TY - GEN
T1 - From mixtures of mixtures to adaptive transform coding
AU - Archer, Cynthia
AU - Leen, Todd K.
PY - 2001
Y1 - 2001
N2 - We establish a principled framework for adaptive transform coding. Transform coders are often constructed by concatenating an ad hoc choice of transform with suboptimal bit allocation and quantizer design. Instead, we start from a probabilistic latent variable model in the form of a mixture of constrained Gaussian mixtures. From this model we derive a transform coding algorithm, which is a constrained version of the generalized Lloyd algorithm for vector quat design. A byproduct o our derivatn is the introduction of a new transform basis, which unlike other transforms (PCA DCT, etc.) is explicitly optimized for coding. Image compression experiments show adaptive transform coders designed with our algorithm improve compressed image signal-to-noise ratio up to 3 dB compared to global transform codi and 0.5 to 2 dB compared to other adaptive trm coderes.
AB - We establish a principled framework for adaptive transform coding. Transform coders are often constructed by concatenating an ad hoc choice of transform with suboptimal bit allocation and quantizer design. Instead, we start from a probabilistic latent variable model in the form of a mixture of constrained Gaussian mixtures. From this model we derive a transform coding algorithm, which is a constrained version of the generalized Lloyd algorithm for vector quat design. A byproduct o our derivatn is the introduction of a new transform basis, which unlike other transforms (PCA DCT, etc.) is explicitly optimized for coding. Image compression experiments show adaptive transform coders designed with our algorithm improve compressed image signal-to-noise ratio up to 3 dB compared to global transform codi and 0.5 to 2 dB compared to other adaptive trm coderes.
UR - http://www.scopus.com/inward/record.url?scp=0004921502&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:0004921502
SN - 0262122413
SN - 9780262122412
T3 - Advances in Neural Information Processing Systems
BT - Advances in Neural Information Processing Systems 13 - Proceedings of the 2000 Conference, NIPS 2000
PB - Neural information processing systems foundation
T2 - 14th Annual Neural Information Processing Systems Conference, NIPS 2000
Y2 - 27 November 2000 through 2 December 2000
ER -