Multi-variate block polar quantization and an application to audio
2004
Online
Elektronische Ressource
In this article we introduce multi-variate block polar quantization (MBPQ). MBPQ minimizes a weighted distortion for a set of complex variables representing one block of a signal under a resolution constraint for the entire block. MBPQ allows for different probability distributions in different dimensions of the set of complex variables. It outperforms an earlier introduced block polar quantizer and unrestricted polar quantization (UPQ) both for Gaussian complex variables and for sinusoids found from audio data. In the case of audio data we found a performance gain of about 2.5 dB over the best performing conventional resolution-constrained polar quantization (UPQ).
QC 20111025
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Multi-variate block polar quantization and an application to audio
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Veröffentlichung: | 2004 |
Medientyp: | Elektronische Ressource |
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