Data transmission device

Abstract

The utility model provides a data transmission device which comprises a bidirectional interface module, a control module and a multimedia processing chip, and the data transmission device is electrically connected with a display terminal. Wherein the first end of the bidirectional interface module is electrically connected with the first end of the control module, and the second end of the bidirectional interface module is electrically connected with the first end of the multimedia processing chip; the second end of the control module is electrically connected with the second end of the multimedia processing chip; the third end of the multimedia processing chip is electrically connected with the first end of the display terminal; the two-way interface module is electrically connected with the access equipment on the opposite side through the connecting device; the control module is used for controlling and switching function types of the bidirectional interface module, and the function types comprise a sending function and a receiving function; the multimedia processing chip is used for carrying out data adjustment on the target electric signal, and the data adjustment comprises adaptive data adjustment and / or coding and decoding operation. Therefore, the number of occupied interfaces can be reduced, the flexibility of media data transmission is improved, and the compatibility of access equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to data transmission field especially relates to a data transmission device. BACKGROUND

[0002] HDMI (High-Definition Multimedia Interface) interface is widely used for transmitting high-definition video and audio signals. However, the receiving function and the transmitting function of the conventional HDMI interface are separated, and cannot be implemented simultaneously on one interface, and the device needs more space to install multiple interfaces, and in use, the data cannot be flexibly regulated in data transmission. This limits the compatibility of the access device and the flexibility of data transmission. SUMMARY

[0003] The embodiment of the application provides a data transmission device, which can reduce the number of occupied interfaces, improve the flexibility of media data transmission and improve the compatibility of the access device.

[0004] The embodiment of the application provides a data transmission device, which comprises a bidirectional interface module, a control module and a multimedia processing chip, and is electrically connected with a display terminal; wherein,

[0005] The first end of the bidirectional interface module is electrically connected with the first end of the control module, and the second end of the bidirectional interface module is electrically connected with the second end of the multimedia processing chip; the second end of the control module is electrically connected with the third end of the multimedia processing chip; and the third end of the multimedia processing chip is electrically connected with the first end of the display terminal.

[0006] The bidirectional interface module comprises a bidirectional HDMI interface, and is electrically connected with an opposite access device through a connecting device, and is used for receiving a first electric signal of the opposite access device or sending a second electric signal to the opposite access device.

[0007] The control module is used for controlling the switching of the function type of the bidirectional interface module, and the function type comprises a sending function and a receiving function; the multimedia processing chip is used for data adjustment on a target electric signal, and the data adjustment comprises adaptive data adjustment and / or coding and decoding operation, and the target electric signal comprises the first electric signal or a third electric signal; and the display terminal is used for display based on the first electric signal or sending the third electric signal to the multimedia processing chip.

[0008] In a possible embodiment, the multimedia processing chip comprises a signal buffering module and a signal adjusting module, a first end of the signal adjusting module is electrically connected with a second end of the control module as a second end of the multimedia processing chip, a second end of the signal adjusting module is electrically connected with a second end of the bidirectional interface module as a first end of the multimedia processing chip, a first end of the signal buffering module is electrically connected with a third end of the signal adjusting module, and a second end of the signal buffering module is electrically connected with a first end of the display terminal as a third end of the multimedia processing chip;

[0009] The signal buffering module is configured to buffer the third electric signal from the display terminal and transmit the third electric signal to the signal adjusting module, and buffer a fourth electric signal from the signal adjusting module and transmit the fourth electric signal to the display terminal.

[0010] The signal adjusting module is configured to perform adaptive data adjustment on the first electric signal to obtain a fifth electric signal, and / or perform decoding operation on the fifth electric signal to obtain the fourth electric signal, and perform encoding operation on the third electric signal to obtain a sixth electric signal, and / or perform the adaptive data adjustment on the sixth electric signal to obtain the second electric signal.

[0011] In a possible embodiment, the device further comprises a sensor module, a fourth end of the signal adjusting module is electrically connected or communicatively connected with a first end of the sensor module as a fourth end of the multimedia processing chip, and the sensor module is configured to acquire environmental parameters of the display terminal and / or an environment in which a counterpart access device is located, and transmit the environmental parameters to the signal adjusting module.

[0012] In a possible embodiment, the signal adjustment module comprises a switching module and an adjustment module, the switching module comprises a channel module and a D-HUB module, a first end of the switching module is connected with the second end of the control module as a first end of the signal adjustment module, a second end of the switching module is connected with the second end of the bidirectional interface module as a second end of the signal adjustment module, a third end of the switching module is connected with a first end of the adjustment module, a second end of the adjustment module is connected with a first end of the signal cache module as a third end of the signal adjustment module; a first end of the D-HUB module is electrically connected with a first end of the channel module, a second end of the D-HUB module is electrically connected with the second end of the control module as the first end of the signal adjustment module; a second end of the channel module is connected with the second end of the bidirectional interface module as the second end of the switching module, a third end of the channel module is electrically connected with the first end of the adjustment module as the third end of the switching module; the second end of the adjustment module is electrically connected with the first end of the signal cache module; a third end of the adjustment module is electrically connected with a first end of the sensor module as a fourth end of the signal adjustment module.

[0013] In a possible embodiment, the adaptive data adjustment comprises environmental adaptive adjustment, the sensor module comprises an environmental brightness sensor, and the adjustment module is configured to perform the environmental adaptive adjustment on the first electrical signal or the sixth electrical signal based on a sensing signal transmitted by the sensor module, the sensing signal comprising an environmental brightness signal.

[0014] In a possible embodiment, the display terminal is further configured to obtain an adjustment electrical signal from an external environment, and the adjustment module is further configured to receive the adjustment electrical signal from the display terminal and perform adaptive adjustment on the first electrical signal or the sixth electrical signal based on the adjustment electrical signal.

[0015] In a possible embodiment, when the adjustment module receives a signal in a first format transmitted by the signal cache module, the signal in the first format comprising the third electrical signal, the first format comprising a first video format and / or a first audio format, the adjustment module is configured to encode the signal in the first format into a signal in a second format, and send the signal in the second format to the bidirectional HDMI interface, the second format comprising a second video format and / or a second audio format, the signal in the second format comprising the sixth electrical signal; when the adjustment module receives the signal in the second format transmitted by the bidirectional HDMI interface, the signal in the second format comprising the fifth electrical signal, the adjustment module is configured to decode the signal in the second format into the signal in the first format, and send the signal in the first format to the signal cache module, the signal in the first format comprising the fourth electrical signal.

