CN216751971U - Multichannel audio frequency and video collection system - Google Patents
Multichannel audio frequency and video collection system Download PDFInfo
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- CN216751971U CN216751971U CN202123057060.1U CN202123057060U CN216751971U CN 216751971 U CN216751971 U CN 216751971U CN 202123057060 U CN202123057060 U CN 202123057060U CN 216751971 U CN216751971 U CN 216751971U
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Abstract
The utility model discloses a multichannel audio frequency and video collection system, including multiple video input interface, the analog to digital processing unit, audio frequency and video collection unit, the control unit, a plurality of audio frequency input interface, audio frequency processing unit and output interface, the video signal of multiple video input interface input carries out analog to digital conversion through connecting the analog to digital processing unit, then send into audio frequency and video collection unit, the audio signal of audio frequency input interface input is sent into audio frequency and video collection unit after handling through the audio frequency processing unit, audio frequency and video collection unit connection output port exports corresponding audio and video signal, the control unit respectively with the analog to digital processing unit, audio frequency and video collection unit and audio frequency processing unit are connected. The utility model discloses realize multiple audio and video signal's synchronous input, satisfy the demand that different scenes used, connect simultaneously simply with low costs.
Description
Technical Field
The utility model relates to an audio frequency and video gathers the field, especially relates to a multichannel audio frequency and video collection system.
Background
At present, audio and video acquisition is applied to various fields, and video acquisition equipment with single signal is common in the market at present. However, for the application scenario that multiple paths of analog/digital video and audio signals are required to be inputted, it is obvious that the video acquisition equipment for a single signal cannot meet the requirements.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a multichannel audio video collection system, realize multiple audio video signal's synchronous input, satisfy the demand that different scenes were used, connect simultaneously simply with low costs.
In order to achieve the above object, the utility model provides a following technical scheme: a multi-channel audio and video acquisition system comprises a plurality of video input interfaces, an analog-digital processing unit, an audio and video acquisition unit, a control unit, a plurality of audio input interfaces, an audio processing unit and an output interface, wherein video signals input by the plurality of video input interfaces are subjected to analog-digital conversion by being connected with the analog-digital processing unit and then are sent to the audio and video acquisition unit, audio signals input by the audio input interfaces are sent to the audio and video acquisition unit after being processed by the audio processing unit, the audio and video acquisition unit is connected with the output port to output corresponding audio and video signals, and the control unit is respectively connected with the analog-digital processing unit, the audio and video acquisition unit and the audio processing unit.
Preferably, the plurality of video input interfaces include an AV composite video interface, a video graphics array VGA interface, a color difference component interface, and an AHD analog high definition interface.
Preferably, the video input interface further comprises an HDMI high-definition interface, and is connected to the audio and video acquisition unit through an analog switch K1, and the analog switch K1 is connected to the analog-digital processing unit, so that switching between a digital signal input by the analog-digital processing unit and a video signal input by the HDMI high-definition interface is realized.
Preferably, the multiple audio input interfaces are connected to the audio processing unit through an audio analog switch K2, and the audio analog switch switches the multiple audio input interfaces.
