Visual frequency flow coding/decoding method based on ripple convertion

Abstract

The method includes following step: the encoding data is organized into code flow according to frame; each frame is composed of Y,ííU, V three component data ; each component sets different bit plane according to quantized precision; the bit plane message of each component data is organized into component message; three component messages is organized into frame message and forms code flow; for reception end, the frame message can be separated from code flow, the component message can be separated from frame message, each bit plan message can be separated from component message that is decoded, finally the image message can be restored. The invention can cut off code flow at any where and any time.

Description

Technical field [0001] The present invention relates to a coding / decoding method of video images in the field of digital video processing, and in particular to a video stream coding / decoding method based on wavelet transform. Background technique [0002] The Multimedia Technical Specification Committee has established and proposed standards for encoding / compressing audio and video data. This standard includes MPEG1 / 2 / 4 series standards for moving images and H.261 / H.263 standards for low bit rate video communications. [0003] See figure 1 , Which is a schematic flow chart of encoding a video stream in the prior art. The encoding includes the following steps: firstly convert each frame of the video stream into three components Y, U, and V (step S110); then determine that each frame of image is an I frame, P frame or B frame, And perform intra-frame coding or inter-frame coding (S120); finally, organize the code stream according to the code stream structure set by the standard (S...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a video stream encoding / decoding method based on wavelet transform, to solve the problems in the prior art, due to the use of blocks as units to organize into macroblocks, macroblocks as units to organize into block groups, block groups as units The unit is organized into a code stream structure such as an image. Therefore, when the coded data is organized into a code stream according to the above code stream structure, it cannot accurately adapt to the network bandwidth, and the code stream cannot be arbitrarily cut off. When a data error occurs, a certain line in the image cannot be displayed. Technical defects such as correctness

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