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Voice transmission over PC network.

Abdul Rashid, Zainal Abidin and Ismail, Mahamod and Mohd. Ali, Borhanuddin (1990) Voice transmission over PC network. In: The International Conference on IT, 1990, Kuala Lumpur.

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Abstract

With the merger of telecommunication and computer technologies, voice transmission over computer networks has now become possible. This paper describes two types of voice communication over PC networks; a single point-to-point link, using store and forward concept (delayed message technique) for developing voice mail system, and a voice/data integration over Ethernet Local Area Network (LAN). Voice signal sampled from telephone handset is digitized and coded to 4-bit ADPCM codeword by the codec which is interfaced to the PC. In the voice mail example, the digitized data is stored in the PC and subsequently transmitted over a simple point-to-point link to a remote PC. In the second example, the voice data is immediately transmitted via a buffer to the destination station, using Carrier Sense Multiple Access with Collision Detection (CSMA/CD) medium access protocol. A corresponding codec at the receiver end will decode the digitized voice and convert back to analog signal before being played out on the telephone earpiece.

Item Type:Conference or Workshop Item (Paper)
Subject:Voice mail systems.
Subject:Packet switching (Data transmission).
Subject:Computer networks.
Faculty or Institute:Faculty of Engineering
ID Code:18065
Deposited By: Samsida Samsudin
Deposited On:04 Jul 2012 19:22
Last Modified:02 Dec 2013 15:36

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