An audio / video extension switcher

Abstract

This utility model discloses an audio / video extension switcher, including a remote transmitter, a local receiver, and an extension transmission line. The remote transmitter is located at a remote end, far from the user, while the local receiver is located near the user. The extension transmission line connects the remote transmitter and the local receiver, allowing for long-distance interaction between the transmitter and receiver ports. This utility model's audio / video extension switcher separates the remote transmitter and the local receiver, allowing the user to interact only with the local receiver. This design reduces the size and number of lines on the local receiver, providing a compact and simple user experience. Furthermore, the extension transmission line connects the remote transmitter and the local receiver, extending the signal transmission distance and facilitating adaptation to more diverse and complex usage scenarios.

Description

Technical Field

[0001] This utility model relates to the field of audio and video transmission technology, and in particular to an audio and video switching extender. Background Technology

[0002] Audio / video switchers are used to receive and analyze multiple input signals, independently switch them to different output channels, and control their playback. Existing audio / video switchers are often manufactured as integrated desktop devices, which are bulky, occupy significant desktop space, and have multiple input and output lines converge at the desktop location, resulting in messy and difficult-to-manage wiring. Utility Model Content

[0003] The main purpose of this utility model is to provide a split-type switcher that can bring users a user experience with a small device size and simple wiring.

[0004] To achieve the above objectives, this utility model proposes an audio / video extension switcher, comprising:

[0005] The remote transmitter, located at a distance from the user, has a transmission analysis module, a transmission port, at least one audio input port, and at least one video input port; each audio input port is connected to the transmission analysis module; each video input port is connected to the transmission analysis module, and the transmission analysis module is connected to the transmission port;

[0006] The on-site receiver, located near the user, has a receiving port, a receiving and parsing module, at least one audio output port, and at least one video output port. The receiving port is connected to the receiving and parsing module, which is connected to each audio output port. The audio and video output ports are connected to an external audio playback device to play the corresponding audio content. The receiving and parsing module is also connected to each video output port, which is connected to an external video playback device to play the corresponding video content.

[0007] In addition, the transmission line is extended, which is set between the remote transmitter and the field receiver and connects the two. The transmitter port and the receiver port interact over long distances through the transmission line.

[0008] Optionally, the audio input port is a Type-C port, and external audio signals are connected through the audio input port.

[0009] Optionally, the video input port is an HDMI port, through which external video signals are connected.

[0010] Optionally, the transmission parsing module includes a first audio / video processing unit and a second audio / video processing unit; the first audio / video processing unit is used to receive and mix audio signals and video signals, and the second audio / video processing unit is used to convert the mixed audio signals and video signals into network signals that can be transmitted over long distances; the first audio / video processing unit is connected to the audio input port and the video input port respectively, and the first audio / video processing unit is connected to the second audio / video processing unit. The first audio / video processing unit includes a first audio / video processing chip and its peripheral circuits, and the model of the first audio / video processing chip is GSV6712; the second audio / video processing unit is connected to the transmission port; the second audio / video processing unit includes a second audio / video processing chip and its peripheral circuits, and the model of the second audio / video processing chip is GVS5100.

[0011] Optionally, both the transmitting and receiving ports are RJ45 ports.

[0012] Optionally, the transmission analysis module also includes a power supply unit and a transmission logic control unit; the power supply unit is used to provide one or more operating power sources of 1.2V, 3.3V, 5V, 12V or 24V, and the power supply unit is connected to the first audio and video processing unit, the second audio and video processing unit and the transmission logic control unit respectively; the transmission logic control unit is used to monitor the circuit operation and send corresponding control signals; the transmission logic control unit includes a main control chip and its peripheral circuits, the main control chip model is GD32F303CCT, the main control chip is connected to the first audio and video processing chip and the second audio and video processing chip respectively, so as to control the working process of the first audio and video processing chip and the second audio and video processing chip respectively.

