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:
Jul. 19, 1988
Filed:
Nov. 22, 1985
Applicant:
Inventors:
Susumu Takahashi, Tokyo, JP;
Susumu Tanaka, Hachioji, JP;
Assignee:
Sansui Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375 27 ; 375 26 ; 375 38 ; 329104 ; 332 / ; 358135 ;
Abstract
A PCM difference data is obtained from an original data, and an absolute data having a lower bit number than the original data is obtained at every data block, each data block comprising a plurality of the difference data. The transmission data includes the difference data and absolute data which is transmitted. The received data is separated into the difference data and the absolute data and the received difference data is integrated to provide the demodulated data. The integrated data is refreshed by the received absolute data only when the difference between the integrated data and absolute data is more than a predetermined value.