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Apparatus and Method of Searching for Fixed Codebook in Speech Codecs Based on Celp Cross-reference to Related Application
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kim, Hyun Woo |
| Copyright Year | 2017 |
| Abstract | Provided are an apparatus and method of searching for a fixed codebook, the apparatus and method selecting an initial fixed codebook appropriate for a speech feature using a pulse replacement method, and determining a pulse replacement number, a threshold value, etc., to thereby improve Sound quality and reduce an amount of unnecessary calculation. The apparatus includes: a speech feature infor mation collector for collecting speech information from a user speech using a CELP (code excited linear prediction) speech codec; a speech feature determiner for determining a speech feature on the basis of the collected speech informa tion; an initial fixed codebook determiner for selecting an initial fixed codebook on the basis of the determined speech feature; a fixed codebook search parameter determiner for determining parameters required for a pulse replacement method on the basis of the determined speech feature; and a fixed codebook determiner for determining a fixed codebook by the pulse replacement method using the selected fixed codebook search parameters and initial fixed codebook as initial values. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://patentimages.storage.googleapis.com/0f/84/1b/4079945bafd13b/US20070136054A1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Patent |
