Video coding and decoding method and device

A video codec and video coding technology, which is applied in the field of video image information processing, can solve the problems of low compression efficiency of the wavelet transform coding algorithm framework, large delay and buffer requirements, and lack of development and application. Effects of Domain Affinity, High Compression Efficiency, and Scalable Fault Tolerance
CN102006483AActive Publication Date: 2011-04-06ZTE CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2011-04-06

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Abstract

The invention discloses video coding and decoding method and device, wherein the video coding and decoding method comprises the following steps of: dividing different subbands for an input video image by adopting wavelet transform; coding lowest-frequency subbands of each frame of the video image to form a lowest-frequency subband code stream, and respectively and independently coding high-frequency subbands to form a high-frequency subband code stream; merging and packing the obtained code streams to form a merged code stream, and then outputting; respectively resolving the lowest-frequency subband code stream and the high-frequency subband code stream from the input merged code stream according to a code stream merging and packing method of a coding end; respectively carrying out corresponding decoding operation on the lowest-frequency subband code stream and the high-frequency subband code stream to obtain a reconstructed image of the lowest-frequency subbands and a reconstructed image of various wavelet-domain high-frequency subbands according to a coding method the lowest-frequency subbands and the high-frequency subbands; and carrying out inverse wavelet transform to obtain a decoding reconstructed image of the integral video image. The invention can be used for carrying out gradable real-time coding and decoding operation with good fault tolerance performance on the video image.
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Description

technical field

[0001] The invention relates to video image information processing, in particular to a video encoding and decoding method and device. Background technique

[0002] With the continuous development and popularization of third-generation (3G) video services, people have higher and higher requirements for video call quality, and video compression coding technology is also becoming more and more important. Therefore, improving coding compression efficiency, reducing complexity, improving error tolerance performance, and improving grading ability have become the driving force and goal of the development of video compression coding technology.

[0003] As far as the current development of video compression coding technology is concerned, it is divided into two categories according to whether it is internationally standardized: one is an international standard formulated by two international standard organizations, such as the International Telecommunication Union Te...

Claims

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