Patent ID: 6643347
Filing Date: 2003-11-04
Classification: H03L,H04N

Abstract:
A clock signal generation apparatus comprising:a receiving portion for receiving a broadcast signal containing reference information; a recording and reproducing portion for recording the broadcast signal received by the receiving portion, and for reproducing the recorded broadcast signal; means for extracting the reference information from the broadcast signal received by the receiving portion; a first oscillator for generating a reference clock signal having a frequency depending on a control signal; a second oscillator for generating a basic signal having a fixed frequency and being independent of said reference information; a first circuit loop for generating a first error signal in response to the reference clock signal generated by the first oscillator and the reference information extracted by the extracting means, and for feeding the first error signal back to the first oscillator as the control signal during the reception of the broadcast signal by the receiving portion; and a second circuit loop for generating a second error signal in response to the reference clock signal generated by the first oscillator and the basic signal generated by the second oscillator, and for feeding the second error signal back to the first oscillator as the control signal during the reproduction of the broadcast signal by the recording and reproducing portion.