure 3As shown, the second power supply submodule includes: a second power supply module +3V3_Sys, a first transistor Q104, a second voltage control chip U159, a second voltage stabilizing module, a third resistor R621, a fourth resistor R622, a fourth capacitor C683, a fifth capacitor C684 and a sixth capacitor C682, wherein the target control signal is input to the base 1 of the first transistor Q104, the emitter 2 of the first transistor Q104 is grounded, and the collector 3 of the first transistor Q104 is connected to the second voltage control chip U159. The second voltage control chip U159 includes: a second enable pin EN, a second input pin IN, a second signal pin FLG, a second ground pin GND and a second output pin OUT, and the second enable pin EN is respectively connected to the third resistor R621 The first end of the first transistor Q104 is connected to the collector 3, the second input pin IN is respectively connected to the positive electrode of the fourth capacitor C683 and the second power supply module +3V3_Sys, the second signal pin FLG is connected to the first end of the fourth resistor R622, the second ground pin GND is grounded, the second output pin OUT is respectively connected to the positive electrode of the fifth capacitor C684, the positive electrode of the sixth capacitor C682, the second multimedia signal transmission submodule and the second voltage stabilizing module, the second end of the third resistor R621 is connected to the second power supply module +3V3_Sys, the negative electrode of the fourth capacitor C683 is grounded, the second end of the fourth resistor R622 is connected to the second power supply module +3V3_Sys, the negative electrode of the fifth capacitor C684 is grounded, and the negative electrode of the sixth capacitor C682 is grounded.

[0044] exist Figure 3 In the second voltage stabilization module, the multiple eighth capacitors include: capacitor C685, capacitor C686, capacitor C687, capacitor C688, capacitor C689, capacitor C690, capacitor C691, capacitor C692, capacitor C693, capacitor C694 and capacitor C695, wherein the positive electrodes of all capacitors are connected to the second output pin of the second voltage control chip U159, and the negative electrodes of all capacitors are grounded.

[0045] When the target control signal IN_OUT_SW is a preset high level, the base of Q104 receives a high level, and the level of the collector (pin 3) is a preset low level, that is, the state of the IN_OUT_SW_N signal generated by the collector is a low level. At this time, the device is in output mode. When the target control signal IN_OUT_SW is changed to a preset low level, the base level of Q104 decreases. At this time, the collector level of Q104 is a preset high level, that is, the IN_OUT_SW_N signal is pulled up to a preset high level state, which indicates that the device has switched to input mode.

[0046] The IN_OUT_SW_N signal is input to the second input pin of U105 as an enable signal. When the enable signal is at a high level, U105 is activated and starts to output the second target voltage +3V3_INPUT through its second output pin OUT. The +3V3_INPUT voltage is further stabilized and adjusted by the second voltage stabilization module to ensure that the provided voltage can meet the normal working requirements of the second multimedia signal transmission submodule. The stabilized +3V3_INPUT voltage is transmitted to the second multimedia signal transmission submodule to provide the necessary power for the module, so that the second multimedia signal transmission submodule receives the second multimedia data from the HDMI interface module and transmits the data to the terminal device.

[0047] Figure 4 A schematic diagram of the actual circuit connection of the configuration parameter transmission module of the embodiment of the present application is given. Figure 4 As shown, the first configuration parameter transmission submodule includes: a seventh resistor R133, an eighth resistor R101, a ninth resistor R132, a tenth resistor R102, a first MOS tube Q103A, and a second MOS tube Q103B, and the second configuration parameter transmission submodule includes: an eleventh resistor R149, a twelfth resistor R150, a thirteenth resistor R148, a fourteenth resistor R151, a third MOS tube Q105A and a fourth MOS tube 105B.

[0048] exist Figure 4 In the embodiment, the target control signal IN_OUT_SW is input to the gate G1 of the first MOS tube Q103A, the source S1 of the first MOS tube Q103A is respectively connected to the first end of the seventh resistor R133 and the terminal device, the drain D1 of the first MOS tube Q103A is respectively connected to the first end of the eighth resistor R101 and the HDMI interface module, the second end of the seventh resistor R133 is connected to the third power supply module +3V3_system, and the second end of the eighth resistor R101 is connected to the fourth power supply module +5V_USB; the source S2 of the second MOS tube Q103B is respectively connected to the first end of the ninth resistor R132 and the terminal device, the drain D1 of the second MOS tube Q103B is respectively connected to the first end of the tenth resistor R102 and the HDMI interface module, the second end of the ninth resistor R132 is connected to the third power supply module +3V3_system, and the second end of the tenth resistor R102 is connected to the fourth power supply module +5V_USB, and the target control signal IN_OUT_SW is input to the gate G2 of the second MOS tube Q103B.

[0049] exist Figure 4In the embodiment, the source S1 of the third MOS tube Q105A is respectively connected to the first end of the eleventh resistor R149 and the terminal device, the drain D1 of the third MOS tube Q105A is respectively connected to the first end of the twelfth resistor R150 and the HDMI interface module, the second end of the eleventh resistor R149 is connected to the third power supply module +3V3_system, the second end of the twelfth resistor R150 is connected to the fourth power supply module +5V_USB, and the gate G1 of the third MOS tube Q105A is connected to the collector 3 of the first triode Q104 in the second power supply submodule, that is, receives the IN_OUT_SW_N control signal at the collector. The source S2 of the fourth MOS tube Q105B is respectively connected to the first end of the thirteenth resistor R148 and the terminal device, the drain D1 of the fourth MOS tube Q105B is respectively connected to the first end of the fourteenth resistor R151 and the HDMI interface module, the second end of the thirteenth resistor R148 is connected to the third power supply module +3V3_system, the second end of the fourteenth resistor R151 is connected to the fourth power supply module +5V_USB, and the gate G2 of the fourth MOS tube Q105B is connected to the collector 3 of the first transistor Q104 in the second power supply submodule, that is, receives the IN_OUT_SW_N control signal at the collector.

