Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-04-08
1989-09-05
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358326, H04N 989
Patent
active
048643874
ABSTRACT:
A time base corrector converts an analog input PAL image signal including a certain time base error to digital form and then stores it in a memory by using a write clock signal derived from the input PAL image signal including the time base error. The stored signal is read out from the memory by a reference readout clock signal to eliminate the time base error, and a reference color burst signal is added to it. The time base corrector extracts a color subcarrier signal from the input PAL image signal, samples the color subcarrier signal by using a first clock signal in a manner such that U-axis data and V-axis data of the color subcarrier signal are generated independently of each other, compares the polarity of the V-axis data of the color burst of the sampled color subcarrier signal with the polarity of the V-axis data of the reference color burst signal, and selectively inverts the polarity of the V-axis data of the color burst of the sampled color subcarrier signal on the basis of the comparison result.
REFERENCES:
patent: 4145705 (1979-03-01), Yoshinaka
patent: 4506286 (1985-03-01), Kashiyi
patent: 4729013 (1988-03-01), Tatami et al.
Eslinger Lewis H.
Maioli Jay H.
Shepperd John W.
Sony Corporation
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