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On the optimality of embedded deadzone scalar-quantizers for wavelet-based L-infinite-constrained image coding

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5 Author(s)
Alecu, A. ; Electron. & Inf. Process. Dept., Vrije Univ. Brussel, Brussels, Belgium ; Munteanu, A. ; Cornelis, J. ; Dewitte, S.
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In wavelet-based L-constrained embedded coding, the bit-stream is truncated at the bit-rate that corresponds to a guaranteed, user-defined distortion bound. The letter analyzes the optimality of embedded deadzone scalar-quantizers for high-rate L-constrained scalable wavelet-based image coding. A rate-distortion model applicable to the family of embedded deadzone scalar-quantizers is derived and experimentally validated. Conclusions are drawn regarding the optimal subband-quantizer instantiations. The optimal quantizers are employed in a coding algorithm that retains the coding performance and the flexibility options of wavelet-based codecs while allowing for a fully embedded L-oriented bit-stream.

Published in:

Signal Processing Letters, IEEE  (Volume:11 ,  Issue: 3 )