Browse Prior Art Database

Specifications for the Network Voice Protocol

IP.com Disclosure Number: IPCOM000128637D
Original Publication Date: 1975-Dec-31
Included in the Prior Art Database: 2005-Sep-16
Document File: 13 page(s) / 47K

Publishing Venue

Software Patent Institute

Related People

Dan Cohen: AUTHOR [+3]

Abstract

1 2. The Control Protocol 3 Summary of the CONTROL Messages 4 Definition of the CONTROL Messages S Definition of the and Negotiation Tables 8 On RENEGOTIATION 10 The Header of Data Messages 10

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 11% of the total text.

Page 1 of 13

THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.

Specifications for the Network Voice Protocol

Dan Cohen

ARPA ORDER NO. 2223

ISIIRR-75-39 March 1976 INFORMATION SCIENCES INSTITUTE 4676 Admiralty TYaylMarinadel ReylCalifornia 90291 UNIVERSITY OF SOUTHERN CALIFORNIA (213 822- 1511

THIS RESEARCH IS SUPPORTED BY THE ADVANCED RESEARCH PROJECTS AGENCY UNDER CONTRACT NO. DAHC15 72 C 0308, ARPA ORDER NO. 2223 PROGRAM CODE NO. 3D30 AND 3P10. VIEWS AND CONCLUSIONS CONTAINED IN THIS STUDY ARE THE AUTHOR'S AND SHOULD NOT BE INTERPRETED AS REPRESENTING THE OFFICIAL OPINION OR POLICY OF ARPA, THE U.S. GOVERNMENT OR ANY OTHER PERSON OR AGENCY CONNECTED WITH THEM.

THIS DOCUMENT APPROVED FOR PUBLIC RELEASE AND SALE; DISTRIBUTION IS UNLIMITED.

CONTENTS

Preface v

Acknowledgments via

1. Introduction 1 2. The Control Protocol 3 Summary of the CONTROL Messages 4 Definition of the CONTROL Messages S Definition of the and Negotiation Tables 8 On RENEGOTIATION 10 The Header of Data Messages 10

3. The LPC Data Protocol 13

4. Examples for the Control Protocol IS

Appendix 1: The Definition of Tables-Set-#1 19 General Comments 21 Comments on the PITCH Table 21 Comments on the GAIN Table 22 Comments on the INDEX7 Table 22 Comments on the INDEX6 Table 22 Comments on the INDEX5 Table 23 The PITCH Table 24 The GAIN Table 26 The INDEX7 Table 27 The INDEX6 Table 29 The INDEXS Table 30

Appendix 2: Implementation Recommendations 31

References 33

PREFACE

The major objective of ARPA's Network Secure Communication (NSC) project is to develop and demonstrate the feasibility of secure, high-quality, low-bandwidth, real-time, full-duplex (two-

University of Southern California Page 1 Dec 31, 1975

Page 2 of 13

Specifications for the Network Voice Protocol

way) digital voice communications over packet-switched computer communication networks. This kind of communication is a very high priority military goal for all levels of command and control activities. ARPA's NSC project will supply digitized speech which can be secured by existing encryption devices. The major goal of this research is to demonstrate a digital high- quality, low-bandwidth, secure voice handling capability as part of the general military requirement for worldwide secure voice communication. The development at IS[ of the Network Voice Protocol described herein is an important part of the total effort.

The major objective of ARPA's Network Secure Communication (NSC) project is to develop and demonstrate the feasibility of secure, high-quality, low-bandwidth, real-time, full-duplex (two- way) digital voice communications over packet-switched computer communication networks. This kind of communication is a very high priority military goal for all levels of command and control activities. ARPA's NSC project will supply digitized speech which can be secured by existing encryption devices. The major goal of this research is to demonstrate a digital high- quality, low-bandwidth, secure voice handli...