Title:
SIGNAL PROCESSOR AND ITS METHOD
Document Type and Number:
Japanese Patent JP3955488
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To output an analog signal from which an unnecessary out-of-band noise component is suitably removed in accordance with digital data to be reproduced.
SOLUTION: The frequency level of a reproducing signal concerned with inputted digital data is detected by a reproducing frequency judging circuit 502 and a cut-off frequency selection circuit 503 and an analog LPF 105 is switched to a filter of suitable cut-off frequency selected and determined on the basis of the detected result. Thus the unnecessary out-of-band noise component can be suitably removed from a sound analog signal obtained from the digital data by using the filter of the cut-off frequency corresponding to the frequency level of a reproduced signal obtained by reproducing the digital data.
Inventors:
Noriyuki Sekizawa
Application Number:
JP2002077219A
Publication Date:
August 08, 2007
Filing Date:
March 19, 2002
Export Citation:
Assignee:
富士通株式会社
International Classes:
G11B20/10; H03M1/66; G11B20/22; (IPC1-7): H03M1/66; G11B20/10
Domestic Patent References:
| JP5304474A | ||||
| JP2124622A | ||||
| JP1292673A | ||||
| JP1108887A |
Attorney, Agent or Firm:
Takayoshi Kokubun
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