Television – Format – Including additional information
Patent
1997-08-25
1999-09-14
Lee, Michael H.
Television
Format
Including additional information
348484, 348738, 381106, H04N 704
Patent
active
059530677
ABSTRACT:
The present invention provides an apparatus that transmits the stereo and the surround sound information of the L-R signal without excessive attenuation at the higher frequencies in order to allow transmission of surround sound through a noisy medium. The apparatus includes a surround sound conditioner coupled to receive a L-R signal portion of the television signal for pre-emphasizing and companding the L-R signal to produce a conditioned L-R signal; a mixer coupled to the surround sound conditioner for switching the conditioned L-R signal at a predetermined value to produce an amplitude modulated L-R signal; and a synchronizing circuitry coupled to the mixer for maintaining the predetermined value in step with the reference value, wherein the mixed L-R signal is combined with a L+R signal portion of the television signal to produce a composite output signal. Furthermore, a method of transmitting stereo and surround sound in accordance with multichannel television sound protocol includes the steps of preconditioning a L-R signal; synchronizing the preconditioned L-R signal to a reference value to produce a synchronized L-R signal; and mixing the synchronized L-R signal with a L+R signal to produce a composite output signal.
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National Association of Broadcasters, 8th Edition NAB Engineering Handbook, Mar. 1992, pp. 553-568.
Avalos Sealtiel
Kaylor Ken
Kaylor Robert
Kessler Robert
Booth Matthew J.
Cable Electronics, Inc.
Desir Jean W.
Lee Michael H.
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