[0050] When the target control signal IN_OUT_SW is in a preset high level state (usually logic 1 or VCC), the first gate and the second gate of the first MOS tube and the second MOS tube in the configuration parameter transmission module receive this level, which will control the conduction state of the MOS tube, so that the configuration parameters can be transmitted from the HDMI interface module to the terminal device. The function of the configuration parameter transmission module is to transmit the configuration parameters (first configuration parameters) of the HDMI interface module to the terminal device. These parameters may include resolution, refresh rate, color depth, etc. The terminal device will configure the first multimedia data to be transmitted according to the received first configuration parameters to ensure that the data format matches the receiving capability of the external receiving device.

[0051] On the contrary, when the target control signal IN_OUT_SW is in a preset low level state (usually logic 0 or GND) and IN_OUT_SW_N is in a preset high level state, the configuration parameter transmission direction is opposite, that is, the terminal device transmits the configuration parameters to the HDMI interface module, the configuration parameter transmission module transmits the configuration parameters of the terminal device (second configuration parameters) to the HDMI interface module, and the HDMI interface module transmits them to the external device (for example, another computer or game console), and the external device adjusts the multimedia data to be transmitted according to the second configuration parameters to ensure that the data can be correctly parsed and displayed by the terminal device.

[0052] It should be noted that the configuration parameter transmission module follows the I2C (Inter-Integrated Circuit) communication protocol for data transmission. The SCL clock signal sends serial clock pulses through the serial clock line SCL to synchronize the transmission of serial data. In the I2C communication protocol, data can be transmitted bidirectionally between the sending device and the receiving device. The data is sent during the high level period of the clock signal. For example, when the terminal device needs to send multimedia data, the command of the I2C interface is used to read the E-EDID (Enhanced Extended Display Identification Data) of the receiving device. The data contains detailed parameters and capability information of the receiving device. The EDID data is usually divided into multiple blocks for transmission. After each data byte, the terminal device sends a response signal until the EDID data transmission is completed.

[0053] Optionally, in Figures 1 to 4 In addition to the multimedia signal bidirectional transmission device of the embodiment of the present application, the device may also include: a second power supply module, which is used to supply power to the outside through the HDMI interface module when the target control signal input to the multimedia signal bidirectional transmission device is in the first level state.

[0054] Figure 5 A schematic diagram of actual circuit connection of the second power supply module in an embodiment of the present application is given, such as Figure 5 As shown, the second power supply module includes: a fifth power supply module 5V_Sys, a third voltage control chip U106, a fifteenth resistor R153 and a sixteenth resistor R152, wherein the third voltage control chip U106 includes: a third enable pin EN, a third input pin IN, a third signal pin FLG, a third ground pin GND and a third output pin OUT, the target control signal IN_OUT_SW is input to the third enable pin EN, the third input pin IN is connected to the fifth power supply module 5V_Sys, the second signal pin FLG is connected to the first end of the fifteenth resistor R153, the third ground pin GND is grounded, the third output pin OUT is connected to the first end of the sixteenth resistor R152, the third output pin OUT is connected to the HDMI interface module, the second end of the sixteenth resistor R153 is grounded, and the second end of the fifteenth resistor R153 is connected to the fifth power supply module 5V_Sys.

[0055] The second power supply module is used to control the third output pin to output the third target voltage +5V_HDMI when the target control signal IN_OUT_SW input to the third enable pin EN is a preset high level. This voltage is specified in the HDMI interface module standard and is used to provide the necessary power for the HDMI cable and connected devices to ensure stable signal transmission.

[0056] Optionally, in Figures 1 to 5 In addition to the multimedia signal bidirectional transmission device of the embodiment of the present application, the device may also include: a hot plug detection signal transmission module, which is used to transmit the hot plug signal from the HDMI interface module to the terminal device when the target control signal of the input multimedia signal bidirectional transmission device is in a first level state, and transmit the hot plug signal from the terminal device to the HDMI interface module when the target control signal of the input multimedia signal bidirectional transmission device is in a second level state.

[0057] Figure 6 A schematic diagram of actual circuit connection of the hot-swap detection signal transmission module of an embodiment of the present application is given, as shown in FIG. Figure 6 As shown, the hot plug detection signal transmission module includes: a fifth MOS tube Q106B, a sixth MOS tube Q107B and a seventeenth resistor R154, wherein the target control signal IN_OUT_SW is input to the gate of the fifth MOS tube Q106B, the source S1 of the fifth MOS tube Q106B is connected to the terminal device, the gate of the sixth MOS tube Q107B is connected to the second power submodule, the drain of the sixth MOS tube Q107B is respectively connected to the first end of the seventeenth resistor and the terminal device, the drain of the fifth MOS tube Q106B and the source of the sixth MOS tube Q107B are respectively connected to the HDMI interface module, and the second end of the seventeenth resistor R154 is connected to the third output pin of the third voltage control chip U106.

