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Coding method and apparatus for video images

A technology of video image and encoding method, which is applied in the field of video encoding and decoding processing, and can solve the problems of reducing encoding efficiency, not fully considering the visual characteristics of human eyes, and being unable to adapt to processing, etc.

Inactive Publication Date: 2016-07-27
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the existing technology did not fully consider the visual characteristics of the human eye, resulting in the encoding process being unable to perform adaptive processing according to the video content, resulting in an excessively large amount of encoding calculations and reducing the encoding efficiency

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  • Coding method and apparatus for video images
  • Coding method and apparatus for video images
  • Coding method and apparatus for video images

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Embodiment 1

[0088] The present invention provides a coding method for video images, such as figure 1 As shown, the encoding method for video images includes:

[0089] 11. Extract a luminance component from the video image, and determine a distortion metric based on the luminance component.

[0090] 12. Acquire a first threshold and a second threshold corresponding to the video image according to the distortion metric value.

[0091] 13. Determine a control parameter according to the first threshold and the second threshold.

[0092] 14. Encode the video image based on the control parameter to obtain an encoded video image.

[0093] In practice, in order to solve the defect that content adaptation cannot be performed in the existing coding technology, resulting in low coding efficiency, the present invention provides a coding method for video images, in which the distortion measurement value is obtained, based on the distortion measurement Value decomposes video frames into ordered and ...

Embodiment 2

[0204] This embodiment provides a coding device 2 for video images, such as figure 2 As shown, the encoding device for video images includes:

[0205] An extraction unit 21, configured to extract a luminance component from a video image, and determine a distortion metric value based on the luminance component;

[0206] An acquisition unit 22, configured to acquire a first threshold and a second threshold corresponding to the video image according to the distortion metric value;

[0207] A processing unit 23, configured to determine a control parameter according to the first threshold and the second threshold;

[0208] The control unit 24 is configured to encode the video image based on the control parameter to obtain an encoded video image.

[0209] In practice, in order to solve the defect that content adaptation cannot be performed in the existing coding technology, resulting in low coding efficiency, the present invention provides a coding method for video images, in whi...

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Abstract

The invention discloses a coding method and apparatus for video images, and belongs to the field of video coding and decoding processing. The method comprises extracting brightness components from the video images, determining distortion magnitude, according to the distortion magnitude, obtaining a first threshold and a second threshold which are corresponding to the video images, according to the first threshold and the second threshold, determining control parameters, and obtaining coded video images by coding the video images based on the control parameters. Through utilization of a just-noticeable-difference (JND), the problem of weak estimation of a JND threshold of a disordered area in a conventional JND model is overcome, space redundancy in a video sequence is effectively eliminated, the coding amount is reduced, and the coding efficiency is improved. At the same time, a JND in an ordered area is more accurately estimated by use of an obtained brightness mask layer and a space mask layer, the perception quality of the ordered area in a video can be better improved, and the overall watching feel of the video is improved.

Description

technical field [0001] The invention belongs to the field of video coding and decoding processing, and in particular relates to a coding method and device for video images. Background technique [0002] High-Dynamic Range (HDR) video will be the next big thing in TV. HDR video can greatly expand the contrast and color at the same time, the bright parts of the picture will be brighter, so that it looks more "depth"; and the expansion of color can make red, green, blue and all colors in between appear Brighter and purer. In order to provide high-quality visual effects while reducing the bit rate, the coding of high dynamic range (HDR) video is called the key research object in the field of current video technology. [0003] Since the final recipients of most video encoding transmissions are humans, and encoding and transmitting information that cannot be detected or not interested by human eyes is a waste of network bandwidth, video encoding algorithms should consider the Hu...

Claims

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Application Information

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IPC IPC(8): H04N19/147H04N19/186H04N19/19H04N19/154
CPCH04N19/117H04N19/124H04N19/147H04N19/154H04N19/186H04N19/19
Inventor 郑喆坤于胜韬陈瑶林桥洲
Owner XIDIAN UNIV
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