Audio and video conversion control circuit and audio and video equipment

Abstract

The utility model discloses an audio and video conversion control circuit and audio and video equipment. The audio and video conversion control circuit comprises a main control module, an audio and video input interface module, an audio and video output interface module, a switching control module and a display processing module, the switching control module comprises a dial switch unit and a switching control unit; the audio and video input interface module is electrically connected with the main control module, the main control module is electrically connected with the audio and video output interface module, and the main control module is electrically connected with the display processing module; the dial switch unit is electrically connected with the switching control unit, and the switching control unit is electrically connected with the main control module. According to the utility model, multi-interface conversion can be realized, the compatibility is strong, and the use requirements of multiple scenes can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of audio and video control, in particular to an audio and video conversion control circuit and an audio and video device. Background Art

[0002] Audio and video equipment is a device used to switch and distribute video and audio signals. Audio and video equipment can switch multiple audio and video signals from input channels to any channel in the output channel, and the output channels are independent of each other. In actual applications, it is usually necessary to connect the audio and video switcher to the central control device, and the central control device controls the audio and video switcher to switch and distribute the access audio and video signals.

[0003] In the prior art, in some special application scenarios, audio and video equipment needs to be connected to output loads such as speakers and displays to meet the user's usage needs. However, with the diversification of usage scenarios, audio and video equipment may be inconsistent with the interfaces of certain output devices, and incompatible, and limited in use. Therefore, inventing an audio and video conversion control circuit and an audio and video device with strong compatibility is an urgent problem to be solved by technicians in this field. Utility Model Content

[0004] The purpose of this application is to provide an audio and video conversion control circuit and an audio and video device. In this solution, multi-interface conversion can be realized, the compatibility is strong, and the usage requirements of multiple scenarios can be met.

[0005] In order to solve the above technical problems, the present application provides an audio and video conversion control circuit, including a main control module, an audio and video input interface module, an audio and video output interface module, a switching control module and a display processing module; the switching control module includes a dip switch unit and a switching control unit;

[0006] The audio and video input interface module is electrically connected to the main control module, the main control module is electrically connected to the audio and video output interface module, and the main control module is electrically connected to the display processing module;

[0007] The dial switch unit is electrically connected to the switching control unit, and the switching control unit is electrically connected to the main control module.

[0008] Preferably, the main control module includes a control unit, a synchronization unit, a MUX unit, a SCALER unit, a DDR unit, a timing unit and an audio and video processing unit;

[0009] The control unit is electrically connected to the synchronization unit, the MUX unit, the SCALER unit, the DDR unit, the timing unit and the audio and video processing unit respectively;

[0010] The control unit is electrically connected to the audio and video input interface module, the audio and video output interface module, the switching control module and the display processing module respectively.

[0011] Preferably, the audio and video input interface module includes a first audio and video input interface unit and a second audio and video input interface unit;

[0012] The first audio and video input interface unit is electrically connected to the main control module, and the second audio and video input interface unit is electrically connected to the main control module.

[0013] Preferably, the audio and video input interface module further includes a third audio and video input interface unit;

[0014] The third audio and video input interface unit is electrically connected to the main control module.

[0015] Preferably, the audio and video output interface module comprises a first audio and video output interface unit;

[0016] The first audio and video output interface unit is electrically connected to the main control module.

[0017] Preferably, the audio and video output interface module further includes a second audio and video output interface unit;

[0018] The second audio and video output interface unit is electrically connected to the main control module.

[0019] Preferably, the audio and video output interface module further includes a third audio and video output interface unit;

[0020] The third audio and video output interface unit is electrically connected to the main control module.

[0021] Preferably, the input signal source of the first audio and video input interface unit is set to one of HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input, and the input signal source of the second audio and video input interface unit is set to one of HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input.

[0022] Preferably, the signal output type of the first audio and video output interface unit is set to one of SD I output, HDMI output or analog audio output.

