Title :
LSF split vector quantization for wideband codecs with narrowband tandemming
Author :
Gibbs, J.A. ; Hoskin, J.M.
Author_Institution :
Human Interface Labs., Motorola UK Res. Lab., Basingstoke, UK
Abstract :
We present the results of a series of experiments to identify the optimum bit allocation for split LSF VQ for both wideband and narrowband mixed speech. This situation arises for both the GSM AMR wideband and the ITU-T wideband standardisation efforts where tandemming with narrowband codecs will occur. We have chosen to study 40 bit 18th-order LSF VQ calculated on 20 ms frames with different degrees of moving average (MA) prediction in order to exploit the interframe correlation gains available whilst minimising error propagation
Keywords :
cellular radio; code standards; linear predictive coding; optimisation; spectral analysis; speech codecs; speech coding; standardisation; telecommunication standards; 30 ms; 40 bit; GSM AMR wideband standardisation; ITU-T wideband standardisation; LPC; LSF split vector quantization; MA prediction; error propagation minimisation; experiments; interframe correlation gains; linear prediction parameters; moving average prediction; narrowband codecs; narrowband speech compression; narrowband tandemming; optimum bit allocation; split LSF VQ; wideband codecs; wideband-narrowband mixed speech; Bit rate; Databases; Equations; Filters; Frequency; GSM; Narrowband; Speech codecs; Vector quantization; Wideband;
Conference_Titel :
Speech Coding, 2000. Proceedings. 2000 IEEE Workshop on
Conference_Location :
Delavan, WI
Print_ISBN :
0-7803-6416-3
DOI :
10.1109/SCFT.2000.878420
