Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2008-02-27
2009-12-01
Marcelo, Melvin (Department: 2416)
Multiplex communications
Duplex
Transmit/receive interaction control
C370S296000
Reexamination Certificate
active
07626954
ABSTRACT:
There is provided a communication apparatus that includes: a data communication unit which performs half-duplex communication of video frame data with an external device on a video frame-by-video frame basis, a switching unit which switches a transmission direction in which the data communication unit transmits the video frame data, a first control unit which controls the data communication unit to include a start command in the video frame data and send the video frame data, as well as controls the switching unit to switch the transmission direction in response to completion of the sending of the video frame data that includes the start command, and a second control unit which controls the switching unit to switch the transmission direction in response to completion of the reception of the video frame data that includes the start command.
REFERENCES:
patent: 2009/0091656 (2009-04-01), Kitaru et al.
patent: 2009/0116583 (2009-05-01), Lida et al.
patent: 2009/0141180 (2009-06-01), Kondo et al.
patent: H07-222127 (1995-08-01), None
patent: 2000-83209 (2000-03-01), None
patent: 2001-136509 (2001-05-01), None
Japanese Office Action dated Feb. 13, 2009.
Canon Kabushiki Kaisha
Canon USA Inc IP Division
Marcelo Melvin
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