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:
Sep. 26, 1989
Filed:
Oct. 22, 1987
Ricoh Company, Ltd., , JP;
Abstract
A voice signal coding method for compressing voice data by coding is provided. PCM coded voice data are grouped into blocks in a timed sequence, each block having a predetermined number of data. A scale data representing a MSB corresponding to a maximum value in absolute value in each block is identified. Then, a code data is defined by a predetermined number of bits of data containing the MSB, thereby having the voice data compressed by coding. The code data is corrected such that an error between a decoded value of the code data and the original voice data corresponding to the code data is minimized. With such a correction step, the code data is refined such that a reproduced voice signal by decoding the thus corrected code data is very close to the original voice signal.