Multiport conference circuit with multi-frame summing and...

Details Multiport conference circuit with multi-frame summing and... Multiport conference circuit with multi-frame summing and...

H - Electricity

04

M

344/14

H04M 3/56 (2006.01)

Patent

CA 1146246

TITLE MULTIPORT CONFERENCE CIRCUIT WITH MULTI-FRAME SUMMING AND VOICE LEVEL CODING ABSTRACT OF THE DISCLOSURE An improved conference circuit for use in a Pulse Code Modulation telephone switching system wherein a number of channels are combined so that a number of subscribers may participate in a common telephone conversation. The conference circuit is provided with a voice level coding arrangement whereby the voice level comparisons used in the speaker selec- tion process are facilitated, and with a multi-frame coded voice level summing arrangement whereby channel switching caused by spurious noise peaks is effec- tively eliminated.

357220

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