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Method and arrangement for encoding and decoding images

An image coding and coding technology, applied in the field of image coding and decoding, can solve the problems of small search range, poor edge position coding quality, and large motion vector error, so as to increase the search range, reduce the prediction vector error, and improve the coding quality. Effect

Active Publication Date: 2008-07-16
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

It can be seen that because the edge position macroblocks in the slice area lack the adjacent block information for prediction, the search range of the edge position blocks is small, and the motion vector error is large, which is commonly called the edge effect. The existence of the edge effect makes Poor encoding quality at edges

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  • Method and arrangement for encoding and decoding images
  • Method and arrangement for encoding and decoding images
  • Method and arrangement for encoding and decoding images

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Embodiment Construction

[0040] In the present invention, in order to reduce the impact of edge effects on the encoding quality, the image can no longer be divided into simple areas, but overlapping divisions, and the image to be encoded can be divided into a plurality of overlapping areas with adjacent strip areas according to the preset direction. Slice regions of regions, where overlapping regions can cover one or more stripes, are then coded individually for each stripe region. Afterwards, image interpolation processing is performed on the overlapped area on the decoding side.

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0042] Fig. 1 is an exemplary flowchart of an image encoding method in an embodiment of the present invention. As shown in Figure 1, the process includes the following steps:

[0043] Step 10...

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Abstract

The invention discloses an image coding method and an image decoding method, comprising the following steps that: the image is divided into a plurality of strip regions with overlapped region with adjacent strip regions, wherein, the overlapped region can cover one or a plurality of strips and each strip region is coded individually; next, the image interpolation process is done on the overlapping region on the decoding side. The invention also discloses an image coding device, an image decoding device and an image coding and decoding device. The technical proposal disclosed by the invention divides the image in an overlapped way instead of simply dividing the image, thereby improving the coding quality at the edge of the strip region.

Description

technical field [0001] The present invention relates to image encoding and decoding technology, in particular to an image encoding method, an image decoding method, an image encoding device, an image decoding device and an image encoding and decoding device. Background technique [0002] Image coding technology is to compress original image information such as digital video in order to achieve more effective transmission and storage; image decoding technology is to analyze and reconstruct encoded video and other image information to obtain a reconstructed image. [0003] In existing coding standards, a hybrid coding architecture based on motion compensation and transform coding is usually adopted. During coding, intra-frame and inter-frame prediction are performed first to obtain predicted values ​​to eliminate the correlation in the time domain; then according to the predicted value and The difference between the actual value of the original image is obtained to obtain the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/50
Inventor 罗奇勇黄建强邓凌
Owner ZHEJIANG UNIVIEW TECH CO LTD
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