Apparatus for compressing data using a Lempel-Ziv-type algorithm
A data processing system having a compression and decompression apparatus based on the Lempel-Ziv algorithm. The compression apparatus includes an array section having a circular history CAM unit for receiving and storing one or more data elements and a coding unit for determining whether received d...
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creator | MASENAS CHARLES J |
description | A data processing system having a compression and decompression apparatus based on the Lempel-Ziv algorithm. The compression apparatus includes an array section having a circular history CAM unit for receiving and storing one or more data elements and a coding unit for determining whether received data elements previously have been stored in the history CAM unit and are a candidate for compression. If a received data element matches at least one of the stored data elements, a PS logic section determines whether there is the presence of a string. An encoding section identifies the address of the matching stored data element in a string and the length of the string. The compression apparatus generates a compression token comprising an identification of whether a data element is compressed, the length of the coded data within a plurality of predetermined data length categories and an address. The compression apparatus uses a particular hardware implementation of the PS logic section. |
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The compression apparatus includes an array section having a circular history CAM unit for receiving and storing one or more data elements and a coding unit for determining whether received data elements previously have been stored in the history CAM unit and are a candidate for compression. If a received data element matches at least one of the stored data elements, a PS logic section determines whether there is the presence of a string. An encoding section identifies the address of the matching stored data element in a string and the length of the string. The compression apparatus generates a compression token comprising an identification of whether a data element is compressed, the length of the coded data within a plurality of predetermined data length categories and an address. The compression apparatus uses a particular hardware implementation of the PS logic section.</description><edition>6</edition><language>eng</language><subject>BASIC ELECTRONIC CIRCUITRY ; CALCULATING ; CODE CONVERSION IN GENERAL ; CODING ; COMPUTING ; COUNTING ; DECODING ; ELECTRICITY ; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ; PHYSICS</subject><creationdate>1998</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19980623&DB=EPODOC&CC=US&NR=5771010A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19980623&DB=EPODOC&CC=US&NR=5771010A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MASENAS; CHARLES J</creatorcontrib><title>Apparatus for compressing data using a Lempel-Ziv-type algorithm</title><description>A data processing system having a compression and decompression apparatus based on the Lempel-Ziv algorithm. The compression apparatus includes an array section having a circular history CAM unit for receiving and storing one or more data elements and a coding unit for determining whether received data elements previously have been stored in the history CAM unit and are a candidate for compression. If a received data element matches at least one of the stored data elements, a PS logic section determines whether there is the presence of a string. An encoding section identifies the address of the matching stored data element in a string and the length of the string. The compression apparatus generates a compression token comprising an identification of whether a data element is compressed, the length of the coded data within a plurality of predetermined data length categories and an address. The compression apparatus uses a particular hardware implementation of the PS logic section.</description><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>CALCULATING</subject><subject>CODE CONVERSION IN GENERAL</subject><subject>CODING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>DECODING</subject><subject>ELECTRICITY</subject><subject>IMAGE DATA PROCESSING OR GENERATION, IN GENERAL</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1998</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHBwLChILEosKS1WSMsvUkjOzy0oSi0uzsxLV0hJLElUKAUzExV8UnMLUnN0ozLLdEsqC1IVEnPS84sySzJyeRhY0xJzilN5oTQ3g7yba4izh25qQX58anFBYnJqXmpJfGiwqbm5oYGhgaMxYRUAEQgwmQ</recordid><startdate>19980623</startdate><enddate>19980623</enddate><creator>MASENAS; CHARLES J</creator><scope>EVB</scope></search><sort><creationdate>19980623</creationdate><title>Apparatus for compressing data using a Lempel-Ziv-type algorithm</title><author>MASENAS; CHARLES J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US5771010A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1998</creationdate><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>CALCULATING</topic><topic>CODE CONVERSION IN GENERAL</topic><topic>CODING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>DECODING</topic><topic>ELECTRICITY</topic><topic>IMAGE DATA PROCESSING OR GENERATION, IN GENERAL</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>MASENAS; CHARLES J</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>MASENAS; CHARLES J</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Apparatus for compressing data using a Lempel-Ziv-type algorithm</title><date>1998-06-23</date><risdate>1998</risdate><abstract>A data processing system having a compression and decompression apparatus based on the Lempel-Ziv algorithm. The compression apparatus includes an array section having a circular history CAM unit for receiving and storing one or more data elements and a coding unit for determining whether received data elements previously have been stored in the history CAM unit and are a candidate for compression. If a received data element matches at least one of the stored data elements, a PS logic section determines whether there is the presence of a string. An encoding section identifies the address of the matching stored data element in a string and the length of the string. The compression apparatus generates a compression token comprising an identification of whether a data element is compressed, the length of the coded data within a plurality of predetermined data length categories and an address. The compression apparatus uses a particular hardware implementation of the PS logic section.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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subjects | BASIC ELECTRONIC CIRCUITRY CALCULATING CODE CONVERSION IN GENERAL CODING COMPUTING COUNTING DECODING ELECTRICITY IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PHYSICS |
title | Apparatus for compressing data using a Lempel-Ziv-type algorithm |
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