[0016] In a possible embodiment, the bidirectional interface module further comprises an anti-interference module, the anti-interference module being configured to filter the seventh electrical signal obtained by the bidirectional HDMI interface; a first end of the anti-interference module is connected to a first end of the bidirectional HDMI interface through a data channel, the data channel comprising a DDC channel, the data channel being connected to the first end of the bidirectional HDMI interface through at least one first interface pin, and the first end of the anti-interference module being connected to the data channel through at least one second interface pin; a second end of the anti-interference module is connected to a first end of the control module through the data channel as a first end of the bidirectional interface module; a second end of the bidirectional HDMI interface is connected to a second end of the signal adjustment module as a second end of the bidirectional interface module, and is further connected to a second end of the switching module; the control module is configured to determine the device type of the opposite access device by detecting an eighth electrical signal when the connection device connected to the opposite access device is inserted into the bidirectional HDMI interface, the eighth electrical signal being a signal transmitted to the control module after the seventh electrical signal is processed by the anti-interference module, and the eighth electrical signal comprising the device type information of the opposite access device; the control module is further configured to control the switching function type of the bidirectional HDMI interface based on the device type, the device type comprising a sending device and a receiving device, if the device type is the sending device, the control module is configured to control the bidirectional HDMI interface to switch to the sending function, if the device type is the receiving device, the control module is configured to control the bidirectional HDMI interface to switch to the receiving function; the control module is further configured to send an adjustment signal to the D-HUB module based on the device type, the adjustment signal being configured to instruct the D-HUB module to configure a transmission channel of the channel module, the transmission channel comprising a sending channel and a receiving channel, the sending channel being configured to send the second electrical signal, and the receiving channel being configured to receive the first electrical signal transmitted by the second end of the bidirectional HDMI interface to the channel module.

[0017] In a possible embodiment, a second end of the control module is electrically connected to a second end of the display terminal, the display terminal is further configured to obtain a ninth electrical signal and send the ninth electrical signal to the control module, and the control module is further configured to control the bidirectional HDMI interface of the bidirectional interface module to switch the function type based on the ninth electrical signal, the ninth electrical signal comprising switching to the sending function or switching to the receiving function.

[0018] In a possible embodiment, a fourth end of the adjustment module is connected with a first end of the signal adjustment module, and further connected with a second end of the control module, the adaptive data adjustment further comprises parameter adaptive adjustment, the eighth electric signal further comprises device information of the opposite side access device, and the control module is further configured to send the eighth electric signal to the adjustment module, so that the adjustment module performs parameter adaptive adjustment based on the eighth electric signal, and the parameter adaptive adjustment comprises at least one of resolution adjustment, bit depth adjustment, and format conversion adjustment.

[0019] The data transmission device provided in the embodiment of the present application comprises a bidirectional interface module, a control module, and a multimedia processing chip, and is electrically connected with a display terminal; wherein a first end of the bidirectional interface module is electrically connected with a first end of the control module, and a second end of the bidirectional interface module is electrically connected with a first end of the multimedia processing chip; a second end of the control module is electrically connected with a second end of the multimedia processing chip; a third end of the multimedia processing chip is electrically connected with a first end of the display terminal; the bidirectional interface module comprises a bidirectional HDMI interface, and is electrically connected with an opposite side access device through a connecting device, and is configured to receive a first electric signal of the opposite side access device or send a second electric signal to the opposite side access device; the control module is configured to control switching of a function type of the bidirectional interface module, and the function type comprises a sending function and a receiving function; the multimedia processing chip is configured to perform data adjustment on a target electric signal, and the data adjustment comprises adaptive data adjustment and / or coding and decoding operation, and the target electric signal comprises the first electric signal or a third electric signal; and the display terminal is configured to perform display based on the first electric signal or send the third electric signal to the multimedia processing chip. The number of occupied interfaces can be reduced, and the flexibility of media data transmission and the compatibility of access devices can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments of the present application or the prior art will be described below.

[0021] Figure 1 is a device structure diagram of a first data transmission device provided by the embodiment of the present application;

[0022] Figure 2 is a device structure diagram of a second data transmission device provided by the embodiment of the present application;

[0023] Figure 3 is a device structure diagram of a third data transmission device provided by the embodiment of the present application;

[0024] Figure 4is a device structure diagram of a fourth data transmission device provided by an embodiment of the present application;

[0025] Figure 5 is a device structure diagram of a fifth data transmission device provided by an embodiment of the present application;

[0026] Figure 6 is a device structure diagram of a sixth data transmission device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work fall within the scope of protection of the present application.

[0028] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for purposes of illustration and description only and are not intended to limit the scope of the application.

[0029] The terms "first", "second", and the like, as used in the specification and claims of the present application and the above drawings, are intended to distinguish between different apparatuses, modules, or units, and do not imply a sequence or order of execution unless otherwise specified. In addition, the terms "comprise", "comprising", "have", "having", "include", "including", and "contain", "containing", or any other similar terms, are intended to cover a non-exclusive inclusion, unless otherwise specified. For example, a process, method, system, product, or electronic device that includes a list of steps or units is not limited to the listed steps or units, but can also include additional steps or units not listed, or other steps or units inherent to such processes, methods, products, or electronic devices in an alternative example.

[0030] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor does it necessarily refer to a particular alternative embodiment. It will be explicitly understood by one of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0031] Please refer to Figure 1 ,Figure 1 This is a structural diagram of a data transmission device provided in an embodiment of this application, as shown below. Figure 1 As shown, the data transmission device 100 includes: a bidirectional interface module 10, a control module 20, and a multimedia processing chip 30; the data transmission device 100 is electrically connected to a display terminal 40; wherein, the first end of the bidirectional interface module 10 is electrically connected to the first end of the control module 20, and the second end of the bidirectional interface module 10 is electrically connected to the first end of the multimedia processing chip 30; the second end of the control module 20 is electrically connected to the second end of the multimedia processing chip 30; the third end of the multimedia processing chip 30 is electrically connected to the first end of the display terminal 40; the bidirectional interface module 10 includes a bidirectional HDMI interface 11, and the bidirectional interface module 10... The interface module 10 is electrically connected to the access device 50 on the other side via a connection device, and is used to receive a first electrical signal from the access device 50 on the other side or to send a second electrical signal to the access device 50 on the other side; the control module 20 is used to control the switching of the function type of the bidirectional interface module 10, the function type including sending function and receiving function; the multimedia processing chip 30 is used to perform data adjustment on the target electrical signal, the data adjustment including adaptive data adjustment and / or encoding and decoding operations, the target electrical signal including the first electrical signal or the third electrical signal; the display terminal 40 is used to display based on the first electrical signal or to send the third electrical signal to the multimedia processing chip 30.

