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Method and system for multi-description encoding and decoding of time-domain lapped transform based on jnd

An overlapping transformation and multi-description 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: 2019-05-28
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 visual characteristics. This is not advisable. After all, in most cases, the human eye is The final recipient of the image, so we can and it is very necessary to use the characteristics of human vision to optimize the encoding algorithm

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  • Method and system for multi-description encoding and decoding of time-domain lapped transform based on jnd

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[0076] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[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 the...

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Abstract

The invention relates to a time domain overlap transformation multi-description coding and multi-description decoding method and system based on JND (Just Noticeable Difference). 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, generating a first description and a second description at the same time, wherein the two descriptions 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 prediction value of the second subset, and outputting a first multi-description code 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 prediction value of the first subset, and outputting a second multi-description code stream, wherein the multi-description method comprises the step of carrying out time domain-based overlap transformation, DCT, JND-based threshold filtering and quantization processing on the two subsets in sequence.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a JND-based method and system for multi-description encoding and decoding of overlapping transform in time domain. 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 determ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/39
CPCH04N19/39
Inventor 孟丽丽宗京秀张佳万文博季辉王春静孙建德
Owner SHANDONG NORMAL UNIV
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