Read only digital audio information recording medium and digital

Details Read only digital audio information recording medium and digital Read only digital audio information recording medium and digital

1994-07-07

1995-03-28

Young, W. R.

Dynamic information storage or retrieval

Duplication or copying

360 15, G11B 728

Patent

active

054024064

ABSTRACT:
A read only disc according to the present invention has a spiral recording track formed on the surface thereof. The recording track includes a plurality of record unit blocks formed continuously by an optical recording method, wherein each record unit block includes a dubbing permitted area and a dubbing inhibited area. Digital audio information having compressed data is recorded in the dubbing permitted area. On the other hand, display data associated with the digital audio information is recorded in the dubbing inhibited area. Thus, digital dubbing of digital audio information can be carried out and dubbing of display data is prevented to ensure dominance of the read only disc as a master software.

REFERENCES:
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patent: 5097349 (1992-03-01), Nomura et al.
patent: 5146369 (1992-09-01), Yamaguchi
patent: 5177619 (1993-01-01), Sato
"Compact disc digital audio system", Commission Electrotechnique Internationale/International Electrotechnical Commission, Publication 908:1987 (IEC 1987), pp. 1-61; and amendment 1 (1992), pp. 1-20.
Ken C. Pohlmann, "The Compact Disc Formats: Technology and Applications", Journal of the Audio Engineering Society, vol. 36, No. 4, Apr. 1988, New York, pp. 250-282.
Murata et al., "Multimedia Type Digital Audio Disc System", IEEE Transactions on Consumer Electronics, vol. 35, No. 3, pp. 544-551, Aug. 1989.
Torazawa et al., "Erasable Digital Audio Disk System", Applied Optics, vol. 25, No. 22, pp. 3990-3995, Nov. 15, 1986.

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