Specifications of Analysis
Specifications of Analysis
| LPC analysis | analysis window | Hamming |
| frame length | 30 ms | |
| frame shift | 10 ms | |
| analysis method | autocorrelation method | |
| pitch analysis | pitch range | 80 ~ 500 Hz |
| detection function | normalized autocorrelation function | |
| post processing | a kind of smoothing, handling pitch doubling | |
| input speech | sampling rate | 8000 Hz |
| quantization | 16 bits |
Bit Allocations for Parameter Quantization
| parameter | quantization method | bits | updating rate | |
| event
vector |
LSF's |
|
(2,2,2,3,3,
3,3,2,3,2) |
about
18 Hz |
| V/UV | SQ | 1 | ||
| event
function |
position | SQ | 5 | |
| length | SQ | 3 | ||
| shape | VQ | 5 | ||
| pitch | SQ | 5 or 3 | 25 Hz | |
| energy | SQ | 3 | 25 Hz | |
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