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ICIP
1997
IEEE

Bit Allocation Methods for Closed-Loop Coding of Oversampled Pyramid Decompositions

12 years 1 months ago
Bit Allocation Methods for Closed-Loop Coding of Oversampled Pyramid Decompositions
Oversampled pyramid decompositions have been successfully applied to scalable video coding. Quantization noise feedback at the encoder closed-loop coding" has several advantages compared to open-loop coding" where noise feedback is not included. Finding optimal bit allocations for closed-loop coders is a complex task since the rate-distortion R,D performance of one quantizer depends on the selected operational points of all previous ones. We present simpli ed models for closed-loop and open-loop coding. From those, analytical solutions to the optimal bit allocation problem can be derived. In the optimal case, closed-loop outperforms open-loop coding although distortion in lower resolution layers of the closed-loop coder may become rather high which is undesirable in scalable coding applications. In this case it turns out to be a good solution to use an optimal open-loop bit allocation for closed-loop coding. Theoretical results are veri ed by coding experiments.
Uwe Horn, Thomas Wiegand, Bernd Girod
Added 26 Oct 2009
Updated 26 Oct 2009
Type Conference
Year 1997
Where ICIP
Authors Uwe Horn, Thomas Wiegand, Bernd Girod
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