Reproducing apparatus, error correcting unit and error correcting method
AssigneeSony Corporation
InventorsMinoru Kawahara, Kenji Yamazaki
Life of this patent
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Abstract
A first error corrector performs error detection and error correction using inner codes on data subjected to an error correction coding processing with multiplication codes and a second error corrector performs error detection and error correction using outer codes on the data. A condition discriminator discriminates whether or not the data satisfies predetermined conditions, and a controller responds to the discriminator to prevent error detection and error correction using outer codes. Consequently, power for error detection and error correction is consumed only when sufficiently reliable data can be obtained by error detection and error correction using inner codes.
Claims12
A reproducing apparatus comprising:
- first error correction processing means for performing an error detection and error correction processing using inner codes on coded data, which is subjected to an error correction coding processing with multiplication codes and read out from a predetermined record medium;
- second error correction processing means for performing an error detection and error correction processing using outer codes on said coded data;
- condition discriminating means for discriminating whether or not said coded data satisfy predetermined conditions;
- control means for forbidding the error detection and error correction processing by said second error correction processing means in accordance with said discrimination result;
- decoding means for performing a decoding processing on said coded data subjected to the error detection and error correction by said first error correction processing means and/or said second error correction processing means;
- and
- reproduction outputting means for outputting data subjected to said decoding processing.
An error correcting unit comprising:
- first error correction processing means for performing an error detection and error correction processing using inner codes on data subjected to an error correction coding processing with multiplication codes;
- second error correction processing means for performing an error detection and error correction processing using outer codes on said data;
- condition discriminating means for discriminating whether or not said data satisfy predetermined conditions;
- and
- control means for forbidding the error detection and error correction processing by said second error correction processing means in accordance with said discrimination result.
An error correcting method comprising:
- a condition discriminating step for discriminating whether or not data subjected to an error correction coding processing with multiplication codes satisfy predetermined conditions;
- and
- a correction processing control step for performing an error detection and error correction processing only according to inner codes on said data if said predetermined conditions are satisfied or otherwise for performing an error detection and error correction processing according to outer codes on said data after performing said error detection and error correction processing according to inner codes if said predetermined conditions are not satisfied.
Dependencies are inferred from the claim text.