[0013] Optionally, the transmission analysis module further includes a device signal transmission unit; the device signal transmission unit includes an RX circuit, which includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first transistor, and a first diode; one end of the first resistor is connected to the transmission port, and the other end of the first resistor is connected to the collector of the first transistor; one end of the second resistor is connected to the common terminal of the first resistor and the first transistor, and the other end of the second resistor is grounded; one end of the third resistor is connected to the power supply unit, and the other end of the third resistor is connected to the collector of the first transistor; the transmitter of the first transistor is grounded, the base of the first transistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the anode of the first diode; the cathode of the first diode is connected to the main control chip; one end of the fifth resistor is connected to the power supply unit, and the other end of the fifth resistor is connected to the common terminal of the fourth resistor and the first diode;

[0014] The equipment signal transmission unit also includes a TX circuit; the TX circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second transistor, a second diode, and a first operational amplifier; one end of the sixth resistor is connected to the main control chip, and the other end of the sixth resistor is connected to the collector of the second transistor; one end of the seventh resistor is connected to the power supply unit, and the other end of the seventh resistor is connected to the common terminal of the sixth resistor and the second transistor; the emitter of the second transistor is grounded, the base of the second transistor is connected to one end of the eighth resistor, the other end of the eighth resistor is connected to the cathode of the second diode, and the anode of the second diode is connected to the output terminal of the first operational amplifier; one end of the ninth resistor is connected to the power supply unit, and the other end of the ninth resistor is connected to the common terminal of the second diode and the first operational amplifier; the non-inverting input terminal of the first operational amplifier is connected to the transmit port, and the inverting input terminal of the first operational amplifier is connected to the power supply unit. The equipment signal transmission unit is used to resolve and transmit IR signals and power-on equipment mutual recognition signals between the remote transmitter and the field receiver.

[0015] Optionally, the extended transmission line can be constructed using CAT5E and / or CAT6 cables.

[0016] Optionally, the field receiver includes a receiving audio and video processing unit, which is used to receive and parse audio and video signals. The receiving audio and video processing unit includes a receiving audio and video processing chip and its peripheral circuits. The receiving audio and video processing chip is model GVS5100. The receiving audio and video processing chip is connected to the receiving port and is also connected to each audio output port and each video output port.

[0017] The field receiver also includes a receiving logic control unit; the receiving logic control unit includes a receiving logic chip and an IR receiving unit; the receiving logic control unit includes a receiving logic chip, the model of which is GD32F303CCT, and the receiving logic chip is connected to the receiving audio and video processing chip and the receiving port respectively; the IR receiving unit is connected to the receiving port, and the IR receiving unit is also connected to the receiving logic chip, and the IR receiving unit is used to transmit and receive IR signals transmitted between the remote transmitter and the field receiver.

[0018] The beneficial effects of this utility model are as follows: The audio and video extension switcher provided by this utility model is equipped with a remote transmitter and a field receiver respectively. Users only need to contact the field receiver that is close to it. This setting reduces the size of the field receiver device and the number of lines, giving users a compact device and simple wiring experience. On the other hand, since an extension transmission line is used to connect the remote transmitter and the field receiver, the remote transmitter can be set at a greater distance from the field receiver, and the signal transmission distance is extended, which is conducive to adapting to more types and more complex usage scenarios. Attached Figure Description

[0019] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein:

[0020] Figure 1 This is a first partial circuit diagram of the audio / video extension switcher provided in a specific implementation.

[0021] Figure 2 This is a second partial circuit diagram of the audio / video extension switcher provided in a specific implementation.

[0022] Figure 3 The circuit diagram shows the second audio / video processing chip and its peripheral circuits in the audio / video extension switcher provided in the specific implementation.

[0023] Figure 4 This is a circuit diagram of the RX circuit in the audio / video extension switcher provided in a specific implementation.

[0024] Figure 5 The circuit diagram of the TX circuit in the audio / video extension switcher provided in the specific implementation is shown.

[0025] Figure 6 This is a third partial circuit diagram of the audio / video extension switcher provided in a specific implementation.

