Optical disc audio reproduction device having track playback monitoring system
First Claim
1. Apparatus for reproducing audio signals encoded on optical discs as audio tracks and monitoring playbacks of said audio tracks encoded on said optical discs by said apparatus, comprising:
- signal detection means for detecting data signals encoded on an optical disc as a collection of numbered audio tracks, said encoded data signals corresponding to each of said audio tracks having an audio data component and a non-audio data component which contains information identifying said optical disc;
track selection means for selecting one of said audio tracks encoded on said optical disc for playback;
first memory means electrically connected to said track selection means, said first memory means storing a number corresponding to said audio track selected with said track selection means;
servo control means electrically connected to said track selection means, said servo control means positioning said signal detection means and rotating said optical disc in response to selection of one of said audio tracks by said track selection means such that said signal detection means reads said encoded data signals corresponding to said selected audio track;
demodulation means for separating said audio and non-audio data components of said encoded data signal detected by said signal detection means;
second memory means for storing said information identifying said optical disc contained in said non-audio data component;
said audio data component separated by said demodulation means being transmittable to a sound system for audible reproduction of said selected audio track and said information identifying said optical disc contained in said non-audio data component separated by said demodulation means being transmitted to said second memory means; and
third memory means for storing, for each optical disc track selected by said track selection means, said number stored in said first memory means by said track selection means and said information identifying said optical disc stored in said second memory means by said demodulation means.
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Abstract
Apparatus and method for monitoring audio track playbacks by an optical disc audio reproduction device. A track number corresponding to an audio track encoded on an optical disc is selected to initiate playback of the selected audio track and a corresponding track number is stored in a first memory device. A series of data frames, each having an audio data block and a non-audio subcode block containing a single Q data bit, which define the selected audio track are then read from the optical disc. The data frames are transmitted to a demodulator circuit where the non-audio subcode block is separated from the audio data block. The non-audio subcode block is then transmitted to a microprocessor where the single bit of Q data subcode from each frame is assembled into a Q data subcode block. A portion of the Q data subcode block which contains a UPC code identifying the optical disc is transmitted to a second memory device. The contents of the first and second memory device are then combined in a third memory device to provide a record of audio track playbacks performed by the optical disc audio reproduction device.
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Citations
19 Claims
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1. Apparatus for reproducing audio signals encoded on optical discs as audio tracks and monitoring playbacks of said audio tracks encoded on said optical discs by said apparatus, comprising:
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signal detection means for detecting data signals encoded on an optical disc as a collection of numbered audio tracks, said encoded data signals corresponding to each of said audio tracks having an audio data component and a non-audio data component which contains information identifying said optical disc; track selection means for selecting one of said audio tracks encoded on said optical disc for playback; first memory means electrically connected to said track selection means, said first memory means storing a number corresponding to said audio track selected with said track selection means; servo control means electrically connected to said track selection means, said servo control means positioning said signal detection means and rotating said optical disc in response to selection of one of said audio tracks by said track selection means such that said signal detection means reads said encoded data signals corresponding to said selected audio track; demodulation means for separating said audio and non-audio data components of said encoded data signal detected by said signal detection means; second memory means for storing said information identifying said optical disc contained in said non-audio data component; said audio data component separated by said demodulation means being transmittable to a sound system for audible reproduction of said selected audio track and said information identifying said optical disc contained in said non-audio data component separated by said demodulation means being transmitted to said second memory means; and third memory means for storing, for each optical disc track selected by said track selection means, said number stored in said first memory means by said track selection means and said information identifying said optical disc stored in said second memory means by said demodulation means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Apparatus for reproducing audio signals encoded on optical discs as audio tracks and monitoring playbacks of said audio tracks encoded on said optical discs by said apparatus, comprising:
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signal detection means for detecting data signals encoded on an optical disc as a collection of numbered audio tracks, each said audio track comprised of a plurality of data frames and each said frame of data comprised of an audio data block and at least one non-audio data bit; track selection means for selecting one of said audio tracks encoded on said optical disc for playback; first memory means having an input electrically connected to said track selection means and an output, said first memory means storing a number corresponding to said audio track selected with said track selection means; processor means having first and second inputs and first and second outputs, said first input electrically connected to said track selection means for receiving said number corresponding to said audio track selected thereby; servo control means electrically connected to said first output of said processor means, said servo control means controlling the positioning of said signal detection means and the rotating of said optical disc in response to selection of one of said audio tracks by said track selection means such that said signal detection means reads said encoded data signals corresponding to said selected audio track; demodulation means for separating said audio and non-audio data components of said encoded data signal detected by said signal detection means, said audio data component separated by said demodulation means being transmittable to a sound system for audible reproduction of said selected audio track; said processor means further comprising means for assembling said at least one non-audio data bit for successive data frames into a non-audio data block containing said information identifying said optical disc; second memory means having an input connected to a first output of said processor means and an output, said information identifying said optical disc contained in said assembled non-audio data block being transmitted to said second memory means; and a connector socket plug having first and second contacts connected to said outputs of said first and second memory means, respectively; a timing circuit for clocking the contents of said first and second memory means to said first and second inputs of said connector plug upon detection, by said demodulation means, of a next data frame after storage of said number corresponding to said selected audio track in said first memory means and storage of said non-audio data block identifying said optical disc in said second memory means; wherein an external storage device having connector plug means insertably mounted in said connector socket will receive the contents of said first and second memory means for storage therein, thereby proving a record of audio tracks playbacks performed by said optical disc audio reproduction device. - View Dependent Claims (9, 10)
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11. A method for monitoring audio track playbacks by an optical disc audio reproduction device, comprising the steps of:
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loading an optical disc having at least one audio track encoded thereon into an optical disc audio reproduction device, each said audio track having a track number assigned thereto; selecting a track number corresponding to one of said audio tracks encoded on said optical disc to initiate playback of said selected audio track by said optical disc audio reproduction device; storing said track number in a first memory device; reading said selected audio track from said optical disc, said selected audio track having a non-audio code incorporated therein for identifying said optical disc; storing said non-audio code read from said selected audio track in a second memory device; combining, in a third memory device, said track number and said non-audio optical disc identification code to provide a record of audio track playbacks performed by said optical disc audio reproduction device. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for monitoring audio track playbacks by an audio reproduction device, comprising the steps of:
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loading a digital audio medium having at least one audio track digitally encoded thereon into an audio reproduction device, each said audio track having a track number assigned thereto; selecting a track number corresponding to one of said audio tracks encoded on said digital audio medium to initiate playback of said selected audio track by said audio reproduction device; storing said track number in a first memory device; reading said selected audio track from said digital audio medium, said selected audio track having a non-audio code incorporated therein for identifying said digital audio medium;
selected audio track in a second memory device;combining, in a third memory device, said track number and said non-audio digital audio medium identification code to provide a record of audio track playbacks performed by said audio reproduction device. - View Dependent Claims (19)
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Specification