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Frame image brightness predictive coding method

A technology of brightness prediction and coding method, applied in the field of video and image coding and decoding, can solve the problems of high complexity and complexity of coding chips, and achieve the effect of reducing video quality, small impact, and reducing computational load and complexity.

Active Publication Date: 2006-08-02
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

These judgments make the process of luminance predictive coding very complicated, especially when using hardware to realize luminance predictive coding, it will make the complexity of the coding chip very high

Method used

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  • Frame image brightness predictive coding method

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Embodiment Construction

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The intra-frame luminance predictive encoding method generally includes: the step of establishing reference pixel points of the block to be predicted and the step of performing luminance prediction of the block to be predicted according to the reference pixel points. The present invention is to improve the establishment of reference pixel points, combining Figure 4 , in one embodiment of the present invention, the step of establishing the reference pixel point of the block to be predicted includes the following steps:

[0024] a) According to the position information of the block to be predicted, determine the reference pixel point of the block directly above the block to be predicted ( Figure 4 Whether the pixels at positions "A", "B", "C", and "D" in the image) are available.

[0025] If the reference pixel of the immediately prece...

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Abstract

A coding method of brightness prediction for frame-in image includes directly expanding pixel value of reference pixel point on straight top block to obtain pixel value of reference pixel point on straight top block to obtain pixel value of reference pixel point on right top block of block to be predicted when reference pixel point straight top block of block to be predicted is available, directly expanding pixel value of reference pixel point on straight left block to obtain pixel value of reference pixel point on left bottom block of block to be predicted when reference pixel point on straight left block of block to be predicted is available.

Description

technical field [0001] The invention belongs to the field of video and image coding and decoding, and in particular relates to the coding and decoding technology of images in video frames based on spatial domain prediction. Background technique [0002] Video coding is a hot issue in the field of computer science, which aims to find the most efficient coding format of digital video. In video coding, video images are often divided into intra-frame images and inter-frame images. Among them, the video coding of the intra-frame image only uses the information provided by the image itself for spatial prediction, its codec does not depend on other images, and can be decoded independently; while the coding of the inter-frame image needs to eliminate the video in the temporal domain. redundant information, its codec depends on one or more images preceding it. When performing video coding on an intra-frame image, because in the intra-frame image, pixels of adjacent image blocks hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N19/573
Inventor 张冬明沈燕飞林守勋黄晁余乐军
Owner HUAWEI TECH CO LTD