Video compression coding-decoding method

Abstract

A compressing encoding and decoding method which includes the following: encode the video compressed signals with the programs, discrete cosine transform DCT; transform and quantitate; set the channel buffer storage before the encoding bit flow gets into the channel; the buffer storage must have a control mechanism; movement estimate; the position excursion is described by the movement vector, and a movement vector represents the displacement in the two actinic and vertical directions; as movement estimating, the P frame image uses the former most recent decoded I frame or P frame as the referenced image called the forward forecast; the movement compensation; the movement vector calculated by the movement estimate moves the macro piece in the referenced image to the corresponding position in the actinic and vertical direction, then namely produce the forecast to the compressed image; and search and calculate the subpels; the quantitation, storage and movement search after the sampling signals are made the discrete cosine transform DCT transform are all completed in the frequency field. The video encoder finishes all the calculation in the frequency field. The compressed rate is high, and the calculating quantity is small.

Description

1. Technical field [0001] The invention relates to a video compression coding algorithm and an AVCS video conferencing system based on the algorithm. 2. Background technology [0002] At present, similar video conferencing terminals in foreign countries generally use coding technologies such as H.263 and H.264. Products using H.263 have low computational complexity, are easy to implement on low-cost hardware, and have low production costs, but at the same time, such products have a low compression rate for video data and occupy a large bandwidth , which increases the network operating cost; products using H.264 have a very high compression ratio and occupy less network resources, but it is accompanied by extremely high computing overhead, making this type of product dependent on the cost-effective High hardware platform. [0003] In 1995, after completing the formulation of the H.263 standard, the Video Coding Experts Group (VCEG) of the ITU developed a new low-bit-rate vi...

AI Technical Summary

Problems solved by technology

However, existing methods do not focus on solving the problem of computational load

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