Video compression method and device based on just noticeable distortion model

A technology for perceiving distortion models and video compression. It is applied in the fields of digital video signal modification, image communication, electrical components, etc. It can solve the problems of not considering the quantization effect and insufficient compression gain, and achieve the effect of removing visual redundancy and large compression gain.

Active Publication Date: 2021-03-30
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 b...

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  • Video compression method and device based on just noticeable distortion model
  • Video compression method and device based on just noticeable distortion model
  • Video compression method and device based on just noticeable distortion model

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Embodiment Construction

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

[0054] It should be noted that the descriptions involving "first", "second" and so on 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 quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical ...

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Abstract

The invention provides a video compression method and device based on a just noticeable distortion model. The method comprises the steps: carrying out the DCT after an image is partitioned after a video frame is inputted, obtaining a spectrogram corresponding to each image block, and then calculating the texture complexity T of each image block; according to the texture complexity T of each imageblock, calculating a JND0 value corresponding to each image block on the premise of not considering quantization distortion; according to the JND0 value, calculating a JND value corresponding to eachimage block on the premise of considering quantization distortion; and according to the JND value corresponding to each image block, performing encoding preprocessing on the video frame, reducing a DCT coefficient value of a corresponding position of the video frame, and removing visual redundancy in the video frame to obtain an encoded video frame. The method has the advantages that visual redundancy in the video is effectively removed, larger compression gain is obtained, and the method better conforms to the characteristics of a human eye 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 just perceivable distortion model. Background technique [0002] Nowadays, people's life is inseparable from video devices such as smartphones, digital cameras and UHD TVs. People's demand for high-definition images / videos is becoming stronger and stronger. Massive image / video data is 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 data file size without seriously degrading its subjective visual quality. In view of this need, a new video coding standard recently developed, called High Efficiency Video Coding (HEVC), is becoming more and more popular due to its high coding efficiency. However, it becomes increasingly difficult to achieve further improvements in coding ef...

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Application Information

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IPC IPC(8): H04N19/176H04N19/625
CPCH04N19/176H04N19/625
Inventor 王妙辉王树康
Owner SHENZHEN UNIV
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