Patent ID: 6011579
Filing Date: 2000-01-04
Classification: H04N

Abstract:
A video access apparatus, comprising:a wireline network interface coupleable to a first communication channel, the wireline network interface having an ISDN interface for reception of a first ISDN encoded H.32x digital audio/video protocol signal, for transmission of a second ISDN encoded H.32x digital audio/video protocol signal, and for transmission and reception of a digital telephony signal;a radio frequency modulator to convert a baseband NTSC/encoded composite output video signal to a radio frequency amplitude modulated vestigial sideband output video signal;a radio frequency demodulator to convert a radio frequency amplitude modulated vestigial sideband input video signal to a baseband NTSC/encoded composite input video signal;an audio interface for reception of an input analog audio signal and conversion of the input analog audio signal to an input digital audio signal, and for conversion of an output digital audio signal to an output analog audio signal and for output of the output analog audio signal;a microprocessor subsystem coupled to the wireline network interface and the audio interface, the microprocessor subsystem responsive, through a set of program instructions, to decode the first ISDN encoded H.32x digital audio/video protocol signal to form an H.32x encoded output audio/video digital data stream, the microprocessor subsystem further responsive to convert an H.32x encoded input digital audio signal and an H.32x encoded input video signal data stream to the second ISDN encoded H.32x digital audio/video protocol signal; andan audio/video compression and decompression subsystem coupled to the microprocessor subsystem, and further coupled to the radio frequency modulator and to the radio frequency demodulator, the audio/video compression and decompression subsystem responsive, through the set of program instructions, to convert and compress the baseband NTSC/encoded composite input video signal to the H.32x encoded input video signal data stream, to convert and compress the input digital audio signal to the H.32x encoded input digital audio signal, and to decompress and convert the H.32x encoded output audio/video digital data stream to the baseband NTSC/encoded composite output video signal and the output digital audio signal.