Method of and circuit arrangement for establishing conference co

Details Method of and circuit arrangement for establishing conference co Method of and circuit arrangement for establishing conference co

1984-08-20

1986-08-19

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

179 18BC, H04Q 1104

Patent

active

046073620

ABSTRACT:
During algebraic summing of code words from conference participants to form a partial sum-code word overflow of the values may occur. Such an overflow can be prevented when prior to the adding operations the numerical range is extended and an adjustment of weighting factors is effected in dependence on the measured speech intensity of the partial sum-code word. By multiplying by these (attenuation) factors the outgoing subscriber-code word is mapped again on the original numerical range in the attenuation circuit. To reduce a noise level originating, for example, from line interferences, quantization errors, etc. subscribers which are currently not speaking can be attenuated in a further attenuation control circuit of the conference arrangement.

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