Television – Format – Including additional information
Patent
1990-03-29
1994-10-18
Harvey, David E.
Television
Format
Including additional information
348482, H04N 700
Patent
active
053572840
ABSTRACT:
A method and apparatus for transmitting a digitally modulated Quadrature Phase Keyed (QPSK) audio carrier signal, or a digitally modulated Quadrature Partial Response System (QPRS) audio carrier signal, wherein the audio carrier signal is located 1.2 MHz below the video carrier of an NTSC signal. This places the digital audio signal 300 KHz above the analog FM sound center frequency of the NTSC signal in the adjacent lower channel, 4.8 MHz above the video carrier of the adjacent lower channel NTSC signal and at the edge of the lower vestigal video sideband components of the NTSC signal with which the digital audio signal is associated.
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Dolby Laboratories Licensing Corporation
Gallagher Thomas A.
Harvey David E.
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