Recording/playback apparatus and method of communication in same

Details Recording/playback apparatus and method of communication in same Recording/playback apparatus and method of communication in same

1989-02-24

1992-06-09

Envall, Jr., Roy N.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358342, 358906, 360 361, 369 50, H04N 576

Patent

active

051212188

ABSTRACT:
A recording/playback apparatus is provided with a plurality of controllers (inclusive of CPU's) which, by communicating with one another, share control of each of the components of the recording/playback apparatus or of the entire apparatus. Communication among the controllers is performed in the second half of one period of a signal related to the rotational reference phase of a rotating recording medium. This makes it possible for control requiring high precision to be performed in the first half of the aforementional period without being affected by high-priority interrupts which accompany communication control. Further, in order that the aforementioned communication may be carried out in the second half of the above mentioned period, message editing is performed in the first half of the same period. This enables prompt communication processing during the short time in the second half of the period without an unnecessary waste of time.

REFERENCES:
patent: 4545016 (1985-10-01), Berger
patent: 4549262 (1985-10-01), Chung et al.
patent: 4812922 (1989-03-01), Minoura et al.
patent: 4918538 (1990-04-01), Saito et al.

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