Method and apparatus for predictive coding

Details Method and apparatus for predictive coding Method and apparatus for predictive coding

1988-09-15

1990-05-08

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358133, 358135, 358138, 375 27, H04N 712

Patent

active

049242989

ABSTRACT:
An analog color video signal is sampled at a frequency which equals a multiple of a frequency of a chrominance subcarrier. The sampled signal is converted into a corresponding first digital signal. The first digital signal is converted into a second digital signal by changing a data arrangement. The second digital signal is processed into a coded signal through a predictive coding process. During the predictive coding process, first data of the second signal are predicted on the basis of second data of the second signal. The first data correspond to a picture element in a first scanning line. The second data correspond to a picture element in a second scanning line adjacent to the first scanning line. The second data picture element is selected from picture elements in the second scanning line at which phases of the chrominance subcarrier are equal to a phase of the chrominance subcarrier at the first data picture element. The selected picture element is spatially closest to the first data picture element. The predicted first data are used in the predictive coding process.

REFERENCES:
patent: 4369464 (1983-01-01), Temime
patent: 4468708 (1984-08-01), Coleman
patent: 4720743 (1988-01-01), Iinuma
patent: 4782387 (1988-11-01), Sabri
patent: 4802004 (1989-01-01), Matsumoto

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