[0058] The gate of the fifth MOS tube Q107B in the hot plug detection signal transmission module receives the target control signal IN_OUT_SW. When IN_OUT_SW is in a preset high level state, the fifth MOS tube is activated, allowing the hot plug detection signal to be transmitted from the HDMI interface module to the terminal device. On the contrary, when IN_OUT_SW is in a preset low level state and IN_OUT_SW_N is in a preset high level state, the sixth MOS tube is in a conducting state, so that the hot plug detection signal can be transmitted from the terminal device to the HDMI interface module. This module switches the transmission direction of the HPD signal by controlling the level state of the signal IN_OUT_SW, ensuring that the connection status of the HDMI cable can be accurately monitored and responded to regardless of the input or output mode, thereby maintaining the stability and integrity of the signal transmission.

[0059] Optionally, in combination with the above-mentioned composition of the multimedia signal bidirectional transmission device, the present application provides a method for transmitting a multimedia signal in a bidirectional manner. Figures 1 to 6 The overall structure diagram of the component modules, terminal equipment and HDMI interface module for bidirectional transmission of multimedia signals is shown in FIG. Figure 7As shown, the overall structure diagram includes: a terminal device 71, a first power module 72, a multimedia signal transmission module 73, a configuration parameter transmission module 74, a hot plug detection signal transmission module 75, a second power module 76, and an HDMI interface module 77. The first power module 72 includes: a first power submodule 721 and a second power submodule 722. The multimedia signal transmission module includes: a first multimedia signal transmission submodule 731 and a second multimedia signal transmission submodule 732. The configuration parameter transmission module 74 includes: a first configuration parameter transmission submodule 741 and a second configuration parameter transmission submodule 752.

[0060] Figure 8 A circuit connection diagram of the terminal device and the first multimedia transmission submodule is given, such as Figure 8 As shown, the terminal device includes: a first chip DP++or HDMI from GPU, and the first multimedia signal transmission submodule includes: a first conversion chip U101, a fifth resistor R120 and a sixth resistor R121.

[0061] exist Figure 8 The first chip DP++or HDMI from GPU includes: three pairs of third data output pins D2, D1 and D0, a pair of third clock output pins CLK, a first control pin CEC, a first serial clock pin SCL, a first serial data pin SDA, and a first hot plug detection signal pin HPD; the first conversion chip includes: three pairs of first data input pins, a pair of first clock input pins, and multiple first power pins.

[0062] like Figure 8 As shown, a pair of third data output pins D2 of the first chip DP++or HDMI from GPU are connected to a pair of first data input pins A0RX+ and A0RX- of the first conversion chip U101 through capacitors C120 and C121 respectively, a pair of third data output pins D1 of the first chip DP++or HDMI from GPU are connected to a pair of first data input pins A1RX+ and A1RX- of the first conversion chip U101 through capacitors C122 and C123 respectively, a pair of third data output pins D0 of the first chip DP++orHDMI from GPU are connected to a pair of first data input pins A2RX+ and A2RX- of the first conversion chip U101 through capacitors C124 and C125 respectively, and a pair of third data output pins CLK of the first chip DP++or HDMI from GPU are connected to a pair of first clock input pins A3RX+ and A3RX- of the first conversion chip U101 through capacitors C126 and C127 respectively, for transmitting the first multimedia data.

[0063] In addition, if Figure 8 As shown, the first control pin CEC of the first chip DP++or HDMI from GPU is connected to the first output pin of the first voltage control chip U103 in the first power sub-module through the eighteenth resistor R105, that is, the first target voltage +3V3_OUT is input, which is represented as +3V3 in the figure, the first serial clock pin SCL of the first chip DP++or HDMI from GPU is connected to the source of the first MOS tube of the configuration parameter transmission module, the first serial data pin SDA of the first chip DP++or HDMI from GPU is connected to the source of the second MOS tube of the configuration parameter transmission module, and the first hot plug detection signal pin HPD of the first chip DP++orHDMI from GPU is connected to the source of the fifth MOS tube of the hot plug detection signal transmission module.

[0064] exist Figure 8 In the embodiment, the first conversion chip U101 has a plurality of first power pins VCC connected to the first output pin of the first voltage control chip U103 in the first power submodule. When the plurality of first power pins VCC receive a high level, the first conversion chip starts to transmit the first multimedia data of the terminal device to the HDMI interface module, and then to the external device. In addition, the first protection pin FG1 is connected to the first end of the fifth resistor R120, the second protection pin FG0 is connected to the first end of the sixth resistor R121, the second end of the fifth resistor R120 is grounded, and the second end of the sixth resistor R121 is grounded.

[0065] Fig. 9 A circuit connection diagram of the terminal device and the second multimedia transmission submodule is given, such as Fig. 9 As shown, the terminal device includes: a second chip HDMIINPUT, the second multimedia signal transmission submodule includes: a second conversion chip U104, the second chip includes: three pairs of third data input pins D2, D1 and D0, a pair of third clock input pins CLK, a second serial clock pin SCL, a second serial data pin SDA, a second hot plug detection signal pin HPD, and the second conversion chip includes: three pairs of second data output pins, a pair of second clock input pins and multiple second power pins.

