Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1987-01-28
1990-08-21
Chin, Tommy P.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 40, H04N 964
Patent
active
049511262
ABSTRACT:
A video signal processing method for a picture-in-picture function comprises the steps of sampling a second composite color television signal corresponding to a subscreen by a signal (3 fsc) having a frequency three times the frequency of a chrominance subcarrier (fsc) signal to write the same in a field memory, reading the sampled signal written in the field memory at the frequency of 3 fsc in the ratio of one to N+1 data in the horizontal direction and at intervals of even horizontal lines in the vertical direction and switching the read compressed second composite color television signal and a first composite color television signal corresponding to a main screen in prescribed timing to display the same on a television screen. Color signals of the first and second composite color television signals may be previously made in phase with each other.
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patent: 4139860 (1979-02-01), Micic
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patent: 4651208 (1987-03-01), Rhodes
patent: 4680630 (1987-07-01), Field
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Fully Digitalized Color Picture in Picture Television System, by Masuda et al., IEEE Transactions on Consumer Electronics, vol. CE-25, Feb. 1979, pp. 152-159.
Digital Video Effects, by Inaba et al., NEC's Field Experience with Switching System, No. 56, Jan. 1980, pp. 130-134.
Television Gijutsu, Japanese Periodical, Dec. 1984, pp. 31-37.
Chin Tommy P.
Sanyo Electric Co,. Ltd.
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