CN211720640U

CN211720640U - 4 advance 2 and go out high definition audio frequency and video matrix circuit

Info

Publication number: CN211720640U
Application number: CN201921938175.1U
Authority: CN
Inventors: 周忠彪; 何丹文; 蔡杰鑫; 刘会强
Original assignee: Shenzhen Biaowei Electronics Co ltd
Current assignee: Shenzhen Biaowei Electronics Co ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-10-20
Anticipated expiration: 2029-11-11

Abstract

The utility model belongs to the technical field of audio and video transmission, and discloses a 4-in 2-out high-definition audio and video matrix circuit, which comprises a plurality of signal receiving circuits, a master control circuit, a plurality of signal sending circuits, an audio conversion circuit and a signal switching circuit; the input ends of the signal receiving circuits are connected with external HDMI signals, and the HDMI signals are output to the corresponding input ends of the main control circuit through the output ends; the utility model discloses an audio frequency conversion circuit can separate out audio signal to audio frequency conversion circuit can make present 1 way SPDIF audio output and 4 way IIS audio output, such design convenience and the separation between the signal handle and the multiple mode conveying of audio signal, give main control circuit through audio frequency conversion circuit output control signal in addition, convenient and the change between the signal like this.

Description

4 advance 2 and go out high definition audio frequency and video matrix circuit

Technical Field

The utility model belongs to the technical field of audio and video transmission, concretely relates to 4 advance 2 and go out high definition audio and video matrix circuit.

Background

The development of science and technology also makes electronic products change day by day, and the resolution of the devices such as DVD, tv box or game machine in the present society is improved to 4K60HZ, and the HDMI4 in 2 out matrix on the market is mostly HDMI1.4, so the 4 in 2 out matrix of HDMI2.0 needs to be developed. The original HDMI1.4 matrix cannot meet the requirement of the current society on 4K, the HDMI2.06G4 in-and-out 2 matrix meets the requirement of the current society on high resolution, and meanwhile, the client can experience the change brought by the 4K era.

However, the current HDMI matrix still stays on the platform of 4K30HZ, the resolution of playing video in life or business is continuously increased, 4K30HZ cannot meet the current application, the market and the existing technical requirements are urgently met, and we need to develop a matrix of 4K60HZ to meet the current requirements.

Thus, one of the technical problems that needs to be urgently solved by those skilled in the art is: the HDMI4K60HZ signal four-in two-out can be solved, and the audio in the HDMI can be separated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 4 advance 2 and go out high definition audio and video matrix circuit to propose four into two plays of HDMI4K60HZ signal in solving above-mentioned background art, and can isolate the audio frequency in the HDMI.

In order to achieve the above object, the utility model provides a following technical scheme: a4-in 2-out high-definition audio and video matrix circuit comprises a plurality of signal receiving circuits, a main control circuit, a plurality of signal sending circuits, an audio conversion circuit and a signal switching circuit; the input ends of the signal receiving circuits are connected with external HDMI signals, and the HDMI signals are output to the corresponding input ends of the main control circuit through the output ends; the master control circuit converts a plurality of HDMI signals into two paths of HDMI signals after performing matrix processing on the HDMI signals, the two paths of HDMI signals are respectively output to the audio conversion circuit and the signal switching circuit through the plurality of signal sending circuits, and the audio conversion circuit separates the HDMI signals after accessing the HDMI signals and separates the audio signals to the lower circuit; after the signal switching circuit is connected with the HDMI signal, the HDMI signal is output to an external display or a control signal is fed back to the main control circuit, so that the main control circuit switches the HDMI signal output.

Preferably, the number of the signal receiving circuits is set to 4, and each of the 4 signal receiving circuits includes an HDMI signal detection circuit, a signal receiving terminal HDMI-a connection terminal, and a peripheral circuit connected to the main control circuit.

Preferably, the HDMI signal detection circuit includes a circuit including two resistors.

Preferably, the master control circuit comprises an EP9472 chip and peripheral circuits thereof, corresponding input ends of the EP9472 chip are connected with the plurality of signal receiving circuits, and corresponding output ends of the EP9472 chip are connected with the plurality of signal transmitting circuits.

Preferably, the number of the signal transmitting circuits is 2, and each of the 2 signal transmitting circuits comprises a TX connection socket and a peripheral circuit connected between EP9472 chips.

Preferably, the audio conversion circuit comprises a GS4344 chip and peripheral circuits thereof, and a corresponding input end of the GS4344 chip is connected with a corresponding output end of the EP9472 chip.

Preferably, the signal switching circuit comprises an EPG026 chip and peripheral circuits thereof; the input end corresponding to the EPG026 chip is connected with the input end corresponding to the EP9472 chip, and the output end corresponding to the EPG026 chip is connected with the control end corresponding to the EP9472 chip.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model converts the HDMI signals received by the 4 signal receiving circuits into 2 HDMI signals through the main control circuit, and sends out the HDMI signals through the 2 signal sending circuits respectively to the audio conversion circuit and the signal switching circuit; in such a way, 4 paths of signals are converted into 2 paths of signals; in addition, the audio signal can be separated through the audio conversion circuit, the audio conversion circuit can enable the existing 1-path SPDIF audio output and 4-path IIS audio output to be achieved, the design is convenient to achieve separation processing between the signals and transmission of the audio signals in various modes, and in addition, the control signals are output to the main control circuit through the audio conversion circuit, and therefore replacement between the signals is convenient.

