System for writing and reading digital data interspersed with an

Details System for writing and reading digital data interspersed with an System for writing and reading digital data interspersed with an

1984-06-18

1987-05-05

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 27, 360 44, 360 49, 360 143, 379 73, G11B 2738, G11B 1518, G11B 2719

Patent

active

046636781

ABSTRACT:
A recording system is provided in which digital time code information is recorded interspersed on the same data track as analog audio message signals. The time codes have a unique format which enables their bit rate to be extracted while reading the code, thus enabling use of the system with tape transports having unregulated fast wind speeds. The system is placed in a fast wind mode of operation and time codes are read and compared to a preselected time code in order to locate a desired audio message for playback. The configuration of the system ensures that the playback of each message will commence only at the beginning of a message. In addition, the invention eliminates the need for a separate data track for time codes, thus increasing the signal to noise ratio of the system.

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patent: 4384308 (1983-05-01), Yanagida
patent: 4422111 (1983-12-01), Moeller et al.
patent: 4473851 (1984-09-01), Nagura et al.
Electronics, 11/21/58, "Tones Find Data in High-Speed Tape Systems" Wasserman et al., pp. 93-95.
EDN, 5/5/78, "Standard 3M Recording Techniques Could Spur Low-Cost .mu.C Use" Kramer pp. 75-81.

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