Patent ID: 6049769
Filing Date: 2000-04-11
Classification: G11B,H04N

Abstract:
An audio/video input/output (I/O) apparatus for acquiring digital audio samples from one or multiple channels of input audio and, alternately, synthesizing digital audio samples into one or multiple channels of output audio, the apparatus comprising:a video I/O port circuit comprising a video input port configured to input video, and a video output port configured to output video;a circuit generating a video synchronization signal and a video clock based on the synchronization signal;an m/n phase lock loop, connected to receive the video synchronization signal, generating an audio sampling clock as an adjustable ratio of said video clock; andan audio I/O port circuit, connected to receive the audio sampling clock, comprising an audio input port configured to sample and convert input analog audio into digital audio samples according to said sampling clock, and an audio output port configured to synthesize digital audio samples into output analog audio according to said sampling clock.