Method for transmitting a high-resolution image over a...

Details Method for transmitting a high-resolution image over a... Method for transmitting a high-resolution image over a...

H - Electricity

04

N

350/33

H04N 1/00 (2006.01) G06T 9/00 (2006.01) H04N 1/41 (2006.01)

Patent

CA 1292555

METHOD FOR TRANSMITTING A HIGH-RESOLUTION IMAGE OVER A NARROW-BAND COMMUNICATION CHANNEL Abstract of the Disclosure Information content of a high resolution image is to be sent over a narrow band communication channel (104) from transmitter (100) to a remote receiver (102). At the receiver, the information content is used to create an image on a display. The invention makes the information content available quickly to the viewer. To that purpose, the spatial frequency spectrum of the high resolution image is analyzed at the transmitter into a first, low-pass, remnant subspectrum band and into one or more additional subspectrum bands. The subspectrum of the first band has a nominal high-frequency cutoff below that of the subspectra of the other bands. Starking with the first, remnant band, the subspectra and are transmitted in sequence over the channel. Each band, when received at the receiver, is used to create at the display the image with increasingly higher definition.

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