Image processing apparatus and method

Details Image processing apparatus and method Image processing apparatus and method

1992-04-22

1994-04-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3582612, 3582613, 358401, 348384, 348415, H04N 712, H04N 1419, H04N 1415, H04N 100

Patent

active

053010400

ABSTRACT:
An apparatus is provided for quantizing data obtained by transforming image data to a frequency zone so as to encode it. The speed at which such an apparatus performs processing is increased. Data is quantized on the basis of a plurality of coefficients C.sub.1 for controlling a quantizing step. As a result of the quantization, reference encoding data items Nb1 to Nb4 are obtained. Coefficients C.sub.5 to C.sub.7 for controlling the quantizing step are generated when image data which is delayed by one frame is quantized. At this time, the data items Nb1 to Nb 4 are output by bit-shifting the result of the quantization.

REFERENCES:
patent: 3992697 (1976-11-01), Knab et al.
patent: 4371895 (1983-02-01), Koga
patent: 4797945 (1989-01-01), Suzuki et al.
patent: 4887151 (1989-12-01), Wataya
patent: 4903124 (1990-02-01), Hoshi et al.
patent: 4974071 (1990-11-01), Maeda
patent: 5023919 (1991-06-01), Wataya
patent: 5086439 (1992-02-01), Asai et al.
patent: 5089888 (1992-02-01), Zdepski et al.
patent: 5162923 (1992-11-01), Yoshida et al.

Affiliated with

Also associated with

Rating

Image processing apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image processing apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-515995