Communication terminal apparatus for displaying whether any of a

Details Communication terminal apparatus for displaying whether any of a Communication terminal apparatus for displaying whether any of a

1994-07-27

1996-11-19

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379202, 348 15, H04M 1100

Patent

active

055771076

ABSTRACT:
When it is desired to display an image of another station during a multi-station visual conference, an image request signal is output. A multi-station visual conference communication control device transmits an image of the requested station to the station which requested the image, and transmits the image request signal to the requested station. Upon receipt of the image request signal, a system control circuit causes a synthesis circuit to generate a screen frame signal and stores identifying information regarding the station which has made the request. As a result, a frame is displayed in the periphery of a monitor screen so that the user can know through observation of the frame that the user's own image is displayed at another station. An image request release signal may also be received at a station, in response to which the system control circuit erases the storage of the image request, and causes the synthesis circuit to erase the screen frame signal when there is no other station which requests an image.

REFERENCES:
patent: 4560833 (1985-12-01), Weber et al.
patent: 4893333 (1990-01-01), Baran et al.
patent: 4974254 (1990-11-01), Perine et al.
patent: 5068888 (1991-11-01), Scherk et al.
patent: 5418560 (1995-05-01), Yasuda
patent: 5446491 (1995-08-01), Shibata et al.

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