[0026] Figure 7 This is a fourth partial circuit diagram of the audio / video extension switcher provided in a specific implementation.

[0027] Figure 8 This is a third partial circuit diagram of the audio / video extension switcher provided in a specific implementation. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain this utility model and do not constitute a limitation on this utility model.

[0029] Please see Figure 1-2 6-8, In this specific embodiment, an audio / video extension switcher is provided, including a remote transmitter, a field receiver, and an extension transmission line.

[0030] The remote transmitter is located at a distance from the user and includes a transmission analysis module, a transmission port, at least one audio input port, and at least one video input port. Each audio input port is connected to the transmission analysis module, and each video input port is connected to the transmission analysis module, which in turn is connected to the transmission port. The on-site receiver is located near the user and includes a receiver port, a receiver analysis module, at least one audio output port, and at least one video output port. The receiver port is connected to the receiver analysis module, which is connected to each audio output port. The audio and video output ports are connected to an external audio playback device to play the corresponding audio content. The receiver analysis module is also connected to each video output port, which is connected to an external video playback device to play the corresponding video content. An extended transmission line is installed between the remote transmitter and the on-site receiver, connecting the two. The transmission port and the receiver port interact over a long distance via the transmission line. The audio / video extension switcher provided in this specific embodiment has both audio / video switching and extension functions. In practical applications, technicians can insert or embed the remote transmitter into the wall and place the field receiver on a desktop, podium, or shelf around the user. The extension transmission line runs out from the wall, with one end connected to the remote transmitter and the other end connected to the field receiver. This separate architecture of the remote transmitter and field receiver reasonably distinguishes different functional modules, helping to reduce the size of the field receiver placed around the user. Furthermore, since both the audio and video input ports are located on the remote transmitter side, external audio signal cables and external video signal cables will also be connected to the remote transmitter side, eliminating the need for numerous and complex wiring connections on the field receiver side. The media signal source and the field receiver will provide users with a compact structure and indirect wiring experience. In addition, by using extended transmission lines to connect the remote transmitter and the field receiver, the transmission distance of information streams, including audio signals, video signals, switching control signals, and playback control signals, is extended. Technicians can place the remote transmitter in the same space close to the field receiver or in another space far away from the field receiver. Technicians can choose one remote transmitter to one field receiver in a one-to-one mode or one remote transmitter to multiple field receivers in a one-to-multiple mode to implement this solution, depending on the specific situation. The longer transmission distance helps to cover a larger area of ​​application scenarios, has a wider range of applications, and is also more conducive to later line / port management and maintenance.

[0031] Please see Figure 1-2 In this specific embodiment, the audio input port is a Type-C port, and external audio signals are connected through the audio input port. The video input port is an HDMI port, and external video signals are connected through the video input port.

[0032] Please see Figure 1-2In this specific embodiment, the transmission and analysis module includes a first audio / video processing unit and a second audio / video processing unit. The first audio / video processing unit is used to receive and mix audio signals and video signals, and the second audio / video processing unit is used to convert the mixed audio signals and video signals into network signals that can be transmitted over long distances. The first audio / video processing unit is connected to the audio input port and the video input port, respectively, and is connected to the second audio / video processing unit. The first audio / video processing unit includes a first audio / video processing chip and its peripheral circuits. The model of the first audio / video processing chip is GSV6712. The first audio / video processing chip is mainly used to receive and mix audio and video signals. As a high-performance, low-power hybrid switcher chip, GSV6712 supports HDMI 2.0 video signals, DP1.4 fast charging protocol, and Type-C audio signals. When applied to this specific embodiment, it can receive multiple external audio signals accessed through the audio input port, multiple external video signals accessed through the video input port, and control signals such as IR signals or RS232 signals, and mix them to form an HDMI 2.0 signal output.