[0066] like Fig. 9As shown, a pair of third data input pins D2 of the second chip HDMIINPUT are connected to a pair of second data output pins A0TX+ and A0TX- of the second conversion chip U104, a pair of third data input pins D1 of the second chip HDMIINPUT are connected to a pair of second data output pins A1TX+ and A1TX- of the second conversion chip U104, a pair of third data input pins D0 of the second chip HDMIINPUT are connected to a pair of second data output pins A2TX+ and A2TX- of the second conversion chip U104, and a pair of third clock input pins CLK of the second chip HDMIINPUT are connected to a pair of second clock output pins A3TX+ and A3TX- of the second conversion chip U104, for receiving second multimedia data transmitted externally to the terminal device.

[0067] In addition, if Fig. 9 As shown, multiple second power pins of the second chip HDMIINPUT are connected to the second output pin of the second voltage control chip of the second power submodule. When the multiple second power pins VCC receive a high level, the second conversion chip is started to transmit the second multimedia data received by the HDMI interface module to the terminal device. The second serial clock pin SCL of the second chip HDMIINPUT is connected to the source of the third MOS tube of the configuration parameter transmission module, the second serial data pin SDA of the second chip HDMIINPUT is connected to the source of the fourth MOS tube of the configuration parameter transmission module, and the second hot plug detection signal pin HPD of the second chip HDMIINPUT is connected to the source of the sixth MOS tube of the hot plug detection signal transmission module.

[0068] It should be noted that the multimedia data transmitted between the first chip, the second chip, the first conversion chip, the second conversion chip and the interface module can be transmitted using TMDS (Transition Minimized Differential Signaling) technology. Each TMDS channel can independently transmit multimedia data and clock. There are three TMDS channels in the HDMI interface, each channel is responsible for transmitting a part of the multimedia data, and there is also a TMDS clock signal channel for synchronizing the three data channels.

[0069] Fig.10 A schematic diagram of the actual circuit connection of the HDMI interface module of the embodiment of the present application is given. Fig.10 As shown, the HDMI interface module includes: a sixth power supply module +5V_USB, an HDMI interface J102, and multiple resistors, such as Fig.10As shown, the HDMI interface J02 includes: three pairs of data signal pins: D2+, D2-, D1+, D1-, D0+ and D0-, a pair of clock signal pins CK+ and CK-, a third serial clock pin SCL, a third serial data pin SDA, a third hot plug detection signal pin HPD, a third power pin +5V and multiple ground pins D2 SHIFLD, D1 SHIFLD, D0 SHIFLD, CK SHIFLD, PGND and SHELL1.

[0070] exist Fig.10 In the embodiment, a pair of second data input pins A0RX+ and A0RX- of the second chip HDMIINPUT are connected to a pair of data signal pins D2+ and D2- of the HDMI interface, a pair of second data input pins A1RX+ and A1RX- of the second chip HDMIINPUT are connected to a pair of data signal pins D1+ and D1- of the HDMI interface, a pair of second data input pins A2RX+ and A2RX- of the second chip HDMIINPUT are connected to a pair of data signal pins D1+ and D1- of the HDMI interface, and a pair of second clock input pins A3RX+ and A3RX- of the second chip HDMIINPUT are connected to a pair of clock signal pins CK+ and CK- of the HDMI interface.

[0071] The third serial data pin SDA of the HDMI interface J102 is respectively connected to the source of the second MOS tube, the source of the fourth MOS tube and the first end of the twenty-eighth resistor R104 of the configuration parameter transmission module, the third hot plug detection signal pin HPD of the HDMI interface is respectively connected to the drain of the fifth MOS tube and the source of the sixth MOS tube of the hot plug detection signal transmission module, the third power pin +5V of the HDMI interface is connected to the third output pin of the third voltage control chip U106 in the second power supply module, that is, the third target voltage +5V_HDMI is input, the other pins of the HDMI interface are grounded, and the second end of the twenty-seventh resistor R103 and the second end of the twenty-eighth resistor R104 are both connected to the sixth power supply module +5V_USB.

[0072] According to 8, 9 and 10, the working modes of the terminal device, the multimedia signal transmission module and the HDMI interface module can be summarized as follows:

[0073] When IN_OUT_SW is a preset high level, it means that all modules and devices are in output mode. At this time, the first control chip in the first power submodule is activated, and its first output pin starts to output the first target voltage, namely +3V3_OUT. This voltage is specially designed for the startup and operation of the first multimedia signal transmission submodule to ensure that the first conversion chip can get sufficient power support. Driven by the +3V3_OUT voltage, the first conversion chip in the first multimedia signal transmission submodule is started, which can optimize the first multimedia data to be transmitted and is responsible for transmitting the first multimedia data of the terminal device to the HDMI interface module.

[0074] Among them, in the output mode, the terminal device obtains the first configuration parameters from the HDMI interface module through the first configuration parameter transmission submodule. These configuration parameters contain detailed information of the external device to be received, such as screen size, resolution and refresh rate, etc. The terminal device uses this information to optimize the configuration of the first multimedia data to ensure that the output signal can match the optimal performance of the external device and provide the best display effect. Based on the first configuration parameters received from the HDMI interface module, the terminal device can adjust the format of the video and audio signals, such as setting the correct resolution and refresh rate to adapt to the display requirements of the external device. This step ensures that when the first multimedia data is transmitted to the external device, the data can be correctly parsed and displayed by the external device, thereby improving the transmission efficiency and display quality. The hot plug detection signal transmission module receives the hot plug detection signal transmitted by the external device and transmits it to the terminal device.

