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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  • 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...

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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 device for video images, belonging to the field of video codec processing. The invention includes extracting a luminance component from a video image, determining a distortion metric value, obtaining a first threshold and a second threshold corresponding to the video image according to the distortion metric value, determining a control parameter according to the first threshold and the second threshold, and based on the control parameter The video image is encoded to obtain an encoded video image. By using just perceivable error, it overcomes the problem of weak estimation of JND threshold in disordered regions in previous JND models, effectively eliminates spatial redundancy in video sequences, reduces coding amount, and improves coding efficiency. At the same time, the obtained luminance mask and spatial mask are used to estimate the JND of the ordered area more accurately, so as to better improve the perceived quality of the ordered area in the video and improve the overall viewing experience of the video.

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
CPCH04N19/147H04N19/154H04N19/186H04N19/19
Inventor 郑喆坤于胜韬陈瑶林桥洲
Owner XIDIAN UNIV
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