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:
Apr. 15, 1997
Filed:
Feb. 07, 1994
Toshio Moriya, Yokohama, JP;
Kunihiro Yanagi, Sagamihara, JP;
Motoaki Satoyama, Sagamihara, JP;
Yoshihiro Mizuno, Daito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
During expansion of differential pulse code modulation PCM data into (PCM) data, particularly for speech data in data processing, the range of oscillation of the PCM data can be centered about an amplitude level when each current PCM value has a small value .DELTA. subtracted from it or added to it when respectively positive or negative to obtain a corrected current PCM sample value. Even if manipulation involved in data editing, such as division or connection, of differential or expanded PCM data has been performed or if an error has occurred during transmission of differential PCM data to produce an offset, such offset can be quickly corrected during the expansion.