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General Transmission Considerations in Telephone Conference Systems

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1 Author(s)
Mitchell, D. ; Bell Telephone Labs., Holmdel, NJ, USA

A general discussion of the transmission problems involved in telephone conference systems due to noise, echo, and singing is presented. The application of voice switched loss seems to be the best way to alleviate these difficulties. New problems must now be considered due to weak talkers and occasional simultaneous talking. Two types of conference connections are discussed: First, when three or more telephones are connected together, and second, when groups of people at two or more locations talk back and forth using microphones and loudspeakers. Recent work discussed here provides substantial transmission improvement for this type of service.

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Communication Technology, IEEE Transactions on  (Volume:16 ,  Issue: 1 )