Image coding using robust quantization for noisy digital transmission

  • Authors:
  • Q. Chen;T. R. Fischer

  • Affiliations:
  • 3Com (US Robotics), Skokie, IL;-

  • Venue:
  • IEEE Transactions on Image Processing
  • Year:
  • 1998

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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