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

A multi-description and inverse quantization technology, applied in the field of communication, can solve problems such as the visual characteristics of the human eye that have not been considered

Inactive Publication Date: 2017-08-08
SHANDONG NORMAL UNIV
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Problems solved by technology

[0005] However, previous image coding algorithms have considered how to improve coding efficiency and image quality from an objective point of view, and have not considered the influence of subjective standards such as human vis...

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

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Embodiment Construction

[0081] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0082] 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.

[0083] 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 a JND-based random offset quantization multiple description coding and decoding method and system. The multiple description coding method comprises the following steps of obtaining image information, dividing the image information into two subsets, respectively taking the two subsets as a first subset and a second subset and simultaneously generating a first description and a second description, wherein the two descriptions simultaneously include the first subset and the second subset; for the first description, adopting the first subset to predict the second subset based on a multiple description method, carrying out entropy coding according to predicted values of the first subset and the second subset and outputting a first multiple description code stream; and for the second description, adopting the second subset to predict the first subset based on the multiple description method, carrying out entropy coding according to the predicted values of the first subset and the second subset and outputting a second multiple description code stream, wherein the multiple description method includes the steps of carrying out lapped transform based on a time domain, DCT transform, JND-based threshold filtering and random offset 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 JND-based random offset quantization multi-description encoding and decoding method and system. 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 best-effort servi...

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Application Information

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IPC IPC(8): H04N19/124H04N19/13H04N19/122
CPCH04N19/122H04N19/124H04N19/13
Inventor 孟丽丽宗京秀谭艳艳任玉伟刘丽梁成张化祥
Owner SHANDONG NORMAL UNIV
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