Video Compression Method and Device Based on Just Perceptible Distortion Model

A technology for detecting distortion models and video compression, applied in digital video signal modification, image communication, electrical components, etc., can solve problems such as insufficient compression gain, unconsidered quantization effect, etc., and achieve the effect of removing visual redundancy and large compression gain

Active Publication Date: 2022-07-01
SHENZHEN UNIV
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Problems solved by technology

[0003] Most of the existing coding methods using the JND model based on DCT transform remove invisible high-frequency information from the input before coding to improve coding efficiency, but the quantization effect is not considered in this process, and the obtained compression gain insufficient

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  • Video Compression Method and Device Based on Just Perceptible Distortion Model
  • Video Compression Method and Device Based on Just Perceptible Distortion Model
  • Video Compression Method and Device Based on Just Perceptible Distortion Model

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Embodiment Construction

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] It should be noted that the descriptions involving "first", "second", etc. in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical so...

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Abstract

The present invention provides a video compression method and device based on a perceptible distortion model. The method includes, after a video frame is input, dividing the image into blocks and performing DCT transformation to obtain a spectrogram corresponding to each image block, Then calculate the texture complexity T of each image block; according to the texture complexity T of each image block, without considering the quantization distortion, calculate the JND corresponding to each image block 0 value; according to JND 0 The JND value corresponding to each image block is calculated under the premise of considering the quantization distortion; according to the JND value corresponding to each image block, the video frame is encoded and preprocessed, and the DCT coefficient value at the corresponding position of the video frame is reduced. , remove the visual redundancy in the video frame, and obtain the encoded video frame. The beneficial effect of the present invention is that the visual redundancy in the video can be effectively removed, a larger compression gain can be obtained, and it is more in line with the characteristics of the human visual system.

Description

technical field [0001] The present invention relates to a video compression method and device, in particular to a video compression method and device based on a perceptible distortion model. Background technique [0002] Nowadays, people's lives are inseparable from video devices such as smartphones, digital cameras and UHD TVs. People's demand for high-definition images / videos is getting stronger and stronger, and massive amounts of image / video data are being transmitted on the Internet all the time. , which requires very large bandwidth and storage space, it becomes very important to develop image / video compression techniques that can reduce the size of data files without seriously degrading their subjective visual quality. In view of this demand, a new video coding standard, called High Efficiency Video Coding (HEVC), has recently been developed and is becoming more and more popular due to its high coding efficiency. However, it becomes more and more difficult to achieve...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/625
CPCH04N19/176H04N19/625
Inventor 王妙辉王树康
Owner SHENZHEN UNIV
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