RFC 3625 (rfc3625) - Page 1 of 15
The QCP File Format and Media Types for Speech Data
Alternative Format: Original Text Document
Network Working Group R. Gellens
Request for Comments: 3625 H. Garudadri
Updates: 3555 Qualcomm
Category: Informational September 2003
The QCP File Format and Media Types for Speech Data
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
RFC 2658 specifies the streaming format for 3GPP2 13K vocoder (High
Rate Speech Service Option 17 for Wideband Spread Spectrum
Communications Systems, also known as QCELP 13K vocoder) data, but
does not specify a storage format. Many implementations have been
using the "QCP" file format (named for its file extension) for
exchanging QCELP 13K data as well as Enhanced Variable Rate Coder
(EVRC) and Selectable Mode Vocoders (SMV) data. (For example,
Eudora(r), QuickTime(r), and cmda2000(r) handsets).
This document specifies the QCP file format and updates the
audio/qcelp media registration to specify this format for storage,
and registers the audio/evrc-qcp and audio/smv-qcp media types for
EVRC and SMV (respectively) data stored in this format.
Gellens & Garudadri Informational