US 4,811,325 A · High-speed reproduction facility for audio programs

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.

Claims26

Dependent claims

A high-speed recording apparatus for reproducing a customized group of audio programs on a slave medium wherein said programs are derived from encoded representations of master recordings contained on a master storage medium, said system comprising:

A. memory means for storing in said master medium timing information and digitally encoded representations of said master recordings, said memory means further including indicia means associated with respective ones of said master recordings thereby to allow selected replication thereof, said representations being digitally encoded by high-efficiency sampling techniques adapted for high-speed replication,
B. high-speed reproduction means including at least one reproducer for providing greater-than-real-time recording of audio programs on an associated slave medium, and
C. controller means connected with said memory means and said reproduction means, said controller means being responsive to said indicia means and said timing information for selectively accessing and effecting reproduction of said master recordings on said slave medium thereby producing said customized group of selected audio programs.

An apparatus for high-speed reproduction of audio programs on a slave medium in a data processing environment wherein the programs are derived from encoded representations of audio programs stored on a master storage medium, said apparatus producing a customize group of audio programs on said slave medium and comprising:

A. a data processing system for handling digital data and processing instructions for reproduction of audio programs,
B. memory means for storing digitally encoded data signals representing said audio programs, said memory means further including catalog information associated with respective ones of said audio programs thereby to allow selected access thereof and timing information useful for generation clocking signals permitting extractions of data therefrom,
C. decoder means utilizing said timing information for extracting data from said memory means and converting said encoded digital data signals of said memory means to a format compatible with said data processing system,
D. reproduction means including at least one reproducer for recording said audio program on a slave medium, and
E. said data processing system including means for controlling said memory means and said reproduction means in accordance with said catalog information to access selected programs and to reproduce said programs on said slave medium thereby to produce said customize group of audio programs.

2 more elements

Dependencies are inferred from the claim text.

High-speed reproduction facility for audio programs

Life of this patent

High-speed reproduction facility for audio programs

Life of this patent

Abstract

Claims26