| 摘要 |
PURPOSE:To obtain a high-quality voice encoding system by extracting local components from voice source parameters after quantizing the average characteristic of the parameters by performing vector quantization and individually correcting the local components. CONSTITUTION:Voice source parameters corresponding to the predicting residue of input voice signals are found from the linear prediction parameters and pitch prediction parameters of the input voice signals divided into frames of fixed intervals by means of a voice parameter extracting section 4 and the found parameters are quantized to vectors by means of a vector quantizing section 5. The section 5 retrieves standard patterns previously stored in a code book 6 and a selected standard pattern is sent to a scalar quantizing section 7. Then parameters of a prefixed number are extracted from the voice source parameters of the selected standard pattern while the input voice signals, linear prediction parameters, and pitch prediction parameters are observed and correction is performed on the extracted parameters. Therefore, high-quality reproduced voice signals can be obtained. |