[0032] Please refer to the following: Figure 2 , Figure 2 This is a device structure diagram of the second data transmission device provided in the embodiments of this application. The bidirectional interface module 10 includes a bidirectional HDMI interface 11. The bidirectional HDMI interface 11 includes multiple pins as the first end of the bidirectional interface module 10. Specifically, the multiple pins may include TMDS differential pair signal pins, DDC channel pins, plug-in detection pins, and multiple other types of pins. The DDC channel pins and plug-in detection pins are used to electrically connect with the control module 20 so that the control module 20 can obtain the plug-in detection signal of the plug-in detection pin. The plug-in detection signal may include an HPD signal so that the control module 20 can obtain the device type signal of the DDC channel pin. The device type signal may include an EDID signal or a voltage signal.

[0033] The control module 20 may include an intelligent control circuit or an intelligent control chip, and has a port or pin connected to the DDC channel. The control module 20 is used to analyze the signal transmitted from the bidirectional HDMI interface 11 in the bidirectional interface module 10 and control the bidirectional HDMI interface 11 based on the analysis results.

[0034] The multimedia processing chip 30 is connected to the control module 20, the bidirectional interface module 10 and the display terminal 40 through pins or ports. The multimedia processing chip 30 is used to process signals obtained from the bidirectional interface module 10 or from the display terminal 40, which can be the first electrical signal obtained from the bidirectional interface module 10 or the third electrical signal obtained from the display terminal 40.

[0035] The multimedia processing chip 30 is used to adjust the data of the target electrical signal, which can include the first electrical signal and the third electrical signal. When the input to the multimedia processing chip 30 is the first electrical signal, the target electrical signal is the first electrical signal. When the input to the multimedia processing chip 30 is the third electrical signal, the target electrical signal is the third electrical signal. The data adjustment includes adaptive data adjustment and / or codec operation on the input target electrical signal. In some cases, the adaptive data adjustment can be turned on or off. In some cases, the adaptive data adjustment and the codec operation can include only one of them or both. Specifically, in some cases, the third electrical signal obtained by the multimedia processing chip 30 needs to be encoded into the format required by the first electrical signal. The first electrical signal obtained by the multimedia processing chip 30 needs to be decoded into a format that can be played on the display terminal 40. The adaptive data adjustment includes but is not limited to adaptive resolution, bit depth, format and display effect adjustment.

[0036] The first electrical signal is an electrical signal sent by the opposite access device 50 and received by the bidirectional HDMI interface 11. Specifically, the first electrical signal can be a multimedia electrical signal, such as a video electrical signal, an audio electrical signal, an image electrical signal, etc., or other electrical signals, which are not limited here. The second electrical signal is an electrical signal sent by the bidirectional HDMI interface 11 to the opposite access device 50. Specifically, the second electrical signal can be a multimedia electrical signal, such as a video electrical signal, an audio electrical signal, an image electrical signal, etc., or other electrical signals, which are not limited here. The third electrical signal is an electrical signal obtained by the multimedia processing chip 30 from the display terminal 40. Specifically, the third electrical signal can be a multimedia electrical signal, such as a video electrical signal, an audio electrical signal, an image electrical signal, etc., or other electrical signals, which are not limited here. The third electrical signal needs to be processed by the multimedia processing chip 30 and then sent by the bidirectional HDMI interface 11 to the opposite access device 50, i.e., it becomes the first electrical signal.

[0037] It can be seen that the data transmission device of the embodiment of the application comprises a bidirectional interface module, a control module and a multimedia processing chip, and is electrically connected with a display terminal; wherein a first end of the bidirectional interface module is electrically connected with a first end of the control module, and a second end of the bidirectional interface module is electrically connected with a first end of the multimedia processing chip; a second end of the control module is electrically connected with a second end of the multimedia processing chip; a third end of the multimedia processing chip is electrically connected with a first end of the display terminal; the bidirectional interface module comprises a bidirectional HDMI interface, and is electrically connected with a counterpart access device through a connecting device, and is configured to receive a first electric signal of the counterpart access device or send a second electric signal to the counterpart access device; the control module is configured to control switching of a function type of the bidirectional interface module, and the function type comprises a sending function and a receiving function; the multimedia processing chip is configured to perform data adjustment on a target electric signal, and the data adjustment comprises adaptive data adjustment and / or codec operation, and the target electric signal comprises the first electric signal or a third electric signal; and the display terminal is configured to display based on the first electric signal or send the third electric signal to the multimedia processing chip. In this way, the number of occupied interfaces can be reduced, and the flexibility of media data transmission and the compatibility of access devices can be improved.

[0038] In a possible embodiment, refer to Figure 3 , Figure 3is a device structure diagram of a third data transmission device provided by the embodiment of the application. The multimedia processing chip 30 comprises a signal buffering module 31 and a signal adjusting module 32. The first end of the signal adjusting module 32 is electrically connected to the second end of the control module 20 as the second end of the multimedia processing chip 30. The second end of the signal adjusting module 32 is electrically connected to the second end of the bidirectional interface module 10 as the first end of the multimedia processing chip 30. The first end of the signal buffering module 31 is electrically connected to the third end of the signal adjusting module 32. The second end of the signal buffering module 31 is electrically connected to the first end of the display terminal 40 as the third end of the multimedia processing chip 30. The signal buffering module 31 is configured to buffer the third electric signal from the display terminal 40 and transmit the third electric signal to the signal adjusting module 32. The signal buffering module 31 is further configured to buffer the fourth electric signal from the signal adjusting module 32 and transmit the fourth electric signal to the display terminal 40. The signal adjusting module 32 is configured to perform adaptive data adjustment on the first electric signal to obtain a fifth electric signal and / or perform decoding operation on the fifth electric signal to obtain the fourth electric signal. The signal adjusting module 32 is further configured to perform encoding operation on the third electric signal to obtain a sixth electric signal and / or perform adaptive data adjustment on the sixth electric signal to obtain the second electric signal.