[0023] In order to solve the above technical problems, the present application provides an audio and video device, including the above-mentioned audio and video conversion control circuit.

[0024] The utility model has the following beneficial effects: an audio and video conversion control circuit and an audio and video device, the utility model discloses an audio and video conversion control circuit comprising a main control module, an audio and video input interface module, an audio and video output interface module, a switching control module and a display processing module; the switching control module comprises a dial switch unit and a switching control unit; the audio and video input interface module is electrically connected to the main control module, the main control module is electrically connected to the audio and video output interface module, the main control module is electrically connected to the display processing module; the dial switch unit is electrically connected to the switching control unit, and the switching control unit is electrically connected to the main control module. Therefore, the utility model can realize multi-interface conversion, has strong compatibility, and can meet the use requirements of multiple scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0026] Figure 1 This is a schematic diagram of the principle block diagram of an audio and video conversion control circuit of a preferred embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the principle block diagram of an audio and video conversion control circuit of a preferred embodiment of the utility model;

[0028] Figure 3 This is a circuit schematic diagram of a first audio and video input interface unit of a preferred embodiment of the utility model;

[0029] Figure 4 This is a circuit schematic diagram of a second audio and video input interface unit of a preferred embodiment of the utility model;

[0030] Figure 5 This is a circuit diagram of a third audio and video input interface unit of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0031] The core of this application is to provide an audio and video conversion control circuit and an audio and video device. In this solution, multi-interface conversion can be realized, with strong compatibility, and can meet the usage requirements of multiple scenarios.

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] See also Figure 1 , Figure 1 A schematic block diagram of an audio and video conversion control circuit provided in the present application includes a main control module 1, an audio and video input interface module 2, an audio and video output interface module 3, a switching control module 4 and a display processing module 5; the switching control module 4 includes a dip switch unit 41 and a switching control unit 42;

[0034] The audio and video input interface module 2 is electrically connected to the main control module 1, the main control module 1 is electrically connected to the audio and video output interface module 3, and the main control module 1 is electrically connected to the display processing module 5;

[0035] The DIP switch unit 41 is electrically connected to the switching control unit 42 , and the switching control unit 42 is electrically connected to the main control module 1 .

[0036] In the prior art, in some special application scenarios, audio and video devices need to be connected to output loads such as speakers and displays to meet user needs. However, with the diversification of usage scenarios, audio and video devices may not be consistent with the interfaces of certain output devices, and are not compatible, which limits their use.

[0037] In view of the above shortcomings, in this application, a multi-interface conversion function is realized through the cooperation of the main control module 1, the audio and video input interface module 2, the audio and video output interface module 3, the switching control module 4 and the display processing module 5.

[0038] Specifically, the main control module 1 is configured as a FPGA (Field Programmable Gate Array, which is a product further developed on the basis of programmable devices such as PAL (Programmable Array Logic) and GAL (General Array Logic)). In this embodiment, the type of FPGA is not specifically limited.

[0039] Specifically, in this embodiment, the audio and video input interface module 2 is used to receive multiple audio and video signals, the main control module 1 is used to synchronize the multiple audio and video signals to the internal system clock of the FPGA, and after signal processing, select one audio and video signal source as the output source, and transmit it to the output load through the audio and video output interface module 3.

[0040] Specifically, in this embodiment, the switching control module 4 is used to switch multiple audio and video signals and select one or more audio and video signals as input sources. The dip switch unit 41 is used to receive a dip switch signal from an external user, and the switching control unit 42 is used to identify the dip switch signal and form a switching control instruction to be transmitted to the main control module 1.

[0041] Specifically, in this embodiment, the display processing module 5 is used to perform display output processing on the connected display, and the display is used to display the currently selected output picture with corresponding timing information, sound column diagram, etc.

