Data recording medium, data recording method and apparatus, data playback method and apparatus, and data determination method
AssigneeSony Corporation
InventorsTatsuya Inokuchi, Yoichiro Sako, Shunsuke Furukawa, Takashi Kihara
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Abstract
A recording medium includes an area in which data encoded with an error correction code is recorded. In the recording medium, data which contains an error uncorrectable with the error correction code, and data which does not contain an error uncorrectable with the error correction code are recorded in predetermined pattern.
Claims41
A recording medium including an area in which data encoded with a first error correction code is recorded,
- wherein erroneous uncorrectable data which contains an uncorrectable error which cannot be corrected with the first error correction code, and erroneous correctable data which does not contain an uncorrectable error which cannot be corrected with the first error correction code are recorded in predetermined pattern in the recording medium.
A recording method comprising the steps of:
- recording data encoded with a first error correction code in a recording area of a recording medium;
- and
- recording erroneous uncorrectable data which contains an uncorrectable error which cannot be corrected with the first error correction code and erroneous correctable data which does not contain an uncorrectable error which cannot be corrected with the first error correction code in predetermined pattern at predetermined position of the recording medium.
A recording apparatus of a recording medium, comprising:
- a recording unit for recording data in the recording medium;
- an error correction coding unit for encoding input data with a first error correction code;
- a modulation unit for modulating the output data of the error correction coding unit to output the modulated data to the recording unit;
- and
- a data generation unit for generating data which can be decoded with both the first error correction code and a second error correction code different from the first error correction code, and for supplying the generated data to the error correction coding unit.
A playback apparatus of a recording medium, comprising:
- a head for reading data recorded in the recording medium;
- a demodulation unit for demodulating the output signal of the head;
- an error correction unit for performing error correction on the output data of the demodulation unit using an error correction code;
- and
- a determination unit for determining the recording medium based on whether or not the result of the error correction performed by the error correction unit is a predetermined result.
A playback method of a recording medium, comprising the steps of:
- reading data recorded in the recording medium;
- demodulating the read data;
- performing error correction on the demodulated data with an error correction code;
- and
- determining the recording medium based on whether or not the result of the error correction is a predetermined result.
A data determination method comprising the steps of:
- performing error correction on transmitted data using an error correction code;
- and
- determining whether or not the transmitted data is original data based on whether or not the result of the error correction is a predetermined result.
Dependencies are inferred from the claim text.