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Toll Quality Voice - 32 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) MIME Sub-type Registration (RFC3802)

IP.com Disclosure Number: IPCOM000029310D
Original Publication Date: 2004-Jun-01
Included in the Prior Art Database: 2004-Jun-23
Document File: 8 page(s) / 12K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Vaudreuil: AUTHOR [+2]

Abstract

This document describes the registration of the MIME sub-type audio/32KADPCM Adaptive Differential Pulse Code Modulation for toll quality audio. This audio encoding is defined by the ITU-T in Recommendation G.726.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 23% of the total text.

Network Working Group                                       G. Vaudreuil

Request for Comments: 3802                           Lucent Technologies

Obsoletes: 2422                                               G. Parsons

Category: Standards Track                                Nortel Networks

                                                               June 2004

    Toll Quality Voice - 32 kbit/s Adaptive Differential Pulse Code

             Modulation (ADPCM) MIME Sub-type Registration

Status of this Memo

   This document specifies an Internet standards track protocol for the

   Internet community, and requests discussion and suggestions for

   improvements.  Please refer to the current edition of the "Internet

   Official Protocol Standards" (STD 1) for the standardization state

   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

Abstract

   This document describes the registration of the MIME sub-type

   audio/32KADPCM Adaptive Differential Pulse Code Modulation for toll

   quality audio.  This audio encoding is defined by the ITU-T in

   Recommendation G.726.

1.  Introduction

   This document describes the registration of the MIME sub-type

   audio/32KADPCM for toll quality audio.  This audio encoding is

   defined by the ITU-T in Recommendation G.726.  This document

   obsoletes an earlier sub-type registration contained in RFC 1911.

   This document also obsoletes RFC 2422.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",

   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this

   document are to be interpreted as described in [REQ].

Vaudreuil, et al.           Standards Track                     [Page 1]

RFC 3802                    32 kbit/s ADPCM                    June 2004

2.  ITU-T Definition

   Recommendation G.726 [G726] defines the characteristics that are

   recommended for the conversion of a 64 kbit/s A-law or m-law pulse

   code modulation (PCM) channel at 8000 samples/second to and from a

   40, 32, 24 or 16 kbit/s channel.  The conversion is applied to the

   PCM bit stream using an adaptive differential pulse code modulation

   (ADPCM) transcoding technique.  This Recommendation obsoletes G.721

   which only defined the 32 kbit/s characteristics.

   Recommendation G.726 was prepared by Study Group 15 of the

   Telecommunications Standardization Sector of the International

   Telecommunication Union (ITU-T) and was approved under the ITU's

   Resolution No. 2 procedure on the 14 of December 1990.

3.  MIME Definition

3.1.  audio/32KADPCM

   CCITT Recomm...