Signal detecting method and apparatus and information reproducing apparatus and method
AssigneesYasuo Cho, Pioneer Corporation
InventorsYasuo Cho, Atsushi Onoe
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Abstract
This signal detection method detects an output signal indicating data information contained at least in two sideband waves from an input signal having a carrier and at least two sideband waves accompanying the carrier. The method includes a cut off step for cutting off a sideband wave positioned at the high frequency side or the low frequency side as compared to the carrier from the at least two sideband waves and a square detection step for outputting an output signal by performing square detection of an input signal having one of the sideband waves which has been cut off.
Claims16
A signal detecting method of detecting an output signal which indicates data information included at least two sideband waves from an input signal having a carrier wave and the at least two sideband waves which accompany the carrier wave,
- said signal detecting method comprising:
- a cutting process of cutting the sideband wave located on one of a high-frequency side and a low-frequency side as compared to the carrier wave, from the at least two sideband waves;
- and
- a squared-detecting process of outputting the output signal by squared-detecting the input signal in which the one of the sideband waves is cut.
A signal detecting apparatus for detecting an output signal which indicates data information included at least two sideband waves from an input signal having a carrier wave and the at least two sideband waves which accompany the carrier wave,
- said signal detecting apparatus comprising:
- a cutting device for cutting the sideband wave located on one of a high-frequency side and a low-frequency side as compared to the carrier wave, from the at least two sideband waves;
- and
- a squared-detecting device for outputting the output signal by squared-detecting the input signal in which the one of the sideband waves is cut.
An information reproducing apparatus for reproducing data information recorded in a recording medium,
- said information reproducing apparatus comprising:
- a reading device for reading a reproduction signal having a carrier wave and at least two sideband waves which accompany the carrier wave and which include the data information, from the recording medium;
- a cutting device for cutting the sideband wave located on one of a high-frequency side and a low-frequency side as compared to the carrier wave, from the at least two sideband waves;
- a squared-detecting device for squared-detecting the reproduction signal in which the one of the sideband waves is cut;
- and
- a reproducing device for extracting and reproducing the data information from the squared-detected reproduction signal.
An information reproducing method of reproducing data information recorded in a recording medium,
- said information reproducing method comprising:
- a reading process of reading a reproduction signal having a carrier wave and at least two sideband waves which accompany the carrier wave and which include the data information, from the recording medium;
- a cutting process of cutting the sideband wave located on one of a high-frequency side and a low-frequency side as compared to the carrier wave, from the at least two sideband waves;
- a squared-detecting process of squared-detecting the reproduction signal in which the one of the sideband waves is cut;
- and
- a reproducing process of extracting and reproducing the data information from the squared-detected reproduction signal.
Dependencies are inferred from the claim text.