Television – Format – Including additional information
Reexamination Certificate
2005-10-04
2005-10-04
Hsia, Sherrie (Department: 2614)
Television
Format
Including additional information
C348S485000, C348S705000, C348S706000, C348S724000, C348S726000
Reexamination Certificate
active
06952237
ABSTRACT:
Disclosed is a method and apparatus for transmission of audio signals over a dedicated video transmission line in which the analog audio signal is inserted into and becomes a part of the video signal. Samples of the audio signal are inserted into the active video line, either at the beginnings or endings, or both, of each active video line scan signal. A defined amount of the active video interval is reserved from the active video line, and is replaced with samples of the analog audio signal. An analog switch in the modulator of the invention toggles to pick up the samples of audio and place them at the designated location (either at the beginnings or at the ends) of each active video line scan signal. A corresponding switch in the demodulator of the invention toggles to retrieve the audio samples from the active video line scans for output to the user. Stereo and/or bi-directional audio signals can be transmitted by insertion into both the beginnings and the endings of the active video line scan signals.
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Hsia Sherrie
Miller Mark D.
Pelco
LandOfFree
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