Reproducing apparatus

A reproducing apparatus comprising:

• means for reproducing a signal of a run-length-limited code from a recording medium to get a reproduced signal;
• means for sampling the reproduced signal in response to a clock signal to get a sampling-resultant signal;
• a transversal filter including a delay line having taps and delaying the sampling-resultant signal, multipliers for multiplying signals appearing at the taps by tap coefficients to get multiplication results, and an adder for adding the multiplication results into a filtering-resultant signal;
• a temporary decision device for calculating a temporary decision value of the filtering-resultant signal according to a temporary decision procedure, for calculating a difference between the temporary decision value of the filtering-resultant signal and an actual value thereof, and for generating an error signal in response to the calculated difference;
• means for controlling the tap coefficients used in the transversal filter in response to the error signal and the reproduced signal to minimize the error signal;
• and
• means for controlling first ones among the tap coefficients in response to second one among the tap coefficients, the second one differing from the first ones.

A reproducing apparatus comprising:

• means for reproducing a signal from a recording medium to get a reproduced signal;
• means for sampling the reproduced signal in response to a clock signal to get a sampling-resultant signal;
• means for re-sampling the sampling-resultant signal on an interpolation basis to get a re-sampling-resultant signal;
• means for separating one of (1) the sampling-resultant signal and (2) the re-sampling-resultant signal into an odd-sample signal composed of odd-numbered signal samples and an even-sample signal composed of even-numbered signal samples;
• a first transversal filter including a first delay line having first taps and delaying the odd-sample signal, first multipliers for multiplying first tap signals appearing at the first taps by first tap coefficients to get first multiplication results, and a first adder for adding the first multiplication results into a first filtering-resultant signal;
• a first temporary decision device for calculating a temporary decision value of the first filtering-resultant signal according to a temporary decision procedure, for calculating a first difference between the temporary decision value of the first filtering-resultant signal and an actual value thereof, and for generating a first error signal in response to the calculated first difference;
• means for controlling the first tap coefficients in response to the first error signal and the first tap signals to minimize the first error signal;
• means for controlling first ones among the first tap coefficients in response to second one among the first tap coefficients, the second one differing from the first ones;
• a second transversal filter including a second delay line having second taps and delaying the even-sample signal, second multipliers for multiplying second tap signals appearing at the second taps by second tap coefficients to get second multiplication results, and a second adder for adding the second multiplication results into a second filtering-resultant signal;
• a second temporary decision device for calculating a temporary decision value of the second filtering-resultant signal according to the temporary decision procedure, for calculating a second difference between the temporary decision value of the second filtering-resultant signal and an actual value thereof, and for generating a second error signal in response to the calculated second difference;
• means for controlling the second tap coefficients in response to the second error signal and the second tap signals to minimize the second error signal;
• means for controlling third ones among the second tap coefficients in response to fourth one among the second tap coefficients, the fourth one differing from the third ones;
• and
• means for combining the first filtering-resultant signal and the second filtering-resultant signal into a final filtering-resultant signal.

A reproducing apparatus comprising:

• means for reproducing a signal from a recording disc to get a reproduced signal;
• means for sampling the reproduced signal in response to a clock signal to get a sampling-resultant signal;
• a transversal filter including a delay line having taps and delaying the sampling-resultant signal, multipliers for multiplying tap signals appearing at the taps by tap coefficients to get multiplication results, and an adder for adding the multiplication results into a filtering-resultant signal;
• a temporary decision device for calculating a temporary decision value of the filtering-resultant signal according to a temporary decision procedure, for calculating a difference between the temporary decision value of the filtering-resultant signal and an actual value thereof, and for generating an error signal in response to the calculated difference;
• means for controlling the tap coefficients used in the transversal filter in response to the error signal and the tap signals to minimize the error signal;
• and
• means for controlling first ones among the tap coefficients in response to second one among the tap coefficients, the second one differing from the first ones.