Warped linear predictive coding
From Infogalactic: the planetary knowledge core
Warped linear predictive coding (warped LPC or WLPC) is a variant of linear predictive coding in which the spectral representation of the system is modified, for example by replacing the unit delays used in an LPC implementation with first-order allpass filters. This can have advantages in reducing the bitrate required for a given level of perceived audio quality/intelligibility, especially in wideband audio coding.
History
Warped LPC was first proposed in 1980 by Hans Werner Strube.
References
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Data compression methods
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