Drawings

FIG. 1 is a schematic diagram of one of a plurality of signal receiving circuits according to the present invention;

FIG. 2 is a schematic diagram of a main control circuit of the present invention;

FIG. 3 is a schematic diagram of one of the signal transmitting circuits of the present invention;

fig. 4 is a schematic diagram of the audio conversion circuit of the present invention;

fig. 5 is a schematic diagram of the signal switching circuit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution of a 4-in 2-out high definition audio/video matrix circuit: a4-in 2-out high-definition audio and video matrix circuit is disclosed, which comprises a plurality of signal receiving circuits 1, a main control circuit 2, a plurality of signal sending circuits 3, an audio conversion circuit 4 and a signal switching circuit 5; the input ends of the signal receiving circuits are all connected with external HDMI signals, and the HDMI signals are all output to the corresponding input end 21 of the main control circuit 2 through the output end; the main control circuit 2 converts a plurality of HDMI signals into two HDMI signals 22 after performing matrix processing on the HDMI signals, and outputs the two HDMI signals to the audio conversion circuit 4 and the signal switching circuit 5 through the plurality of signal transmitting circuits 3, and the audio conversion circuit 4 separates the HDMI signals after accessing the HDMI signals and separates the HDMI signals to obtain audio signals which are sent to a lower circuit; after the signal switching circuit 5 is connected to the HDMI signal, the HDMI signal is output to an external display or a control signal is fed back to the main control circuit 2, so that the main control circuit 2 switches the output of the HDMI signal.

The number of the signal receiving circuits 1 is set to 4, and each of the 4 signal receiving circuits comprises an HDMI signal detection circuit 11, a signal receiving end HDMI-A connecting end and a peripheral circuit connected with the main control circuit 2.

The HDMI signal detection circuit 11 includes a circuit formed by two resistors.

The main control circuit 2 comprises an EP9472 chip and peripheral circuits thereof, corresponding input ends of the EP9472 chip are connected with the plurality of signal receiving circuits 1, and corresponding output ends of the EP9472 chip are connected with the plurality of signal sending circuits 3.

The number of the signal transmitting circuits is 3, and the number of the signal transmitting circuits is 2, and the 2 signal transmitting circuits comprise TX connecting seats and peripheral circuits connected among EP9472 chips.

The audio conversion circuit 4 comprises a GS4344 chip and peripheral circuits thereof, and the corresponding input end of the GS4344 chip is connected with the corresponding output end of the EP9472 chip.

The signal switching circuit 5 comprises an EPG026 chip and peripheral circuits thereof; the input end corresponding to the EPG026 chip is connected with the input end corresponding to the EP9472 chip, and the output end corresponding to the EPG026 chip is connected with the control end corresponding to the EP9472 chip.

The utility model discloses a theory of operation:

the utility model converts the HDMI signals received by 4 signal receiving circuits into 2 HDMI signals through the main control circuit 2, and sends out the HDMI signals through 2 signal sending circuits respectively to the audio conversion circuit 4 and the signal switching circuit 5; in such a way, 4 paths of signals are converted into 2 paths of signals; in addition, the audio signal can be separated through the audio conversion circuit 4, the audio conversion circuit 4 can enable the existing 1-path SPDIF audio output and 4-path IIS audio output to be achieved, the design is convenient to achieve separation processing between the signals and transmission of the audio signals in multiple modes, and in addition, the audio conversion circuit 4 outputs a control signal to the main control circuit 2, and therefore replacement between the signals is convenient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a 4 advance 2 and go out high definition audio frequency video matrix circuit which characterized in that: the device comprises a plurality of signal receiving circuits, a main control circuit, a plurality of signal sending circuits, an audio conversion circuit and a signal switching circuit; the input ends of the signal receiving circuits are connected with external HDMI signals, and the HDMI signals are output to the corresponding input ends of the main control circuit through the output ends; the master control circuit converts a plurality of HDMI signals into two paths of HDMI signals after performing matrix processing on the HDMI signals, the two paths of HDMI signals are respectively output to the audio conversion circuit and the signal switching circuit through the plurality of signal sending circuits, and the audio conversion circuit separates the HDMI signals after accessing the HDMI signals and separates the audio signals to the lower circuit; after the signal switching circuit is connected with the HDMI signal, the HDMI signal is output to an external display or a control signal is fed back to the main control circuit, so that the main control circuit switches the HDMI signal output.

2. The 4-in 2-out high definition audio and video matrix circuit according to claim 1, characterized in that: the number of the signal receiving circuits is set to be 4, and the 4 signal receiving circuits comprise HDMI signal detection circuits, signal receiving end HDMI-A connecting ends and peripheral circuits connected with the main control circuit.

3. A 4-in 2-out high definition audio-video matrix circuit according to claim 2, characterized in that: the HDMI signal detection circuit comprises a circuit formed by two resistors.

4. A 4-in 2-out high definition audio-video matrix circuit according to claim 3, wherein: the master control circuit comprises an EP9472 chip and peripheral circuits thereof, wherein corresponding input ends of the EP9472 chip are connected with a plurality of signal receiving circuits, and corresponding output ends of the EP9472 chip are connected with a plurality of signal sending circuits.

5. The 4-in 2-out high definition audio and video matrix circuit according to claim 4, wherein: the number of the signal sending circuits is 2, and the 2 signal sending circuits comprise TX connecting seats and peripheral circuits connected among EP9472 chips.

6. The 4-in 2-out high definition audio and video matrix circuit according to claim 5, wherein: the audio conversion circuit comprises a GS4344 chip and peripheral circuits thereof, wherein the corresponding input end of the GS4344 chip is connected with the corresponding output end of the EP9472 chip.

7. The 4-in 2-out high definition audio and video matrix circuit according to claim 6, wherein: the signal switching circuit comprises an EPG026 chip and peripheral circuits thereof; the input end corresponding to the EPG026 chip is connected with the input end corresponding to the EP9472 chip, and the output end corresponding to the EPG026 chip is connected with the control end corresponding to the EP9472 chip.