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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

Active Publication Date: 2011-04-06
ZTE CORP
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Problems solved by technology

However, compared with the DCT coding framework, the wavelet transform coding algorithm framework has the defects of low compression efficiency and high computational complexity, and the delay and buffer requirements of the framework 3) are relatively large, so they have not been well developed. and application

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  • Video coding and decoding method and device
  • Video coding and decoding method and device

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Embodiment Construction

[0035] The basic idea of ​​the present invention is to use wavelet transform to divide the input video image into different subbands, encode the divided subbands based on the DCT hybrid coding algorithm framework, and adopt the corresponding decoding method according to the coding method. In this way, the advantages of high compression efficiency and low complexity based on the DCT hybrid coding algorithm are fully utilized, as well as the multi-resolution analysis characteristics and error-tolerant characteristics of wavelet transform, to achieve real-time, high-quality video images, scalable and good error-tolerant performance video codec method.

[0036] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention includes two parts, an encoding method and a decoding method....

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/30H04N21/236H04N7/54H04N19/44H04N19/625H04N19/63
Inventor 左雯王宁郭秀江于培松卓力李晓光田卫
Owner ZTE CORP
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