Patent ID: 8359417
Filing Date: 2013-01-22
Classification: G06F,H04N

Abstract:
1. An audio/video router for receiving a composite input signal having an audio component and a video component at an input of the router and providing a composite output signal containing the audio component and the video component at an output of the router, the router comprising: a space switch for receiving at least the video component of the composite input signal and delivering the video component to an output of the space switch, and a shared memory time switch comprising: an input formatter for receiving the composite input signal and providing an intermediate stream of data words, a switch core for receiving the intermediate stream of data words and providing the intermediate stream of data words to an output of the switch core, and an output formatter for receiving the intermediate stream of data words from the output of the switch core, wherein the input formatter comprises a demultiplexer for receiving the composite input signal and separating a stream of audio data words at an average frequency F1 from the video component, a FIFO input register for receiving the separated stream of audio data words at an input of the FIFO input register and making the audio data words available successively at an output of the FIFO input register, and a read enable device for polling the output of the FIFO input register at a frequency F2, greater than F1, and, in the event that an audio data word is available at the output of the FIFO input register, conveying the audio data word from the output of the FIFO input register to the switch core and otherwise conveying a null data word to the switch core, whereby the intermediate stream of data words comprises both audio data words and null data words, and wherein the output formatter comprises a multiplexer for combining the audio data words of the intermediate stream with the video component of the input signal delivered to the output of the space switch to provide said composite output signal.