Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1992-12-17
1994-08-16
Oberley, Alvin E.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358335, 358312, 360 101, H04N 595
Patent
active
053391675
ABSTRACT:
A reproduction speed controller for controlling reproduction speed of a video signal having first field image signal and second field image signal including main memory having a storage capacity of two field image signal, sub memory having a storage capacity of at least one field image signal, write unit for writing an input video signal into the main memory and the sub memory in synchronism with a write reference signal which corresponds to a frequency of the input video signal, read unit for selectively read out the written video signal from the main memory and the sub memory in synchronism with a read reference signal having a fixed frequency, passing detection unit for generating a passing detection signal on the basis of the frequency difference between the write reference signal and the read reference signal when the frequency of the write reference signal is lower than the frequency of the read reference signal, and control unit for controlling the write unit and the read unit in response to the passing detection signal, wherein the control unit permits the read unit to successively read out the first field image signal twice and subsequently permits the read unit to successively read out the second field image.
REFERENCES:
patent: 4630132 (1986-12-01), Terada
patent: 4774599 (1988-09-01), Baumeister
patent: 4864428 (1989-09-01), Kanamaru
patent: 4959825 (1990-09-01), Okano
patent: 5285288 (1994-02-01), Takahashi et al.
Chang Vivian W.
Oberley Alvin E.
Pioneer Electronic Corporation
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