Chroma encoder

Details Chroma encoder Chroma encoder

1992-07-10

1993-09-14

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 23, 358 14, H04N 972

Patent

active

052454150

ABSTRACT:
A chroma encoder inputs an analog color-difference signal and outputs an appropriate chroma signal, and includes an A/D converter for converting the analog color-difference signal into a digital color-difference signal, and a calculator for sampling the pedestal level of the digital color-difference signal a predetermined number of times. The calculator then calculates the difference value between the average value of the sampled values and a predetermined value. A subtracter is provided for subtracting the difference value output from the calculator from the digital color-difference signal to obtain the chroma signal.

REFERENCES:
patent: 4124869 (1978-11-01), Heitmann
patent: 4210933 (1980-07-01), Heitmann
patent: 4766485 (1988-08-01), Takayama et al.
Lever et al. "Analogue Processing and Operation Controls" IBA Tech. Rev (GB), No. 8 Sep. 1976 pp. 16-50.

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