EQUALIZER FOR DIGITAL VIDEO DISK
PROBLEM TO BE SOLVED: To minimize the number of elements and to secure reliability by summing a signal which is a RF input signal multiplied by a factor C before delayed by 2T and a signal multiplied by the factor C and delayed further by 4T, and outputting an RF signal with an equalized frequency c...
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| creator | RI SHOSHU |
| description | PROBLEM TO BE SOLVED: To minimize the number of elements and to secure reliability by summing a signal which is a RF input signal multiplied by a factor C before delayed by 2T and a signal multiplied by the factor C and delayed further by 4T, and outputting an RF signal with an equalized frequency characteristic. SOLUTION: A 2T delay part 14 is comprised of all-pass filter and a 4T delay part is comprised of two all-pass filters connected in series. A signal which is a RF input signal multiplied by a factor C after passing through a 2nd buffer 12, a signal which is the RF signal multiplied by the factor C after it has been delayed by passing through a 1st buffer 11 and a 2T delay part 14, and a signal which is the RF signal multiplied by the factor C after delayed by 4T by passing through a 3rd buffer 13 and 4T delay part 15 are summed by an adder 20, and an RF signal with an equalized frequency characteristic is outputted through a low-pass filter 30. This output has an operation characteristic similar to that of a 5-tap universal filter configuration, and improves a characteristic of the summed signal. |
| format | Patent |
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SOLUTION: A 2T delay part 14 is comprised of all-pass filter and a 4T delay part is comprised of two all-pass filters connected in series. A signal which is a RF input signal multiplied by a factor C after passing through a 2nd buffer 12, a signal which is the RF signal multiplied by the factor C after it has been delayed by passing through a 1st buffer 11 and a 2T delay part 14, and a signal which is the RF signal multiplied by the factor C after delayed by 4T by passing through a 3rd buffer 13 and 4T delay part 15 are summed by an adder 20, and an RF signal with an equalized frequency characteristic is outputted through a low-pass filter 30. This output has an operation characteristic similar to that of a 5-tap universal filter configuration, and improves a characteristic of the summed signal.</description><edition>6</edition><language>eng</language><subject>BASIC ELECTRONIC CIRCUITRY ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS ; INFORMATION STORAGE ; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER ; PHYSICS ; PICTORIAL COMMUNICATION, e.g. TELEVISION ; RESONATORS ; TRANSMISSION</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=19981124&DB=EPODOC&CC=JP&NR=H10312641A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19981124&DB=EPODOC&CC=JP&NR=H10312641A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>RI SHOSHU</creatorcontrib><title>EQUALIZER FOR DIGITAL VIDEO DISK</title><description>PROBLEM TO BE SOLVED: To minimize the number of elements and to secure reliability by summing a signal which is a RF input signal multiplied by a factor C before delayed by 2T and a signal multiplied by the factor C and delayed further by 4T, and outputting an RF signal with an equalized frequency characteristic. SOLUTION: A 2T delay part 14 is comprised of all-pass filter and a 4T delay part is comprised of two all-pass filters connected in series. A signal which is a RF input signal multiplied by a factor C after passing through a 2nd buffer 12, a signal which is the RF signal multiplied by the factor C after it has been delayed by passing through a 1st buffer 11 and a 2T delay part 14, and a signal which is the RF signal multiplied by the factor C after delayed by 4T by passing through a 3rd buffer 13 and 4T delay part 15 are summed by an adder 20, and an RF signal with an equalized frequency characteristic is outputted through a low-pass filter 30. This output has an operation characteristic similar to that of a 5-tap universal filter configuration, and improves a characteristic of the summed signal.</description><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</subject><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>PHYSICS</subject><subject>PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><subject>RESONATORS</subject><subject>TRANSMISSION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1998</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFBwDQx19PGMcg1ScPMPUnDxdPcMcfRRCPN0cfUH8oK9eRhY0xJzilN5oTQ3g6Kba4izh25qQX58anFBYnJqXmpJvFeAh6GBsaGRmYmhozExagDtgyHm</recordid><startdate>19981124</startdate><enddate>19981124</enddate><creator>RI SHOSHU</creator><scope>EVB</scope></search><sort><creationdate>19981124</creationdate><title>EQUALIZER FOR DIGITAL VIDEO DISK</title><author>RI SHOSHU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH10312641A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1998</creationdate><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS</topic><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>PHYSICS</topic><topic>PICTORIAL COMMUNICATION, e.g. TELEVISION</topic><topic>RESONATORS</topic><topic>TRANSMISSION</topic><toplevel>online_resources</toplevel><creatorcontrib>RI SHOSHU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>RI SHOSHU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>EQUALIZER FOR DIGITAL VIDEO DISK</title><date>1998-11-24</date><risdate>1998</risdate><abstract>PROBLEM TO BE SOLVED: To minimize the number of elements and to secure reliability by summing a signal which is a RF input signal multiplied by a factor C before delayed by 2T and a signal multiplied by the factor C and delayed further by 4T, and outputting an RF signal with an equalized frequency characteristic. SOLUTION: A 2T delay part 14 is comprised of all-pass filter and a 4T delay part is comprised of two all-pass filters connected in series. A signal which is a RF input signal multiplied by a factor C after passing through a 2nd buffer 12, a signal which is the RF signal multiplied by the factor C after it has been delayed by passing through a 1st buffer 11 and a 2T delay part 14, and a signal which is the RF signal multiplied by the factor C after delayed by 4T by passing through a 3rd buffer 13 and 4T delay part 15 are summed by an adder 20, and an RF signal with an equalized frequency characteristic is outputted through a low-pass filter 30. This output has an operation characteristic similar to that of a 5-tap universal filter configuration, and improves a characteristic of the summed signal.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION RESONATORS TRANSMISSION |
| title | EQUALIZER FOR DIGITAL VIDEO DISK |
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