Method and apparatus for identifying recorded information segmen

Details Method and apparatus for identifying recorded information segmen Method and apparatus for identifying recorded information segmen

1984-07-20

1986-12-09

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 43, 360 722, G11B 509, G11B 1518

Patent

active

046283722

ABSTRACT:
Program segments on a magnetic tape are identified by recording patterns of continuous sine wave signal bursts and blank portions in non-recorded spaces between the program segments, the continuous sine waves all having the same low-frequency relative to the audio frequency band and a selected number of continuous sine waves and a corresponding blank portion of the same length each form one level of a binary signal and a second burst of continuous sine waves and a corresponding blank portion of the same length each form the other level of the binary signal. These four elements are arranged to provide an individual address code for each of the program segments on the magnetic tape and are arranged such that they may be read in either direction of tape travel, in order to identify the program segment from either direction, by forming the address code signals as complementary pairs based upon the location of the program segments relative to the ends of the tape.

REFERENCES:
patent: 3597752 (1971-08-01), Eldert et al.
patent: 3633190 (1972-01-01), Morsing
patent: 3732364 (1973-05-01), Terada
patent: 3760388 (1973-09-01), Schmitz et al.

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