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FPGA based four way audio-video multiplexing method

An audio, video and video technology, applied in the field of multimedia network transmission, to achieve the effect of improving utilization, good compatibility, convenient, flexible and multi-purpose compatibility

Inactive Publication Date: 2008-02-20
JILIN UNIV
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a method based on FPGA to realize 4-way audio and video combination, so as to realize simultaneous transmission of multiple audio and video channels on the same channel, which not only solves the problem of multi-channel audio and video input, but also improves the utilization of transmission lines rate and audio and video encoder performance-price ratio

Method used

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  • FPGA based four way audio-video multiplexing method
  • FPGA based four way audio-video multiplexing method

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Embodiment Construction

[0016] The method of the present invention will be further described in detail in conjunction with the examples given below.

[0017] With reference to Fig. 1, 2, the present invention is based on FPGA and realizes the 4-way audio-video combining method, is that 4-way video signals and 4 recording audio signals are input to the FPGA scene through 4 PAL codec chips and 4-way PCM voice coding voice chips respectively After processing by the programmable gate array chip, 4 channels of audio and video signals are combined and outputted. The FPGA chip includes a SDRAM synchronous dynamic random access memory control module, a video output module, a video synchronization generation module, a video clock module, and a 4-way video synchronization detection module. 4-way video judgment storage module, audio clock module, PCM encoding control module, video chip control module, mode setting module.

[0018] The 4-way PAL decoder adopts the SAA7114 chip of PHILIPS company, and this chip u...

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Abstract

The method includes following steps: through PAL encode and decode chip and PCM speech coding chip, 4-ways video signals and 4-ways sound signals are inputted into FPGA chip for processing, and then implements 4-ways combination output of video and sound signal. The steps of signal processing are: the output format of video, input and output mode of clock and synchronous are set for 4-ways video and sound signals through mode setup module; then three branches are parallel processed; first branch is used in setting the register of video chip; second branch is used in combining 4-ways sound; third branch is used in combining 4-ways video.

Description

technical field [0001] The invention belongs to multimedia network transmission technology, and in particular relates to a method for combining multiple audio and video channels on the same channel. Background technique [0002] With the rapid development of the Internet, the demand for its network video products is increasing at a rate of 20% per year. In 2002, the sales of various network video encoders in the world exceeded 10 billion US dollars. However, the amount of network multimedia video transmission data is exploding. The network bandwidth has become the "bottleneck" of information transmission, and the encoder using efficient multi-channel audio and video processing method is one of the effective methods to solve the "bottleneck" problem. With the popularization of my country's network and the development of national information infrastructure construction, multimedia video services will surely become the mainstream of network communication. Saving existing commu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/081
Inventor 王世刚祝宇鸿
Owner JILIN UNIV
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