[0039] The signal buffering module 31 is configured to perform data buffering and buffering data retrieval. The signal buffering module 31 is electrically connected to the signal adjusting module 32 and the display terminal 40, and is configured to buffer and retrieve the third electric signal transmitted by the display terminal 40 or buffer or transmit the fourth electric signal from the signal adjusting module 32 to the display terminal 40.

[0040] The signal adjusting module 32 is further electrically connected to the control module 20 and the bidirectional interface module 10. If the signal adjusting module 32 receives the first electric signal transmitted by the bidirectional interface module 10, the signal adjusting module 32 performs adaptive data adjustment on the first electric signal to obtain a fifth electric signal and performs decoding operation on the fifth electric signal to obtain a fourth electric signal. If the signal buffering module 31 receives the third electric signal transmitted by the display terminal 40, the signal buffering module 31 buffers the third electric signal or transmits the buffered third electric signal to the signal adjusting module 32. Then, the signal adjusting module 32 performs encoding operation on the third electric signal to obtain a sixth electric signal, and then performs adaptive data adjustment on the sixth electric signal to obtain a second electric signal. The signal adjusting module 32 transmits the second electric signal to the bidirectional interface module 10, and the bidirectional interface module 10 transmits the second electric signal to the opposite side access device 50.

[0041] The fifth electric signal can be the same as or different from the first electric signal. In different use scenarios, the display terminal 40 can need to perform adaptive data adjustment on the received content to be played, that is, the first electric signal, or can not need to perform adaptive data adjustment. The fifth electric signal can need to be decoded to be converted into a format that can be played in the display terminal 40, or can not need to be decoded in some possible cases, and the format after decoding is the same. The third electric signal needs to be encoded to be converted into a format required by HDMI transmission, that is, a format required by the first electric signal, or can not need to be encoded in some possible cases, and the format after encoding is the same. The first electric signal, the second electric signal, the third electric signal, the fourth electric signal, the fifth electric signal, and the sixth electric signal are all media electric signals, which are used for transmission of media signals such as video, picture, text, and audio between the display terminal 40 and the opposite-side access device 50, and are not limited herein.

[0042] The connection between the control module 20 and the signal adjustment module 32 can be through a UART bus. The connection between the signal buffering module 31 and the signal adjustment module 32 further includes a UART bus connection, which is used for transmission of a tenth electric signal. The tenth electric signal can be used for the signal adjustment module 32 to instruct the signal buffering module 31 to prepare a buffer space, and specifically is the fourth electric signal. Alternatively, the tenth electric signal can be used for the signal adjustment module 32 to instruct the signal buffering module 31 to prepare to retrieve an electric signal to be sent from the buffer space, and specifically is the third electric signal.

[0043] It can be seen that, in the embodiment, the signal transmission is adjusted by the signal buffering module and the signal adjustment module, so that the signal transmission is more controllable, and the adaptability and compatibility of data transmission are improved.

[0044] In a possible embodiment, referring to Figure 4 , Figure 4 FIG. 7 is a device structure diagram of a fourth data transmission device provided in the embodiment of the present application. The device further includes a sensor module 60. A fourth end of the signal adjustment module 32 is electrically connected or communicatively connected to a first end of the multimedia processing chip 30 as a fourth end of the multimedia processing chip 30. The sensor module 60 is used to acquire an environmental parameter of an environment in which the display terminal 40 and / or the opposite-side access device 50 is located, and transmit the environmental parameter to the signal adjustment module 32.

[0045] The sensor module 60 can include at least one sensor, which can be a brightness sensor or the like. The sensor module 60 is electrically connected or communicatively connected to the signal adjustment module 32. The sensor module 60 is used to acquire an environmental parameter of an environment in which one or more of the display terminal 40 and the opposite-side access device 50 is located. The environmental parameter can be an environmental brightness parameter. After the sensor module 60 acquires the environmental parameter, the environmental parameter is transmitted to the signal adjustment module 32.

[0046] It can be seen that in the embodiment, the sensor module is used to acquire the environmental parameters, so that the adaptive data adjustment considers the environmental conditions, and data transmission is more intelligent and flexible.

[0047] In a possible embodiment, referring to Figure 5 , Figure 5 is a device structure diagram of a fifth data transmission device provided by the embodiment of the present application. The signal adjustment module 32 comprises a switching module 321 and an adjustment module 322. The switching module 321 comprises a channel module 3211 and a D-HUB module 3212. The first end of the switching module 321 is connected with the second end of the control module 20 as the first end of the signal adjustment module 32. The second end of the switching module 321 is connected with the second end of the bidirectional interface module 10 as the second end of the signal adjustment module 32. The third end of the switching module 321 is connected with the first end of the adjustment module 322. The second end of the adjustment module 322 is connected with the first end of the signal buffer module 31 as the third end of the signal adjustment module 32. The first end of the D-HUB module 3212 is electrically connected with the first end of the channel module 3211. The second end of the D-HUB module 3212 is electrically connected with the second end of the control module 20 as the first end of the signal adjustment module 32. The second end of the channel module 3211 is connected with the second end of the bidirectional interface module 10 as the second end of the switching module 321. The third end of the channel module 3211 is electrically connected with the first end of the adjustment module 322 as the third end of the switching module 321. The second end of the adjustment module 322 is electrically connected with the first end of the signal buffer module 31. The third end of the adjustment module 322 is electrically connected with the first end of the sensor module 60 as the fourth end of the signal adjustment module 32.

[0048] The switching module 321 is configured to switch the transmission channel. Specifically, the switching module 321 comprises a channel module 3211 and a D-HUB module 3212. The D-HUB module 3212 is configured to switch the signal of the channel module 3211. The D-HUB module 3212 is configured to configure the transmission channel of the channel module 3211 based on the adjustment signal of the control module 20 in response to the adjustment signal. The D-HUB module 3212 is a hardware component or circuit for switching or expanding the channel, which may, in some cases, be integrated into the channel module 3211 as one module.

