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Multi-channel video capture card and its processing method

A video capture card and multi-channel technology, applied in the field of video processing, can solve problems such as high cost, low work efficiency, and complex structure, and achieve the effects of simple structure, improved work efficiency, and low system cost

Active Publication Date: 2018-08-17
BEIJING ITSYNC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a multi-channel video capture card and its processing method, which can solve the problems of high cost, complex structure and low work efficiency in the prior art

Method used

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  • Multi-channel video capture card and its processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 A schematic structural diagram of a multi-channel video capture card according to Embodiment 1 of the present invention is shown. The multi-channel video capture card is installed in a computer and is used to capture video signals and time codes output by at least one video output device.

[0032] The video output device mentioned in this embodiment may be any device capable of outputting video signals, such as a video camera and a video player, and is not limited herein.

[0033] Since the output video timings of multiple video output devices are not synchronized, this embodiment introduces a synchronous generator, and all video output devices will use the synchronous generator as a reference clock to synchronize the output video timings of multiple video output devices.

[0034] Such as figure 1 As shown, the multi-channel video acquisition card includes: a video receiving processing module 10, a time code receiving module 20, a data acquisition control modu...

Embodiment 2

[0043] like figure 2 As shown, the multi-channel video acquisition card in Embodiment 1 may also include: a switching point receiving module 50, connected to the data acquisition control module 30, for receiving bit switching time and switching action, wherein,

[0044] The data acquisition control module 30 is also used to read out the switching time and switching action data, and write the data into the memory of the computer through the bus control interface 40 .

[0045] During the recording process of some multi-camera programs, camera positions are switched by operating the production switcher at the recording site, such as figure 2 As shown, this embodiment introduces a switcher, the switcher receives the video signals output by multiple video output devices, the operator switches the positions of the multi-channel videos through the switcher, and outputs the received multi-channel video signals to the video receiver The processing module 10 outputs the switching tim...

Embodiment 3

[0048] like image 3 As shown, the video reception processing module 10 in the multi-channel video capture card in Embodiments one and two may include: at least one video reception unit 102, at least one video compression unit 104 and buffer storage unit 106, wherein,

[0049] Each video receiving unit 102 corresponds to each video compressing unit 104 one by one, and is used to receive a video signal, convert the video signal into a parallel digital video signal, and output it to the video compressing unit 104;

[0050] Each video compression unit is connected to the video receiving unit 102 and the buffer storage unit 106, and is used to compress the parallel digital video signal in real time and output it to the buffer storage unit 106;

[0051] The buffer storage unit 106 is connected with each video compression unit 104 and the data acquisition control module 30, and is used to buffer and store at least one path of the compressed parallel digital video signal for the data...

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PUM

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Abstract

The invention discloses a multichannel video capture card. The multichannel video capture card comprises a video receiving and processing module, a time code receiving module and a data collection control module, wherein the video receiving and processing module is connected with the data collection control module, and used for receiving at least one channel of video signals and processing the video signals; the time code receiving module is connected with the data collection control module and used for receiving time codes output synchronously with all video frames of the video signals; the data collection control module is connected with the video receiving and processing module, the time code receiving module and a bus control interface, and used for reading the video signals processed through the video receiving and processing module and data of the time codes and writing the video signals and the data in computer memory through the bus control interface. The invention also discloses a processing method of the multichannel video capture card. The multichannel video capture card directly records video output of a plurality of cameras, saves a plurality of video equipment, replaces the existing single-channel video capture card, has a simple structure, and saves cost.

Description

technical field [0001] The present invention relates to the technical field of video processing, and more specifically, to a multi-channel video capture card and a processing method thereof. Background technique [0002] In the process of program production with multiple cameras, it is first necessary to collect the video signals output by multiple cameras, and also to collect the time code (Time Code, TC) of the video signal, and combine the video signal and the time code together. And write it into the computer to form the program material for later editing. In the post-editing of the program, materials from multiple camera positions in the same scene need to maintain the original relative time relationship on different video tracks. Therefore, certain synchronization techniques need to be adopted, such as selecting a specific video frame as the Time reference, or capture synchronized time code while capturing video signal, etc. [0003] In the prior art, devices that co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/781H04N5/917H04N5/92
Inventor 王海洋
Owner BEIJING ITSYNC TECH
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