Topic
S/PDIF
About: S/PDIF is a research topic. Over the lifetime, 39 publications have been published within this topic receiving 639 citations. The topic is also known as: Sony/Philips Digital Interface Format & Sony/Philips Digital Interface.
Papers
Patent•
4 Nov 1991TL;DR: In this article, a two-way video telephony between an originating location and a destination location, each equipped with an audio/video display (television) and an audio-video source (camera) using available channels dedicated for video telecommunication on one or more coaxial cable distribution networks which can be part of existing cable television systems.
Abstract: A system and method for providing two-way video telephony between an originating location and a destination location, each equipped with an audio/video display (television) and an audio/video source (camera) using available channels dedicated for video telephony on one or more coaxial cable distribution networks which can be part of existing cable television systems. Each location is equipped with a network interface unit (NIU) which modulates outgoing audio/video information (which can be in analog or digital form) together with outgoing control messages onto an attached coaxial cable network. The NIU also demodulates incoming audio/video information and incoming control messages received from the attached coaxial network. Upstream signals may be transmitted to a cable network head end and then to the head end serving the destination location using demodulators, A/D converters (if not already in digital form), multiplexers, and the switched digital telecommunications network. If an intra-cable system call is involved, certain processing steps may be eliminated. Users of the system contend for available channels on the cable distribution network, and channel assignments are made on a per call basis, only for the duration of the call.
143 citations
Patent•
17 May 1991TL;DR: In this article, a method and apparatus for transmitting, receiving, and reproducing digital audio signals as discrete carriers similar to standard FM broadcast signals is provided for transmitting and receiving audio signals.
Abstract: A method and apparatus are provided for transmitting, receiving, and reproducing digital audio signals as discrete carriers similar to standard FM broadcast signals. An audio signal is digitized using, for example, adaptive delta modulation techniques. Several channels of audio information, such as left and right stereo channels and a second audio program ("SAP") channel can all be digitized and incorporated onto the digital broadcast signal carrier. The digitized audio signal may be modulated using multiphase modulation of the carrier of an FM broadcast band or cable television band signal. A plurality of audio channels may be digitized and transmitted over the airwaves, or over a cable transmission network. Channels of nondigitized audio channels may be interspersed with the digitized audio channels in the Fm broadcast band. Source material for the digitized audio channels may be provided to a cable headend over the cable transmission network in the 5-30 MHz CATV upstream path, and rebroadcast over the cable transmission network in the forward or "downstream" band.
102 citations
Patent•
26 Feb 1996
TL;DR: In this article, a multi-channel audio messaging system for cable television, installed at the head-end, enables multiple different input audio messages to be supplied to multiple different channels of a cable television system.
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.
90 citations
Patent•
11 Jun 1992TL;DR: In this article, a high-density coaxial interconnect system for connecting an array of closely packed coaxial cable connectors to an electrical signal transmission system while maintaining a ground-shielded signal path through the interconnects is presented.
Abstract: A high-density coaxial interconnect system for connecting an array of closely packed coaxial cable connectors to an electrical signal transmission system while maintaining a ground-shielded signal path through the interconnect system components from coaxial cable to the board.
71 citations
Patent•
31 Mar 1970
TL;DR: In this paper, a single coaxial cable is used to link a video source to a television display and a digital data source to digital data output by means of a single cable.
Abstract: Transmission system for jointly linking a video source to a television display device, and a digital data source to a digital data output by means of a single coaxial cable. A video source and the digital data output are located at one end of the coaxial cable, with the television display device and digital data source located in the vicinity of the other end of the cable. Circuit arrangements are provided at the video source end of the cable, and also at the digital data source end of the cable, for respectively separating the video signal and the digital data signal from each other to thereby facilitate the transmission of video information in one direction through the coaxial cable while digital data is simultaneously transmitted through the cable in the other direction.
27 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2013 | 2 |
| 2012 | 4 |
| 2011 | 1 |
| 2009 | 2 |
| 2008 | 2 |