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Video coding system based on vision characteristic

A technology of video coding and visual characteristics, applied in the field of video coding and decoding, it can solve the problems of low visual sensitivity and achieve the effect of low complexity

Inactive Publication Date: 2010-05-19
WUHAN UNIV
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Problems solved by technology

The farther the projection is from the fovea, the less visually sensitive it is

Method used

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  • Video coding system based on vision characteristic
  • Video coding system based on vision characteristic
  • Video coding system based on vision characteristic

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment:

[0041] The video coding system based on visual characteristics provided by the present invention specifically adopts the following technical solutions, see figure 1 , consisting of the following components:

[0042] ① The minimum perceptible distortion threshold calculation module 1 based on the degree of attention in the transform domain, which further includes the attention point extraction submodule 11, the attention degree modulation factor calculation word module 12, the minimum perceivable distortion threshold calculation submodule 13, and the attention-based The minimum perceivable distortion threshold calculation submodule 14;

[0043] Wherein, the degree of attention modulation factor calculation word module 12 is used to calculate the degree of attention modulation factor by calculating the block of the image and the eccentricity between t...

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Abstract

The invention relates to the technical field of coding and decoding of videos, in particular to a video coding system based on vision characteristics. The video coding system comprises an attention-based minimal perceptible distortion threshold value calculating module of a converting domain and a coding module, wherein the attention-based minimal perceptible distortion threshold value calculating module comprises an attention point extracting submodule, an attention modulating factor calculating submodule, a minimal perceptible distortion threshold value calculating submodule and an attention-based minimal perceptible distortion threshold value calculating submodule; the coding module comprises a space / time prediction coding submodule, a converting submodule, a converting domain filter submodule, a quantizing submodule, an entropy coding submodule and a rate distortion optimizing submodule. By establishing a Foveated JND model of a DCT domain and applying the model to a filter and rate distortion optimizing module of the DCT domain in a video coding frame, the invention greatly reduces the coding rate under the condition of keeping unchanged subjective quality.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a video encoding system based on visual characteristics. Background technique [0002] The current typical video coding method is a transform / prediction-based hybrid coding framework based on digital signal processing theory and Shannon information theory. However, the development of this technical framework has encountered a huge bottleneck. The improvement of its coding efficiency mainly depends on the substantial increase in complexity. If this idea continues, it is difficult to have a large room for improvement. [0003] The fundamental purpose of video coding is to provide high-quality visual effects while reducing the bit rate. Coding and transmitting information that human vision cannot perceive or is not interested in is a waste of network bandwidth and terminal equipment. Just-noticeable difference (JND) refers to the maximum distortion of an...

Claims

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Application Information

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IPC IPC(8): H04N7/30H04N7/26H04N19/61H04N19/625H04N19/80
Inventor 胡瑞敏夏洋苏引胡金晖黄振坤钟睿
Owner WUHAN UNIV
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