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Dictionary design for matching pursuit and application to motion-compensated video coding

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2 Author(s)

We present a new algorithm for matching pursuit (MP) dictionary design. This technique uses existing vector-quantization design techniques and an inner product-based distortion measure to learn functions from a set of training patterns. While this scheme can be applied to many MP applications, we focus on motion-compensated video coding. Given a set of training sequences, data are extracted from the high-energy packets of the motion-compensated frames. Dictionaries with different regions of support are trained, pruned, and finally evaluated on MPEG test sequences. We find that for high bit-rate QCIF sequences we can achieve improvements of up to 0.66 dB with respect to conventional MP with separable Gabor functions.

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:14 ,  Issue: 6 )

Date of Publication:

June 2004

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