发明授权
US5091936A System for communicating television signals or a plurality of digital
audio signals in a standard television line allocation
失效
用于在标准电视线路分配中传送电视信号或多个数字音频信号的系统
- 专利标题： System for communicating television signals or a plurality of digital audio signals in a standard television line allocation
- 专利标题（中）： 用于在标准电视线路分配中传送电视信号或多个数字音频信号的系统
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申请号： US647827申请日： 1991-01-30
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公开(公告)号： US5091936A公开(公告)日： 1992-02-25
- 发明人: Ron D. Katznelson , Paul Moroney , W. Allen Shumate
- 申请人： Ron D. Katznelson , Paul Moroney , W. Allen Shumate
- 申请人地址： PA Hatboro
- 专利权人： General Instrument Corporation
- 当前专利权人： General Instrument Corporation
- 当前专利权人地址： PA Hatboro
- 主分类号： H04H20/33
- IPC分类号： H04H20/33 ; H04H60/23 ; H04K1/00 ; H04N7/04
摘要：
A system is provided for selectively transmitting horizontal television lines including video and digital audio components or equivalent digital data lines containing a plurality of audio program signals. A conventional television signal transmission places a digital audio signal in the horizontal blanking interval, followed by analog video information. In accordance with the present invention, the "window" containing the analog video information is replaced with a plurality of digital audio signals that are time division multiplexed within the window. An additional audio channel is placed in the horizontal blanking interval, at the same location the audio is placed when video information is transmitted. Selector switches are provided in the encoder and decoder for processing a composite waveform as either a video signal with an associated audio channel, or as a multiple channel digital audio signal. Independent encryption and decryption of each of the multiple audio channels is provided.
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