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:
Jan. 07, 1986
Filed:
May. 18, 1983
Tong L Lim, Middletown, NJ (US);
Arun N Netravali, Westfield, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
In a transmitter for image signals, a variable-length coder whose code set has been optimized for the order statistics of a run-length-coded bilevel image is used to code a stream of differential-pulse-code-modulated (DPCM) errors representing a multi-level image. The DPCM errors are first rearranged on a line-by-line basis in such a way that the rearranged error stream contains many long runs. Individual words in the rearranged error stream are then changed in such a way that, for at least one value of n, the n most-frequently-occurring words in the resulting, processed signal substantially have the aforementioned order statistics. The resulting signal is then run-length-coded, applied to the variable-length coder, and then transmitted. The reverse processing is performed at the receiver.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile