Video replay store for a multi-channel digital video tape record

Details Video replay store for a multi-channel digital video tape record Video replay store for a multi-channel digital video tape record

1986-10-30

1989-02-07

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 101, 358335, H04N 578

Patent

active

048035670

ABSTRACT:
A video replay store for a multi-channel digital video tape recorder, comprises a respective channel store for each channel, each channel store comprising a plurality of field stores which are written in and read from cyclically, a respective field boundary detector for each channel, each field boundary detector supplying a first pulse in response to each field boundary where an odd field changes to an even field, and a second pulse in response to each field boundary where an even field changes to an odd field, in the off-tape data in the respective channel, and a replay store controller for supplying write requests and read requests in a predetermined sequence to all of the channel stores, the replay store controller stepping on to the next state in the predetermined sequence in response to each first first pulse following a second pulse and each first second pulse following a first pulse.

REFERENCES:
patent: 4251830 (1981-02-01), Tatami
patent: 4361849 (1982-11-01), Bolger
patent: 4376290 (1983-03-01), Shirota
patent: 4430675 (1984-02-01), Fujime
patent: 4698698 (1987-10-01), Collins
Patent Abstracts of Japan, vol. 9, No. 266 (E-352), (1989), Oct. 23, 1985.

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