Fujitsu Corporation

Youichi Ashida

Hitoshi Sato

Yuji Yoshida

Hiroaki Natori

Hitoshi Ishiguro

Masakazu Yamaguchi

Takehiko Fujiyama

Takato Ohashi

Hajime Kamata

Kiyohide Yamashita

Makoto Kawatoko

Nobuyuki Kaneko

Ryusaku Imai

Toshihiro Homma

Kouichi Tsuzaki

Toshinori Shima

Noriko Okutsu

Yu Jun Cui

A data sending system which prevents a parity error occurrence in a data receiving unit is provided. The data sending system provided is related to data sending systems and, particularly, to a data sending system where plurality of data sending units share a path for data transmission. The data sending system provided comprises a network consisting of a data path and control path, a control unit for instructing data sending through said control path, one or plural data sending units for sending, according to an instruction from said control path, data to a specific one of plural logical paths of said data path, and a data receiving unit permanently connected to the one of plural logical paths of said data path. Said control unit has a determining section which determines a time span, during which no sending data exists in a logical path connected to said data receiving unit, and also instructs a specific unit of said data sending units to send dummy data during the time span. Said data sending unit has a dummy data sending unit which sends the dummy data, to which an appropriate parity information is added, according to said instruction.

Data sending system

A video telecommunication system having a plurality of cameras (video cameras) installed at remote locations and a monitor for monitoring the video, provided with a video information describing unit for sending a switch command for the camera to a video transmission apparatus, simultaneously sending character information describing the video information of the camera in accordance with the switch command, and having the video information and the character information displayed on the monitor, whereby it is possible to easily record, change, and correct character information on the place name etc. combined with the video information.

Video telecommunication system

A video conferencing system uses video conferencing terminals at a number of locations to allow each of participants in a video conference to watch other participants he or she wants to watch in a desired array using a small amount of hardware. The system comprises first image reduction and storage units for reducing images from the terminals at a reduction ratio for speaker's image and storing the reduced images, second image reduction and storage units for reducing the images from the terminals at a reduction ratio for non-speaker's image and storing the reduced images, image readout control units for reading the reduced image stored in a corresponding one of the second image reduction and storage units in such a way that a plurality of reduced images identical to that reduced image can be displayed on one display screen, and an image selecting and combining unit for generating a composite image and outputting it to receiving terminals.

Multi-location video conferencing system

A camera controlling apparatus for a television conference system wherein the turning speed of a camera is varied in response to an operation mode. The camera controlling apparatus includes a preset control section for outputting a preset control signal for moving the camera at a first turning speed to a predetermined point, and a self room manual control section for outputting a self room manual control signal for moving the camera at a second turning speed lower than the first turning speed. The camera controlling apparatus further includes a reception manual control section for outputting a reception manual control signal for moving the camera at a third turning speed lower than the second turning speed in response to a manual signal transmitted thereto by way of a communication line. Any of the control signals is inputted to a speed control section, and the camera is controlled to be turned at a turning speed represented by the thus inputted control signal by the speed control section.

Camera controlling apparatus for television conference system

A television conference system having at least one of the functions of automatically directing a camera toward a speaker, of transmitting video signals of picture images from a plurality of television cameras, and of displaying a document image. The television conference system includes a microphone input judgement unit for judging the existence of any input into microphones provided for the speakers of a television conference; a judgement result holding unit for holding the results of the judgement of existence of the microphone inputs over a first predetermined period, the first predetermined period being longer than the shortest period of continuous speaking; a time totaling unit for obtaining the total time of the microphone inputs during the first predetermined period from the results of judgement held in the judgement result holding unit; a speaker specifying unit for specifying as the current speaker the speaker using a microphone having a total time obtained by the time totaling unit which is over a second predetermined period, the second predetermined period being the standard continuing period of noise; and a camera drive unit for driving a camera within a shooting range of the speaker specified as the current speaker by the speaker specifying unit.

Television conference system

A multi-point conference system for making a video conference includes a center unit having a controller and an image selector, and three or more stations respectively coupled to the center unit, where each station includes at least one camera for picking up an image to output an image data, a display for displaying an image based on an image data and a request part for making a request. The controller initially sets master, sub and participating stations in conformance with a predetermined rule. The image selector automatically supplies the image data from the master station to the sub and participating stations to be displayed on the display thereof and supplies the image data from the sub station to the master station to be displayed on the display thereof. The controller automatically sets a new master station in response to a request from the request part of an arbitrary station requesting the new master station, sets the master station prior to receiving the request as a new sub station and sets all stations other than the new master and sub stations as new participating stations.

Multi-point conference system

Growing community of inventors

Kawasaki, Japan

Youichi Ashida