System and method for controlling play of digital audio equipment
First Claim
Patent Images
1. A system for controlling play of digital audio equipment, the system comprising:
- a disc including a control signal indicative of speed of disc play, directionality of disc play, and place on the disc of play,wherein the disc includes a carrier frequency in the audible range between 20 and 20,000 Hz with an absolute control signal indicative of position of play on the disc;
a digital filter processing the control signal to determine a relative control signal based on the difference between a left and right channel of the control signal,wherein the relative control signal indicates directionality of disc movement; and
an output filter utilizing the absolute control signal and the relative control signal to determine an accurate control signal serving to control play of the digital audio equipment.
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Accused Products
Abstract
An apparatus for signal processing, wherein a disc is placed on a turntable and is provided with a groove which can be followed by the pick-up element, and employing a time-code signal wherein during use of the disc the said time-code signal controls the digital audio source.
41 Citations
26 Claims
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1. A system for controlling play of digital audio equipment, the system comprising:
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a disc including a control signal indicative of speed of disc play, directionality of disc play, and place on the disc of play, wherein the disc includes a carrier frequency in the audible range between 20 and 20,000 Hz with an absolute control signal indicative of position of play on the disc; a digital filter processing the control signal to determine a relative control signal based on the difference between a left and right channel of the control signal, wherein the relative control signal indicates directionality of disc movement; and an output filter utilizing the absolute control signal and the relative control signal to determine an accurate control signal serving to control play of the digital audio equipment. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling play of digital audio equipment, the method comprising:
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processing a disc on a turntable, wherein the disc comprises an absolute control signal and a carrier frequency; deriving the absolute control signal from the carrier frequency, wherein the absolute control signal comprises at least one of a right channel and a left channel, and wherein the carrier frequency is in the audible range between 20 and 20,000 Hz; determining a relative control signal by detecting a phase difference between the right channel and the left channel, wherein the relative control signal is determinative of the direction of movement of the disc; utilizing the absolute control signal together with the relative control signal to determine an accurate control signal; and utilizing the accurate control signal to control play of digital audio equipment. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for play of sound from an audio source, comprising:
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processing a disc rotationally on a turntable, wherein the disc comprises an absolute time-code signal; deriving the absolute time-code signal from a carrier frequency, wherein the derived time-code signal comprises at least one of a right channel and a left channel; determining a relative time-code signal by detecting a phase difference between the right channel and the left channel, wherein the relative time-code signal is determinative of the direction of movement of the disc; utilizing the absolute time-code signal together with the relative time-code signal to determine an accurate time-code signal; and utilizing the accurate time-code signal to control play of sound from an audio source. - View Dependent Claims (15, 16, 17)
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18. A system for controlling a digital audio source, comprising:
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a turntable; a disc comprising time-code signals, wherein the time-code signals include absolute time-code signals carried in the audible range of 20 to 20,000 Hz; a pick-up element deriving the time-code signals from the disc while the disc is rotating on the turntable; a filter determining accurate time-code signals from the derived time-code signals; and a receiver using the accurate time-code signals to control a digital audio source. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification