RFC 3625 (rfc3625) - Page 2 of 15


The QCP File Format and Media Types for Speech Data



Alternative Format: Original Text Document



RFC 3625            QCP File Format and Media Types       September 2003


Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Conventions Used in this Document. . . . . . . . . . . . . . .  2
   3.  QCP File Format. . . . . . . . . . . . . . . . . . . . . . . .  2
   4.  IANA Considerations. . . . . . . . . . . . . . . . . . . . . . 10
       4.1.  Update of Media Type Audio/qcelp . . . . . . . . . . . . 10
       4.2.  Update of Media Type Audio/vnd.qcelp . . . . . . . . . . 10
       4.3.  Registration of Audio/EVRC-QCP . . . . . . . . . . . . . 11
       4.4.  Registration of Audio/SMV-QCP. . . . . . . . . . . . . . 12
   5.  Security Considerations. . . . . . . . . . . . . . . . . . . . 13
   6.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 13
   7.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
       7.1.  Normative References . . . . . . . . . . . . . . . . . . 13
       7.2.  Informative References . . . . . . . . . . . . . . . . . 13
   8.  Intellectual Property Statement. . . . . . . . . . . . . . . . 14
   9.  Editors' Addresses . . . . . . . . . . . . . . . . . . . . . . 14
   10. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 15

1.  Introduction

   This document specifies the QCP format for storage of [QCELP] 13K,
   [EVRC], and [SMV] vocoder frames in files which may reside on network
   elements (e.g., media servers, Multimedia Messaging System (MMS)
   centers, etc.) and third-generation cellular (3G) handsets, or be
   transmitted via email or other mechanisms.

   Vocoder frames read from a QCP file may be streamed using protocols
   and formats outside the scope of this document, delivered to an
   [EVRC], [SMV], or [QCELP] 13K decoder, or otherwise processed.

   The QCP format supports [QCELP] 13K as well as [EVRC] and [SMV] data.
   Note that this format is different from the EVRC and SMV storage
   format specified in [EVRC-SMV].

2.  Conventions Used in this Document

   The key words "REQUIRED", "MUST", "MUST NOT", "SHOULD", "SHOULD NOT",
   and "MAY" in this document are to be interpreted as described in BCP
   14, RFC 2119 [KEYWORDS].

3.  QCP File Format

   The following describes the QCP file format using [ABNF].

   A qcp file contains data frames generated by the [QCELP], [EVRC], or
   [SMV] vocoders.




Gellens & Garudadri          Informational