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Intra-frame prediction method and device based on mathematical statistics and classification training in HEVC

An intra-frame prediction and mathematical statistics technology, which is applied in the fields of digital video signal modification, electrical components, image communication, etc., can solve problems such as affecting prediction performance and rough methods, and achieve good subjective effects, improve prediction accuracy, and increase the proportion of the effect.

Inactive Publication Date: 2014-02-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the existing DC prediction mode in HEVC uses the method of calculating the average value of reference pixels, which does not have a good prediction effect on all blocks
In addition, the method of PLANAR prediction mode using gradient interpolation is also somewhat rough, which affects the prediction performance

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  • Intra-frame prediction method and device based on mathematical statistics and classification training in HEVC
  • Intra-frame prediction method and device based on mathematical statistics and classification training in HEVC
  • Intra-frame prediction method and device based on mathematical statistics and classification training in HEVC

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Embodiment Construction

[0016] The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.

[0017] It should be noted that, in the following description, the DC or PLANAR prediction mode is taken as an example to illustrate the principles of the embodiments of the present invention. However, those skilled in the art can understand that since the PLANAR prediction mode and the DC prediction mode are similar in principle, the content about the DC prediction mode described below with reference to the accompanying drawings can be similarly applied to the PLANAR prediction mode, and vice versa.

[0018] In addition, those skilled in the art can understand that, without departing from the principle and spirit of the present invention, the embodiments of the present invention can also be applied to existing and future prediction modes other than DC and PLANAR Various other prediction modes.

[0019] First, the technical solutions ac...

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Abstract

The invention discloses an intra-frame prediction method and device based on mathematical statistics and classification training in HEVC. The method comprises the following steps that 1, coding parameters are set; 2, training sample data are obtained; 3, PU blocks of a DC mode are classified; 4, reference pixel sample sets and original pixel sample sets are obtained from original frames and serve as training samples; 5, sample training is carried out. Compared with the prior art, the intra-frame prediction method and device based on mathematical statistics and classification training in the HEVC have the advantages that the change distribution of image textures are paid more attention to, the prediction precision of the DC mode and a PLANAR mode is improved, a better subjective effect is achieved at the detailed position of an image background, and at the same time, the proportion of the DC mode and the PLANAR mode is increased.

Description

technical field [0001] The present invention relates to the field of high-performance video coding (HEVC, High Efficiency Video Coding), and more specifically, relates to an intra-frame prediction method and device based on mathematical statistics and classification training in high-performance video coding. Background technique [0002] Since H.264 / MPEG-4AVC was released in 2003, and it has been 9 years, with the continuous improvement of network technology and terminal processing capabilities, people are now widely used MPEG-2, MPEG-4, H.264 And so on, a new requirement is put forward. Hope to be able to provide: 1) HD, 2) 3D, 3) mobile wireless, to meet the application of new fields such as new home theater, remote monitoring, digital broadcasting, mobile streaming media, portable camera, medical imaging, etc. In addition, after the release of H.264 / AVC, after several years of accumulation (development of new technologies such as motion compensation, transformation, inte...

Claims

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Application Information

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IPC IPC(8): H04N19/109H04N19/105H04N19/96H04N19/126H04N19/147
Inventor 魏芳黄慧明
Owner BEIJING UNIV OF POSTS & TELECOMM
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