Acceleration method, apparatus and system of webp compression algorithm at intra-frame prediction stage

Abstract

The invention discloses an acceleration method, apparatus and system of a webp compression algorithm at the intra-frame prediction stage, and is used for a data center server. The method includes: obtaining a picture with a webp format at a CPU terminal, dividing the picture into macro-blocks of the preset size, and recording position information thereof; selecting a to-be-predicted macro-block as a current block, determining whether the coded macro-block exists at the preset surrounding position of the current block according to the position information of the current block, and if yes, sending the current block and the coded macro-block to a computing chip; performing a plurality of preset prediction calculations by the computing chip according to the current block and the coded macro-block, obtaining a prediction result of each prediction calculation and distortion rates, and sending the prediction results and the distortion rates to the CPU; selecting the prediction result corresponding to the prediction calculation with minimum distortion rate as the code of the current block; and selecting the next current block in a continuous manner until the coding of all the macro-blocks in the picture is completed. According to the method, apparatus and system, logic judgment and vector calculation are distinguished and are separately processed by different chips so that the speed of intra-frame prediction is fast.

Description

technical field [0001] The present invention relates to the technical field of picture intra-frame prediction, in particular to an acceleration method, device and system for the intra-frame prediction stage of a webp compression algorithm. Background technique [0002] In the era of Internet +, according to incomplete statistics, picture data accounts for about 60% of the total Internet traffic, and the transmission of massive picture data increases network delay. The WebP image format is an image compression format that uses a complex compression algorithm in exchange for a higher compression rate. [0003] In the entire WebP compression process, intra-frame prediction is an important stage. The purpose of intra-frame prediction is to encode each macroblock obtained after the picture is divided. In this process, complex logic judgments and a large number of vector calculation operations are required due to the processing of multiple prediction modes, while the traditional ...

AI Technical Summary

Problems solved by technology

In this process, due to the processing of multiple prediction modes, complex logic judgments and a large number of vector calculation operations are required, and the traditional CPU cannot well realize high-speed parallel computing, and the processing speed is slow.

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