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Intra-frame image prediction codec method and video codec

A technology of video decoder and video encoder, which is applied in image communication, digital video signal modification, electrical components, etc. The effect of reconstructing image quality, facilitating hardware implementation, and improving the efficiency of intra-frame image encoding and decoding

Inactive Publication Date: 2018-09-07
LG ELECTRONICS (CHINA) R&D CENT CO LTD
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Problems solved by technology

[0003] The existing intra-frame image prediction encoding and decoding method uses the reconstruction value of the adjacent reference pixels of the current transformation unit to predict, but there are the following shortcomings: the accuracy of intra-frame image prediction is not high, resulting in low efficiency of intra-frame image encoding and decoding

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  • Intra-frame image prediction codec method and video codec
  • Intra-frame image prediction codec method and video codec
  • Intra-frame image prediction codec method and video codec

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[0058] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0059] Such as figure 1 As shown, in an embodiment of the present invention, the processing flow of the intra-frame image prediction coding method may include:

[0060] Step 101: Determine adjacent reference pixels used to predict the current transformation unit according to the prediction mode of the current transformation unit;

[0061] Step 102: Calculate the residual value between the reconstructed value of the adjacent reference pixel and the original value;

[0062] Step 103: Perform lossless compression coding on the residual value;

[0063] Step 104...

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Abstract

The invention discloses an intra-frame image predictive encoding and decoding method and a video codec. The intra-frame image predictive encoding and decoding method comprises the following steps that adjacent reference pixels used for predicting a current transformation unit are determined according to a prediction mode of the current transformation unit; residual values of reconstruction values and original values of the adjacent reference pixels are calculated; lossless compression encoding is conducted on the residual values; intra-frame image predictive encoding is conducted on the current transformation unit according to the original values of the adjacent reference pixels. Or the intra-frame image predictive encoding and decoding method comprises the following steps: the adjacent reference pixels used for predicting the current transformation unit are determined according to the prediction mode of the current transformation unit; the residual values of the reconstruction values and the original values of the adjacent reference pixels are calculated; a lossy second encoding is conducted on the residual values, and reconstruction residual values of the adjacent reference pixels are acquired; the reconstruction values and the reconstruction residual values are added, and then reconstruction original values of the adjacent reference pixels are acquired; the intra-frame image predictive encoding is conducted on the current transformation unit according to the reconstruction original values. The intra-frame image predictive encoding and decoding method and the video codec can improve encoding and decoding efficiency of intra-frame images.

Description

Technical field [0001] The present invention relates to the technical field of image video coding and decoding and intra-frame image prediction, in particular to a coding and decoding method of intra-frame image prediction and a video codec. Background technique [0002] Image and video compression coding and decoding are generally divided into two predictive coding and decoding technologies: inter-frame image coding and decoding and intra-frame image coding and decoding. Intra-frame image coding uses information from already-encoded image units in the current frame to predictively encode the current encoded image unit; intra-frame image decoding uses information from decoded image units in the current frame to predictively decode the current decoded image unit. [0003] Existing intra-frame image prediction coding and decoding methods use the reconstructed values ​​of adjacent reference pixels of the current transformation unit to predict, but they have the following shortcomings:...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/105H04N19/44H04N19/593
Inventor 贾杰刘鸿彬
Owner LG ELECTRONICS (CHINA) R&D CENT CO LTD
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