[0049] Specifically, the adaptive data adjustment can comprise environmental adaptive adjustment. The sensor module 60 comprises an environmental brightness sensor. The adjustment module 322 can be configured to perform the environmental adaptive adjustment on the first electric signal or the sixth electric signal based on the sensing signal transmitted by the sensor module 60. The sensing signal comprises an environmental brightness signal.

[0050] Specifically, the display terminal 40 is further configured to acquire an adjustment electric signal from the outside, and the adjustment module 322 is further configured to receive the adjustment electric signal from the display terminal 40 and adaptively adjust the first electric signal or the sixth electric signal based on the adjustment electric signal.

[0051] For example, the adjustment module 322 is configured with corresponding signal receiving circuit and analysis program or processing circuit. When receiving the ambient brightness signal from the sensor module 60, if it is a digital signal, it will be parsed according to the corresponding communication protocol format, and the specific numerical value representing the light intensity will be extracted; if it is an analog signal, it will be converted into a digital signal through an analog-to-digital conversion circuit, and subsequent numerical value extraction and other processing will be performed, and finally a quantized value reflecting the current ambient light intensity will be obtained, for example, a specific brightness value in lux. Set the brightness threshold range, and the adjustment module 322 is internally preconfigured with multiple brightness threshold ranges and corresponding adjustment strategies. For example, the low brightness range (0-50 lux) corresponds to a dark environment, such as a room with no lighting or only weak light at night. The medium brightness range (50-500 lux) covers the common situation of general indoor natural lighting or a small amount of artificial lighting, such as a classroom with curtains drawn during the day. The high brightness range (500 lux and above) represents an environment with sufficient light, such as a room with direct sunlight during the day or an outdoor scene with strong light. These threshold ranges can be flexibly adjusted and subdivided according to the actual application scenario and the demand for multimedia display effect, which is not limited here. Then determine the adjustment strategy, for each brightness threshold range, determine the corresponding parameter electric signal adjustment strategy, which can include video brightness parameter electric signal or color saturation electric signal, etc., which is not limited here. In the low brightness range (0-50 lux): for the video brightness parameter electric signal, the strategy may be to increase its amplitude to increase the overall brightness of the video picture, so that the multimedia content is still clear and visible in a dark environment. Specifically, the electric signal amplitude can be adjusted by a certain percentage (such as increasing the original amplitude by 30%) through a specific algorithm to increase the video brightness. For the color saturation electric signal, appropriately increase its amplitude to enhance the brightness of the color, compensate for the problem of insufficient color brightness due to dark light, for example, adjust the electric signal by a certain coefficient (such as increasing the original amplitude by 20%). In the medium brightness range (50-500 lux): the video brightness is maintained at a relatively stable standard amplitude to ensure that the video picture brightness is moderate and conforms to normal viewing habits, with only minor dynamic adjustments (such as adjusting the picture average brightness and the preset standard brightness within a ±5% amplitude range). The color saturation electric signal also remains at a normal level, and only when the picture appears to be off-color, etc., a small amount of color correction adjustment is made. In the high brightness range (500 lux and above): the video brightness parameter electric signal may need to be appropriately reduced in amplitude to avoid the video picture appearing too bright and white due to the strong ambient light, losing details, which can be adjusted by a certain percentage (such as reducing the original amplitude by 20%). The color saturation electric signal also needs to be slightly adjusted in amplitude to prevent the color from being too bright and causing visual fatigue, which can be adjusted by a certain coefficient (such as reducing the original amplitude by 15%).In the process of adjusting the electrical signal, the adjustment module 322 continuously monitors the effect of the adjustment. On the one hand, by real-time sampling analysis of the multimedia information to be transmitted by HDMI (for example, extracting a frame of video picture every certain time interval for brightness, color and other parameter analysis), it is checked whether the expected adaptive adjustment effect is achieved; on the other hand, user feedback can also be combined, for example, the user can feed back through a remote control device or the display terminal 40 whether the picture is clear, whether the color is appropriate and other signals, and the adjustment strategy is manually adjusted and optimized. If it is found that the adjusted multimedia information still does not meet the best viewing effect under the current environment, the adjustment module 322 will timely correct the adjustment strategy, and adjust the electrical signal again until the multimedia information presents a relatively ideal display effect under the current light environment.

[0052] When the adjustment module 322 receives the signal of the first format transmitted by the signal buffering module 31, the signal of the first format includes the third electrical signal, the first format includes a first video format and / or a first audio format, the adjustment module 322 is configured to encode the data of the first format into a signal of a second format, and send the signal of the second format to the bidirectional HDMI interface 11, the second format includes a second video format and / or a second audio format, the signal of the second format includes the sixth electrical signal; when the adjustment module 322 receives the signal of the second format transmitted by the bidirectional HDMI interface 11, the signal of the second format includes the fifth electrical signal, the adjustment module 322 is configured to decode the signal of the second format into the signal of the first format, and send the signal of the first format to the signal buffering module 31, the signal of the first format includes the fourth electrical signal.

[0053] When the signal of the first format is a video signal, the first format can be a first video format, and the second format can be a second video format. Specifically, the first video format can be an RGB format, and the second video format can be a TMDS format.

[0054] When the signal of the first format is an audio signal, the first format can be a first audio format, and the second format can be a second audio format. Specifically, the first audio format can be a FLAC format, and the second audio format can be an MP3 format, an AAC format, an OGG format, a WMA format, etc., which are not limited herein.

[0055] In some possible cases, the signal in the first format can also be an image signal, the first format can be a first image format, and the second format can be a second image format. Specifically, the first image format can be a JPEG format, a PNG format, a GIF format, a BMP format, a TIFF format, an SVG format, or the like, and the second image format can be a JPEG format, a PNG format, a GIF format, a BMP format, a TIFF format, an SVG format, or the like, which are not limited herein.

[0056] When the data is transmitted to the opposite access device 50 through the bidirectional HDMI interface 11, the signal stored, retrieved or stored in the buffer space is in the first format, that is, the third electric signal obtained by the signal buffer module 31 from the display terminal 40 and transmitted to the adjustment module 322, and the second format signal obtained after the encoding operation of the adjustment module 322 can be the sixth electric signal, and the second electric signal obtained based on the sixth electric signal; when the data is received by the opposite access device 50 through the bidirectional HDMI interface 11, the signal in the second format includes the first electric signal received from the bidirectional HDMI interface 11 and transmitted to the adjustment module 322 and the fifth electric signal based on the first electric signal and the adjustment of the adjustment module 322, and the electric signal in the first format includes the fourth electric signal after the decoding operation of the adjustment module 322 on the fifth electric signal.

