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Inage predicting encoding method in frame

An intra-frame image and predictive coding technology, which is applied in the field of video and image coding and decoding, can solve the problems of high code stream overhead and high video coding complexity, and achieve the effect of improving efficiency and reducing complexity.

Inactive Publication Date: 2006-06-07
深圳市迪威迅股份有限公司
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Problems solved by technology

[0023] The purpose of the present invention is to overcome the existing H.264 intra-frame chroma predictive coding method with large code stream overhead and high video coding complexity, and to provide a low-complexity intra-frame chroma predictive coding method. And ensure that the subjective and objective video quality will not be significantly reduced

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Embodiment Construction

[0049] The method of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] As shown in FIG. 3 , it is an operation flow chart of an intra image predictive coding method of the present invention. The operation steps of this method include:

[0051] In step 10, the prediction mode of the luma component corresponding to the chroma component is acquired. The spatial domain prediction of the chroma component is performed after the spatial domain prediction of the luma component of the same macroblock, and the prediction mode of the chroma component is mapped by the prediction mode of the luma component of the corresponding position block in the same macroblock. In the existing H.264 intra-frame chroma prediction coding technology, the size of the block used for chroma component prediction is fixed, and the chroma component is uniformly predicted according to 8×8; and in the method of the present inven...

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Abstract

This invention discloses an intraframe image predicted coding method, which contains intraframe brightness predicted coding and chromaticity coding, obtaining a chromaticity predicted mode according to brightness predicted coding in chromaticity predicted coding. Said invention has advantages of effectively reducing complexity of intraframe coding of chromatic component without using distortion rate optimization method to select prediction mode, raising the efficiency to predict chromaticity block pixel value.

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...

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Application Information

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IPC IPC(8): H04N19/593
Inventor 张冬明沈燕飞黄晁林守勋余乐军
Owner 深圳市迪威迅股份有限公司
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