Description  Claims  Drawing  Cited references 

EP1577881A2   [0008] 
US5414796A   [0066] 
US20020123887A   [0074] 

Digital Processing of Speech Signals   [0066] 
Enhanced Variable Rate Codec, Speech Service Options 3, 68, and 70 for Wideband Spread Spectrum Digital Systems   [0154] 
ETSI TS 126 092 V6.0.0   [0154] 
ETSI TS 126 192 V6.0.0   [0154]