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Coding/decoding method and apparatus for improving video error concealment

A technology of error concealment and coding method, which is applied in the direction of digital video signal modification, television, pulse modulation television signal transmission, etc., can solve the problems of unreachable, error concealment method, etc., and achieve the effect of improving image quality

Inactive Publication Date: 2009-11-11
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this assumption does not hold, its error concealment method does not achieve the desired effect

Method used

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  • Coding/decoding method and apparatus for improving video error concealment
  • Coding/decoding method and apparatus for improving video error concealment
  • Coding/decoding method and apparatus for improving video error concealment

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Embodiment Construction

[0024] The present invention provides an improved error concealment scheme. During encoding, the macroblock to be encoded is divided into one or more sub-units by a specific mode, the best matching area of ​​each sub-unit in this mode is found, and the information of the best matching area is encoded into the code stream. When decoding, if the macroblock is lost or damaged, replace the lost or damaged macroblock with the best matching area of ​​the macroblock, so that the replaced subunit is closer to the original, and the overall image is more natural. The quality can also be significantly improved.

[0025] Because intra-coded macroblocks are more important than other macroblocks, the improved error concealment coding of the present invention can only be performed on I frames in the code stream, intra-frame coded macroblocks on P frames and B frames, so that the maximum Maximize the coding efficiency and achieve better hiding effect. However, this does not limit the presen...

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Abstract

A coding / decoding method and an apparatus for improving video error concealment are provided, wherein the coding method comprises obtaining the relevant information of a mostly matching area for an area, wherein both the mostly matching area and the area are located in the same picture; and coding the relevant information of the mostly matching area into a coded video stream comprising the area. With the error concealment of the present invention, only several bits are required to be added when coding, whereby the whole picture appears more natural during decoding and error concealment, and the picture quality is also significantly enhanced.

Description

technical field [0001] The present invention relates to a video codec method and device, in particular to a codec method and device for improving video error concealment. Background technique [0002] In digital TV (SDTV / HDTV) and multimedia applications, in order to meet different requirements, many video compression standards have emerged, such as MPEG (Motion Picture Experts Group, Motion Picture Experts Group), H.263 and Quicktime and other standards. The main purpose of these standards is to enable the compressed video stream to have a lower bit rate (bit rate) and better quality. However, due to individual or pulsed bit errors (biterrors) in the encoded video stream, that is, bit-stream errors (bit-stream errors), the synchronization of the decoding device often fails, so that decoding cannot be performed until the next synchronization point, so Some image quality may be degraded. [0003] A possible method to avoid image quality degradation is to use error concealme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/50H04N7/26H04N19/895H04N19/593H04N19/89
CPCH04N19/00763H04N19/00781H04N19/00278H04N7/50H04N7/26319H04N19/00357H04N7/26063H04N19/00939H04N7/26244H04N7/68H04N19/00072H04N7/345H04N19/00175H04N7/26154H04N19/176H04N19/119H04N19/147H04N19/61H04N19/593H04N19/192H04N19/895H04N19/159H04N19/625
Inventor 张大庆王进
Owner KONINK PHILIPS ELECTRONICS NV