The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1999
Filed:
Sep. 25, 1997
Keizyu Anada, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A karaoke apparatus is configured so that, even when a music piece data having no harmony data is to be performed, a harmony voice signal can be generated. Notes of a length not smaller than a quarter note are extracted from a karaoke performance data and a guide melody data of a music piece data. The distributions of frequencies of occurrence of the tones (C to B) are aggregated. The distributions are compared with the major judgment scale and the minor judgment scale. Then, the data is judged to have a key in which the tonic note (scale note) exists at a place where the highest coincidence is attained. A harmony data is generated on the basis of the result of the key judgment and the guide melody data, and a harmony voice signal is produced based on the harmony data.