Angle detection apparatus and audio reproduction apparatus using it
AssigneeSony Corporation
InventorsKiyofumi Inanaga, Yuji Yamada
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Abstract
According to the present invention, when an audio signal is reproduced through headphones, the same localization, sound field and so on as those obtained when the sound is reproduced by loudspeakers located in a predetermined relationship upon reproduction of the sound by the loudspeakers can be obtained. Particularly, gyration of a head of a listener is detected by using a vibratory gyroscope suitable for detection of the gyration of the head. Even when a vibratory gyroscope (175A), (175B) or (175C) is attached to an attachment position which is a head band (177) of a headphones (170) or a left arm (17L) or a right arm (17R) thereof, it is possible to detect the gyration of the head of the listener.
Claims10
An angle detection apparatus comprising:
- an angular velocity sensor for detecting an angular velocity of a rotary movement of a rotating body;
- an amplifier having a gain switching circuit and for amplifying a detection signal from said angular velocity sensor;
- an analog/digital convertor for converting an output signal from said amplifier into a digital signal;
- and
- arithmetic means for calculating a rotation angle by integrating the digital signal converted by said analog/digital converter and including means for generating a control signal from said digital signal,
- wherein a gain of said amplifier is switched by said gain switching circuit in response to the control signal output from said arithmetic means.
An angle detection apparatus comprising:
- an angular velocity sensor for detecting an angular velocity of a rotary movement of a rotating body.
- a first amplifier for amplifying a detection signal from said angular velocity sensor;
- a first analog/digital convertor for converting an output signal from said first amplifier into a first digital signal;
- a second amplifier having a gain different from a gain of said first amplifier for amplifying said detection signal from said angular velocity sensor;
- a second analog/digital convertor for converting an output signal from said second amplifier into a second digital signal;
- and
- arithmetic means for calculating a rotation angle by integrating one of the first or second digital signals converted respectively by said first or second analog/digital converter, wherein said arithmetic means calculates the rotation angle by selectively using said first digital signal from said first analog/digital converter and said second digital signal from said second analog/digital convertor in response to respective signal levels of the first digital signal from said first analog/digital converter and the second digital signal from said second analog/digital convertor.
Dependencies are inferred from the claim text.