Karaoke sound processor for automatically adjusting the pitch of the accompaniment signal
Patent 5477003 Issued on December 19, 1995. Estimated Expiration Date: 
June 17, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 17, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesEntertainment and creative expression device for easily playing along to background music Musical accompaniment playing apparatus Vocal display device Musical accompaniment playing apparatus having phoneme memory for chorus voices Karaoke music selection device Automatic musical key adjustment system for karaoke equipment Patent #: 5296643 InventorsAssigneeApplicationNo. 078961 filed on 06/17/1993US Classes:434/307A, Karaoke84/616, Fundamental tone detection or extraction84/619, Transposition84/634, Accompaniment84/654, Fundamental tone detection or extraction84/657TranspositionExaminersPrimary: Shoop, William M. Jr.Assistant: Donels, Jeffrey Attorney, Agent or FirmForeign Patent References
International ClassesG09B 015/04G10H 001/36 AbstractA karaoke sound processor that automatically adjusts to the pitch of the singer's voice is provided. The pitch of the song signal recorded in the accompaniment recording medium for karaoke is detected by a first pitch detecting facility. The pitch of the song signal of the singer entered from the microphone is detected by a second pitch detecting facility. The two song signal pitches are compared in a comparing facility. When the pitches of the two signals are different, the output signal of the accompaniment is automatically changed by a pitch changing facility. The output signal of the pitch changing means and the signal of the microphone are summed up by an adder and produced. Without requring the singer to set the pitch change value, a karaoke sound processor capable of correcting the pitch automatically to a register comfortable for the singer is provided.Other References
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