4GV
Encyclopedia
Qualcomm’s Fourth Generation Vocoder (4G) is a suite of voice speech codecs used by CDMA networks that allows the network operators to dynamically prioritize voice quality to increase network capacity while maintaining voice quality. Currently, the 4GV suite offers EVRC-B
and EVRC-WB.
EVRC-B
Enhanced Variable Rate Codec B is a speech codec used by CDMA networks. EVRC-B is an enhancement to EVRC and compresses each 20 milliseconds of 8000 Hz, 16-bit sampled speechinput into output frames of one of the four different sizes:...
and EVRC-WB.