Compared with the prior art, the utility model discloses a multichannel audio and video collection system, the input of integrated multiple audio and video signal, and handle the collection to multiple audio and video signal to realize recording video input's scene demand more, with all unit modularization, integrate, reduce the follow-up connection degree of difficulty, promote the operability, reduce cost simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is an overall schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic frame diagram of an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an AHD analog high definition interface according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a color difference component interface according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an AV composite video interface according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a VGA interface in an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of an HDMI high definition interface according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of an analog-to-digital processing unit according to an embodiment of the present invention;
fig. 9 is a schematic circuit diagram of an audio input according to an embodiment of the present invention;
fig. 10 is a schematic circuit diagram of an audio/video acquisition unit in an embodiment of the present invention;
fig. 11 is a schematic circuit diagram of the main control unit in the embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-2, the multi-channel audio/video acquisition system disclosed in the present invention realizes the access of video signals of various types and the access of a plurality of audio signals, and processes and outputs the signals according to the requirements, and comprises a plurality of video input interfaces, an analog/digital processing unit, an audio/video acquisition unit, a control unit, a plurality of audio input interfaces, an audio processing unit and an output interface, wherein the video input interfaces input various video signals, including AV analog signals, VGA analog signals, color difference component (YPbPr) analog signals and AHD camera signals, HDMI signals, the analog/digital processing unit performs analog/digital conversion on the analog signals in the various video signals, and sends the analog signals to the audio/video acquisition unit, and the digital signals in the video signals are directly sent to the audio/video acquisition unit, and are switched between the signals through an analog switch K1, and the multi-channel audio signals input by the audio input interfaces, the audio analog switch K2 is connected with an audio processing unit for analog-to-digital conversion, and then the audio signal is sent to an audio and video acquisition unit, the audio and video acquisition unit is connected with an output port, corresponding video signals and audio signals are converted into USB signals according to control signals of a control unit, the USB signals are sent to the USB output port, and corresponding audio and video signals are output, and the control unit is respectively connected with the analog-to-digital processing unit, the audio and video acquisition unit, the audio processing unit, an analog quantity switch K1 and an audio analog quantity switch K2.
Specifically, the multiple video input interfaces respectively include an AHD analog high-definition interface, a color difference component interface, an AV composite video interface, a video graphics array VGA interface, and an HDMI high-definition interface, wherein the AHD analog high-definition interface is connected to the camera, and is connected to the analog-to-digital processing unit after being processed by the camera signal processing chip, and the circuit thereof is as shown in fig. 3, pin 2 of the AHD input terminal J1 is connected to pin 4 of the camera signal processing chip PR2020K, and is correspondingly connected to pins 30, 32, 34, 35, 36, 37, 38, and 39 of the analog-to-digital processing unit after passing through output pins 21, 22, 23, 24, 26, 27, 29, and 30 of the camera signal processing chip PR 2020K.
The color difference component interface is directly connected with the analog-digital processing unit, the circuit of the color difference component interface is shown in fig. 4, the pin 1 of the input terminal J2 is connected with the pins 5 and 6 of the analog-digital processing unit, and the pins 3 and 5 of the J2 are correspondingly connected with the pins 10 and 14 of the analog-digital processing unit respectively.
The AV composite video interface is connected directly to the analog to digital processing unit and the circuit is shown in fig. 5 with pin 1 of input terminal J3 connected to pin 3 of the analog to digital processing unit.
The VGA interface is directly connected with the analog-digital processing unit, the circuit of the VGA interface is shown in figure 6, and pins 1, 2, 3, 13 and 14 of the input terminal J4 are correspondingly connected with pins 23, 21, 18, 27 and 26 of the analog-digital processing chip A respectively.
The HDMI high-definition interface outputs digital signals, is directly connected to the audio/video acquisition unit, and is also connected to the analog switch K1, and performs signal output switching control through the analog switch K1, the circuit of the HDMI high-definition interface is as shown in fig. 7, pins 1, 3, 4, 6, 7, 9, 10, and 12 of the input terminal J5 are correspondingly connected to pins 68, 67, 65, 64, 61, 60, 57, and 56 of the audio/video acquisition unit, and pins 15, 16, and 18 of the input terminal J5 are correspondingly connected to pins 1, 3, and 13 of the analog switch K1.
The analog-to-digital processing unit is an analog-to-digital conversion chip, the model is MS1824, and is configured to convert an input analog video signal to form a digital video signal, and send the digital video signal to the audio-video acquisition unit, and is connected to the analog switch K1, and performs signal output switching control through the analog switch K1, as shown in fig. 8, the output pins 87, 88, 89, 90, 91, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, and 107 of the analog-to-digital processing unit are correspondingly connected to the pins 47, 48, 49, 50, 51, 52, 53, 54, 72, 73, 74, 75, 77, 78, 79, and 80 of the audio-video acquisition unit, respectively. The output pins 83, 84, 86 of the analog-to-digital processing unit are connected to the pins 5, 2, 12 of the analog switch K1, respectively.
