Enhancements to RTP Format for EVRC Family Codecs
Qualcomm
Motorola
This document defines several enhancements and extensions to RFC3558 EVRC RTP payload format. In particular, it defines the support for a compact bundled format and EVRC-B codec, as well as discontinuous transmission (DTX) support for EVRC and EVRC-B encoded speech transported via RTP sessions. Some VoIP applications, such as Push- to-Talk and VoIP over low bandwidth dial-up and wireless networks, require such enhancements for efficient use of the bandwidth.