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Adaptive coding-decoding method and system based on random offset quantization multiple description coding

A multi-description coding and multi-description technology, applied in the field of communication, can solve the problems of image block effect and non-adaptive reconstruction process

Active Publication Date: 2018-01-09
SHANDONG NORMAL UNIV
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Problems solved by technology

[0006] In the existing multi-description coding, the reconstruction process cannot be self-adaptive so as to reproduce the better prediction mode of the image, thus causing the final restored image to have a block effect. Therefore, it is necessary to propose an improved coding and decoding scheme

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  • Adaptive coding-decoding method and system based on random offset quantization multiple description coding
  • Adaptive coding-decoding method and system based on random offset quantization multiple description coding
  • Adaptive coding-decoding method and system based on random offset quantization multiple description coding

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[0090] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0091] 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.

[0092] 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 the...

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Abstract

The invention relates to the technical field of communication, in particular to an adaptive coding-decoding method and system based on random offset quantization multiple description coding. The multiple description coding method comprises the following the following steps: acquiring image information; and partitioning the image information into three subsets or nine subsets. Different descriptionmethods are generated specific to two subsets, two prediction modes are adopted for predicting and coding in each description method, and a prediction mode with high reconstruction quality is selected to serve as a final prediction method in order to output code streams of corresponding descriptions. The multiple description method comprises the step of performing lapped transformation, DCT (Discrete Cosine Transformation), optimal reconstruction and random offset quantification based on a time domain on a plurality of subsets in sequence.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an adaptive reconstruction method and system based on random offset quantization and multiple description coding. Background technique [0002] Both the Internet and wireless communication networks are unreliable transmission channels: on the one hand, because the Internet has strong heterogeneity, users can connect to the network anytime and anywhere through wired or wireless methods, and different users are different in terms of CPU computing power and external communication. There are great differences in device performance, and the subnets through which users access the Internet are also different in terms of physical media, bandwidth resources, and transmission delays. Even the network transmission status of the same user in different time periods is also different. The heterogeneity of the Internet and the characteristics of multi-user shared channels determine its b...

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Application Information

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IPC IPC(8): H04N19/103H04N19/117H04N19/119H04N19/122H04N19/124H04N19/13H04N19/159
Inventor 孟丽丽宗京秀谭艳艳张佳任玉伟梁成刘丽张化祥
Owner SHANDONG NORMAL UNIV
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