[0033] Please see Figure 3 The second audio / video processing unit includes a second audio / video processing chip U1 and its peripheral circuitry. The second audio / video processing chip U1 is a GVS5100. The second audio / video processing chip U1 is mainly used to receive the HDMI 2.0 signal output from the first audio / video processing chip and convert it into a network signal for long-distance transmission. The GVS5100, as a high-performance extender chip, supports HDMI 2.0 signals on its input side and is backward compatible with HDMI 1.4 signals. It can convert the UHD signal on the input side into a network signal for transmission over a network line. The GVS5100 supports cascading. In this specific embodiment, it is used as the core chip of the second audio / video processing unit. It can cooperate with the preceding GSV6712 to sequentially mix and convert external audio signals, external video signals, and external control signals into network signals, which are then transmitted through the connection between the second audio / video processing unit and the transmitting port. Since both GSV6712 and GVS5100 have the advantages of high performance, small size and good compatibility, applying them to the technical solution provided in this specific embodiment will further help the remote transmitter reduce its device size and realize its circuit functions with a simpler circuit architecture and lower circuit cost.

[0034] Please see Figure 1-2In this specific embodiment, the transmission analysis module further includes a power supply unit and a transmission logic control unit. The power supply unit is used to provide one or more operating power sources of 1.2V, 3.3V, 5V, 12V, or 24V. The power supply unit is connected to the first audio / video processing unit, the second audio / video processing unit, and the transmission logic control unit. The transmission logic control unit is used to monitor the circuit operation and issue corresponding control signals. The transmission logic control unit includes a main control chip and its peripheral circuits. The main control chip is model GD32F303CCT. The main control chip is connected to the first audio / video processing chip and the second audio / video processing chip to control the working process of the first audio / video processing chip and the second audio / video processing chip, respectively.

[0035] Please see Figure 2 , 4-5. In this specific embodiment, the transmission parsing module further includes a device signal transmission unit IR_IN; the device signal transmission unit IR_IN includes an RX circuit and a TX circuit. The RX circuit includes a first resistor R26, a second resistor R22, a third resistor R35, a fourth resistor R27, a fifth resistor R25, a first transistor Q1, and a first diode D7; one end of the first resistor R26 is connected to the RJ45_IR-RX pin of the transmission port, and the other end of the first resistor R26 is connected to the collector of the first transistor Q1; one end of the second resistor R22 is connected to the common terminal of the first resistor R26 and the first transistor Q1, and the other end of the second resistor R22 is grounded; the third resistor R35... One end of the third resistor R35 is connected to the power supply unit, and the other end of the third resistor R35 is connected to the collector of the first transistor Q1. The transmitter of the first transistor Q1 is grounded, and the base of the first transistor Q1 is connected to one end of the fourth resistor R27. The other end of the fourth resistor R27 is connected to the anode of the first diode BAT54A. The cathode of the first diode BAT54A is connected to the MCU_2U_TX pin of the main control chip. One end of the fifth resistor R26 is connected to the power supply unit, and the other end of the fifth resistor R26 is connected to the common terminal of the fourth resistor R27 and the first diode D7. The TX circuit includes the sixth resistor R68, the seventh resistor R69, the eighth resistor R67, the ninth resistor R65, the second transistor Q2, and the first... The second diode D5 and the first operational amplifier U4; one end of the sixth resistor R68 is connected to the MCU_2U_RX pin of the main control chip, and the other end of the sixth resistor R68 is connected to the collector of the second transistor Q2; one end of the seventh resistor R68 is connected to the power supply unit, and the other end of the seventh resistor R69 is connected to the common terminal of the sixth resistor R68 and the second transistor Q2; the emitter of the second transistor Q2 is grounded, the base of the second transistor Q2 is connected to one end of the eighth resistor R67, the other end of the eighth resistor R67 is connected to the cathode of the second diode D5, and the anode of the second diode D5 is connected to the output terminal of the first operational amplifier U4; one end of the ninth resistor R65 is connected to the power supply unit, and the ninth resistor R65... The other end is connected to the common terminal of the second diode D5 and the first operational amplifier U4; the non-inverting input terminal of the first operational amplifier U4 is connected to the RJ45_IR-TX pin of the transmitter port, and the inverting input terminal of the first operational amplifier U4 is connected to the power supply unit; the device signal transmission unit is used to parse and transmit IR signals and power-on device mutual recognition signals between the remote transmitter and the field receiver. When the device is first powered on, the field receiver sends an EDID control signal to the remote transmitter via the TX circuit, and the remote transmitter sends an EDID control signal back to the field receiver via the RX circuit. In this way, mutual recognition and connection are established between the remote transmitter and the field receiver when the device is first powered on.After the equipment is powered on normally, either the remote transmitter or the field receiver receives the IR control signal from the external remote control through its corresponding configured infrared receiving window. The field receiver then transmits the received IR control signal to the remote transmitter via the TX loop. After being parsed by the main control chip, the main control chip sends control commands to the field receiver via the RX loop to control the operation of the field receiver, thereby controlling the playback of various audio or video players connected to the field receiver. Therefore, establishing a signal transmission unit helps establish a transmission channel for EDID and IR control signals between the remote transmitter and the field receiver, facilitating control connections between them.

