Decoding method and decoder for video code flow crossing multiple strip bands

Abstract

A video code stream cross many bandings decoding method and the equipment, including: initialization current great block exponential i=0; read the input code stream to find the banding of the great block that includes the exponential i=0 and decode the great block; i increase 1, decode the great block if the finding banding include the i=1 great block, otherwise continue to read the input code stream until find the banding with the i=1 great block and decode the great block; estimate the current i increase 1, continue the above steps until finish decoding the current image; the above steps continue the end of the input code stream. The invention broke through the limit of order decode in the code stream according to the banding, realize the accurate cut of the banding and decode according to the great block exponential order that cross many bandings, the decoding process and the post-processing process can the synchronization carry on, that reduce the space of the buffer storage and the delay of the decoding post-processing.

Description

(1) Technical field [0001] The present invention relates to a video code stream decoding device and a decoding method thereof, in particular to a video code stream decoding method across multiple slices and a device thereof. (2) Background technology [0002] Multi-slice group, Flexible Macroblock Ordering and Arbitrary slice order are key technologies used in network environment in video compression standards (such as H.264). [0003] The technology of flexible macroblock sorting of multi-stripe sets is firstly introduced below. [0004] figure 1 It is a schematic diagram of the encoding method of an image by macroblock in the prior art. [0005] Such as figure 1 As shown, in the video compression standard, an image is divided into macroblock (macroblock) groups, and the macroblock MB is a square area with a size of 16x16 (pixels). figure 1 An image in is 176×144 pixels, and the order (address) of macroblock MB in the image is numbered according to the order of raster s...

AI Technical Summary

Problems solved by technology

[0025] For this method, macroblock decoding is not performed in raster scan order, and post-processing after decoding, such as image scaling, enhancement, display, etc., is performed in raster scan order, so the post-processing process can only wait for the entire image to complete It can only be carried out after the decoding is completed, and the post-processing process cannot be synchronized with the decoding process

[0026] The main purpose of adopting flexible macroblock ordering mechanism in source coding is to improve the error recovery capability of communication network, especially IP-based video conferencing, and adopting arbitrary slice order technology can reduce decoding delay in out-of-order transmission network, but this The use of the two technologies alone or together will bring a certain degree of difficulty to the entire decoding work

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