[0075] Finally, the HDMI interface module transmits the optimized first multimedia data to the external receiving device. After receiving the first multimedia data, the external device can immediately start displaying video and playing audio based on the information previously exchanged through the hot plug detection signal transmission module and the configuration parameter transmission module without the need for additional settings or adjustments, thereby providing users with a seamless and high-quality multimedia experience.

[0076] In input mode, the IN_OUT_SW signal is a preset low level, which causes the base of the transistor Q104 to receive a low level signal. Based on the characteristics of the transistor, when the base is at a low level, the collector (i.e., pin 3) level is a preset high level, activating the second power submodule. Since the collector level of Q104 is high, the second output pin of the second power submodule begins to output a second target voltage +3V3_INPUT. This voltage provides power for the operation of the first multimedia signal transmission submodule and data processing in the receiving mode. Under the control of +3V3_INPUT, the second conversion chip in the second multimedia signal transmission submodule is started, ready to receive and process data transmitted from the HDMI interface module. Driven by this voltage, the first conversion chip can receive the second multimedia data input from the HDMI interface module, optimize the data, and transmit it to the terminal device.

[0077] Among them, in the input mode, the terminal device outputs the second configuration parameters through the second configuration parameter transmission submodule. These configuration parameters contain detailed information of the terminal device, such as screen size, resolution and refresh rate, etc. The external device uses this information to optimize the configuration of the second multimedia data to ensure that the output signal can match the optimal performance of the terminal device and provide the best display effect. Based on the first configuration parameters received from the HDMI interface module, the terminal device can adjust the format of the video and audio signals, such as setting the correct resolution and refresh rate to adapt to the display requirements of the terminal. Based on the second configuration parameters, the external sending device configures its output video and audio signals to ensure that the signals can best match the performance of the terminal device. The hot plug detection signal transmission module transmits the hot plug detection signal to the external device.

[0078] Finally, the HDMI interface module receives the second multimedia data, and the second multimedia signal transmission submodule transmits the optimized second multimedia data to the terminal device. After receiving the second multimedia data, the terminal device can immediately start displaying video and playing audio based on the information previously exchanged through the hot plug detection signal transmission module and the configuration parameter transmission module without the need for additional settings or adjustments, thereby providing users with a seamless and high-quality multimedia experience.

[0079] In an embodiment of the present application, a multimedia signal bidirectional transmission device includes: a first power supply module, a multimedia signal transmission module and a configuration parameter transmission module, wherein the first power supply module includes a first power supply submodule and a second power supply submodule, the multimedia signal transmission module includes a first multimedia signal transmission submodule and a second multimedia signal transmission submodule, and the configuration parameter transmission module includes a first configuration parameter transmission submodule and a second configuration parameter transmission submodule; when the target control signal input to the multimedia signal bidirectional transmission device is in a first level state, the first power supply submodule is used to power the first multimedia signal transmission submodule; the first configuration parameter transmission submodule is used to transmit the first configuration parameter from the HDMI interface module to the terminal device; the first multimedia signal transmission submodule is used to transmit the first multimedia data configured by the terminal device according to the first configuration parameter to the HDMI interface module; when the target control signal input to the multimedia signal bidirectional transmission device is in a second level state, the second power supply submodule is used to power the second multimedia signal transmission submodule; the second configuration parameter transmission submodule is used to transmit the second configuration parameter from the terminal device to the HDMI interface module; the second multimedia signal transmission submodule is used to transmit the second multimedia data from the HDMI interface module to the terminal device, wherein the second multimedia data is obtained according to the second configuration parameter configuration. Through this device, when the HDMI interface module needs to be used as an output, the first multimedia signal transmission submodule is activated to transmit data from the terminal device to the HDMI interface module, and when the HDMI interface module needs to be used as an input, the second multimedia signal transmission submodule is activated to transmit data from the HDMI interface module to the terminal device, thereby solving the technical problem that the traditional HDMI interface can only realize one-way signal transmission but cannot be compatible with both input and output functions.

[0080] Example 2

[0081] According to an embodiment of the present application, a multimedia signal bidirectional transmission system for implementing the multimedia signal bidirectional transmission device in Embodiment 1 is also provided. Fig.11 As shown, the multimedia signal bidirectional transmission system at least includes: a terminal device 111, a multimedia signal bidirectional transmission device 112 of any one embodiment 1, and an HDMI interface module 113.

[0082] The functions of each module in the multimedia signal bidirectional transmission system are described below in conjunction with a specific implementation process.

[0083] Combined with the examples given Figures 1 to 10In the multimedia signal bidirectional transmission device, in the multimedia signal bidirectional transmission system, when IN_OUT_SW is a preset high level, it means that all modules and devices are in output mode. At this time, the first control chip in the first power submodule is activated, and its first output pin starts to output the first target voltage, namely +3V3_OUT. This voltage is specially designed for the startup and operation of the first multimedia signal transmission submodule to ensure that the first conversion chip can get enough power support. Driven by the +3V3_OUT voltage, the first conversion chip in the first multimedia signal transmission submodule is started, which can optimize the first multimedia data to be transmitted and is responsible for transmitting the first multimedia data of the terminal device to the HDMI interface module.

