[54] METHOD OF AND APPARATUS FOR
RECORDING AND REPRODUCING DATA
AND TRANSMITTING DATA
[75] Inventors: Yoichiro Sako, Chiba; Satoshi Otsuka; Tamotsu Yamagami, both of Kanagawa, all of Japan
[73] Assignee: Sony Corporation, Tokyo, Japan
[ * ] Notice: This patent issued on a continued prosecution application filed under 37 CFR 1.53(d), and is subject to the twenty year patent term provisions of 35 U.S.C. 154(a)(2).
[21] Appl. No.: 546,507
[22] Filed: Oct. 20, 1995
[30] Foreign Application Priority Data
Oct. 24, 1994 [JP] Japan 6-258522
[51] Int. CI. G06F 11 10
[52] U.S. CI 371/37.4; 371/39.1
[58] Field of Search 371/37.7,37.5,
371/37.4; 369/54, 58; 380/3; 386/109
[56] References Cited
U.S. PATENT DOCUMENTS
4,680,764 7/1987 Suzuki et al 371/40
4,698,810 10/1987 Fukuda et al 371/37.7
4,716,566 12/1987 Masuhara et al 371/37.7
4,719,628 1/1988 Ozaki et al 371/50
4,760,576 7/1988 Sako 371/40
4,781,451 11/1988 Sako et al 371/37.5
4,788,685 11/1988 Sako et al 371/37.5
4,802,169 1/1989 Suzuki et al 371/38
4,881,232 11/1989 Sako et al 371/37.4
4,949,326 8/1990 Takagi et al 369/54
4,958,337 9/1990 Yamanaka et al 369/58
5,257,271 10/1993 Lagadec et al 371/37.4
5,272,692 12/1993 Henderson et al 369/275.1
5,287,468 2/1994 Furahashi et al 395/375
5,325,371 6/1994 Maeda et al 371/37.5
5,408,531 4/1995 Nakajima 380/3
5,438,560 8/1995 Lee 369/58
5,585,933 12/1996 Ichige et al 386/109
FOREIGN PATENT DOCUMENTS
60-201575 10/1985 Japan G11B 20/18
61-46624 3/1986 Japan H03M 13/00
62-161221 7/1987 Japan H03M 13/00
62-236185 10/1987 Japan G11B 20/18
62-248313 10/1987 Japan H03M 13/00
62-283472 12/1987 Japan G11B 27/10
63-20921 1/1988 Japan H03M 13/00
OTHER PUBLICATIONS
E. Fujiwara et al., "Cross-Interleave Reed-Solomon Code," Applications To Computer Systems, (1990), #XP 002048536, pp. 237-245.
Primary Examiner—-Todd Subawn
Assistant Examiner—Fred F. Tzeng
Attorney, Agent, or Firm—Limbach & Limbach LLP
[57] ABSTRACT
First error-processing data are generated with respect to a predetermined amount of data, and second error-processing data are generated with respect to each of a plurality of blocks produced by dividing the predetermined amount of data. Data of record units are generated from the predetermined amount of data, the first error-processing data, and the second error-processing data. The data of record units are recorded on and reproduced from a recording medium. Errors are corrected in the predetermined amount of data in the reproduced data of record units with the first errorprocessing data with respect to each of the record units. If errors cannot be corrected, at least errors are detected in the predetermined amount of data in each of the blocks with the second error-processing data. If errors are detected in N (N is a positive integer) successive blocks, all data in at least one block which is not positioned at an end of the N successive blocks are regarded as being erased, thereby correcting errors in the predetermined amount of data in the record units with the first error-processing data, thus producing reproduced data.
24 Claims, 18 Drawing Sheets
