TY - GEN
T1 - Lookahead in growing tree-structured vector quantizers
AU - Riskin, Eve A.
AU - Gray, Robert M.
PY - 1991
Y1 - 1991
N2 - A technique is presented for directly designing an unbalanced variable rate tree-structured vector quantizer. The algorithm is an extension of an algorithm for decision tree design which grows the tree one node at a time rather than one layer at a time. The node that is split is the one that yields the greatest slope of decrease in distortion to increase in rate. This is performing a lookahead step of depth one. The authors then modify the growing technique to allow for lookahead of depths two and three. It is found that two- and three-step lookahead provide only slight improvement in the signal to noise ratio of the overall tree (on the order of 0.6 dB).
AB - A technique is presented for directly designing an unbalanced variable rate tree-structured vector quantizer. The algorithm is an extension of an algorithm for decision tree design which grows the tree one node at a time rather than one layer at a time. The node that is split is the one that yields the greatest slope of decrease in distortion to increase in rate. This is performing a lookahead step of depth one. The authors then modify the growing technique to allow for lookahead of depths two and three. It is found that two- and three-step lookahead provide only slight improvement in the signal to noise ratio of the overall tree (on the order of 0.6 dB).
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M3 - Conference contribution
AN - SCOPUS:0026401080
SN - 078030033
T3 - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
SP - 2289
EP - 2292
BT - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
A2 - Anon, null
T2 - Proceedings of the 1991 International Conference on Acoustics, Speech, and Signal Processing - ICASSP 91
Y2 - 14 May 1991 through 17 May 1991
ER -