TY - GEN
T1 - Entropy coded successively refinable uniform threshold quantizers
AU - Brunk, Hugh
AU - Jafarkhani, Hamid
AU - Farvardin, Nariman
PY - 1997
Y1 - 1997
N2 - We examine the performance of entropy coded successively refinable uniform threshold quantizers, which have been utilized in numerous proposed progressive image coders. We view a successively refinable quantizer with N stages of refinement as consisting of a sequence of partitions {Pn}, and a sequence of codebooks {Cn}, 1 ≤ n ≤ N. We denote the nth reconstruction of an input sample x as xn; it can be obtained using the nth partition and nth codebook and a simple quantization rule. We consider the design of entropy-coded successively refinable scalar quantizers in which the finest (highest rate) partition and corresponding codebook comprise a uniform threshold quantizer (UTQ). All codebooks are designed optimally for the corresponding partitions and it is well known that entropy coded UTQs perform within 0.255 bits/sample of the rate distortion bound for a variety of source distributions.
AB - We examine the performance of entropy coded successively refinable uniform threshold quantizers, which have been utilized in numerous proposed progressive image coders. We view a successively refinable quantizer with N stages of refinement as consisting of a sequence of partitions {Pn}, and a sequence of codebooks {Cn}, 1 ≤ n ≤ N. We denote the nth reconstruction of an input sample x as xn; it can be obtained using the nth partition and nth codebook and a simple quantization rule. We consider the design of entropy-coded successively refinable scalar quantizers in which the finest (highest rate) partition and corresponding codebook comprise a uniform threshold quantizer (UTQ). All codebooks are designed optimally for the corresponding partitions and it is well known that entropy coded UTQs perform within 0.255 bits/sample of the rate distortion bound for a variety of source distributions.
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U2 - 10.1109/ISIT.1997.612973
DO - 10.1109/ISIT.1997.612973
M3 - Conference contribution
AN - SCOPUS:0030658593
SN - 0780339568
SN - 9780780339569
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 58
BT - Proceedings - 1997 IEEE International Symposium on Information Theory, ISIT 1997
T2 - 1997 IEEE International Symposium on Information Theory, ISIT 1997
Y2 - 29 June 1997 through 4 July 1997
ER -