Video teleconferencing system employing aspect ratio transformat

Details Video teleconferencing system employing aspect ratio transformat Video teleconferencing system employing aspect ratio transformat

1991-10-09

1994-01-18

Chan, Wing F.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

358528, H04N 142

Patent

active

052805409

ABSTRACT:
A teleconferencing system (100, 100') provides a wide aspect ratio view at each site utilizing a single NTSC camera (250, 350) and projector (260,360). At the transmitting end of a teleconference, a transformation element (280, 380, 510, 610) maps a wide aspect ratio field of view into the field of view of an NTSC camera. The transformation is reversed at the receiving end of the teleconferencing system.

REFERENCES:
patent: 3097262 (1963-07-01), Ehrenhaft
patent: 4054908 (1977-10-01), Poirier et al.
patent: 4223343 (1980-09-01), Belmares-Sarabia et al.
patent: 4400724 (1983-08-01), Fields
patent: 4839720 (1989-06-01), Isnardi
patent: 4890314 (1989-12-01), Judd et al.
patent: 4928301 (1990-05-01), Smoot

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