The multi-channel audio input interface is connected to an audio processing unit through an audio analog switch K2, the audio analog switch realizes the switching among the multi-channel audio input interfaces through a connected control unit, the audio processing unit converts an input analog audio signal into a digital signal to be input into an audio and video acquisition unit, the circuit of the audio processing unit is as shown in fig. 9, pins 1 and 3 of an audio input terminal CN1 are correspondingly connected with pins 7 and 5 of an audio analog quantity switch K2, and pins 1 and 3 of an audio input terminal CN2 are correspondingly connected with pins 10 and 2 of an audio analog quantity switch K2. Output pins 3 and 9 of the audio analog switch K2 are correspondingly connected with pins 10 and 12 of the audio processing unit, respectively, and output pins 2, 4, 7 and 8 of the audio processing unit are connected with pins 21, 20, 18 and 19 of the audio and video acquisition unit, respectively.
The audio and video acquisition unit is an audio and video conversion acquisition chip, the model is MS2109F, integrates input digital video signals and digital audio signals, converts the signals into USB signals and sends the USB signals through a USB output interface, a circuit of the audio and video acquisition unit is shown in figure 10, and output pins 12 and 13 of the audio and video acquisition unit are correspondingly connected with pins 3 and 2 of an output terminal J6 respectively. Output pins 4, 14 and 15 of the analog switch K1 are correspondingly connected with pins 43, 32 and 44 of the audio/video acquisition unit, respectively.
The control unit and its peripheral circuits are shown in fig. 11, and pins 58 and 59 of the MCU micro control unit are correspondingly connected to pins 69 and 70 of the analog-to-digital processing unit, respectively. Pins 42 and 43 of the MCU micro control unit are correspondingly connected with pins 84 and 83 of the audio and video acquisition unit respectively.
The utility model discloses a multichannel audio and video collection system, the input of integrated multiple audio and video signal, and handle the collection to multiple audio and video signal to realize the scene demand of many video input, with all unit modularization, integrate, reduce the follow-up connection degree of difficulty, promote the operability, reduce cost simultaneously.
The technical contents and features of the present invention have been disclosed as above, however, those skilled in the art may still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but should include various substitutions and modifications without departing from the present invention, and should be covered by the claims of the present patent application.
Claims (4)
1. A multichannel audio frequency and video collection system which characterized in that: the device comprises a plurality of video input interfaces, an analog-digital processing unit, an audio and video acquisition unit, a control unit, a plurality of audio input interfaces, an audio processing unit and an output interface, wherein video signals input by the plurality of video input interfaces are subjected to analog-digital conversion by being connected with the analog-digital processing unit and then are sent to the audio and video acquisition unit, audio signals input by the audio input interfaces are sent to the audio and video acquisition unit after being processed by the audio processing unit, the audio and video acquisition unit is connected with the output port and outputs corresponding audio and video signals, and the control unit is respectively connected with the analog-digital processing unit, the audio and video acquisition unit and the audio processing unit.
2. The multi-channel audio-video acquisition system according to claim 1, characterized in that: the multiple video input interfaces comprise an AV composite video interface, a video graphics array VGA interface, a color difference component interface and an AHD simulation high-definition interface.
3. The multi-channel audio-video acquisition system according to claim 2, characterized in that: the video input interface also comprises an HDMI high-definition interface which is connected with the audio and video acquisition unit through an analog switch K1, and meanwhile, the analog switch K1 is connected with the analog-digital processing unit, so that the digital signals input by the analog-digital processing unit and the video signals input by the HDMI high-definition interface are switched.
4. The multi-channel audio-video acquisition system according to claim 1, characterized in that: the multi-channel audio input interface is connected to the audio processing unit through an audio analog switch K2, and the audio analog switch realizes the switching among the multi-channel audio input interfaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123057060.1U CN216751971U (en) | 2021-12-08 | 2021-12-08 | Multichannel audio frequency and video collection system |
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| CN202123057060.1U CN216751971U (en) | 2021-12-08 | 2021-12-08 | Multichannel audio frequency and video collection system |
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| CN216751971U true CN216751971U (en) | 2022-06-14 |
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