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. 26, 1977
Filed:
May. 07, 1975
Applicant:
Inventor:
Peter H Halpern, Longwood, FL (US);
Assignee:
General Dynamics Corporation, St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
178 68 ; 325 / ; 360 40 ; 3403 / ;
Abstract
A data processing system applicable for high density magnetic recording and data transmission wherein digital data is translated into multi-level zero average words which occupy a greater number of time slots than the bits of the digital data which they represent, the words having increased power density in the signal spectra thereof which represent the difference between different words. After recording or transmission the signals are detected and decoded in accordance with the amplitude characteristics of samples of the detected signals occurring during time slots which are occupied by samples, the sum of which is equal to zero.