[0084] Among them, in the output mode, the terminal device obtains the first configuration parameters from the HDMI interface module through the first configuration parameter transmission submodule. These configuration parameters contain detailed information of the external device to be received, such as screen size, resolution and refresh rate, etc. The terminal device uses this information to optimize the configuration of the first multimedia data to ensure that the output signal can match the optimal performance of the external device and provide the best display effect. Based on the first configuration parameters received from the HDMI interface module, the terminal device can adjust the format of the video and audio signals, such as setting the correct resolution and refresh rate to adapt to the display requirements of the external device. This step ensures that when the first multimedia data is transmitted to the external device, the data can be correctly parsed and displayed by the external device, thereby improving the transmission efficiency and display quality. The hot plug detection signal transmission module receives the hot plug detection signal transmitted by the external device and transmits it to the terminal device.

[0085] Finally, the HDMI interface module transmits the optimized first multimedia data to the external receiving device. After receiving the first multimedia data, the external device can immediately start displaying video and playing audio based on the information previously exchanged through the hot plug detection signal transmission module and the configuration parameter transmission module without the need for additional settings or adjustments, thereby providing users with a seamless and high-quality multimedia experience.

[0086] In input mode, the IN_OUT_SW signal is a preset low level, which causes the base of the transistor Q104 to receive a low level signal. Based on the characteristics of the transistor, when the base is at a low level, the collector (i.e., pin 3) level is a preset high level, activating the second power submodule. Since the collector level of Q104 is high, the second output pin of the second power submodule begins to output a second target voltage +3V3_INPUT. This voltage provides power for the operation of the first multimedia signal transmission submodule and data processing in the receiving mode. Under the control of +3V3_INPUT, the second conversion chip in the second multimedia signal transmission submodule is started, ready to receive and process data transmitted from the HDMI interface module. Driven by this voltage, the first conversion chip can receive the second multimedia data input from the HDMI interface module, optimize the data, and transmit it to the terminal device.

[0087] Among them, in the input mode, the terminal device outputs the second configuration parameters through the second configuration parameter transmission submodule. These configuration parameters contain detailed information of the terminal device, such as screen size, resolution and refresh rate, etc. The external device uses this information to optimize the configuration of the second multimedia data to ensure that the output signal can match the optimal performance of the terminal device and provide the best display effect. Based on the first configuration parameters received from the HDMI interface module, the terminal device can adjust the format of the video and audio signals, such as setting the correct resolution and refresh rate to adapt to the display requirements of the terminal. Based on the second configuration parameters, the external sending device configures its output video and audio signals to ensure that the signals can best match the performance of the terminal device. The hot plug detection signal transmission module transmits the hot plug detection signal to the external device.

[0088] Finally, the HDMI interface module receives the second multimedia data, and the second multimedia signal transmission submodule transmits the optimized second multimedia data to the terminal device. After receiving the second multimedia data, the terminal device can immediately start displaying video and playing audio based on the information previously exchanged through the hot plug detection signal transmission module and the configuration parameter transmission module without the need for additional settings or adjustments, thereby providing users with a seamless and high-quality multimedia experience.

[0089] It should be noted that each module in the multimedia signal bidirectional transmission device in the embodiment of the present application corresponds one by one to each implementation step of the multimedia signal bidirectional transmission device in Example 1. Since a detailed description has been given in Example 1, some details not reflected in this embodiment can be referred to Example 1 and will not be repeated here.

[0090] The serial numbers of the above embodiments are only for description and do not represent the advantages or disadvantages of the embodiments.

[0091] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0093] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0094] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0095] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.

[0096] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A multimedia signal bidirectional transmission device, characterized in that: include: A first power supply module, a multimedia signal transmission module and a configuration parameter transmission module, wherein: The first power supply module includes a first power supply submodule and a second power supply submodule, the multimedia signal transmission module includes a first multimedia signal transmission submodule and a second multimedia signal transmission submodule, and the configuration parameter transmission module includes a first configuration parameter transmission submodule and a second configuration parameter transmission submodule; When the target control signal input to the multimedia signal bidirectional transmission device is in the first level state, the first power supply submodule is used to supply power to the first multimedia signal transmission submodule; the first configuration parameter transmission submodule is used to transmit the first configuration parameter from the HDMI interface module to the terminal device; the first multimedia signal transmission submodule is used to transmit the first multimedia data configured by the terminal device according to the first configuration parameter to the HDMI interface module; When the target control signal input into the multimedia signal bidirectional transmission device is in the second level state, the second power supply submodule is used to power the second multimedia signal transmission submodule; the second configuration parameter transmission submodule is used to transmit the second configuration parameters from the terminal device to the HDMI interface module; the second multimedia signal transmission submodule is used to transmit the second multimedia data from the HDMI interface module to the terminal device, wherein the second multimedia data is obtained according to the second configuration parameter configuration.

