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Channel Normalization Apparatus and Method for Robust Speech Recognition Background of the Invention
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2017 |
| Abstract | A channel normalization apparatus includes: a characteristic extraction unit extracting MFCC characteristics and output ting rows of frames according to time; a characteristic parameter average calculation unit calculating an average value of the rows of the outputted MFCC characteristics; a channel variation estimation unit configuring a codebook based on a database of speech signals with attenuated channel variations and estimating a channel variation for each frame by calculating a distance between a MFCC parameter for each frame and an individual median value of the codebook when a MFCC of a channel distorted speech signal is inputted; and a Smoothing operation based channel normalization unit Smoothing another average value of the channel variation from the characteristic parameter average calculation unit and the channel variation from the channel variation estimation unit, Subtracting the other average value from the MFCC of each frame and outputting rows of channel normalized MFCC characteristics. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://patentimages.storage.googleapis.com/85/cb/b9/183e846d848430/US20060129391A1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
