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Multi-description coding method, multi-description decoding method and multi-description coding and decoding system based on KSVD (K singular value decomposition)

A multi-description coding and multi-description technology, applied in the field of communication, can solve problems such as visual degradation

Inactive Publication Date: 2018-09-28
SHANDONG NORMAL UNIV
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Problems solved by technology

Due to its good compression characteristics and relatively simple implementation, this block-based discrete cosine transform (DCT) has become one of the most popular image processing transform techniques, but it has a disadvantage that the DCT transform coding has certain limitations at low bit rates. The block effect will cause serious visual degradation

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  • Multi-description coding method, multi-description decoding method and multi-description coding and decoding system based on KSVD (K singular value decomposition)
  • Multi-description coding method, multi-description decoding method and multi-description coding and decoding system based on KSVD (K singular value decomposition)
  • Multi-description coding method, multi-description decoding method and multi-description coding and decoding system based on KSVD (K singular value decomposition)

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[0077] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0078] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0079] A typical embodiment of the present invention is a KSVD-based multi-description encoding method, comprisi...

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Abstract

The invention discloses a multi-description coding method, a multi-description decoding method and a multi-description coding and decoding system based on KSVD (K singular value decomposition). The multi-description coding method comprises the steps of obtaining image information, dividing the image information into two subsets: a first subset and a second subset, and generating first descriptionand second description, wherein the two pieces of description comprise the first subset and the second subset at the same time; for the first description, on the basis of a multi-description method, predicting the second subset through adoption of the first subset, carrying out entropy coding according to the first subset and a predicted value of the second subset, and outputting a first multi-description bit stream; and for the second description, on the basis of the multi-description method, predicting the first subset through adoption of the second subset, carrying out entropy coding according to the second subset and the predicted value of the first subset, and outputting a second multi-description bit stream, wherein the multi-description method comprises the step of carrying out timedomain-based lapped transform, KSVD transform and quantization processing on the two subsets in sequence.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a KSVD-based multi-description encoding and decoding method and system. KSVD (K singular value decomposition) is a dictionary training method based on singular value decomposition, which uses the constructed redundant dictionary to adaptively sparsely represent the image, so that the obtained transformation coefficients have a higher degree of sparsity, which can be more effective Represents the structural features of an image. Background technique [0002] With the development of communication technology, the real-time transmission of information on the network is more and more used in daily life, but the current Internet and wireless communication environment often cause errors, packet loss or delay in the transmitted information. , in order to improve the reliability of network transmission, people usually carry out transmission preprocessing such as compression coding...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/109H04N19/117H04N19/124H04N19/13H04N19/60H04N19/91
CPCH04N19/13H04N19/109H04N19/117H04N19/124H04N19/60H04N19/91
Inventor 孟丽丽孙桂娜刘丽谭艳艳张佳张化祥
Owner SHANDONG NORMAL UNIV
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