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Method and system for intra prediction in image compression

A technology of in-screen prediction and image compression, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as strict data transmission requirements, reduced user perception, and rough images

Inactive Publication Date: 2019-01-15
IND TECH RES INST
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, if a head-mounted display is used to watch a 360-degree panoramic video, the user's eyes are very close to the screen, so the picture becomes rough, which will greatly reduce the user's perception
Therefore, in order to make the picture more detailed, it is necessary to increase the resolution of the picture, and the requirement for the picture update rate must also be increased to 30-90, resulting in more stringent requirements for data transmission.

Method used

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  • Method and system for intra prediction in image compression
  • Method and system for intra prediction in image compression
  • Method and system for intra prediction in image compression

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Embodiment Construction

[0056] Please refer to figure 1 , which shows a schematic diagram of intra prediction of image compression according to an embodiment. When performing intra-frame prediction, the original values ​​V99 of several target pixels P99 of the target coding block B99 are provided first. And, according to a predetermined prediction direction D91, the target prediction value V91 of the target pixel P99 of the target coding block B99 is obtained with the adjacent pixel P91. These target prediction values ​​V91 are also called prediction blocks.

[0057] Next, calculate the difference between the original value V99 and the target predicted value V91 to obtain the residual value V92 of the target coding block B99. These residual values ​​V92 are also called residual blocks. Such as figure 1 As shown, the number of bits of these residual values ​​V92 is low, which can effectively improve the compression efficiency.

[0058] Please refer to figure 2 , which shows a schematic diagram ...

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Abstract

A method and a system for intra prediction in image compression are provided. The method used for performing an intra prediction of a target coding unit includes following steps. A first adjacent prediction direction of a first adjacent coding unit which is adjacent to the target adjacent coding unit is obtained. A second adjacent prediction direction of a second adjacent coding unit which is adjacent to the target adjacent coding unit is obtained. The second adjacent coding unit is different from the first adjacent coding unit. A plurality of target prediction values of a plurality of targetpixels are obtained from the first adjacent coding unit and the second adjacent coding unit at least according to the first adjacent prediction direction and the second adjacent prediction direction.

Description

technical field [0001] The present disclosure relates to an image compression intra-frame prediction method and system. Background technique [0002] With the development of computer hardware, network communication equipment and displays, high dynamic range, virtual reality and 360-degree panoramic videos are getting more and more attention. In order to get a good user experience, the resolution requirements of these videos are usually very high . Moreover, if a head-mounted display is used to watch a 360-degree panoramic video, the user's eyes are very close to the screen, so the picture becomes rough, which will greatly reduce the user's perception. Therefore, in order to make the picture finer, the resolution of the picture needs to be increased, and the picture update rate must also be increased to 30-90, resulting in more stringent requirements for data transmission. As a result, it is necessary to develop a video compression standard with higher compression efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/109H04N19/136H04N19/176
CPCH04N19/109H04N19/136H04N19/176H04N19/597H04N19/593H04N19/11H04N19/159H04N19/182
Inventor 林柏翰林俊隆林敬杰
Owner IND TECH RES INST
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