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:
Mar. 15, 1977
Filed:
Jun. 12, 1974
Chuichi Ota, Tokyo, JA;
Abstract
A system for transmitting a coded voice signal representative of an original analogue voice signal, for improved performance in time assignment multiplex systems. A voice signal detector detects when the magnitude of the coded voice signal exceeds a certain predetermined value which corresponds to the presence of an original voice signal. A waveform analyzer estimates high frequency components of the original voice signal and the detected coded voice signal is transmitted at intervals determined by the measured values of the high frequency components. The transmitted coded voice signal is comprised of digital code units, and the number of bits in each code unit are reduced at low transmission speed by distributing the bits of the code units between more than one transmission interval.