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My ICIP 2006 Schedule
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Paper Detail
| Paper: | MP-P2.3 |
| Session: | Error Resilience |
| Time: | Monday, October 9, 14:20 - 17:00 |
| Presentation: |
Poster |
| Topic: |
Image & Video Communications: Source/channel coding |
| Title: |
LOW RATE UNIFORM SCALAR QUANTIZATION OF MEMORYLESS GAUSSIAN SOURCES |
| Authors: |
Vadim Sheinin; IBM T. J. Watson Research Center | | | | | Ashish Jagmohan; IBM T. J. Watson Research Center | | |
| Abstract: |
The low-rate (< 1 bits per sample) operational rate-distortion performance of uniform scalar quantizers for the memoryless Gaussian source is studied. Approximate analytical expressions for the operational rate-distortion function are derived, and the accuracy of the derived function is verified through simulation. It is shown that in the zero-rate limit the derived operational rate-distortion function is first-order optimal with respect to the Shannon lower bound. The derived function is used to study the performance of uniform scalar quantizers for the Gaussian Wyner-Ziv problem. Lastly, the derived low-rate rate-distortion function is used to provide improved low-rate bit allocation for jointly Gaussian vectors. |
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