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Error concealing device and method thereof for video frame

A technology of error concealment and video frame, applied in the direction of digital video signal modification, TV, pulse modulation TV signal transmission, etc., can solve the problems of video data loss, image quality degradation, sprawl, etc.

Inactive Publication Date: 2007-02-21
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, when an error occurs in any one bit of the bitstream, a large amount of video data is lost and the effect of the corrupted image spreads to many subsequent frames
Therefore, if a bit stream transmitted after being encoded by this method is decoded by a decoder, severe degradation of image quality may occur

Method used

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  • Error concealing device and method thereof for video frame
  • Error concealing device and method thereof for video frame
  • Error concealing device and method thereof for video frame

Examples

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Embodiment Construction

[0068] The present invention will now be described more fully with reference to the accompanying drawings, in which examples of the invention are shown

[0069] Example.

[0070] Generally, when an error occurs in a macroblock of a video frame, an error concealment method that detects and conceals the error is used.

[0071] Error concealment methods can be classified into spatial error concealment methods and temporal error concealment methods.

[0072] In the spatial error concealment method, when at least one of the macroblocks above, below, left and right of the macroblock containing the error in the video frame is normal, the normal macroblock is copied, or based on the macroblock containing the error The pixel distance between adjacent macroblocks is used to perform bilinear interpolation.

[0073] will now refer to Figure 5 An interpolation method based on the pixel distance between the upper macroblock and the lower macroblock of the error-containing macroblock wil...

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Abstract

An error concealing device and a method thereof for video frames. The device and method smooth horizontal / vertical edges, which are generated after concealing errors of a macro block in the video frames using a predetermined error concealing method, through a corresponding post-process in order to generate high quality images.

Description

technical field [0001] The present invention relates to an error concealment device for video frames and its method, and more particularly to an error concealment device for video frames and its method, which is used for smoothing errors occurring due to concealing errors generated in video frames Horizontal / vertical edges to provide high-quality images. Background technique [0002] Due to the development of digital signal processing technology, there is now a technology for compressing and transmitting a large amount of moving picture data through a transmission channel with a limited bandwidth. [0003] In moving picture standards such as MPEG, H.261 and H.263, a slice unit is used as a resynchronization unit for channel errors. [0004] A slice is composed of a plurality of macroblocks, and motion compensation coding is performed in units of 16×16-sized blocks in the macroblocks. [0005] Typically, a frame consists of many slices, and the number of slices depends on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/12H04N19/895
CPCH04N19/00781H04N19/00278H04N7/50H04N19/00218H04N7/26244H04N7/26212H04N19/00066H04N7/68H04N7/26058H04N19/00939H04N19/159H04N19/176H04N19/61H04N19/117H04N19/895B05C13/02
Inventor 金成柱
Owner SAMSUNG ELECTRONICS CO LTD