System for recording digital information in a pulse-length modul

Details System for recording digital information in a pulse-length modul System for recording digital information in a pulse-length modul

1990-03-16

1991-03-26

Richardson, Robert L.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

358342, 360 331, 360 39, H04N 576, G11B 700

Patent

active

050035266

ABSTRACT:
An improved system for recording and playing back digital information in a special pulse-length modulation format on a disc-shaped record. The digital information is stored in a succession of alternating marks and spaces, both having lengths that are discretely variable in accordance with a succession of multi-bit binary code blocks.

REFERENCES:
patent: 3701846 (1972-10-01), Zenzefilis
patent: 4022986 (1977-05-01), Teer
patent: 4094013 (1978-06-01), Hill
patent: 4161753 (1979-07-01), Bailey et al.
patent: 4210931 (1980-07-01), Bailey et al.
patent: 4222072 (1980-09-01), Bailey et al.
Sony ES Review 1979, vol. 34 (Annex 1).
English translation (Annex 1A).
"A Long Play Digital Audio Disc System" by Dr. Doi, Itoh, Ogawa, Sony Audio Technology Ctr, Tokyo, Japan presented in Brussels, Belgium 1979 (Annex 2).
"Development of PCM Audio Disc System for Long Play of Two and Half Hours on One Side", Showa 53, Oct. 5th, Sony Corporation Press Release (Annex 3 and 3A).
Annex 4: Japanese newspaper-Oct. 6, 1978.
Annex 5: Japanese newspaper-Oct. 6, 1978.
Annex 6: extracted copy of "Stero Technic" of Japanese Magazine, Dec. 1978.
Annex 7: "PCM Audio Disc System" published on "Electronics" of Japanese magazine, p. 1219, Dec. 1978.
Annex 8: DAD-1X, Sony brochure.
Annex 9: extracted copy of Billboard, Nov. 18, 1978.
Annex 10: Sony ES Receiw, vol. 34, 1979.
Annex 11: English translation of Japanese article "PCM Audio Disc (Record) Player", on Television Society, pp. 1-21.

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