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US 8,954,819 B2Granted
Method and apparatus for reading a disc
AssigneeMarvell World Trade Ltd.
InventorsMats Oberg, Jin Xie
Life of this patent
Estimating the term…
Abstract
Aspects of the disclosure provide a circuit that includes a decoder, an error checking module, and a controller. The decoder is configured to receive codewords, and decode the codewords based on an error correcting code. The error checking module is configured to error-check sectors using an error detecting code in the sectors. Each sector is formed of a plurality of decoded codewords. The controller is configured to store in a memory, when the error checking fails for at least one sector, the decoded codewords and corresponding flags indicative of pass or fail of the decoding of the codewords.
Claims17
A circuit, comprising:
- a decoder configured to receive first codewords and decode the first codewords based on a first error correcting code, and to receive second codewords and decode the second codewords based on a second error correcting code;
- an error checking module configured to error-check first sectors using a first error detecting code in the first sectors, each first sector being formed of a plurality of decoded first codewords, and to error-check second sectors using a second error detecting code in the second sectors, each second sector being formed of a plurality of decoded second codewords;
- and
- a controller configured to store in a memory, when the error checking fails for at least one first sector, the decoded first codewords and corresponding flags indicative of pass or fail of the decoding of the first codewords and to store in the memory, when the error checking of the second sectors fails for at least one second sector, the decoded second codewords based on the stored flags in the memory to combine the decoded first codewords with the decoded second codewords.
1 more element
A method, comprising:
- receiving first codewords and second codewords;
- decoding the first codewords the second codewords based on an error correcting code;
- error-checking first sectors using a first error detecting code in first sectors, each first sector being formed of a plurality of decoded first codewords;
- error-checking second sectors using second error detecting code in second sectors, each second sector being formed of a plurality of decoded second codewords;
- storing in a memory the decoded codewords and corresponding flags indicative of pass or fail of the decoding of the codewords when the error checking fails for at least one sector;
- and
- combining the decoded second codewords in the memory with the decoded first codewords based on stored flags when the error checking of the second sectors fails for at least one second sector.
4 more elements
An apparatus, comprising:
- an optical pickup unit configured to generate an electrical signal in response to reading a Blu-ray disc;
- a decoder configured to receive first codewords extracted from the electrical signal and decode the first codewords based on a first error correcting code, and to receive second codewords and decode the second codewords based on a second error correcting code;
- an error checking module configured to error-check first sectors using a first error detecting code in the first sectors, each first sector being formed of a plurality of decoded first codewords, and to error-check second sectors using a second error detecting code in the second sectors, each second sector being formed of a plurality of decoded second codewords;
- and
- a controller configured to store in a memory, when the error checking fails for at least one first sector, the decoded first codewords and corresponding flags indicative of pass or fail of the decoding of the first codewords and to combine, when the error checking of the second sectors fails for at least one second sector, the decoded first codewords with the decoded second codewords based on the stored flags in the memory.
2 more elements
Dependencies are inferred from the claim text.