Multi-point control unit for use in multi-point videoconference

Details Multi-point control unit for use in multi-point videoconference Multi-point control unit for use in multi-point videoconference

1998-01-09

1999-07-27

Kuntz, Curtis A.

Television

Two-way video and voice communication

User positioning

348 14, 348 17, H04N 714

Patent

active

059298987

ABSTRACT:
In a multi-point control unit for use in a multi-point videoconference system, an encoding controller is connected to first through N-th decoders and an encoder to produce a controlling signal in response to first through N-th decoding information signals supplied from the first through the N-th decoders and to supply the controlling signal to the encoder. The encoder is connected to a picture combining section to encode a combined signal supplied from the picture combining section into a combined picture data signal so that each of divisional picture signals included in the combined signal is encoded by the use of individual quantizing characteristic controlled by the controlling signal. A data exchanger is connected to the encoder to transmit the combined picture data signal to the first through the N-th videoconference terminals through a network. The first through the N-th decoders are connected to the data exchanger and decodes first through N-th terminal picture data signals sent from the first through the N-th videoconference terminals through the network, respectively, to produce first through N-th decoded signals and the first through the N-th decoding information signals and reduces the first through the N-th decoded signals to produce first through N-th divisional picture signals. A picture combining section is connected to the first through the N-th decoders to select M from the first through the N-th divisional picture signals and to produce the combined signal.

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