Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1986-06-20
1988-10-25
Adams, Russell E.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358326, 360 361, H04N 595
Patent
active
047807709
ABSTRACT:
Velocity errors in a video signal are sampled at scan line rate and are averaged over a selected plurality of frames to enhance the repetitive velocity errors while cancelling the random velocity errors. The resulting separated repetitive velocity errors then are subtracted from the initial combined velocity errors to provide separated random velocity errors. A repetitive error interlace technique is used to generate an improved repetitive error frequency control signal, while a second order correction technique provides a corresponding random error frequency control signal. The two frequency control signals are combined and the combined signal is used to provide compensation for the initial velocity errors.
REFERENCES:
patent: 4321619 (1982-03-01), Kamaty
patent: 4393413 (1983-07-01), Kaneko
patent: 4709276 (1987-11-01), Yoshinaka
Ampex Corp. Service Manual, Zeus 1, Advanced Video Processor, Sections 10 and 11, catalog #1809690, Oct. 85.
"A New Technique for Time-Base Stabilization of Video Recorders," Coleman, IEEE Trans. on Broadcasting, vol. 17, No. 1, pp. 24-36.
Adams Russell E.
Almeida George B.
Ampex Corporation
Lange Richard P.
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