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Image coding using robust quantization for noisy digital transmission

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2 Author(s)
Qing Chen ; 3Com (US Robotics), Skokie, IL, USA ; Fischer, T.R.

A robust quantizer is developed for encoding memoryless sources and transmission over the binary symmetric channel (BSC). The system combines channel optimized scalar quantization (COSQ) with all-pass filtering, the latter performed using a binary phase-scrambling/descrambling method. Applied to a broad class of sources, the robust quantizer achieves the same performance as the Gaussian COSQ for the memoryless Gaussian source. This quantizer is used in image coding for transmission over a BSC. The peak signal-to-noise ratio (PSNR) performance degrades gracefully as the channel bit error rate increases

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Image Processing, IEEE Transactions on  (Volume:7 ,  Issue: 4 )