Browse Prior Art Database

ON-CALL AUDIO RECORD/PLAYBACK ON DEMAND

IP.com Disclosure Number: IPCOM000009367D
Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-20
Document File: 1 page(s) / 62K

Publishing Venue

Motorola

Related People

Edward Benyukhis: AUTHOR [+4]

Abstract

The usage of wireless telephones is becoming increasingly important in the business environment. However due to the fading characteristics of the land to mobile RP environment, the wireless voice channels have some risk of delivering a corrupted or muted audio signal. This article introduces a tech- nique of storing and retrieving an audio signal that reduces the risk of losing crucial information.

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MOTOROLA Technical Developments

@

ON-CALL AUDIO RECORD/PLAYBAkK

ON DEMAND

by Edward Benyukhis, Michael Bychowsky, Michael Kloos and Yakov Simkin

INTRODUCTION

  The usage of wireless telephones is becoming increasingly important in the business environment. However due to the fading characteristics of the land to mobile RP environment, the wireless voice channels have some risk of delivering a corrupted or muted audio signal. This article introduces a tech- nique of storing and retrieving an audio signal that reduces the risk of losing crucial information.

THE PROBLEM

  Corruption of real time audio results in loss of time, money and productivity in the work place. Even when tbis corruption is recognized, automatic retransmission of the original audio is not accept- able in voice communication due to its real-time delivery requirements. Audio can be lost entirely.

THE SOLUTION

  The proposed solution requires the XCDR to branch off the audio stream to a capture buffer while it transmits to the subscriber unit (SU). This buffer will continuously be filled with the lastest N-sec- onds (implementation decision) of HDLC packe- tized VSELP compressed audio. With a specific inbound control signal, the SU will be able to "freeze" the storage of audio into the buffer, thus

preserving what was to be sent before going over the RP during that period of time. Since the audio is preserved in the infrastmcmre, it has remained intact without corruption.

  At some later moment me user wo...