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New bit allocation method for wavelet and octave subband coding

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1 Author(s)
Kai-Kuang Ma ; Inst. of Microelectron., Nat. Univ. of Singapore, Singapore

A new bit allocation algorithm is derived for wavelet and octave subband source coding, subject to the Shannon rate-distortion bound, using a Lagrange multiplier optimization technique. A sequential form is developed from the derived direct form, for effectively reducing unassigned bits due to negative bit allocation and fixed bit-rate quantizers. The proposed sequential form algorithm is generalized and optimized to incorporate any given finite number of fixed bit-rate quantizers and is highly suitable for real-time applications and implementation. The bit allocation performance of the sequential Shannon-bound based algorithm is demonstrated through its application in image coding

Published in:

Circuits and Systems, 1994. APCCAS '94., 1994 IEEE Asia-Pacific Conference on

Date of Conference:

5-8 Dec 1994