dbo:abstract
|
- RASTA-filtering and Mean Subtraction was introduced to support (PLP) preprocessing. It uses bandpass filtering in the . Rasta filtering then removes slow channel variations. It has also been applied to cepstrum feature-based preprocessing with both log spectral and cepstral domain filtering. In general a RASTA filter is defined by The numerator is a with N being the order (must be odd) and the denominator is an integrator with time decay. The pole controls the lower limit of frequency and is normally around 0.9. RASTA-filtering can be changed to use mean subtraction, implementing a moving average filter. Filtering is normally performed in the cepstral domain. The mean becomes the long term cepstrum and is typically computed on the speech part for each separate utterance. A silence is necessary to detect each utterance. (en)
|
dbo:wikiPageExternalLink
| |
dbo:wikiPageID
| |
dbo:wikiPageLength
|
- 1111 (xsd:nonNegativeInteger)
|
dbo:wikiPageRevisionID
| |
dbo:wikiPageWikiLink
| |
dcterms:subject
| |
rdfs:comment
|
- RASTA-filtering and Mean Subtraction was introduced to support (PLP) preprocessing. It uses bandpass filtering in the . Rasta filtering then removes slow channel variations. It has also been applied to cepstrum feature-based preprocessing with both log spectral and cepstral domain filtering. In general a RASTA filter is defined by (en)
|
rdfs:label
| |
owl:sameAs
| |
prov:wasDerivedFrom
| |
foaf:isPrimaryTopicOf
| |
is dbo:wikiPageWikiLink
of | |
is foaf:primaryTopic
of | |