Patent · US Expired

Dictionary-based compression and decompression

US7280057B2 · kind B2 · utility

5Cited by

3References

19Claims

0Family size

Assignee

Nokia · FI

Inventors

Christoph Delfs · Bretten, DE
Denis Nazaradeh · Bottrop, DE
Andreas Wannenwetsch · Düsseldorf, DE

Key dates

Filing date	Sep 19, 2005
Grant date	Oct 9, 2007
Priority date	—
Expiry date	Sep 19, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH03M7/40
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

The invention discloses a compressor for encoding data and a decompressor for decoding data. The data compressor comprises an encoder configured to encode a data file using a dictionary-based compression. The encoder is configured to reset the dictionary at least once while encoding the data file, thereby forming a plurality of encoded data blocks. The invention discloses also a data decompressor comprising a decoder configured to decode a data file compressed using a dictionary-based compression. The decoder is configured to recognize at least one block boundary within the data file and to restart decoding at the block boundary.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.