[0057] It can be seen that, in the embodiment, by performing encoding and decoding operations on the transmitted signal, adaptively adjusting the data, the number of occupied interfaces can be reduced, and the flexibility of media data transmission and the compatibility of the access device can be improved.

[0058] In a possible embodiment, please refer to Figure 6 , Figure 6is a device structure diagram of a sixth data transmission device provided by the embodiment of the present application, the bidirectional interface module 10 further comprises an anti-interference module 12, the anti-interference module 12 is used for filtering processing the seventh electric signal obtained by the bidirectional HDMI interface 11;The first end of the anti-interference module 12 is connected with the first end of the bidirectional HDMI interface 11 through a data channel, the data channel comprises a DDC channel, the data channel is connected with the first end of the bidirectional HDMI interface 11 through at least one first interface pin, and the first end of the anti-interference module 12 is connected with the data channel through at least one second interface pin;The second end of the anti-interference module 12 is used as the first end of the bidirectional interface module 10 and is connected with the first end of the control module 20 through the data channel;The second end of the bidirectional HDMI interface 11 is used as the second end of the bidirectional interface module 10 and is connected with the second end of the signal adjustment module 32, and then is connected with the second end of the switching module 321;The control module 20 is used for judging the device type of the opposite side access equipment 50 by detecting the eighth electric signal after the connection device connected with the opposite side access equipment 50 is inserted into the bidirectional HDMI interface 11, the eighth electric signal is a signal transmitted to the control module 20 after the seventh electric signal is processed by the anti-interference module 12, and the eighth electric signal comprises device type information of the opposite side access equipment 50;The control module 20 is further used for controlling the switching function type of the bidirectional HDMI interface 11 based on the device type, the device type comprises a sending device and a receiving device, if the device type is the sending device, the control module 20 is used for controlling the bidirectional HDMI interface 11 to switch to the sending function, if the device type is the receiving device, the control module 20 is used for controlling the bidirectional HDMI interface 11 to switch to the receiving function;The control module 20 is further used for sending an adjustment signal to the D-HUB module 3212 based on the device type, the adjustment signal is used for indicating the D-HUB module 3212 to configure the transmission channel of the channel module 3211, the transmission channel comprises a sending channel and a receiving channel, the sending channel is used for sending the second electric signal, and the receiving channel is used for receiving the first electric signal transmitted by the second end of the bidirectional HDMI interface 11 to the channel module 3211.

[0059] The seventh electrical signal includes at least one of an EDID signal and an HPD signal, the HPD signal is used to indicate whether the opposite side access device 50 is connected, if the HPD indicates that the opposite side access device 50 is connected, the EDID signal is obtained, the EDID signal includes the device information of the opposite side access device 50, and is mainly used to describe the capability and performance parameters of the display, such as supported resolution, refresh rate, color setting and the like. The eighth electrical signal is an electrical signal obtained by filtering the seventh electrical signal, and includes at least one of the filtered EDID signal and the HPD signal.

[0060] Specifically, when the external device is connected to the HDMI interface, the control module 20 judges the specific information of the opposite side access device 50 by reading the EDID signal, and sends the information to the signal adjustment module 32, specifically to the adjustment module 322 and to the switching module 321, the switching module 321 adjusts the signal channel accordingly, and the adjustment module 322 adjusts the adaptive data accordingly.

[0061] In a possible embodiment, referring to Figure 6 , the fourth end of the adjustment module 322 is connected with the first end of the signal adjustment module 32, and further connected with the second end of the control module 20, the adaptive data adjustment further includes parameter adaptive adjustment, the eighth electrical signal further includes the device information of the opposite side access device 50, and the control module 20 is further configured to send the eighth electrical signal to the adjustment module 322, so that the adjustment module 322 performs parameter adaptive adjustment based on the eighth electrical signal, and the parameter adaptive adjustment includes at least one of resolution adjustment, bit depth adjustment and format conversion adjustment.

[0062] For example, the control module 20 converts the eighth signal into a corresponding signal and transmits it to the adjustment module 322, the adjustment module 322 extracts the resolution value based on the EDID and stores it in the horizontal and vertical resolution variables respectively, and extracts the bit depth information and stores it in the bit depth variable. Then, resolution adaptation is performed, the original resolution of the multimedia information is compared with the resolution supported by the opposite side device, if the source resolution is high, a scaling algorithm such as bilinear interpolation is selected to prepare to reduce the picture; if the source resolution is low and the capacity of the opposite side device needs to be utilized, a suitable amplification algorithm is considered. The original bit depth of the multimedia information is compared with the bit depth supported by the opposite side device. If the source bit depth is high, a quantization method such as truncation or rounding is used to reduce the bit depth; if they are equal, no adjustment is made. After adaptation, the selected scaling algorithm program can be called to re-sample and calculate each pixel of each frame of the multimedia information, generate a new image frame with adapted resolution to replace the original frame, and update the resolution parameter variable. Then, bit depth adjustment is performed, color data is processed according to the quantization rule, such as truncation or rounding operation, and the color data is updated to the multimedia information after verification.

[0063] For example, the control module 20 transmits the eighth signal to the adjustment module 322 after converting the eighth signal into a corresponding signal, the sensor module 60 senses the intensity of ambient light and transmits the intensity of ambient light to the adjustment module 322, and the adjustment module 322 analyzes the signal to obtain a specific light intensity value and device information such as resolution and bit depth of the opposite side access device 50. Based on the above-mentioned comprehensive regulation of the regulation strategy of the control module 20 for the environment and the regulation strategy for the device information, the light intensity strategy is used to perform numerical increase and decrease operations on the corresponding parameters (such as brightness) of the multimedia information; the device information strategy is used to perform scaling algorithm processing on the resolution and quantization method processing on the bit depth. Alternatively, based on the weight algorithm, the two aspects of parameters are comprehensively regulated. The adjusted data is updated to the corresponding region of the multimedia information, and the HDMI transmission is prepared.

[0064] It should be noted that, in the above example, it is also feasible to process the environmental data and data parameters of the display terminal 40 in reverse, and corresponding connection lines are constructed to realize the transmission of signals, and specific implementation is not described here.

