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:
Aug. 20, 1985
Filed:
Aug. 16, 1983
Applicant:
Inventor:
Hans-Joachim Grallert, Groebenzell, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H03K / ;
U.S. Cl.
CPC ...
375 30 ; 332 / ;
Abstract
In an improved digital DPCM-coder having a high calculating speed, a second quantizer is provided which is supplied with a DPCM-signal determined in a calculating loop, and which emits from its output a quantized DPCM-signal multiplied by a prediction factor. With the improved coder, one calculating operation less is required, and the coder can process a higher PCM-data rate at a constant calculating speed of the components.