Video format signal processing system

Details Video format signal processing system Video format signal processing system

1988-03-10

1989-08-01

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358149, H04N 504

Patent

active

048537810

ABSTRACT:
A video processing system in which data obtained from sampling an input video format signal according to a first timing signal is written into a first memory according to the first timing signal. Data is read-out of the first memory according to a second timing signal having a frequency equal to N times that of a horizontal synchronizing frequency of the input signal, thereby obtaining data with no time-base fluctuation. M-samples of data from the first memory is then written into a second memory, and data from the second memory is read-out such that the read-out signal from the second memory has a different phase than that of the input video format signal. The system is operable for simultaneously stopping data being read-out of the first memory and data being written into the second memory for a period of time equal to R+kM samples of the input video format signal, wherein R is an integer remainder of N/M, and k is either a positive integer or zero.

REFERENCES:
patent: 4109276 (1978-08-01), Hopkins, Jr. et al.
patent: 4439786 (1984-03-01), Claydon et al.
patent: 4468698 (1984-08-01), Kavoussi et al.

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