[0065] As can be seen, in the embodiment, the control module can perform multiple types of adaptive data adjustment, which can reduce the number of occupied interfaces and improve the flexibility of media data transmission and the compatibility of access devices.

[0066] In a possible embodiment, the second end of the control module 20 is electrically connected to the second end of the display terminal 40, the display terminal 40 is further configured to obtain a ninth electrical signal and transmit the ninth electrical signal to the control module 20, and the control module 20 is further configured to control the bidirectional HDMI interface 11 of the bidirectional interface module 10 to switch the function type based on the ninth electrical signal. The ninth electrical signal includes switching to a sending function or switching to a receiving function.

[0067] The user can input an instruction to control the working mode of the HDMI interface through the display terminal 40. Specifically, the input instruction can include operation control or voice control. The generated control instruction is the ninth electrical signal, the display terminal 40 transmits the ninth electrical signal to the control module 20, and the control module 20 performs adjustment on the above-mentioned channel, interface function, and other aspects.

[0068] As can be seen, in the embodiment, the control module can perform interface transmission function switching control based on external instructions and recognition instructions, which can reduce the number of occupied interfaces and improve the flexibility of media data transmission and the compatibility of access devices.

[0069] For example, when the opposite side access device 50 is connected to the bidirectional HDMI interface 11, the control module 20 includes the HPD signal and the EDID signal through the eighth electrical signal of the bidirectional HDMI interface 11. The HPD signal detects the insertion or removal of the opposite side access device 50, and then judges the type of the connected device (sending device or receiving device) through the transmitted EDID. According to the identification result, the control module 20 automatically switches the working mode of the bidirectional HDMI interface 11. If it is a sending device, the interface is switched to receiving mode; if it is a receiving device, the interface is switched to transmitting mode. And report the identification result to the switching module 321 through the UART bus or electrical connection. The switching module 321 switches the signal channel of the channel module 3211 through the internal D-HUB module 3212. If it is a sending device, the data channel is switched to a receiving channel. If it is a receiving device, the data channel is switched to an output channel. At the same time, the EDID contained in the eighth electrical signal is transmitted to the adjustment module 322 for parameter adaptive adjustment. The resolution, bit depth, format conversion and processing of the input or output signal are adjusted to adapt to different output devices. At the same time, if the sensor module 60 is connected, the ambient light intensity is obtained for environmental adaptive adjustment, or parameter adaptive adjustment and environmental adaptive adjustment are adjusted cooperatively. When the switching module 321 is configured as an output channel, the next step will report the video data stream information ready for receiving to the signal buffer module 31 through the UART signal. The signal buffer module 31 sends the signal in the buffer, i.e. the third electrical signal, to the adjustment module 322 in the first format. The adjustment module 322 receives the third electrical signal, encodes it into the second format to obtain the sixth electrical signal, and performs adaptive adjustment to obtain the second electrical signal. The second electrical signal is output to the bidirectional HDMI interface 11 and then transmitted to the opposite side access device 50. If it is a receiving device, the switching module 321 is configured as a receiving channel, which will transmit the first electrical signal received by the bidirectional HDMI interface 11 to the channel module 3211 and then to the adjustment module 322. The adjustment module 322 processes the first electrical signal to obtain the fifth electrical signal, then decodes the second format of the fifth electrical signal into the first format of the fourth electrical signal. The next step is to report the video ready to be sent to the signal buffer module 31 through the UART signal or electrical connection. The signal buffer module 31 is ready to receive the first format of the fourth electrical signal. And output the received fourth electrical signal to the display terminal 40 for display; the user can also manually select the working mode of the bidirectional HDMI interface 11 through the user interface of the display terminal 40 or remote control, etc. to adapt to specific use scenarios.

[0070] It should be noted that the data transmission device and the display terminal 40 can be integrated into an electronic device, such as a smart phone (such as an Android phone, an iOS phone, a Windows Phone, etc.), a tablet computer, a palm computer, a driving recorder, a vehicle-mounted electronic device, a server, a notebook computer, a mobile Internet device (MID), or a wearable electronic device (such as a smart watch, a Bluetooth headset), and the like. The above are only examples and are not exhaustive, and include but are not limited to the above electronic devices.

[0071] It should be noted that for the foregoing method embodiments, in order to simply describe, they are all expressed as a combination of a series of actions, but those skilled in the art should know that the present application is not limited by the order of the actions described, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0072] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0073] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the above modules is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of modules or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical or other forms.

[0074] The above describes the embodiments of the present application in detail, and the principle and implementation mode of the present application are described by applying specific examples. The above embodiment description is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above, the content of the specification should not be understood as a limitation of the present application.

[0075] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application have been described by applying specific examples in this paper, the above embodiment explanation is only used for helping understanding the method of the application and its core idea; at the same time, for the general technical personnel in the art, according to the idea of the application, the specific implementation mode and application range will have the change, and the above is described, the content of the specification should not be understood as the limitation of the application.

Claims

1. A data transmission apparatus, characterized by comprising: The data transmission device comprises a bidirectional interface module, a control module and a multimedia processing chip, and is electrically connected with a display terminal, a first end of the bidirectional interface module is electrically connected with a first end of the control module, and a second end of the bidirectional interface module is electrically connected with a first end of the multimedia processing chip; a second end of the control module is electrically connected with a second end of the multimedia processing chip; and a third end of the multimedia processing chip is electrically connected with a first end of the display terminal; the bidirectional interface module comprises a bidirectional HDMI interface, and is electrically connected with a contralateral access device through a connecting device and used for receiving a first electric signal of the contralateral access device or sending a second electric signal to the contralateral access device; the control module is used for controlling switching of a function type of the bidirectional interface module, the function type comprising a sending function and a receiving function; the multimedia processing chip is used for performing data adjustment on a target electric signal, the data adjustment comprising adaptive data adjustment and / or coding and decoding operation, the target electric signal comprising the first electric signal or a third electric signal; and the display terminal is used for displaying based on the first electric signal or sending the third electric signal to the multimedia processing chip.