[0042] Specifically, in the present embodiment, the switching control unit 42 is configured as an MCU (Micro Control Unit, also known as a single-chip microcomputer or single-chip microcomputer, which refers to the integration of a computer's CPU, RAM, ROM, timing counter and various I / O interfaces on a single chip with the emergence and development of large-scale integrated circuits to form a chip-level computer for different combination controls for different application scenarios). In the present embodiment, the model of the switching control unit 42 is not specifically limited.

[0043] In summary, the present application provides an audio and video conversion control circuit, which includes a main control module 1, an audio and video input interface module 2, an audio and video output interface module 3, a switching control module 4 and a display processing module 5; the switching control module 4 includes a DIP switch unit 41 and a switching control unit 42; the audio and video input interface module 2 is electrically connected to the main control module 1, the main control module 1 is electrically connected to the audio and video output interface module 3, and the main control module 1 is electrically connected to the display processing module 5; the DIP switch unit 41 is electrically connected to the switching control unit 42, and the switching control unit 42 is electrically connected to the main control module 1. Therefore, the utility model can realize multi-interface conversion, has strong compatibility, and can meet the use requirements of multiple scenarios.

[0044] Based on the above embodiments:

[0045] Please refer to Figure 2 , Figure 2 A schematic block diagram of a principle of an audio and video conversion control circuit provided in this application.

[0046] As a preferred embodiment, the main control module 1 includes a control unit 11, a synchronization unit 12, a MUX unit 13, a SCALER unit 14, a DDR unit 15, a timing unit 16 and an audio and video processing unit 17;

[0047] The control unit 11 is electrically connected to the synchronization unit 12, the MUX unit 13, the SCALER unit 14, the DDR unit 15, the timing unit 16 and the audio and video processing unit 17 respectively;

[0048] The control unit 11 is electrically connected to the audio and video input interface module 2 , the audio and video output interface module 3 , the switching control module 4 and the display processing module 5 , respectively.

[0049] Specifically, in this embodiment, the audio and video input interface module 2 is used to receive multiple audio and video signals, the synchronization unit 12 is used to realize the synchronization control of multiple audio and video signals, the MUX unit 13 is used to realize the selection function of multiple audio and video signals, the SCALER unit 14 is used to realize the image scaling function, the DDR unit 15 is used to realize the DDR cache and arbitration function, the timing unit 16 is used to realize the frame rate conversion function, and the audio and video processing unit 17 is used to realize audio processing and real-time display control of the sound bar graph.

[0050] Specifically, in this embodiment, the control unit 11 is provided with an HDMI ENC unit, an SDI TX unit and an SDI CD unit. The HDMI ENC unit is used to implement HDMI transmission, the SDI TX unit implements SDI transmission, and the SDI CD unit is used to drive SDI transmission and realize one input and two outputs.

[0051] Please refer to Figure 3 , Figure 3 A circuit schematic diagram of a first audio and video input interface unit provided in this application.

[0052] Please refer to Figure 4 , Figure 4 A circuit schematic diagram of a first audio and video input interface unit provided in this application.

[0053] Please refer to Figure 5 , Figure 5 A circuit schematic diagram of a first audio and video input interface unit provided in this application.

[0054] As a preferred embodiment, the audio and video input interface module 2 includes a first audio and video input interface unit and a second audio and video input interface unit;

[0055] The first audio and video input interface unit is electrically connected to the main control module 1 , and the second audio and video input interface unit is electrically connected to the main control module 1 .

[0056] As a preferred embodiment, the audio and video input interface module 2 further includes a third audio and video input interface unit;

[0057] The third audio and video input interface unit is electrically connected to the main control module 1 .

[0058] As a preferred embodiment, the input signal source of the first audio and video input interface unit is set to one of HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input, and the input signal source of the second audio and video input interface unit is set to one of HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input.

[0059] As a preferred embodiment, the audio and video output interface module 3 includes a first audio and video output interface unit;

[0060] The first audio and video output interface unit is electrically connected to the main control module 1 .

[0061] As a preferred embodiment, the audio and video output interface module 3 further includes a second audio and video output interface unit;

[0062] The second audio and video output interface unit is electrically connected to the main control module 1 .

