Making process of digital audio/video collecting and compressing card

Abstract

A method utilizing MPEG-1 computer picture processing technique and hard ware of DSP+FPGA to fabricate digital audio and vedio collecting compression card includes the following steps: carrying on A / D conversion and synchronous processing for audio and video analog signal through digitization processing chip and to convert it to be digital signal which is stored into storage RAM through digital signal control chip (FPGA), afterwards carrying on preprocessing by digital signal processing chip DSP as required according to the specific needs andto pick up relative data, and then forwarding the required result through PCI bus to computer for processing to finish the interface function.

Description

1. Technical field [0001] The present invention is a method for making an audio and video synchronous real-time capture and compression card, which adopts the international advanced MPEG-1 image compression technology, performs real-time synchronous input, real-time synchronous preview and real-time synchronous compression for simulated images and sounds, and can The audio and video data is analyzed and processed, and the compressed data is stored in various digital storage media, which belongs to the data processing component category. 2. Background technology [0002] Some digital audio and video cards on the market currently have many defects or deficiencies: some are not synchronized with audio and video; some are not real-time acquisition and processing rates; some do not support multi-channel (up to 16) signal input; some occupy CPU resources If it is large, it is easy to cause the system to crash; some previews cannot be controlled (that is, the preview is to output t...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: in order to adapt to the needs of image information transmission in the era of informationization and digitalization, solve the defects and deficiencies in the storage and processing of analog video and audio data, and overcome the inability of similar digital video compression cards to perform AV preview, compression, Insufficient real-time and synchronization of storage and transmission (the so-called real-time means that the input, preview, compression, and recording are completed almost at the same time in time, which is briefly described as parallel synchronous controlled completion)

In short, it completely overcomes the defects of similar products currently on the market, and reduces the cost of use for users, so as to achieve the purpose of large-scale promotion

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