Apparatus and Method for Highband Coding of Splitband Wideband Speech Coder

摘要

1. The art that the invention defined in the claims ; The present invention will on the high-band speech encoding apparatus and a method of wideband speech coder. ; 2. SUMMARY OF THE INVENTION The attempt to resolve ; The present invention is encoded by a band speech and audio coding information using low bandwidth and TNS (Temporal Noise Shaping) techniques, and landscape that occur in-band speech coding process - to reduce the echo overt, the purpose is that to provide a high-band speech encoding apparatus and method in a wideband speech coder. ; 3. Solution subject matter of the invention ; The present invention, as a high-band speech encoding apparatus for encoding a high-band speech signal using the low-band encoding information from wideband speech encoder, the frequency of the inputted high-band speech signal domain conversion means for converting the area; Linear prediction order determination means for determining a linear prediction order by using the pitch information of the low-band speech signal as the low-band encoding information; Analyzing the converted high-band speech signal into the frequency domain determined according to the linear prediction order linear prediction analysis means for generating a linear prediction coefficient; A linear predictive coefficient quantization means for quantizing said linear prediction coefficient by using the low-band combined signal as the low-band encoding information; And a quantized linear prediction coefficient to inverse quantization to obtain a residual signal, the residual signal quantizing means for quantizing the residual signal comprises. ; 4. An important use of the invention ; The present invention used to fight and audio encoding.