Additive pcm speaker circuit for a time shared conference...

Details Additive pcm speaker circuit for a time shared conference... Additive pcm speaker circuit for a time shared conference...

H - Electricity

04

Q

344/14

H04Q 11/04 (2006.01) H04M 3/56 (2006.01)

Patent

CA 1310094

ADDITIVE PCM SPEAKER CIRCUIT FOR A TIME SHARED CONFERENCE ARRANGEMENT ABSTRACT OF THE INVENTION A time shared multiport conference arrangement includes an additive PCM speaker circuit. The additive PCM speaker circuit eliminates the need for loudest speaker detection and last speaker memory of conventional conferencing arrangements. The additive PCM speaker circuitry operates in an on-line, real time environment to allow rapid combination of speakers' PCM voice samples. Since the PCM voice samples are logarithmic in nature, they are not directly combinable. The additive PCM speaker circuitry provides a storage medium which is preprogrammed with resultant values. These resultant values each correspond to an additive combination of the values of two input speaker's PCM voice samples. The additive PCM speaker circuit simplifies the complex processing logic usually associated with loudest speaker detection systems and thereby improves the real time operation of the conferencing arrangement.

581833

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