Browse Prior Art Database

MULTILEVEL PRIORITY, WITH FEEDBACK, TO CONTROL AND ARBITRATE VOX OPERATION

IP.com Disclosure Number: IPCOM000009670D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-10
Document File: 2 page(s) / 78K

Publishing Venue

Motorola

Related People

Richard Lucas: AUTHOR [+2]

Abstract

A VOX circuit is provided in a digital two-way radio. The VOX circuit provides a measure of the importance of the speech being transmitted. The radio can compare this measure to the importance of a request from a listening radio to interrupt the transmission, and can arbitrate between the two.

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0 M MOTOROLA Technical Developments

  MULTILEVEL PRIORITY, WITH FEEDBACK, TO CONTROL AND ARBITRATE VOX OPERATION

by Richard Lucas and Chris Wright

ABSTRACT

  A VOX circuit is provided in a digital two-way radio. The VOX circuit provides a measure of the importance of the speech being transmitted. The radio can compare this measure to the importance of a request from a listening radio to interrupt the transmission, and can arbitrate between the two.

INTRODUCTION

  Traditional analogue technology for 2-way radio communications has been in use for the last 30 years. The change to digital technology for 2-way radio communications is making possible many fea- tures hitherto difficult or impossible with the tradi- tional aualogue technology.

PROBLEM TO BE SOLVED

  One issue which digital technology brings is the need to develop the man-machine interface to facili- tate operation of the new features which the technol- ogy offers.

PROPOSED SOLUTION TO THE PROBLEM

New features in an advanced 2-way radio can be

enabled by a Voice Operated Transmit (VOX) cir- cuit if it is able to perform more than the usual on/off function. This invention enhances the VOX operation to provide additional features.

  Consider the simple case of two digital radio users engaged in a conversation on a simplex chan- nel. The radios have VOX circuitry. This paper

proposes that an 'interrupt the sender' feature be enabled. The VOX operates conventionally to key the radio when voice activity is detected but...