A broadcast digital video and audio collection and playing PCI extension card

Abstract

The invention discloses a broadcasting digital video-audio collection and broadcasting PCI extension card in broadcast television device field, which is composed of following modules: a digital audio transmitting and receiving module, a digital video input processing module, a digital video output processing module, a generating module in synchronization with clock signal, a control logic and data path module, a video-audio buffer memory module and a PCI bus interface module. The invention receives and transmits video-audio input signals reliably, has low occupancy rate for computer CPU during the data transmission process, because in the collection and broadcasting process the invention does not adopt code rate compression technique to signals, the interface is a highlevel breakeven digital video-audio computer transmission interface, the invention has the advantages of simple structure, high reliability, low cost, flexible utilization, easy to update and maintain, can be used in the enviroment which is strict in cost and reliability, has better use value and wider market prospect.

Description

technical field [0001] The invention relates to a PCI expansion card for collecting and playing out broadcast-level digital video and audio in the field of broadcasting and television equipment. Background technique [0002] In the field of broadcasting and television, there are a large number of applications that require digital processing of multimedia information, including storage, broadcasting, and editing of multimedia materials. These applications involve the collection / broadcasting, compression, scaling, mixing, and special effects of video and audio information. , audio information collection / broadcasting, compression, mixing and other processing. The traditional solution is to use specially designed hardware circuits for related processing, which is often expensive, poor in flexibility, and high in installation and maintenance costs. With the improvement of computer processing capabilities, many video and audio processing tasks can be completed by software on a ge...

AI Technical Summary

Problems solved by technology

The traditional solution is to use specially designed hardware circuits for related processing, which is often expensive, poor in flexibility, and high in installation and maintenance costs

With the improvement of computer processing capabilities, many video and audio processing tasks can be completed by software on a general-purpose computer platform. With the development of multimedia processing technology, more and more computer video and audio processing systems use digital video and audio signal expansion card interface In order to eliminate the influence of analog / digital and digital / analog conversion process on signal quality and improve signal transmission and processing quality, but the same type of products on the market currently have disadvantages such as high price, complex structure, difficult upgrade and maintenance, etc.

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