Apparatus and method for error correction
AssigneeSamsung Electronics Co., Ltd.
InventorYun-woo Lee
Life of this patent
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Abstract
An apparatus and method for error correction which interleaves by inner codes two fields in one frame during product-coding which is used to correct burst errors, so as to disperse the errors through the two fields (that is, to at least double the correction ability), thereby preventing the deterioration of picture quality which is caused by the errors being restricted to one field when the burst errors occur. Further, the apparatus and method reduce the deterioration of picture quality by smoothly performing a function of error concealment by preventing error concentration even when the errors occur outside the range of error correction ability.
Claims26
An error correction apparatus for use in a digital record/playback apparatus for recording compressed data on a recording medium and reproducing the recorded data from said recording medium, comprising:
- an outer encoder for adding horizontal parity data to compressed block data and encoding a frame;
- a frame interleaving means for alternately arranging in units of inner codes two fields of data in a frame encoded in said outer encoder;
- an inner encoder for adding vertical parity data to the data read out from said frame interleaving means and transmitting the result to the recording medium;
- an inner decoder for correcting errors, within a range of error correction ability, in the data reproduced from the recording medium, adding an error flag to the errors outside the range of the error correction ability, and outputting a result;
- a frame de-interleaving means for detecting a corresponding field of data which is alternatively recorded in units of inner codes while divided into two fields and output from said inner decoder, and arranging units of inner codes of the field of data in units of fields;
- and
- an outer decoder for re-correcting errors in the data reproduced from the recording medium and output from said frame de-interleaving means to which an error flag is added.
An error correction method for use in a digital signal record/playback apparatus for recording compressed data on a recording medium and reproducing the recorded data from said recording medium, said method comprising the steps of:
- (a) encoding data by adding horizontal parity data to compressed block data;
- (b) interleaving a frame by alternately arranging two fields of data by inner codes from one frame of data which is encoded in said encoding step;
- (c) adding vertical parity data to data from step (b) to transmit the data to a recording medium;
- (d) correcting selected errors in data reproduced from a recording medium, and adding an error flag to data which is not corrected;
- (e) arranging data read from the recording medium in units of fields;
- and
- (f) correcting the errors in the data arranged in units of fields which contain error flags.
Dependencies are inferred from the claim text.