Video image coding method and device

A technology of video image and coding method, which is applied in the direction of image communication, digital video signal modification, electrical components, etc., can solve the problems of high complexity in the coding process and low performance of subjective video coding, so as to reduce visual redundant information and improve subjective Video coding performance, effect of reducing coding complexity

Inactive Publication Date: 2015-02-25
CHINA SECURITY & FIRE TECH GRP +1
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Problems solved by technology

[0007] Embodiments of the present invention provide a method and device for encoding video images, which are used to solve the problem of high complexity in the encoding process when the gener

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  • Video image coding method and device

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Embodiment Construction

[0031] In order to solve the problems in the prior art that when the video encoding JND model encodes video images, the generated encoded data contains visual redundant information, the encoding process has high complexity, and the subjective video encoding performance is low. In the embodiment of the present invention, effective block classification is performed on the video image corresponding to the current frame, and the brightness modulation factor is introduced into the pixel-level JND value of the traditional DCT domain to obtain the pixel-level JND value of the DCT domain. In the process of QP offset, there is no need to use the canny operator, thereby reducing the encoding complexity; and, in the process of encoding video images, considering the visual characteristics of the human eye, adding block level when obtaining macroblock level QP The visual sensitivity factor further reduces the visual redundant information of the data generated after encoding the video image,...

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Abstract

The invention discloses a video image coding method and device. The method and the device are used for solving the problems that in the prior art, when a video coding JND model is used for coding a video image, generated data after coding is carried out comprise vision redundant information, the complexity of the coding process is high, and the subjective video coding performance is low. According to the method and the device, effective block classification is carried out on a video image corresponding to the current frame, luminance modulation factors are introduced into a pixel-level JND value of a traditional DCT region for obtaining the pixel-level JND value of the DCT region, in the process of obtaining macro-block level QP offset, canny operators do not need to be used, and therefore the coding complexity is reduced; moreover, in the coding process of the video image, the visual characteristic of the human eyes is taken into consideration, and block level vision sensitivity factors are added when a macro-block level QP is obtained, so that vision redundant information of generated data after the video image is coded is reduced, and the subjective video coding performance is improved.

Description

technical field [0001] The invention relates to the field of video data processing, in particular to a video image encoding method and device. Background technique [0002] In order to save transmission bandwidth and storage space, and support applications such as digital TV broadcasting, remote monitoring, digital video on demand, and wireless multimedia communication, video image coding has become one of the hot spots in research and industrial applications at home and abroad. The coding techniques involved in current video image coding standards mainly include: intra prediction, inter prediction, transformation, inverse transformation, quantization, inverse quantization, and entropy coding. [0003] JND (Just Noticeable Distortion; Just Noticeable Distortion model) as a subjective visual coding model can effectively improve the efficiency of video image coding and the quality of video images. Can perceive noise above a certain threshold, which is the just detectable dist...

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Application Information

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IPC IPC(8): H04N19/176H04N19/186H04N19/625H04N19/154
Inventor 贾惠柱向国庆
Owner CHINA SECURITY & FIRE TECH GRP
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