[0036] Please see Figure 1-2 In this specific embodiment, both the transmitting and receiving ports are RJ45 ports. The extended transmission line is constructed using CAT5E and / or CAT6 network cables. In practice, power supply and reception between the remote transmitter and the field receiver are achieved via POC or PoE using CAT5E or CAT6 network cables.

[0037] Please see Figure 8 In this specific embodiment, the field receiver includes a receiving audio and video processing unit, which is used to receive and parse audio and video signals. The receiving audio and video processing unit includes a receiving audio and video processing chip and its peripheral circuits. The receiving audio and video processing chip is model GVS5100. The receiving audio and video processing chip is connected to the receiving port and is also connected to the audio output port / video output port HDMI_TX.

[0038] Please see Figure 8 The field receiver also includes a receiving logic control unit; the receiving logic control unit includes a receiving logic chip and an IR receiving unit; the receiving logic chip is model GD32F303CCT, and the receiving logic chip is connected to the receiving audio and video processing chip and the receiving port respectively; the IR receiving unit is connected to the receiving port, and the IR receiving unit is also connected to the receiving logic chip. The IR receiving unit is used to transmit and receive IR signals transmitted between the remote transmitting end and the field receiver.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An audio / video extension switcher, characterized in that, include: A remote transmitter, located at a distance from the user, has a transmission resolution module, a transmission port, at least one audio input port, and at least one video input port; Each of the audio input ports is connected to the transmission analysis module; each of the video input ports is connected to the transmission analysis module, and the transmission analysis module is connected to the transmission port; The on-site receiver is located near the user and includes a receiving port, a receiving and parsing module, at least one audio output port, and at least one video output port. The receiving port is connected to the receiving and parsing module, the receiving and parsing module is connected to each of the audio output ports, and the audio output ports are connected to an external audio playback device to play the corresponding audio content. The receiving and parsing module is also connected to each of the video output ports, and the video output ports are connected to external video playback devices to play the corresponding video content. An extended transmission line is provided, which is located between the remote transmitter and the field receiver and connects the two, and the transmitter port and the receiver port interact over a long distance through the transmission line.

2. The audio / video extension switcher as described in claim 1, characterized in that, The audio input port is a Type-C port, and external audio signals are connected through the audio input port.

3. The audio / video extension switcher as described in claim 1, characterized in that, The video input port is an HDMI port, through which external video signals are input.

4. The audio / video extension switcher as described in any one of claims 1-3, characterized in that, The transmission analysis module includes a first audio / video processing unit and a second audio / video processing unit. The first audio / video processing unit receives and mixes audio and video signals, and the second audio / video processing unit converts the mixed audio and video signals into network signals that can be transmitted over long distances. The first audio / video processing unit is connected to the audio input port and the video input port, respectively. The first audio / video processing unit is connected to the second audio / video processing unit. The first audio / video processing unit includes a first audio / video processing chip and its peripheral circuits. The model of the first audio / video processing chip is GSV6712. The second audio / video processing unit is connected to the transmission port. The second audio / video processing unit includes a second audio / video processing chip and its peripheral circuits. The model of the second audio / video processing chip is GVS5100.

