Image transmission apparatus for selectively changing an image d

Details Image transmission apparatus for selectively changing an image d Image transmission apparatus for selectively changing an image d

1992-03-26

1994-07-05

Cole, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color separation

348210, 348242, 358326, 358409, H04N 146, H04N 136, H04N 9455, H04N 907

Patent

active

053272641

ABSTRACT:
An image transmission apparatus comprises a color separating circuit for dividing a video image signal into color signals and a color burst signal, a sampling clock generating circuit for generating a clock signal having a frequency corresponding to a designated pixel number, and a sampling clock synchronizing circuit for converting the clock signal into a sampling clock signal synchronized with the color burst signal. A sampling frequency of a sampling unit (an A/D converter), which samples the color signals in accordance with the sampling clock signal to thereby produce sampled image data, is controlled in accordance with the sampling clock signal. The sampled image data are stored in a frame memory. The sampled image data stored in the frame memory are transmitted from an image data transmitting section composed of a static image compressing/expanding circuit and a transmitting/receiving section. With the image transmission apparatus constructed as described above, a pixel number of image data can be changed to an arbitrary value, so that a proper original image can be reproduced on the receiving side where the transmitted image data are received.

REFERENCES:
patent: 4333103 (1982-06-01), Koiwa et al.
patent: 4558349 (1985-12-01), Sasaki
patent: 5166779 (1992-11-01), Moyer
Honda, et al, "Still Video Transceiver over The General Telephone Networks," IEE Trans. Commun., vol. 88, No. 197, IE 88-58, pp. 27-34, Sep. 1988.

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