Digital audio data reproduction apparatus
AssigneePioneer Electronic Corporation
InventorHitoshi Kanamaru
Life of this patent
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Abstract
A digital audio data playback apparatus such as a digital audio disc player is configured such that a PCM encoder and associated circuits within the apparatus can be used both for playback of recording discs having only digital audio data recorded thereon and also for processing a digital audio signal output from a video disc player during playback of a video recording disc having digital audio data recorded thereon, superimposed upon frequency-modulated recorded audio and video data. This eliminates the need to provide a PCM encoder circuit within such a video recording disc player.
Claims7
A digital audio data reproducing apparatus comprising:
- a first input terminal for receiving audio data modulated as a serial pulse train from a signal source capable of producing digital audio data;
- a second input terminal for receiving a squelch signal associated with said audio data, produced in said signal source;
- demodulation means for demodulating said serial pulse train to produce a reproduction signal when said audio data is supplied through said first input terminal;
- squelch circuit means connected to said demodulation means for squelching said reproduction signal in response to a control signal;
- and
- squelch control means for supplying said squelch signal through said second input terminal to said squelch circuit means as said control signal when said audio data modulated as said serial pulse train is supplied to said first input terminal.
Dependencies are inferred from the claim text.