5. The audio / video extension switcher as described in claim 4, characterized in that, The transmission analysis module further includes a power supply unit and a transmission logic control unit. The power supply unit provides at least one operating power source among 1.2V, 3.3V, 5V, 12V, or 24V. The power supply unit is connected to the first audio / video processing unit, the second audio / video processing unit, and the transmission logic control unit. The transmission logic control unit monitors the circuit operation and sends corresponding control signals. The transmission logic control unit includes a main control chip and its peripheral circuits. The main control chip is model GD32F303CCT. The main control chip is connected to the first audio / video processing chip and the second audio / video processing chip to control the working process of the first audio / video processing chip and the second audio / video processing chip, respectively.

6. The audio / video extension switcher as described in claim 5, characterized in that, The transmission analysis module also includes a device signal transmission unit; the device signal transmission unit is used to analyze and transmit IR signals and power-on device mutual recognition signals between the remote transmitter and the field receiver. The device signal transmission unit includes an RX circuit and a TX circuit; the RX circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first transistor, and a first diode; one end of the first resistor is connected to the transmitting port, and the other end of the first resistor is connected to the collector of the first transistor; one end of the second resistor is connected to the common terminal of the first resistor and the first transistor, and the other end of the second resistor is grounded; one end of the third resistor is connected to the power supply unit, and the other end of the third resistor is connected to the collector of the first transistor; the transmitter of the first transistor is grounded, the base of the first transistor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the anode of the first diode; The cathode of the first diode is connected to the main control chip; one end of the fifth resistor is connected to the power supply unit, and the other end of the fifth resistor is connected to the common terminal of the fourth resistor and the first diode; The TX circuit is used to resolve and transmit IR signals between the remote transmitter and the field receiver. The TX circuit includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second transistor, a second diode, and a first operational amplifier. One end of the sixth resistor is connected to the main control chip, and the other end is connected to the collector of the second transistor. One end of the seventh resistor is connected to the power supply unit, and the other end is connected to the common terminal of the sixth resistor and the second transistor. The emitter of the second transistor is grounded, the base of the second transistor is connected to one end of the eighth resistor, and the other end of the eighth resistor is connected to the cathode of the second diode. The anode of the second diode is connected to the output terminal of the first operational amplifier. One end of the ninth resistor is connected to the power supply unit, and the other end is connected to the common terminal of the second diode and the first operational amplifier. The non-inverting input of the first operational amplifier is connected to the transmitting port, and the inverting input of the first operational amplifier is connected to the power supply unit.

7. The audio / video extension switcher as described in claim 4, characterized in that, Both the transmitting port and the receiving port are RJ45 ports.

8. The audio / video extension switcher as described in claim 7, characterized in that, The extended transmission line is constructed using CAT5E and / or CAT6 network cables.

9. The audio / video extension switcher as described in claim 8, characterized in that, The field receiving end includes a receiving audio and video processing unit, which is used to receive and parse audio and video signals. The receiving audio and video processing unit includes a receiving audio and video processing chip and its peripheral circuits. The receiving audio and video processing chip is a GVS5100. The receiving audio and video processing chip is connected to the receiving port. The receiving audio and video processing chip is also connected to each of the audio output ports and each of the video output ports.

10. The audio / video extension switcher as described in claim 9, characterized in that, The field receiver also includes a receiving logic control unit and an IR receiving unit; the receiving logic control unit includes a receiving logic chip, the receiving logic chip being model GD32F303CCT, the receiving logic chip being connected to the receiving audio and video processing chip and the receiving port respectively; the IR receiving unit is connected to the receiving port, and the IR receiving unit is also connected to the receiving logic chip, the IR receiving unit being used to transmit and receive IR signals transmitted between the remote transmitter and the field receiver.

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