2. The apparatus of claim 1, wherein, the multimedia processing chip comprises a signal buffering module and a signal adjustment module, a first end of the signal adjustment module is electrically connected with a second end of the control module as a second end of the multimedia processing chip, a second end of the signal adjustment module is electrically connected with a second end of the bidirectional interface module as a first end of the multimedia processing chip, a first end of the signal buffering module is electrically connected with a third end of the signal adjustment module, and a second end of the signal buffering module is electrically connected with a first end of the display terminal as a third end of the multimedia processing chip; the signal buffering module is used for buffering the third electric signal from the display terminal and transmitting the third electric signal to the signal adjustment module, and is also used for buffering a fourth electric signal from the signal adjustment module and transmitting the fourth electric signal to the display terminal; the signal adjustment module is used for performing adaptive data adjustment on the first electric signal to obtain a fifth electric signal, and / or performing decoding operation on the fifth electric signal to obtain the fourth electric signal; and is also used for performing coding operation on the third electric signal to obtain a sixth electric signal, and / or performing the adaptive data adjustment on the sixth electric signal to obtain the second electric signal.

3. The apparatus of claim 2, wherein, the device further comprises a sensor module, a fourth end of the signal adjustment module is electrically connected or communicatively connected with a first end of the sensor module as a fourth end of the multimedia processing chip; and the sensor module is used for acquiring environmental parameters of an environment where the display terminal and / or the contralateral access device is located and transmitting the environmental parameters to the signal adjustment module.

4. The apparatus of claim 3, wherein, The signal adjustment module comprises a switching module and an adjustment module, the switching module comprises a channel module and a D-HUB module, a first end of the switching module is connected with a second end of the control module as a first end of the signal adjustment module, a second end of the switching module is connected with a second end of the bidirectional interface module as a second end of the signal adjustment module, a third end of the switching module is connected with a first end of the adjustment module, a second end of the adjustment module is connected with a first end of the signal cache module as a third end of the signal adjustment module; a first end of the D-HUB module is electrically connected with a first end of the channel module, a second end of the D-HUB module is electrically connected with the second end of the control module as the first end of the signal adjustment module; a second end of the channel module is connected with the second end of the bidirectional interface module as the second end of the switching module, a third end of the channel module is electrically connected with the first end of the adjustment module as the third end of the switching module; the second end of the adjustment module is electrically connected with the first end of the signal cache module; a third end of the adjustment module is electrically connected with a first end of the sensor module as a fourth end of the signal adjustment module.

5. The apparatus of claim 4, wherein, The adaptive data adjustment comprises environmental adaptive adjustment, the sensor module comprises an environmental brightness sensor, and the adjustment module is configured to perform the environmental adaptive adjustment on the first electric signal or the sixth electric signal based on a sensing signal transmitted by the sensor module, the sensing signal comprising an environmental brightness signal.

6. The apparatus of claim 5, wherein, The display terminal is further configured to obtain an adjustment electric signal from the outside world, and the adjustment module is further configured to receive the adjustment electric signal from the display terminal and perform adaptive adjustment on the first electric signal or the sixth electric signal based on the adjustment electric signal.

7. The apparatus of any of claims 4-6, wherein, when the adjustment module receives a signal of a first format transmitted by the signal cache module, the signal of the first format comprising the third electric signal, the first format comprising a first video format and / or a first audio format, the adjustment module is configured to encode the signal of the first format into a signal of a second format and send the signal of the second format to the bidirectional HDMI interface, the second format comprising a second video format and / or a second audio format, the signal of the second format comprising the sixth electric signal; when the adjustment module receives the signal of the second format transmitted by the bidirectional HDMI interface, the signal of the second format comprising the fifth electric signal, the adjustment module is configured to decode the signal of the second format into the signal of the first format and send the signal of the first format to the signal cache module, the signal of the first format comprising the fourth electric signal.

8. The device of any one of claims 4-6, wherein, The bidirectional interface module further comprises an anti-interference module, the anti-interference module being configured to perform filtering processing on a seventh electric signal obtained by the bidirectional HDMI interface. The first end of the anti-interference module is connected with the first end of the bidirectional HDMI interface through a data channel, the data channel includes a DDC channel, the data channel is connected with the first end of the bidirectional HDMI interface through at least one first interface pin, and the first end of the anti-interference module is connected with the data channel through at least one second interface pin; the second end of the anti-interference module is connected with the first end of the control module as the first end of the bidirectional interface module through the data channel; the second end of the bidirectional HDMI interface is connected with the second end of the signal adjustment module as the second end of the bidirectional interface module, and then is connected to the second end of the switching module; The control module is used for judging the device type of the opposite access device by detecting an eighth electric signal when the connecting device connected with the opposite access device is inserted into the bidirectional HDMI interface, the eighth electric signal is a signal transmitted to the control module after the seventh electric signal is processed by the anti-interference module, and the eighth electric signal includes device type information of the opposite access device; The control module is also used for controlling the switching function type of the bidirectional HDMI interface based on the device type, the device type includes a sending device and a receiving device, if the device type is the sending device, the control module is used for controlling the bidirectional HDMI interface to switch to the sending function, and if the device type is the receiving device, the control module is used for controlling the bidirectional HDMI interface to switch to the receiving function; The control module is also used for sending an adjustment signal to the D-HUB module based on the device type, the adjustment signal is used for instructing the D-HUB module to configure a transmission channel of the channel module, the transmission channel includes a sending channel and a receiving channel, the sending channel is used for sending the second electric signal, and the receiving channel is used for receiving the first electric signal transmitted by the second end of the bidirectional HDMI interface to the channel module.

9. The apparatus of claim 8, wherein, The second end of the control module is electrically connected with the second end of the display terminal, the display terminal is also used for acquiring a ninth electric signal and sending the ninth electric signal to the control module, and the control module is also used for controlling the bidirectional HDMI interface of the bidirectional interface module to switch the function type based on the ninth electric signal, the ninth electric signal includes switching to the sending function or switching to the receiving function.

10. The apparatus of claim 8, wherein, The fourth end of the adjustment module is connected with the first end of the signal adjustment module, and then is connected with the second end of the control module, the adaptive data adjustment also includes parameter adaptive adjustment, the eighth electric signal also includes device information of the opposite access device, and the control module is also used for sending the eighth electric signal to the adjustment module, so that the adjustment module performs parameter adaptive adjustment based on the eighth electric signal, and the parameter adaptive adjustment includes at least one of resolution adjustment, bit depth adjustment and format conversion adjustment.

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