US 5,737,022 AGranted

Motion picture error concealment using simplified motion compensation

AssigneeKabushiki Kaisha Toshiba

InventorsNoboru Yamaguchi, Hideyuki Ueno

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Abstract

A motion picture image transmission apparatus constructing a motion picture image transmission system for coding and decoding a motion picture signal in the block unit includes an output section for detecting an error of received coded data and outputting a detection signal, an identifying section for identifying a non-decodable block based on the detection signal, a prediction section for subjecting values of pixels near the non-decodable block to motion compensation prediction according to the respective motion vectors and motion compensation methods of a plurality of decodable blocks near the block, a calculating section for calculating motion compensation prediction error values of the results of prediction, a selecting section for selecting a motion vector applied to the non-decodable block from the plurality of motion vectors or the like based on the error value, and a correcting section for correcting a decodable block by motion compensation by use of the selected motion vector or the like.

Claims4

Dependent claims

A motion picture receiving apparatus for receiving information obtained by coding a motion picture signal in the block unit by use of the motion compensation and for decoding the received data in the block unit, comprising:

error detection means for detecting an error of the coded data received and outputting an error detection signal;
identifying means for identifying a block being made non-decodable by the error;
a motion compensation memory for storing data of an identification result of the identifying means and a motion compensation method, and having means for simplifying data of the motion compensation method, and means for storing the motion compensation method simplified by said simplifying means;
a generating section for generating data of the motion compensation method applied to the block being identified to be non-decodable, said generating section comprising means for generating data of the motion compensation method applied to the block being identified to be non-decodable from data of the motion compensation method simplified by said simplifying means by said identifying means from data of a plurality of decodable blocks lying near the block identified to be non-decodable;
and
correction means for correcting the block identified to be non-decodable by said identifying means by said motion compensation method by use of data of said motion compensation method generated by said generating section, said correction means comprising means for correcting the block identified to be non-decodable by said identifying means by the motion compensation by use of data of the simplified compensation method generated by said generating section.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/488,051Filed 7 Jun 1995 · continuation in part
Priority: JP 5-03723326 Feb 1993
Granted: 7 Apr 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04N 19/895
Involving methods or arrangements for detection of transmission errors at the decoder: in combination with error concealment
H04N 19/102
Using adaptive coding: characterised by the element, parameter or selection affected or controlled by the adaptive coding
H04N 19/137
Incoming video signal characteristics or properties: motion inside a coding unit, e.g. average field, frame or block difference
H04N 19/142
Characterised by the element, parameter or criterion affecting or controlling the adaptive coding: detection of scene cut or scene change