| 摘要 |
<p>The invention concerns a method which consists in: gathering (17) the parameters on N consecutive frames to form a super-frame; carrying out a vector quantization (18) of the voicing transition frequencies during each super-frame, by transmitting without degradation only the most frequent configurations and by replacing the least frequent configurations by the closest configuration in terms of absolute error among the most frequent; encoding the pitch (19), by scalar quantization of only one pitch value for each super-frame; encoding the energy (20) by selecting only a reduced number of values by gathering said values into sub-packets quantized by vector quantization (21); encoding by vector quantization (21) the spectral envelope parameters by selecting only a predetermined number of filters, the non-transmitted parameters being reconstructed by interpolation or extrapolation from the transmitted filter parameters. The invention is applicable to vocoders.</p> |
