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Parstream Gmbh patents

Recent patent applications related to Parstream Gmbh. Parstream Gmbh is listed as an Agent/Assignee. Note: Parstream Gmbh may have other listings under different names/spellings. We're not affiliated with Parstream Gmbh, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "P" | Parstream Gmbh-related inventors

Method and database computer system for performing a database query using a bitmap index

Method and apparatus for performing a database query using a bitmap index in a data-base having a plurality of bitmap vectors, the method comprising the steps of: upon receipt of a query containing a selection condition, creating a filter bitmap based on the query input; performing a bitmap scan for the filter bitmap in order to determine at least one value of an existing matching data-base entry; determining a bitmap of the determined at least one value; creating a filtered bitmap by combining the filter bitmap with the bitmap of the determined at least one value; determining all entries in the database matching the filtered bitmap; sub-tracting the filtered bitmap from the filter bitmap, thus creating a new filter bitmap; repeating the steps, starting with the step of performing a bitmap scan based on the new filter bitmap, until the step of sub-tracting results in an empty bitmap.. . ... Parstream Gmbh

Method and apparatus for adaptive data compression

Adaptively compressing an input string (10) comprising a sequence of symbols in order to create a plurality of segment dictionaries dm, with the steps of: generating a lookup map (110); generating a key value segment sm,n; searching the lookup map for each symbol received in the input string (120, 130); upon detecting a symbol is not stored in the lookup map, adding the symbol by storing the symbol at a next sequential key index in the lookup map lookup map (135) and assigning a next sequential key value entry to the symbol and adding this key value to the key value segment sm,n (150); upon detecting the symbol is stored in the lookup map, adding the corresponding key value assigned to this symbol to the next sequential entry of the key value segment sm,n (150); wherein a new key value segment sm,n+1 of the lookup map is generated if the number of different symbols equals the number of available key values k=2n for the opened/current key value segment sm,n (141, 142), and where-in the lookup map is converted into a segment dictionary dm if the maximal key value size knmax=2nmax is reached (132, 133, 134), with n being any positive integral number 1 to nmax, nmax denoting the maximal bit size, and m being any positive integral number denoting the consecutive numbering of segment dictionaries dm.. . ... Parstream Gmbh

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