RTP Payload Format for TSVCIS Codec
draft-ietf-payload-tsvcis-00

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Last updated 2018-05-02 (latest revision 2018-04-16)
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Payload Working Group                                  Victor Demjanenko
Internet-Draft                                               John Punaro
Intended Status: Standards Track                         David Satterlee
                                                VOCAL Technologies, Ltd.
Expires: October 18, 2018                                 April 16, 2018

                  RTP Payload Format for TSVCIS Codec 
                      draft-ietf-payload-tsvcis-00

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Abstract

   This document describes the RTP payload format for the Tactical
   Secure Voice Cryptographic Interoperability Specification (TSVCIS)
   speech coder.  TSVCIS is a scalable narrowband voice coder supporting
   varying encoder data rates and fallbacks.  It is implemented as an
   augmentation to the Mixed Excitation Linear Prediction Enhanced
   (MELPe) speech coder by conveying additional speech coder parameters
   for enhancing voice quality.  TSVCIS augmented speech data is
 

Demjanenko, Punaro & SatterleeExpires October 18, 2018          [Page 1]
INTERNET DRAFT    RTP Payload Format for TSVCIS Codec     April 16, 2018

   processed in conjunction with its temporal matched MELP 2400 speech
   data.  The RTP packetization of TSVCIS and MELPe speech coder data is
   described in detail.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
     1.1.  Conventions  . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Background . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Payload Format . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.1.  MELPe Bitstream Definitions  . . . . . . . . . . . . . . .  5
       3.1.1.  2400 bps Bitstream Structure . . . . . . . . . . . . .  6
       3.1.2.  1200 bps Bitstream Structure . . . . . . . . . . . . .  6
       3.1.3.  600 bps Bitstream Structure  . . . . . . . . . . . . .  7
       3.1.4.  Comfort Noise Bitstream Definition . . . . . . . . . .  8
     3.2.  TSVCIS Bitstream Definition  . . . . . . . . . . . . . . .  8
     3.3.  Multiple TSVCIS Frames in an RTP Packet  . . . . . . . . . 10
     3.4.  Congestion Control Considerations  . . . . . . . . . . . . 11
   4.  Payload Format Parameters  . . . . . . . . . . . . . . . . . . 11
     4.1.  Media Type Definitions . . . . . . . . . . . . . . . . . . 11
     4.2.  Mapping to SDP . . . . . . . . . . . . . . . . . . . . . . 13
     4.3.  Declarative SDP Considerations . . . . . . . . . . . . . . 14
     4.4.  Offer/Answer SDP Considerations  . . . . . . . . . . . . . 15
   5.  Discontinuous Transmissions  . . . . . . . . . . . . . . . . . 15
   6.  Packet Loss Concealment  . . . . . . . . . . . . . . . . . . . 16
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 16
   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 16
   9.  RFC Editor Considerations  . . . . . . . . . . . . . . . . . . 17
   10.  References  . . . . . . . . . . . . . . . . . . . . . . . . . 17
     10.1.  Normative References  . . . . . . . . . . . . . . . . . . 17
     10.2.  Informative References  . . . . . . . . . . . . . . . . . 19
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 19

1.  Introduction

   This document describes how compressed Tactical Secure Voice
   Cryptographic Interoperability Specification (TSVCIS) speech as
   produced by the TSVCIS codec may be formatted for use as an RTP
   payload.  The TSVCIS speech coder (or TSVCIS speech aware
   communications equipment on any intervening transport link) may
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