The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1989
Filed:
Oct. 15, 1987
Thomas D Sharples, Jr, Redwood City, CA (US);
John C Weitz, Belmont, CA (US);
Ichyterra Ganapathy, Palo Alto, CA (US);
Michael Poimboeuf, Redwood City, CA (US);
Hugh Macdonald, Menlo Park, CA (US);
Charles E Garvin, San Francisco, CA (US);
Personics Corporation, Menlo Park, CA (US);
Abstract
Data processing system for high-speed reproduction of musical recordings at a point-of-sale terminal utilizes optical CD music ROM banks of master programs prerecorded by a Dolby ADM (adaptive delta modulated) technique to condense their 'information' content. Condensation permits higher data throughput during high-speed reproduction. In a 'premastering' process to make encoded masters, a special multiplexer board provides interfacing between Dolby ADM digital audio data and a conventional data processing system. The multiplexer board performs computer-like data blocking and also writes a unique sync code directly in the data block. The data processing system also catalogs and edits the blocked digital audio; places encrypted catalog, pricing, and other indicia in the data file representing the music; and sends the data file to convention 16-bit PCM file writer for making the encoded CD music ROMs which contain the ADM data representing the encoded audio program. A high-speed reproduction device, under control of a desk top personal computer, extracts timing and ADM data from the CD music ROM at high speed and controls high-speed tape drives to compile selected recordings on a single cassette tape in a form compatible with Dolby B noise reduction.