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Method and apparatus for encoding and decoding in inter mode based on multiple scanning

一种帧内模式、基本编码单元的技术，应用在电视、电气元件、脉冲调制电视信号传输等方向，能够解决丢失、低峰信噪比等问题

Inactive Publication Date: 2006-04-05
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0037] Therefore, if an MB contains errors (caused by the encoder or transmission), then the left MB in such a slice or frame is also lost due to the erroneous transmission and has a low PSNR

Method used

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  • Method and apparatus for encoding and decoding in inter mode based on multiple scanning
  • Method and apparatus for encoding and decoding in inter mode based on multiple scanning
  • Method and apparatus for encoding and decoding in inter mode based on multiple scanning

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Embodiment Construction

[0072] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0073] exist Figure 4 In , an encoding order in a multi-scan-based intra mode according to an embodiment of the present invention will be described.

[0074] First, in operation 410, an input image is divided into basic coding units including blocks of a predetermined size. Here, the basic coding unit including blocks of a predetermined size may be a 16×16 macroblock (MB) or another MB in the form of M×N (M>1, N>1, where M and N are integers).

[0075] Next, in operation 420, at least one of the basic coding units is scanned. In this embodiment, raster scanning is adopted, which is a common scanning method. Raster scan scans from left to right and top to bottom. ...

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Abstract

Provided are a method and apparatus for encoding and decoding in an inter mode based on a multiple scanning through which efficiency of the inter mode is improved by using a spatial relationship within a frame and obtaining estimation information from numerous references. The method includes dividing an input image into basic encoding / decoding units including predetermined sized blocks, scanning at least one of the basic encoding / decoding units, determining whether references for motion estimation of a current basic encoding / decoding unit can be used as references to encode / decode the current basic encoding / decoding unit, and selectively encoding / decoding the current basic encoding / decoding unit according to a result of the determination. A decoded previous frame or blocks decoded before the final scan of a current frame is used the references for motion estimation.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2004-0077724 filed with the Korean Intellectual Property Office on Sep. 30, 2004, the entire disclosure of which is hereby incorporated by reference. technical field [0002] The present invention relates to a method and apparatus for encoding and decoding in intra-mode, and more particularly, to a method and apparatus for encoding and decoding in multi-scan-based intra-mode, in which In the multi-scan-based intra mode, encoding and decoding orders are set according to whether a reference for motion estimation can be used as a reference for encoding / decoding. Background technique [0003] Recently, the codecs of Moving Picture Experts Group (MPEG)-2, MPEG-4 and H.263 in intra mode use discrete cosine transform (DCT) transformation as a reference. [0004] In the intra mode of H.264, the top macroblock (MB) and / or the left MB are used as references. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/00781H04N19/00278H04N7/26207H04N7/50H04N19/00763H04N7/26244H04N19/00939H04N19/00133H04N7/68H04N7/362H04N7/26111H04N19/00212H04N7/26117H04N19/00533H04N19/00127H04N19/00733H04N7/26335H04N7/345H04N19/132H04N19/134H04N19/157H04N19/176H04N19/44H04N19/51H04N19/593H04N19/61H04N19/895
Inventor 张志明
Owner SAMSUNG ELECTRONICS CO LTD