Digital audio signal playback apparatus with scratch effect control device
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United States of America Patent
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Jul 4, 2006
Grant Date -
Nov 18, 2004
app pub date -
Jul 12, 2003
filing date -
May 14, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a scratch effect control device for a digital audio signal playback apparatus, a control unit controls output of digital audio data recorded in a data recording medium and read by a data reading device in accordance with a first control signal representative of angular velocity and rotational direction of a first encoder disc and obtained from a first pick-up device, and a second control signal representative of angular velocity and rotational direction of a second encoder disc and obtained from a second pick-up device. The first encoder disc is mounted co-rotatably on an outer sleeve sleeved rotatably on an inner spindle and coupled co-axially to a lower platter member that is driven by a driving unit to rotate about an axis. The second encoder disc is mounted co-rotatably on the inner spindle which is coupled co-axially to an upper platter member that is superposed on the lower platter member.
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