Ken M Kaylor

US Patent:

59530677, Sep 14, 1999

Filed:

Aug 25, 1997

Appl. No.:

8/918754

Inventors:

Sealtiel Avalos - Dallas TX
Ken Kaylor - Dallas TX
Robert Kaylor - Rowlett TX
Robert Kessler - Dallas TX

Assignee:

Cable Electronics, Inc. - Garland TX

International Classification:

H04N 704

US Classification:

348485

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.