2. The device according to claim 1, characterized in that: The first power supply submodule includes: a first power supply module, a first voltage control chip, a first voltage stabilizing module, a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor, and the first voltage control chip includes: a first enable pin, a first input pin, a first signal pin, a first ground pin and a first output pin, wherein the target control signal is input to the first enable pin, the first enable pin is connected to the first end of the first resistor, the first input pin is respectively connected to the positive electrode of the first capacitor and the first power supply module, the first signal pin is connected to the first end of the second resistor, the first ground pin is grounded, the first output pin is respectively connected to the positive electrode of the second capacitor, the positive electrode of the third capacitor, the first multimedia signal transmission submodule and the first voltage stabilizing module, the second end of the first resistor is connected to the first power supply module, the negative electrode of the first capacitor is grounded, the second end of the second resistor is connected to the first power supply module, the negative electrode of the second capacitor is grounded, and the negative electrode of the third capacitor is grounded; The second power supply submodule includes: a second power supply module, a first transistor, a second voltage control chip, a second voltage stabilizing module, a third resistor, a fourth resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor, wherein the target control signal is input into the base of the first transistor, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to the second voltage control chip; the second voltage control chip includes: a second enable pin, a second input pin, a second signal pin, a second ground pin and a second output pin; the second enable pin is respectively connected to the first end of the third resistor and the collector of the first transistor; the second input pin is respectively connected to the positive electrode of the fourth capacitor and the second power supply module; the second signal pin is connected to the first end of the fourth resistor; the second ground pin is grounded; the second output pin is respectively connected to the positive electrode of the fifth capacitor, the positive electrode of the sixth capacitor, the second multimedia signal transmission submodule and the second voltage stabilizing module; the second end of the third resistor is connected to the second power supply module; the negative electrode of the fourth capacitor is grounded; the second end of the fourth resistor is connected to the second power supply module; the negative electrode of the fifth capacitor is grounded; and the negative electrode of the sixth capacitor is grounded.

3. The device according to claim 2, characterized in that: The first voltage stabilizing module includes: a plurality of seventh capacitors, wherein positive electrodes of all the seventh capacitors are connected to the first output pin, and negative electrodes of all the seventh capacitors are grounded; The second voltage stabilizing module includes: a plurality of eighth capacitors, wherein positive electrodes of all the eighth capacitors are connected to the second output pin, and negative electrodes of all the eighth capacitors are grounded.

4. The device according to claim 2, characterized in that: The first multimedia signal transmission submodule includes: a first conversion chip, a fifth resistor and a sixth resistor, wherein the first conversion chip includes: a plurality of first power pins, a first protection pin, a second protection pin, three pairs of first data input pins, three pairs of first data output pins, a pair of first clock input pins, and a pair of first clock output pins, the plurality of first power pins are connected to the first output pin, the first protection pin is connected to the first end of the fifth resistor, the second protection pin is connected to the first end of the sixth resistor, the second end of the fifth resistor is grounded, the second end of the sixth resistor is grounded, the first data input pin and the first clock input pin are both connected to the terminal device, and the first data output pin and the first clock output pin are both connected to the HDMI interface module; The second multimedia signal transmission submodule includes: a second conversion chip, wherein the second conversion chip includes: a plurality of second power pins, three pairs of second data input pins, three pairs of second data output pins, a pair of second clock input pins, and a pair of second clock output pins, the plurality of second power pins are connected to the second output pins, the second data input pin and the second clock input pin are both connected to the HDMI interface module, and the second data output pin and the second clock output pin are both connected to the terminal device.

5. The device according to claim 4, characterized in that: The first configuration parameter transmission submodule includes: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first MOS transistor and a second MOS transistor, and the second configuration parameter transmission submodule includes: an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a third MOS transistor and a fourth MOS transistor, wherein, The target control signal is input to the gate of the first MOS transistor, the source of the first MOS transistor is respectively connected to the first end of the seventh resistor and the terminal device, the drain of the first MOS transistor is respectively connected to the first end of the eighth resistor and the HDMI interface module, the second end of the seventh resistor is connected to the third power supply module, and the second end of the eighth resistor is connected to the fourth power supply module; The target control signal is input to the gate of the second MOS transistor, the source of the second MOS transistor is respectively connected to the first end of the ninth resistor and the terminal device, the drain of the second MOS transistor is respectively connected to the first end of the tenth resistor and the HDMI interface module, the second end of the ninth resistor is connected to the third power supply module, and the second end of the tenth resistor is connected to the fourth power supply module; The source of the third MOS tube is connected to the first end of the eleventh resistor and the terminal device respectively, the drain of the third MOS tube is connected to the first end of the twelfth resistor and the HDMI interface module respectively, the second end of the eleventh resistor is connected to the third power supply module, the second end of the twelfth resistor is connected to the fourth power supply module, and the gate of the third MOS tube is connected to the collector of the first transistor; The source of the fourth MOS tube is respectively connected to the first end of the thirteenth resistor and the terminal device, the drain of the fourth MOS tube is respectively connected to the first end of the fourteenth resistor and the HDMI interface module, the second end of the thirteenth resistor is connected to the third power supply module, the second end of the fourteenth resistor is connected to the fourth power supply module, and the gate of the fourth MOS tube is connected to the collector of the first transistor.

6. The device according to claim 1, characterized in that The device also includes: The second power supply module is used to supply power to the outside through the HDMI interface module when the target control signal input to the multimedia signal bidirectional transmission device is in a first level state.

7. The device according to claim 6, characterized in that: The second power supply module includes: a fifth power supply module, a third voltage control chip, a fifteenth resistor and a sixteenth resistor, wherein the third voltage control chip includes: a third enable pin, a third input pin, a third signal pin, a third ground pin and a third output pin, the target control signal is input into the third enable pin, the third input pin is connected to the fifth power supply module, the third signal pin is connected to the first end of the fifteenth resistor, the third ground pin is grounded, the third output pin is respectively connected to the first end of the sixteenth resistor and the HDMI interface module, the second end of the sixteenth resistor is grounded, and the second end of the fifteenth resistor is connected to the fifth power supply module.

