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:
Oct. 13, 1987
Filed:
Dec. 01, 1986
George F Leslie, Jr, San Francisco, CA (US);
Kent W MacKay, San Bruno, CA (US);
The Variable Speech Control Company ('VSC'), Burlingame, CA (US);
Abstract
Digital processing of speech signals for compression/expansion pitch change is provided by writing and reading a ROM at different rates and controlling the discard/repeat segments of memory to be integral multiples of the pitch period. The rear pointer jumps a portion of the memory to either skip a portion (in compression) or retrace a portion (in expansion) of the recorded information. The read pointer jumps so as to avoid crossing the write pointer (thereby avoiding reading old recorded information). The jump occurs when a predetermined spacing or condition is reached between read and write pointers.