Cable television audio messaging systems
First Claim
1. A multi-channel audio messaging system for cable television for enabling multiple different input audio messages to be supplied to multiple different channels of a cable television system, the cable television system having a headend where multiple external program signals are channelized by means of individual channel modulators having program signal input ports and are exported to a cable network for transmission to a subscriber audience, said audio messaging system being installable at a cable television headend and comprising:
- multiple analog audio input message sources multiplexed by an analog audio multiplexer to provide a multiplexed audio input, digital conversion means to digitize the multiplexed audio input and output digitized audio signals, means to switch and control the digitized audio signals and decoder means to read and select from the digitized audio signals to provide different audio messages on desired channels.
1 Assignment
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Accused Products
Abstract
A multi-channel audio messaging system for cable television, installed at the headend, enables multiple different input audio messages to be supplied to multiple different channels of a cable television system. Multiple analog audio input message sources are supplied as a multiplexed audio input to a digitizer which outputs digitized audio signals which are switched and decoded, under the control of a microprocessor to provide different audio messages on desired channels.
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Citations
6 Claims
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1. A multi-channel audio messaging system for cable television for enabling multiple different input audio messages to be supplied to multiple different channels of a cable television system, the cable television system having a headend where multiple external program signals are channelized by means of individual channel modulators having program signal input ports and are exported to a cable network for transmission to a subscriber audience, said audio messaging system being installable at a cable television headend and comprising:
multiple analog audio input message sources multiplexed by an analog audio multiplexer to provide a multiplexed audio input, digital conversion means to digitize the multiplexed audio input and output digitized audio signals, means to switch and control the digitized audio signals and decoder means to read and select from the digitized audio signals to provide different audio messages on desired channels. - View Dependent Claims (2, 3, 4, 5, 6)
Specification