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:
Jan. 20, 1998
Filed:
Jan. 05, 1993
Yasunao Abe, Hamamatsu, JP;
Yamaha Corporation, , JP;
Abstract
In such an application where one memory stores both tone forming data and operation controlling data and the memory is selectively accessed from separate devices utilizing the respective data, a control section utilizing the operation controlling data normally has access to the memory. When it is desired to read out the tone forming data from the memory, a utilization-request signal is generated from a tone source section. When the utilization-request signal is generated, the tone source section is allowed to access the memory only for a time necessary to read out the tone forming data. Accordingly, the memory accessing times for the control section and tone source section are not fixed and thus access to the memory can be made in a flexible manner. Particularly, access to the memory by the control section (having a computer, for instance) utilizing the operation control data can be done with a highly enhanced efficiency, and thus, as a whole, efficient memory access without waste can be achieved.