[0063] As a preferred embodiment, the audio and video output interface module 3 further includes a third audio and video output interface unit;

[0064] The third audio and video output interface unit is electrically connected to the main control module 1 .

[0065] As a preferred embodiment, the signal output type of the first audio and video output interface unit is set to one of SDI output, HDMI output or analog audio output.

[0066] Specifically, in this embodiment, 8 video signals and their respective audio signals can be received synchronously, including HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input.

[0067] Specifically, in this embodiment, 4-channel audio and video signal output can be achieved, including 2-channel SDI output, 1-channel HDMI output and 1-channel analog audio output.

[0068] Therefore, the utility model can realize the conversion of multiple inputs to SD I and HDMI output at the same time; it can also realize the change of input signal resolution and frame rate. The application has strong compatibility and can convert analog signals and other old equipment signals to the current universal SD I and HDMI interfaces; in addition, the application can also display the currently selected output screen, input and output timing information through the display, and realize real-time display of audio in the form of a sound bar graph.

[0069] The present application also provides an audio and video device, comprising the audio and video conversion control circuit.

[0070] For an introduction to an audio and video conversion control circuit provided in the present application, please refer to the above-mentioned embodiment, and the present application will not go into details here.

[0071] It should be noted that, in this specification, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An audio and video conversion control circuit, characterized in that: It includes a main control module, an audio and video input interface module, an audio and video output interface module, a switching control module and a display processing module; the switching control module includes a dial switch unit and a switching control unit; The audio and video input interface module is electrically connected to the main control module, the main control module is electrically connected to the audio and video output interface module, and the main control module is electrically connected to the display processing module; The dial switch unit is electrically connected to the switching control unit, and the switching control unit is electrically connected to the main control module.

2. The audio and video conversion control circuit according to claim 1, characterized in that: The main control module includes a control unit, a synchronization unit, a MUX unit, a SCALER unit, a DDR unit, a timing unit and an audio and video processing unit; The control unit is electrically connected to the synchronization unit, the MUX unit, the SCALER unit, the DDR unit, the timing unit and the audio and video processing unit respectively; The control unit is electrically connected to the audio and video input interface module, the audio and video output interface module, the switching control module and the display processing module respectively.

3. The audio and video conversion control circuit according to claim 1, characterized in that: The audio and video input interface module includes a first audio and video input interface unit and a second audio and video input interface unit; The first audio and video input interface unit is electrically connected to the main control module, and the second audio and video input interface unit is electrically connected to the main control module.

4. The audio and video conversion control circuit according to claim 3, characterized in that: The audio and video input interface module also includes a third audio and video input interface unit; The third audio and video input interface unit is electrically connected to the main control module.

5. The audio and video conversion control circuit according to claim 1, characterized in that: The audio and video output interface module includes a first audio and video output interface unit; The first audio and video output interface unit is electrically connected to the main control module.

6. The audio and video conversion control circuit according to claim 5, characterized in that: The audio and video output interface module also includes a second audio and video output interface unit; The second audio and video output interface unit is electrically connected to the main control module.

7. The audio and video conversion control circuit according to claim 6, characterized in that: The audio and video output interface module also includes a third audio and video output interface unit; The third audio and video output interface unit is electrically connected to the main control module.

8. The audio and video conversion control circuit according to claim 3, characterized in that: The input signal source of the first audio and video input interface unit is set to one of HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input; the input signal source of the second audio and video input interface unit is set to one of HDMI input, SDI input, DVI input, YPBPR input, VGA input, SVIDEO input, CVBS input, and analog audio input.

9. The audio and video conversion control circuit according to claim 5, characterized in that: The signal output type of the first audio and video output interface unit is set to one of SDI output, HDMI output or analog audio output.

10. An audio and video device, characterized in that: An audio-video conversion control circuit comprising any one of claims 1 to 9.

Images