发明名称 |
Multichannel television sound stereo and surround sound encoder |
摘要 |
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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申请公布号 |
US5953067(A) |
申请公布日期 |
1999.09.14 |
申请号 |
US19970918754 |
申请日期 |
1997.08.25 |
申请人 |
CABLE ELECTRONICS, INC. |
发明人 |
AVALOS, SEALTIEL;KAYLOR, KEN;KAYLOR, ROBERT;KESSLER, ROBERT |
分类号 |
H04N5/40;G11B27/10;G11B27/28;H04B1/62;H04H20/89;H04N5/14;H04N5/60;H04N7/08;H04N7/081;H04S3/00;(IPC1-7):H04N7/04 |
主分类号 |
H04N5/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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