Motion vector prediction method and device used for VP9 decoder

Abstract

The invention discloses a motion vector prediction method and device used for a VP9 decoder. The method comprises: first dividing macro-blocks to be predicted into a plurality of sub-blocks, decoding a row or a column of sub-blocks in the macro-blocks, and storing the decoding data of the row or column at a first storage position; and before decoding a next row or column of sub-blocks, determining whether the next row or column of sub-blocks are larger than a preset sub-block, storing the decoding data of the next row or column of sub-blocks at the first storage position if the next row or column of sub-blocks are larger than a preset sub-block, and storing the decoding data of the next row or column of sub-blocks at a second storage position if the next row or column of sub-blocks are not larger than a preset sub-block. The motion vector prediction method and device solve the problems of large register consumption, waste of resources, complicated mapping relation, complex hardware design logic, large hardware area, high power consumption, etc.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a method and device for motion vector prediction of a VP9 decoder. Background technique [0002] With the development of science and technology and the progress of society, VP9 was also born. VP9 is an open-format, royalty-free video compression standard developed by Google. Because VP9 has the characteristics of fast decoding speed in the field of video decoding, VP9 decoders have been widely used. [0003] The VP9 decoder adopts a codec architecture with 64x64 pixels as a macroblock, that is, an image is divided into multiple macroblocks in units of 64x64 pixels, and the video stream data is decoded in units of macroblocks. For each macroblock of 64x64 pixels, it can be further divided into sub-blocks of 64x32, 32x64, 32x32, 32x16, 16x32, 16x16, 16x8, 8x16, and 8x8 pixels. Wherein, the smallest unit of a sub-block is 8x8 pixels. That is to say, a sub-block of 8x8...

AI Technical Summary

Problems solved by technology

[0007] For this reason, it is necessary to provide a technical solution based on motion vector prediction for VP9 decoders, to solve the problem of large register consumption, waste of resources, complex mapping relationships, complex hardware design logic, and hardware problems in the process of predicting motion vectors for VP9 decoders. Problems such as large area and high power consumption

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