Disc recording medium, disc drive apparatus, and reproduction method
First Claim
1. A disc drive apparatus for recording data into or reproducing data from a disc recording medium comprising:
- a data area, which first data is configured to be recorded into and reproduced from by adoption of a rewritable or write-once recording technique, and which second data remains recorded into and reproduced from by adoption of a groove-wobbling technique; and
a reproduction-only area only allowing third data recorded therein by adoption of a groove technique to be reproduced, wherein;
said first data is configured to be recorded by adoption of a first modulation technique, including a first error-correction block structure;
said second data is recorded by adoption of a second modulation technique; and
said third data is recorded by adoption of a third modulation technique, including a second error-correction block structure based on a first correction coding for said first error-correction block structure,said disc drive apparatus including;
head means for radiating a laser beam to a track created as a groove on said disc recording medium and receiving a reflected beam signal;
extraction means for extracting a signal representing a shape of said track from said reflected beam signal;
first data-signal extraction means for extracting a signal representing said first data from said reflected beam signal;
second data demodulation means for demodulating, in a reproduction operation carried out on said data area, said signal representing said shape of said track by said second modulation technique;
first data demodulation means for demodulating said signal representing said first data in a reproduction operation carried out on said data area by said first modulation technique;
third data demodulation means for demodulating, in a reproduction operation carried out on reproduction-only area, said signal representing said shape of said track by said third modulation technique;
error correction means for carrying out error-correction processing based on error-correction codes on a modulation result output by said first data demodulation means and a modulation result output by said third data demodulation means; and
control means for driving said second data demodulation means to carry out demodulation processing in a data operation performed on said data area, requesting said error correction means to carry out error-correction processing based on said first error correction block in said recording or reproduction operation performed on said data area, driving said third data demodulation means to carry out demodulation processing in a reproduction operation performed on said reproduction-only area, requesting said error correction means to carry out error-correction processing based on said second error correction block in said reproduction operation performed on said reproduction-only area.
1 Assignment
0 Petitions
Accused Products
Abstract
First data representing user data and third data use the same error correction codes. The first data has a first error correction block structure and the third data has a second error correction block structure. That is to say, the first data and the third data have their respective error correction block structures proper for them. In particular, the recording density of the third data is made less dense than the recording density of the first data, and the number of correction codes in the first error-correction block is set at a multiple of m whereas the number of correction codes in the second error-correction block is set at n/m times the number of correction codes in the first error-correction block so that a data-piece count in the second error-correction block is also n/m times a data-piece count in the first error-correction block. As a result, it is possible to provide a good technique of recording shipping-time information onto a high-recording-density disc.
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Citations
24 Claims
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1. A disc drive apparatus for recording data into or reproducing data from a disc recording medium comprising:
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a data area, which first data is configured to be recorded into and reproduced from by adoption of a rewritable or write-once recording technique, and which second data remains recorded into and reproduced from by adoption of a groove-wobbling technique; and a reproduction-only area only allowing third data recorded therein by adoption of a groove technique to be reproduced, wherein; said first data is configured to be recorded by adoption of a first modulation technique, including a first error-correction block structure; said second data is recorded by adoption of a second modulation technique; and said third data is recorded by adoption of a third modulation technique, including a second error-correction block structure based on a first correction coding for said first error-correction block structure, said disc drive apparatus including; head means for radiating a laser beam to a track created as a groove on said disc recording medium and receiving a reflected beam signal; extraction means for extracting a signal representing a shape of said track from said reflected beam signal; first data-signal extraction means for extracting a signal representing said first data from said reflected beam signal; second data demodulation means for demodulating, in a reproduction operation carried out on said data area, said signal representing said shape of said track by said second modulation technique; first data demodulation means for demodulating said signal representing said first data in a reproduction operation carried out on said data area by said first modulation technique; third data demodulation means for demodulating, in a reproduction operation carried out on reproduction-only area, said signal representing said shape of said track by said third modulation technique; error correction means for carrying out error-correction processing based on error-correction codes on a modulation result output by said first data demodulation means and a modulation result output by said third data demodulation means; and control means for driving said second data demodulation means to carry out demodulation processing in a data operation performed on said data area, requesting said error correction means to carry out error-correction processing based on said first error correction block in said recording or reproduction operation performed on said data area, driving said third data demodulation means to carry out demodulation processing in a reproduction operation performed on said reproduction-only area, requesting said error correction means to carry out error-correction processing based on said second error correction block in said reproduction operation performed on said reproduction-only area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A reproduction method for reproducing data from a disc recording medium including
a data area, which first data is configured to be recorded into and reproduced from by adoption of a rewritable or write-once recording technique and, which second data remains recorded into and reproduced from by adoption of a groove-wobbling technique; - and
a reproduction-only area only allowing third data recorded by adoption of a groove technique to be reproduced, wherein; said first data is configured to be recorded by adoption of a first modulation technique, including a first error-correction block structure; said second data is recorded by adoption of a second modulation technique; and said third data is recorded by adoption of a third modulation technique and has a second error-correction block structure based on a first correction coding for said first error-correction block structure, for a reproduction operation carried out on said data area, said reproduction method comprising radiating a laser beam to a track created as a groove on said disc recording medium and receiving a reflected beam signal; extracting a signal representing a wobbling shape of said track and a signal representing said first data from said reflected beam signal; demodulating said extracted signal representing said wobbling shape of said track by said second modulation technique and carrying out a decoding process to produce address information; demodulating said extracted signal representing said first data by adoption of a demodulation technique corresponding to said first modulation technique used for modulating said signal representing said first data; and carrying out error-correction processing based on said error-correction coding of said first error correction block to reproduce said first data, whereas for a reproduction operation carried out on said reproduction-only area, said reproduction method further comprising; radiating a laser beam to said track created as said groove and receiving a reflected beam signal; extracting a signal representing a shape of said track from said reflected beam signal; demodulating said extracted signal representing said shape of said track by said third modulation technique; and carrying out error-correction processing based on said error-correction coding of said second error correction block to reproduce said third data. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification