Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1990-12-28
1992-12-22
Young, Wayne R.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 4429, 369 4436, 369 48, 369 54, 369 58, 369116, 3692752.275.3, G11B 7085
Patent
active
051738864
ABSTRACT:
A composite read-only and rewritable type optical disc, and a disc drive apparatus for reading/writing data into the disc. The optical disc has a plurality of sectors forming a data read-only area and a write/read area. The disc includes a recording film formed over its entire surface by which data can be recorded on the disc. Each area has track sectors each having a sector identifier portion in which address information is recorded and a data field portion to record data. Data-field identification flags indicative of the read-only area and the write/read area are recorded in the respective identifier portions. On reading or writing this optical disc, the data field identification flag is detected to identify the kind of related area, i.e., whether it is a read-only area or a write/read area. Thus, it is possible to avoid erroneous recording of data into the read-only area. Upon executing a reading operation, waveform equalization and binary-clipping level of reproduction signals can be well controlled. The gain of the servo loop can be switched. The track searching operation can be stably performed. The reading and writing of data with respect to the data write/read area can be improved.
REFERENCES:
patent: 4229808 (1980-10-01), Hui
patent: 4269917 (1981-05-01), Drexler et al.
patent: 4296491 (1981-10-01), Jerome
patent: 4301486 (1981-11-01), Brown et al.
patent: 4385372 (1983-05-01), Drexler
patent: 4417330 (1983-11-01), Hazel et al.
patent: 4467383 (1984-08-01), Ohta et al.
patent: 4484319 (1984-11-01), Koishi et al.
patent: 4507763 (1985-03-01), Kato
patent: 4509161 (1985-04-01), Vande Leest et al.
patent: 4523304 (1985-06-01), Satoh et al.
patent: 4527263 (1985-07-01), Nakagawa
patent: 4546462 (1985-10-01), Koishi et al.
patent: 4561082 (1985-12-01), Gerard et al.
patent: 4570251 (1986-02-01), Yokota et al.
patent: 4580255 (1986-04-01), Inoue et al.
patent: 4583208 (1986-04-01), Verboom
patent: 4592036 (1986-05-01), Furuya et al.
patent: 4594701 (1986-06-01), Earman et al.
patent: 4599718 (1986-07-01), Nakagawa et al.
patent: 4607358 (1986-08-01), Maeda et al.
patent: 4611314 (1986-09-01), Ogata et al.
patent: 4611316 (1986-09-01), Takeuchi et al.
patent: 4611317 (1986-09-01), Takeuchi et al.
patent: 4663751 (1987-05-01), Kaku et al.
patent: 4669077 (1987-05-01), Gerard et al.
patent: 4674071 (1987-06-01), Okumura et al.
patent: 4677606 (1987-06-01), Ogata et al.
patent: 4701603 (1987-10-01), Dakin et al.
patent: 4760566 (1988-07-01), Kobayashi et al.
patent: 4774700 (1988-09-01), Satoh et al.
IBM Technical Disclosure, "Video Disk With Updating Feature", Bruce, C. A. et al., vol. 22, No. 3, Aug./1979.
Patent Abstracts of Japan, vol. 10, No. 22 (p.-424)[2079], Jan. 28, 1986.
Patent Abstracts of Japan, vol. 10, No. 152 (p.-462)[2208], Jun. 3, 1986.
Patent Abstracts of Japan, vol. 8, No. 121 (p.-278)[1558], Jun. 7, 1984.
Patent Abstracts of Japan, vol. 6, No. 192 (p.-145)[1070], Sep. 30, 1982.
Patent Abstracts of Japan, vol. 10, No. 123 (p.-469)[2229], Jun. 18, 1986.
F. J. Dallmans, European Search Report, EP87300789, 4 pages, Oct. 6, 1988.
Fukushima Yoshihisa
Ichinose Makoto
Kuroki Yuzuru
Satoh Isao
Takagi Yuji
Matsushita Electric - Industrial Co., Ltd.
Young Wayne R.
LandOfFree
Composite optical disc having both a data read-only area and a d does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composite optical disc having both a data read-only area and a d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite optical disc having both a data read-only area and a d will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-978552