Patent ID: 6396958
Filing Date: 2002-05-28
Classification: H04N

Abstract:
An image transmission system comprising:blocking circuitry for processing an image to create a plurality of image blocks; transform coding circuitry for processing the image blocks to produce a plurality of transform coefficients; quantizing circuitry for quantizing transform coefficients; low entropy coding circuitry for entropy coding the quantized transform coefficients; error correction coding circuitry for error correction coding the low entropy coded quantized transform coefficients; block truncation circuitry for truncating the low entropy coded quantized transform coefficients to introduce intentional errors into the image, which image is transmitted through a communication channel; block expansion circuitry for expanding blocks of the received image to produce low entropy coded coefficients; error correction decoding circuitry for decoding the low entropy coded quantized transform coefficients; low entropy decoding circuitry for decoding the low entropy coded quantized transform coefficients to produce the quantized transform coefficients; inverse quantizing circuitry for inverge quantizing the quantized transform coefficients to produce a plurality of transform coefficients; inverse transforming circuitry for processing the plurality of transform coefficients to produce the plurality of image blocks; and unblocking circuitry for processing the plurality of image blocks to produce the transmitted image.