Apparatus for implementing inverse discrete cosine transform in digital image processing system
An apparatus for a fast inverse discrete cosine transform (IDCT) by processing only non-zero IDCT input data including non-zero feeding unit connected to each row-column decomposed one dimensional IDCT input for feeding only non-zero input data during each cycle. The first 1-D IDCT and the second 1-...
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| creator | MIN SEUNG JAI BAE SEONG OK |
| description | An apparatus for a fast inverse discrete cosine transform (IDCT) by processing only non-zero IDCT input data including non-zero feeding unit connected to each row-column decomposed one dimensional IDCT input for feeding only non-zero input data during each cycle. The first 1-D IDCT and the second 1-D IDCT have the same structure, and 1-D IDCT core with a non-zero feeding unit at its front end. The 1-D IDCT core of the present invention is for performing IDCT operation based on the input scaling method, and the operation of the IDCT core consists of a cosine kernel selection operation using a received non-zero input, multiplication-and-addition, and a storing operation. The non-zero feeding unit for the first 1-D IDCT and the second one are different in their configuration. There are two different methods for implementing the first 1-D IDCT, a stored input feeding method and a zigzag scanned input feeding method. The zigzag scanned input method enables the first 1-D IDCT to get rid of its input memory for storing the IDCT input data. |
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The first 1-D IDCT and the second 1-D IDCT have the same structure, and 1-D IDCT core with a non-zero feeding unit at its front end. The 1-D IDCT core of the present invention is for performing IDCT operation based on the input scaling method, and the operation of the IDCT core consists of a cosine kernel selection operation using a received non-zero input, multiplication-and-addition, and a storing operation. The non-zero feeding unit for the first 1-D IDCT and the second one are different in their configuration. There are two different methods for implementing the first 1-D IDCT, a stored input feeding method and a zigzag scanned input feeding method. The zigzag scanned input method enables the first 1-D IDCT to get rid of its input memory for storing the IDCT input data.</description><edition>7</edition><language>eng</language><subject>CALCULATING ; COMPUTING ; COUNTING ; ELECTRIC DIGITAL DATA PROCESSING ; PHYSICS</subject><creationdate>2002</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=20020716&DB=EPODOC&CC=US&NR=6421695B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25544,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020716&DB=EPODOC&CC=US&NR=6421695B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MIN SEUNG JAI</creatorcontrib><creatorcontrib>BAE SEONG OK</creatorcontrib><title>Apparatus for implementing inverse discrete cosine transform in digital image processing system</title><description>An apparatus for a fast inverse discrete cosine transform (IDCT) by processing only non-zero IDCT input data including non-zero feeding unit connected to each row-column decomposed one dimensional IDCT input for feeding only non-zero input data during each cycle. The first 1-D IDCT and the second 1-D IDCT have the same structure, and 1-D IDCT core with a non-zero feeding unit at its front end. The 1-D IDCT core of the present invention is for performing IDCT operation based on the input scaling method, and the operation of the IDCT core consists of a cosine kernel selection operation using a received non-zero input, multiplication-and-addition, and a storing operation. The non-zero feeding unit for the first 1-D IDCT and the second one are different in their configuration. There are two different methods for implementing the first 1-D IDCT, a stored input feeding method and a zigzag scanned input feeding method. The zigzag scanned input method enables the first 1-D IDCT to get rid of its input memory for storing the IDCT input data.</description><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC DIGITAL DATA PROCESSING</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2002</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNyzsKAkEQhOFJDES9Q1_AYH0sGKoo5mo8NGPtMjAvplvB2zuCBzCqoL5_auy-FK6sT6EhV_KxBEQk9Wkkn16oAnp4cRUKcll8AmnlJE3HJto5euXQSh5BpWYHkW8tb1HEuZkMHASL384MnU-342WJki2ksEOC2vu136y6frc9dOs_yAeUHj2_</recordid><startdate>20020716</startdate><enddate>20020716</enddate><creator>MIN SEUNG JAI</creator><creator>BAE SEONG OK</creator><scope>EVB</scope></search><sort><creationdate>20020716</creationdate><title>Apparatus for implementing inverse discrete cosine transform in digital image processing system</title><author>MIN SEUNG JAI ; BAE SEONG OK</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US6421695B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2002</creationdate><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC DIGITAL DATA PROCESSING</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>MIN SEUNG JAI</creatorcontrib><creatorcontrib>BAE SEONG OK</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>MIN SEUNG JAI</au><au>BAE SEONG OK</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Apparatus for implementing inverse discrete cosine transform in digital image processing system</title><date>2002-07-16</date><risdate>2002</risdate><abstract>An apparatus for a fast inverse discrete cosine transform (IDCT) by processing only non-zero IDCT input data including non-zero feeding unit connected to each row-column decomposed one dimensional IDCT input for feeding only non-zero input data during each cycle. The first 1-D IDCT and the second 1-D IDCT have the same structure, and 1-D IDCT core with a non-zero feeding unit at its front end. The 1-D IDCT core of the present invention is for performing IDCT operation based on the input scaling method, and the operation of the IDCT core consists of a cosine kernel selection operation using a received non-zero input, multiplication-and-addition, and a storing operation. The non-zero feeding unit for the first 1-D IDCT and the second one are different in their configuration. There are two different methods for implementing the first 1-D IDCT, a stored input feeding method and a zigzag scanned input feeding method. The zigzag scanned input method enables the first 1-D IDCT to get rid of its input memory for storing the IDCT input data.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
| title | Apparatus for implementing inverse discrete cosine transform in digital image processing system |
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