Image transmitting system for transmitting dynamic image data

Details Image transmitting system for transmitting dynamic image data Image transmitting system for transmitting dynamic image data

H - Electricity

04

L

H04L 12/20 (2006.01) H04N 7/15 (2006.01) H04N 7/24 (2006.01) H04N 7/26 (2006.01)

Patent

CA 2327871

An image transmitting system which maintains the same image resolution even when a line speed is set to a low speed. The image transmitting system basically comprises an image data conversion block, a quantization block, a variable-length coding block, smoothing buffers, output selectors, and a dequantization block. The image data conversion block converts input image data into a coefficient suitable for coding. The quantization block quantizes the coefficients obtained through conversion. The variable-length coding block codes the quantized coefficients. The first smoothing buffer smoothes the generated amount of data with respect to a first frame in a block, the second smoothing buffer smoothes the generated amount of data with respect to a second frame in the block, and the third smoothing buffer smoothes the generated amount of data with respect to a third frame in the block. The first output selector is used when selecting a line speed of 96 Kbps, and the second output selector is used when selecting a line speed of 128 Kbps. The quantization block reproduces the previous frame for use in an interframe conversion.

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