title: Image coding using robust quantization for noisy digital transmission.
abstract: 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.
authors.affiliation: 3Com (US Robotics), Skokie, IL, USA.
authors.forename: Q
authors.initials: Q
authors.lastname: Chen
authors.forename: T R
authors.initials: TR
authors.lastname: Fischer