Reproducing apparatus capable of controlling amplitude and phase characteristics of reproduced signals
AssigneeCanon Kabushiki Kaisha
InventorsKiwamu Kobayashi, Tatsuya Naitoh
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Abstract
In a reproducing apparatus, an equalizing system including a plurality of elements to be controlled is arranged to have its equalizing characteristic simply variable by controlling, with a single parameter, the plurality of elements to be controlled. Further, circuit characteristics of the equalizing system which are based on resonance frequencies and quality factors (Q) are controlled by controlling the resonance frequencies and the quality factors (Q) through the control performed with the single parameter over the plurality of elements to be controlled.
Claims13
A reproducing apparatus comprising:
- reproducing means for reproducing a signal;
- equalizing means for equalizing the signal reproduced by the reproducing means, said equalizing means including a plurality of equalizing circuits having different equalizing characteristics from each other, each of the plurality of equalizing circuits having controllable circuit elements, each of the plurality of equalizing circuits having a resonant frequency and a quality factor which are controllable;
- and
- control means for controlling the resonant frequency and the quality factor of the plurality of equalizing circuits by adjusting the controllable circuit elements of the plurality of equalizing circuits with a common control signal having the same value over the plurality of equalizing circuits to control an equalizing characteristic of said equalizing means defined by the plurality of equalizing circuits according to a predetermined equalizing characteristic.
A reproducing apparatus comprising:
- reproducing means for reproducing a signal;
- equalizing means for equalizing the signal reproduced by the reproducing means, said equalizing means including an amplitude equalizing circuit for controlling an amplitude of the reproduced signal and a group-delay equalizing circuit for controlling a group-delay of the reproduced signal, each of the amplitude equalizing circuit and the group-delay equalizing circuit having controllable circuit elements;
- and
- control means for controlling an equalizing characteristic of said equalizing means according to a predetermined amplitude equalizing characteristic and a predetermined group-delay equalizing characteristic by adjusting the controllable circuit elements of the amplitude equalizing circuit and the group-delay equalizing circuit with a common control signal having the same value over the amplitude equalizing circuit and the group-delay equalizing circuit.
A signal processing apparatus comprising:
- reproducing means for reproducing a signal;
- equalizing means for equalizing the signal reproduced by the reproducing means, said equalizing means comprising an amplitude equalizing circuit for controlling an amplitude of the input signal and a group-delay equalizing circuit for controlling a group-delay of the input signal;
- and
- control means for outputting a common control signal to the amplitude equalizing circuit and the group-delay equaling circuit and adjusting an equalizing characteristic of said equalizing means according to a predetermined amplitude equalizing characteristic and a predetermined group-delay equalizing characteristic by controlling the amplitude equalizing circuit and the group-delay equalizing circuit with the common control signal having the same value over the amplitude equalizing circuit and the group-delay equalizing circuit.
Dependencies are inferred from the claim text.