RFC - 3625
The QCP File Format and Media Types for Speech Data
| Original: | ftp://ftp.isi.edu/in-notes/rfc3625.txt |
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| Authors: | R. Gellens [Qualcomm], H. Garudadri [Qualcomm] |
| Date: | September 2003 |
| Category: | Informational |
| Updates: | |
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| RFC-3555prop | MIME Type Registration of RTP Payload Formats (Obsoleted by RFC-4856prop, RFC-4855prop) (Updated by RFC-4629prop, RFC-3625) |
| Referred by: | 1 RFC |
| Refers to: | 4 RFC |
Status
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 2658prop 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.
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prepared by Miloslav Nic
- the founder of Zvon.org and Law-Ref.org
- the head of B.Sc. program Informatics and chemistry [in Czech]
- the founder of Lidem.org - Volby 2006 - parliamentary elections in the Czech Republic [in Czech]
- the chief consultant of the publishing house ICT Press
- and Pavel Srb, a student of B.Sc. program Informatics and chemistry