Digital audio signal playback apparatus with scratch effect...

Details Digital audio signal playback apparatus with scratch effect... Digital audio signal playback apparatus with scratch effect...

2006-07-04

2006-07-04

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

Combined independent audio systems

C369S004000, C084S605000

Reexamination Certificate

active

07072249

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.

REFERENCES:
patent: 5569912 (1996-10-01), Turk et al.
patent: 5763874 (1998-06-01), Luciano et al.
patent: 6535462 (2003-03-01), Liu
patent: 6541690 (2003-04-01), Segers, Jr.
patent: 6898165 (2005-05-01), Kikuchi
patent: 2003/0029305 (2003-02-01), Kent et al.

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