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Method and apparatus for combined mode-dependent and size-dependent block-level restriction of position-dependent prediction

An intra-frame prediction mode and mode technology, which is applied in the field of image processing and can solve the problem of video size becoming a problem.

Active Publication Date: 2022-04-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The size of the video can also be an issue when storing the video in a storage device as memory resources can be limited

Method used

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  • Method and apparatus for combined mode-dependent and size-dependent block-level restriction of position-dependent prediction
  • Method and apparatus for combined mode-dependent and size-dependent block-level restriction of position-dependent prediction
  • Method and apparatus for combined mode-dependent and size-dependent block-level restriction of position-dependent prediction

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Embodiment Construction

[0117] In the following description, reference is made to the accompanying drawings which form a part hereof and which show by way of illustration specific aspects of embodiments of the invention or in which embodiments of the invention may be used. It should be understood that the embodiments of the present invention may be used in other aspects and may include structural or logical changes not depicted in the drawings. Accordingly, the following detailed description should not be read in a limiting sense, and the scope of the invention is defined by the appended claims.

[0118] For example, it should be understood that disclosures related to describing methods are also applicable to corresponding devices or systems for performing the methods, and vice versa. For example, if one or more specific method steps are described, the corresponding device may include one or more units (for example, functional units) to perform the described one or more method steps (for example, one...

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PUM

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Abstract

The present invention provides a method for performing intra-frame prediction on blocks in an image. The method includes: for one pixel among the plurality of pixels of the block, using the intra prediction mode, obtaining the predicted pixel value according to one or more reference pixel values ​​through intra prediction, wherein the frame The intra prediction mode is one of DC intra prediction mode, planar intra prediction mode and angular intra prediction mode; according to the intra prediction mode and the height of the block, the width of the block, and the height of the block and width, determine a first weight; determine a second weight similar to the first weight; by weighting the upper reference pixel value and the left reference pixel value, the additional value is calculated as the weighted sum of the two values; multiplying the predicted pixel value by a pixel weighting factor to obtain a weighted predicted pixel value; adding the weighted predicted pixel value to the additional value to obtain a non-normalized modified predicted pixel value; by An arithmetic right shift is performed on the integer representation of the non-normalized modified predicted pixel value, and the non-normalized modified predicted pixel value is subjected to normalization processing to obtain a normalized modified predicted pixel value.

Description

[0001] Related Application Cross Reference [0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 784,345, filed December 21, 2018. The entire disclosures of the above patent applications are incorporated herein by reference. technical field [0003] Embodiments of the present application (the present invention) generally relate to the field of image processing, and more specifically, relate to intra-frame prediction using position-dependent prediction combinations. Background technique [0004] Video decoding (video encoding and decoding) is widely used in digital video applications such as broadcast digital TV, video transmission over the Internet and mobile networks, real-time session applications such as video chat, video conferencing, DVD and Blu-ray discs, video content acquisition and editing systems and security applications for camcorders. Large amounts of video data need to be described even in the case of short videos, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/50H04N19/14H04N19/82
CPCH04N19/182H04N19/105H04N19/593H04N19/82H04N19/11H04N19/122H04N19/70H04N19/132H04N19/176H04N19/865H04N19/87H04N19/86
Inventor 阿列克谢·康斯坦丁诺维奇·菲利波夫瓦西里·亚历斯维奇·拉夫特斯基陈建乐
Owner HUAWEI TECH CO LTD