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Method and apparatus for encoding and decoding based on intra prediction

An intra-frame predictive coding and intra-frame prediction technology, which is applied in the direction of television, electrical components, and pulse-modulated television signal transmission. It can solve the problem that the compression efficiency is not large enough, and achieve the effect of increasing the compression rate.

Inactive Publication Date: 2009-10-28
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

However, in this case, information about the vector 332 needs to be sent in order to decode the image, so the efficiency of the compression is not large enough

Method used

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  • Method and apparatus for encoding and decoding based on intra prediction
  • Method and apparatus for encoding and decoding based on intra prediction
  • Method and apparatus for encoding and decoding based on intra prediction

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Embodiment Construction

[0033] According to an aspect of the present invention, there is provided a method for encoding based on intra-frame prediction, the method includes: using pre-encoded pixels adjacent to the current block to search for a pre-encoded area in the current picture, and based on the search result, the current performing intra-frame prediction on the block; and performing intra-frame prediction encoding on the current block based on the intra-frame prediction of the current block.

[0034] The step of intra-predicting the current block may include: searching for a precoding region in the current picture by using the precoded pixels adjacent to the current block, and selecting the precoded pixels adjacent to the current block with a low residual error N blocks of pixels; and performing intra prediction on the current block based on at least one of the selected N blocks.

[0035] The step of intra-predicting the current block may include: performing intra-prediction on the current blo...

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Abstract

Provided are a method and apparatus for encoding and decoding based on intra prediction. The method of encoding based on intra prediction includes predicting a current block by searching for a pre-encoded area in a current picture using pre-encoded pixels adjacent to the current block, and intra prediction encoding the current block so that information indicating that the current block is intra predicted via the predicting of the current block is included. Accordingly, the compression rate of intra prediction encoding is increased even when the current block is not appropriately predicted by using a prediction value obtained from pixels adjacent to the current block.

Description

technical field [0001] Methods and apparatus consistent with the present invention relate to encoding and decoding based on intra-frame prediction, and more particularly, to performing frame-by-frame prediction by predicting a current block to be encoded by intra-frame prediction from a block in a pre-coding region in a current picture. Intra-predictive coding. Background technique [0002] In prior art methods of compressing images, such as MPEG-1, MPEG-2 and MPEG-4 H.264 / MPEG-4 Advanced Video Coding (AVC), a picture is divided into macroblocks to encode the image. Each macroblock is then coded using inter prediction and intra prediction. Next, after an appropriate encoding mode is selected by considering the data size of the encoded macroblock and the distortion of the original macroblock, the macroblock is encoded. [0003] In intra prediction, a macroblock of a current picture is coded using pixel values ​​spatially adjacent to the current block to be coded instead of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32
CPCH04N7/26063H04N19/00145H04N19/00751H04N7/26877H04N19/00278H04N19/00763H04N7/26313H04N7/26132H04N7/26244H04N7/34H04N19/00072H04N19/00545H04N19/56H04N19/593H04N19/537H04N19/557
Inventor 韩宇镇李培根李泰美
Owner SAMSUNG ELECTRONICS CO LTD
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