8. The device according to claim 7, characterized in that The device also includes: A hot plug detection signal transmission module is used to transmit the hot plug signal from the HDMI interface module to the terminal device when the target control signal input to the multimedia signal bidirectional transmission device is in a first level state, and to transmit the hot plug signal from the terminal device to the HDMI interface module when the target control signal input to the multimedia signal bidirectional transmission device is in a second level state.

9. The device according to claim 8, characterized in that: The hot-plug detection signal transmission module includes: a fifth MOS tube, a sixth MOS tube and a seventeenth resistor, wherein the target control signal is input into the gate of the fifth MOS tube, the source of the fifth MOS tube is connected to the terminal device, the gate of the sixth MOS tube is connected to the second power submodule, the drain of the sixth MOS tube is respectively connected to the first end of the seventeenth resistor and the terminal device, the drain of the fifth MOS tube and the source of the sixth MOS tube are respectively connected to the HDMI interface module, and the second end of the seventeenth resistor is connected to the third output pin.

10. A multimedia signal bidirectional transmission system, characterized in that: include: Terminal equipment, a multimedia signal bidirectional transmission device as described in any one of claims 1 to 9, and an HDMI interface module.

11. The system according to claim 10, characterized in that: The multimedia signal bidirectional transmission device also includes: a second power supply module and a hot plug detection signal transmission module; The terminal device comprises: a first chip for configuring the first multimedia data and a second chip for receiving the second multimedia data; The HDMI interface module includes: a sixth power supply module and an HDMI interface; The first multimedia signal transmission submodule includes: a first conversion chip; The second multimedia signal transmission submodule includes: a second conversion chip; The first power submodule includes: a first voltage control chip; The second power submodule includes: a second voltage control chip; The first configuration parameter transmission submodule includes: a first MOS transistor and a second MOS transistor; The second configuration parameter transmission submodule includes: a third MOS tube and a fourth MOS tube; The second power supply module includes: a third voltage control chip; The hot-swap detection signal transmission module includes: a fifth MOS tube, a sixth MOS tube and a seventeenth resistor; The first chip is respectively connected to the first conversion chip, the source of the first MOS tube, the source of the second MOS tube, the source of the fifth MOS tube and the first voltage control chip, and the first conversion chip is respectively connected to the HDMI interface and the first voltage control chip; the second chip is respectively connected to the second conversion chip, the source of the third MOS tube, the source of the fourth MOS tube and the drain of the sixth MOS tube, and the second conversion chip is respectively connected to the HDMI interface and the second voltage control chip; the HDMI interface is respectively connected to the third voltage control chip, the drain of the first MOS tube, the drain of the second MOS tube, the drain of the fifth MOS tube, the drain of the third MOS tube, the drain of the fourth MOS tube and the source of the sixth MOS tube.

12. The system according to claim 11, characterized in that: The first chip includes: three pairs of third data output pins, a pair of third clock output pins, a first control pin, a first serial clock pin, a first serial data pin, and a first hot plug detection signal pin; The second chip includes: three pairs of third data input pins, a pair of third clock input pins, a second serial clock pin, a second serial data pin, and a second hot plug detection signal pin; The first conversion chip includes: three pairs of first data input pins and one pair of first clock input pins; The second conversion chip includes: three pairs of second data output pins and one pair of second clock input pins; Each pair of the third data output pins is connected to a pair of the first data input pins through a pair of ninth capacitors, a pair of the third clock output pins is connected to a pair of the first clock input pins through a pair of tenth capacitors, the first control pin is connected to the first output pin of the first voltage control chip through an eighteenth resistor, the first serial clock pin is connected to the source of the first MOS tube, the first serial data pin is connected to the source of the second MOS tube, and the first hot plug detection signal pin is connected to the source of the fifth MOS tube; Each pair of the third data input pins is connected to a pair of the first data output pins, a pair of the third clock input pins is connected to a pair of the first clock output pins, the second serial clock pin is connected to the source of the third MOS tube, the second serial data pin is connected to the source of the fourth MOS tube, and the second hot plug detection signal pin is connected to the drain of the sixth MOS tube.

13. The system according to claim 12, characterized in that: The HDMI interface comprises: three pairs of data signal pins, a pair of clock signal pins, a third serial clock pin, a third serial data pin, a third hot plug detection signal pin, a third power pin and a plurality of ground pins; The first conversion chip includes: three pairs of first data output pins and one pair of first clock output pins; The second conversion chip includes: three pairs of second data input pins and one pair of second clock input pins; Each pair of the first data output pins is connected to a pair of the data signal pins through a pair of nineteenth resistors, a pair of the first clock output pins is connected to a pair of the clock signal pins through a pair of twentieth resistors, each pair of the second data input pins is connected to a pair of the data signal pins, a pair of the second clock input pins is connected to a pair of the clock signal pins, the third serial clock pin is respectively connected to the drain of the first MOS tube, the drain of the third MOS tube and the first end of the twenty-first resistor, the third serial data pin is respectively connected to the drain of the second MOS tube, the drain of the fourth MOS tube and the first end of the twenty-second resistor, the third hot plug detection signal pin is respectively connected to the drain of the fifth MOS tube and the source of the sixth MOS tube, the third power supply pin is connected to the third output pin of the third voltage control chip, the third power supply pin is also connected to the drain of the sixth MOS tube through the seventeenth resistor, the multiple grounding pins are grounded, and the second end of the twenty-first resistor and the second end of the twenty-second resistor are respectively connected to the sixth power supply module.

Images