RTP Payload Format for TSVCIS Codec

Document Type Replaced Internet-Draft (individual)
Authors Victor Demjanenko  , John Punaro  , David Satterlee 
Last updated 2018-04-19 (latest revision 2017-10-13)
Replaced by RFC 8817
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IESG IESG state Replaced by draft-ietf-payload-tsvcis
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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 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.


Victor Demjanenko (victor.demjanenko@vocal.com)
John Punaro (john.punaro@vocal.com)
David Satterlee (david.satterlee@vocal.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)