RFC 3625 (rfc3625) - Page 1 of 15

The QCP File Format and Media Types for Speech Data

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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
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