Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2007-06-05
2007-06-05
Trost, William (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S566000, C455S066100, C348S014020, C348S014050, C348S014110, C348S211200
Reexamination Certificate
active
09481652
ABSTRACT:
A two-way wireless personal video/audio communication system comprises a video mode switch for selecting a desired one of X, N, and R modes, and a video signal control circuit for transferring a video signal from a camera circuit to a display circuit in the N mode, a video signal from a remote terminal to the display circuit in the R mode and the video signal from the camera circuit to the display circuit and a video transmission/reception circuit in the X mode. The display circuit applies an output video signal from the video signal control circuit to a display to reproduce an image picked up by a camera. The camera circuit converts an image incident on a camera lens into an electrical video signal and outputs the electrical video signal to the video signal control circuit. The video transmission/reception circuit modulates an amplified video signal from the video signal control circuit into a radio frequency signal at a selected channel frequency, transmits the modulated radio frequency signal to the remote terminal through the antenna, receives a radio frequency signal from the remote terminal through the antenna at the selected channel frequency, demodulates the received radio frequency signal into a video signal, amplifies the demodulated video signal, and transfers the amplified video signal to the video signal control circuit.
REFERENCES:
patent: 5491507 (1996-02-01), Umezawa et al.
patent: 6335753 (2002-01-01), McDonald
patent: 6535239 (2003-03-01), Kim
patent: 96/38762 (1996-12-01), None
patent: 97/26744 (1997-07-01), None
Lee & Hong
Perez-Gutierrez Rafael
Trost William
Woo Ju Communication Co., Ltd.
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