Image transmission system with preview mode

Details Image transmission system with preview mode Image transmission system with preview mode

1987-06-02

1988-09-27

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358133, 358138, H04N 7137

Patent

active

047745622

ABSTRACT:
A still image communication system performs a block cosine transformation on an image of bandwidth compression. A transmitter subsamples a full resolution image, to provide a preview image, and transforms and transmits the preview image prior to transforming and transmitting the full resolution image. A receiver and displays the preview image, and replaces the preview image on the display block-by-block as the full resolution is received.

REFERENCES:
patent: 4222076 (1980-09-01), Knowlton
patent: 4261018 (1981-04-01), Knowlton
patent: 4302775 (1981-11-01), Widergren et al.
patent: 4414580 (1983-11-01), Johnsen et al.
patent: 4672444 (1987-06-01), Bergen
"Image Display Techniques Using the Cosine Transform", by K. N. Ngan, IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-32, No. 1, Feb. 1984.

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