초록 ▼

In a multipoint videoconferencing system including a plurality of visual telephone terminals and a multipoint control unit (MCU) connected thereto, shares of the respective visual telephone terminals are determined in the MCU, based on determination of a speaker determined from voice levels and/or a

In a multipoint videoconferencing system including a plurality of visual telephone terminals and a multipoint control unit (MCU) connected thereto, shares of the respective visual telephone terminals are determined in the MCU, based on determination of a speaker determined from voice levels and/or amount of movement in the respective visual telephone terminals. The respective telephone terminals generate pictures at picture rates defined by the respective shares, and generate video data from the pictures at data rates defined by the respective shares. Video data generated in each visual telephone terminal are multiplexed in time division multiplexer in the MCU, and are distributed to the other terminals.

대표청구항 ▼

A method of adaptively controlling a multipoint videoconferencing system including a plurality of visual telephone terminals and a multipoint control unit connected to the plurality of visual telephone terminals, comprising the steps of: a) determining respective shares of the plurality of visual te

A method of adaptively controlling a multipoint videoconferencing system including a plurality of visual telephone terminals and a multipoint control unit connected to the plurality of visual telephone terminals, comprising the steps of: a) determining respective shares of the plurality of visual telephone terminals; b) generating respective video data of moving pictures in the plurality of visual telephone terminals at data rates corresponding to the respective, determined shares of the visual telephone terminals; c) distributing the respective video data generated in each visual telephone terminal to the others of the plurality of visual telephone terminals; and the step (b) further comprising the substeps of: i) generating pictures at picture rates defined by the shares of the respective visual telephone terminals, ii) generating the video data from the pictures at video data rates defined by the shares of the respective visual telephone terminals, and iii) in the substep i), continuously selecting one of an actual picture and a null picture so that the actual picture is selected at the picture rate, thereby to generate the pictures substantially at the picture rate.