Screen processing circuit and method of video phone using pictur

Details Screen processing circuit and method of video phone using pictur Screen processing circuit and method of video phone using pictur

1995-12-22

1998-03-31

Chan, Wing F.

Television

Two-way video and voice communication

User positioning

H04M 1100

Patent

active

057344159

ABSTRACT:
A screen processing circuit of a video phone including a camera and a monitor. The screen processing circuit comprises: a picture-in-picture key for selecting a transmitting-picture-oriented picture-in-picture mode and a picture-in-picture key for selecting a received-picture-oriented picture-in-picture mode; an encoder frame buffer for storing a video signal provided from the camera as transmitting-picture on screen data; a coder for compressing the video signal stored in the encoder frame buffer in order to transmit it to the receiving party; a decoder for recovering the compressed data being received from the receiving party; a decoder frame buffer for storing the recovered data as received-picture on screen data; and a picture-in-picture controller which senses an input from one of the picture-in-picture keys and for selecting either one of a transmitting-picture-oriented picture-in-picture mode and a received-picture-oriented picture-in-picture mode, and reduces the corresponding picture data by a frame unit according to the selected mode to thereby combine the reduced data with the rest picture data and outputs the combined data on the picture of the monitor, thereby controlling the transmitting-picture on screen and the received-picture on screen to be simultaneously outputted in a form of picture-in-picture screen.

REFERENCES:
patent: 4715059 (1987-12-01), Cooper-Hart et al.
patent: 5073926 (1991-12-01), Suzuki et al.
patent: 5315391 (1994-05-01), Lee
patent: 5400068 (1995-03-01), Ishida et al.
patent: 5418560 (1995-05-01), Yasuda
patent: 5430473 (1995-07-01), Beecher, II et al.
patent: 5477546 (1995-12-01), Shibata et al.

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