Apparatus and related method for generating a tracking error signal in an optical disc drive
First Claim
1. An apparatus for generating a tracking error signal comprising:
- an analog-to-digital conversion module for receiving a plurality of analog signals generated by accessing an optical disc and converting the plurality of analog signals to a plurality of digital signals according to a sampling rate;
a frequency control module coupled to the analog-to-digital conversion module for adjusting the sampling rate according to the plurality of digital signals; and
a signal generation module coupled to the analog-to-digital conversion module for generating the tracking error signal according to the plurality of digital signals;
wherein the frequency control module comprises;
at least a detection module coupled to the analog-to-digital conversion module for generating at least a detection value according to the plurality of digital signals and a plurality of delay signals, wherein the detection value comprises a first detection value and a second detection value and the plurality of delay signals are generated according to the plurality of digital signals; and
a frequency control unit coupled to the detection module for increasing or decreasing the sampling rate by comparing the first and second detection value.
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Abstract
The present invention discloses an apparatus for generating a tracking error signal in an optical disc drive. The disclosed apparatus includes: an analog-to-digital conversion module for receiving a plurality of analog signals generated by accessing an optical disc and for converting the plurality of analog signals into a plurality of digital signals with a sampling rate; a frequency control module coupled to the analog-to-digital conversion module for adjusting the sampling rate according to the plurality of digital signals; and a signal generation module coupled to the analog-to-digital conversion module for generating the tracking error signal according to the plurality of digital signals.
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Citations
11 Claims
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1. An apparatus for generating a tracking error signal comprising:
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an analog-to-digital conversion module for receiving a plurality of analog signals generated by accessing an optical disc and converting the plurality of analog signals to a plurality of digital signals according to a sampling rate; a frequency control module coupled to the analog-to-digital conversion module for adjusting the sampling rate according to the plurality of digital signals; and a signal generation module coupled to the analog-to-digital conversion module for generating the tracking error signal according to the plurality of digital signals; wherein the frequency control module comprises; at least a detection module coupled to the analog-to-digital conversion module for generating at least a detection value according to the plurality of digital signals and a plurality of delay signals, wherein the detection value comprises a first detection value and a second detection value and the plurality of delay signals are generated according to the plurality of digital signals; and a frequency control unit coupled to the detection module for increasing or decreasing the sampling rate by comparing the first and second detection value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for generating a tracking error signal, the method comprising:
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receiving a plurality of analog signals generated by accessing an optical disc and converting the plurality of analog signals to a plurality of digital signals according to a sampling rate; adjusting the sampling rate according to the plurality of digital signals; and generating the tracking error signal according to the plurality of digital signals; wherein the step of generating the tracking error signal further comprises; generating a plurality of delay signals according to the plurality of digital signals; generating at least one increasing signal and at least one decreasing signal according to the plurality of digital signals and the plurality of delay signals; and generating the tracking error signal according to the increasing signal and the decreasing signal. - View Dependent Claims (8, 9)
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10. An apparatus for generating a tracking error signal comprising:
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an analog-to-digital conversion module, for receiving a plurality of analog signals generated by accessing an optical disc and converting the plurality of analog signals to a plurality of digital signals according to a sampling rate; a frequency control module, coupled to the analog-to-digital conversion module, for adjusting the sampling rate according to the plurality of digital signals; and a signal generation module, coupled to the analog-to-digital conversion module, for generating the tracking error signal according to the plurality of digital signals; wherein the frequency control module comprises; a digital logic module, coupled to the analog-to-digital conversion module, for generating a plurality of control signals according to the plurality of digital signals and a plurality of delay signals, wherein the plurality of delay signals are generated according to the plurality of digital signals; an envelope generation unit, coupled to the digital logic module, for generating a detection value according to the plurality of control signals; and a frequency control unit, coupled to the envelope generation unit, for adjusting the sampling rate according to the detection value.
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11. An apparatus for generating a tracking error signal comprising:
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an analog-to-digital conversion module for receiving a plurality of analog signals generated by accessing an optical disc and converting the plurality of analog signals to a plurality of digital signals according to a sampling rate; a frequency control module coupled to the analog-to-digital conversion module for adjusting the sampling rate according to the plurality of digital signals; and a signal generation module coupled to the analog-to-digital conversion module for generating the tracking error signal according to the plurality of digital signals; wherein the signal generation module comprises; a delay module coupled to the analog-to-digital conversion module for delaying the plurality of digital signals to generate the plurality of delay signals; a digital logic module coupled to the analog-to-digital conversion module and the delay module for generating at least one increasing signal and at least one decreasing signal according to the plurality of digital signals and the plurality of delay signals; and an output unit coupled to the digital logic module for generating the tracking error signal according to the increasing signal and the decreasing signal.
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Specification