Multi-location control apparatus, television conference terminal unit, and multi-location television conference system

• US 5,638,114 A
• Filed: 03/17/1994
• Issued: 06/10/1997
• Est. Priority Date: 04/07/1993
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Fujitsu Limited
• Inventors: Hatanaka, Masanobu, Sano, Shoichi, Natori, Hiroaki, Tamuki, Shoichi, Okazaki, Reiko, Takei, Hitoshi
• Primary Examiner(s): Peng, John K.
• Assistant Examiner(s): Flynn, Nathan J.
• Application Number:
  US08/214,316
• Time in Patent Office: 1,181 Days
• Field of Search: 348/12-16, 348/6, 348/17, 455/5.1, 455/3.1
• US Class Current: 348/14.09
• CPC Class Codes: H04N 7/15 Conference systems
• CPC Class Codes: H04N 7/152 Multipoint control units therefor

Abstract

In a multi-location television conference system that connects five locations A, B, C, D, and E, when speeches take place at the four locations A, B, C, and D at the same time, at a listening location E, images of all the speaking locations A, B, C, and D are displayed on one screen with four divided screen areas. On the other hand, at the speaking location A, images of the speaking locations B, c, and D and an image of the former speaking location E are displayed on one screen with four divided screen areas. In addition, when images of speaking locations are displayed, locations names thereof are also displayed. Thus, a television conference held at a plurality of locations at a time can be smoothly managed as with a real conventional conference.

Claims

1. A multi-location control apparatus for use with a multi-location television conference system that has a plurality of multi-location television conference terminal units disposed at at least three locations, each of said television conference terminal units for transmitting and receiving sound data and image data, said multi-location control apparatus for receiving the sound data and the image data from all of said television conference terminal units and for transmitting the sound data and the image data to said television conference terminal units, said multi-location control apparatus comprising:

speaking location detecting means for detecting a speaking location corresponding to sound signals that are output from sound input means of each of said television conference terminal units;

image combining means for designing a layout of a display area corresponding to the number of speaking locations for each television conference terminal unit and generating the image data containing images of the speaking locations to be displayed in the designed display area of each television conference terminal unit when a plurality of speaking locations are detected by said speaking location detecting means; and

image distributing means for transmitting image data generated by said image combining means to each of said television conference terminal units for display on said each of said television conference terminal units.

2. The multi-location control apparatus as set forth in claim 1,

wherein said image combining means generates and transmits the image data of the speaking locations detected by said speaking location detecting means to ones of said television conference terminal units at listening locations where sound is not detected by said speaking location detecting means, the transmitted image data of all of the speaking locations being simultaneously displayed on a single screen of each of the television conference terminal units of the listening locations, and

wherein said image distributing means distributes the image data of the speaking locations to the television conference terminal units of the listening locations.

3. The multi-location control apparatus as set forth in claim 1,

wherein said image combining means generates the image data of other speaking locations and a former speaking location for each of the speaking locations, the image data being contained in one screen of each speaking location, and

wherein said image distributing means transmits the image data of the other speaking locations to television conference terminal units of the speaking locations.

4. A multi-location television conference system having a plurality of television conference terminal units and comprising:

speaking location detecting means for detecting a speaking location corresponding to sound signals that are output from sound input means of each of said television conference terminal units;

image combining means for designing a layout of a display area corresponding to the number of speaking locations for each television conference terminal unit and generating the image data containing images of the speaking locations to be displayed in the designed display area of each television conference terminal unit when a plurality of speaking locations are detected by said speaking location detecting means; and

image distributing means for transmitting image data generated by said image combining means to each of said television conference terminal units for display on said each of said television conference terminal units.

5. The multi-location television conference system as set forth in claim 4,

wherein said image combining means generates and transmits the image data of the speaking locations detected by said speaking location detecting means to ones of said television conference terminals at listening locations where sound is not detected by said speaking location detecting means, the transmitted image data of all of the speaking locations being simultaneously displayed on a single screen of each of the television room units of the listening locations, and

wherein said image distributing means distributes the image data of the speaking locations to the television conference terminal units of the listening locations.