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An efficient single-pass adaptive bandwidth compression technique using the discrete cosine transform is described. The coding process involves a simple thresholding and normalization operation on the transform coefficients. Adaptivity is achieved by using a rate buffer for channel rate equalization. The buffer status and input rate are monitored to generate a feedback normalization factor. Excellent results are demonstrated for coding of color images at 0.4 bits/pixel corresponding to real-time color television transmission over a 1.5 Mbit/s channel.
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Wen-Hsiung Chen
National Yang Ming Chiao Tung University
William K. Pratt
University of Southern California
IRE Transactions on Communications Systems
Adobe Systems (United States)
Cim Systems (United States)
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Chen et al. (Thu,) studied this question.
synapsesocial.com/papers/6a1c0ea600ee29383e9d6306 — DOI: https://doi.org/10.1109/tcom.1984.1096066
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