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. 24, 1995
Filed:
Dec. 02, 1993
Dennis N Grinberg, Pittsburgh, PA (US);
Sivaramakrishnan Rajagopalan, Brookline, MA (US);
Ramarathnam Venkatesan, Morristown, NJ (US);
Victor K-W. Wei, Warren, NJ (US);
Bell Communications Research, Inc., Livingston, NJ (US);
Abstract
Methodology and concomitant circuitry for compacting an incoming data stream into an outgoing compacted data stream utilize a plurality of memories or lists. The incoming data stream is partitioned into a sequence of tokens. A primary memory stores each token, with the most recently appearing token occupying the top rank in the list. A secondary memory stores the location in the primary memory of each of a subset of tokens. The compacted data stream is generated as a coded representation of the token itself, the position of the token in the primary memory, or the position in secondary memory of the location of the token in primary memory. A tertiary list may also be employed to generate a coded representation of the position in the tertiary list of the secondary list. Searching of the lists is effected with a hashing function. Updating of the lists utilizes tree splaying.