Direct digital encoding and radio frequency modulation for broadcast television application
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United States of America Patent
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May 18, 2010
Grant Date -
Mar 23, 2006
app pub date -
Sep 16, 2005
filing date -
Sep 17, 2004
priority date (Note) -
Expired
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Abstract
A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard and then combined to form a stereo audio signal. A second audio programming channel signal may be included. A video input can be digitized and conditioned to form a digital video channel. The stereo audio signal can be placed directly at a desired channel frequency by frequency modulation without the need for using an intermediate frequency. The digital video channel can be placed at a desired frequency by amplitude modulation. The digital and audio channels can be digitally combined to create a television transmission signal at a desired frequency and according to a desired standard.
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