Inventor · disambiguated record
Yasuji Ota
Also filed as: OTA YASUJI
45 granted patents·16 pending applications·498 citations·filing 1990–2014
98Inventor score
Top patents by PatentIndex Score
61 records- 0190US7222069B2Voice code conversion apparatusFUJITSU LTD·Filed 2005·Granted May 22, 2007·42 cites·14 claims
- 0289US7016831B2Voice code conversion apparatusFUJITSU LTD·Filed 2001·Granted Mar 21, 2006·65 cites·6 claims
- 0388US7152032B2Voice enhancement device by separate vocal tract emphasis and source emphasisFUJITSU LTD·Filed 2005·Granted Dec 19, 2006·23 cites·19 claims
- 0484US6490554B2Speech detecting device and speech detecting methodFUJITSU LTD·Filed 2002·Granted Dec 3, 2002·45 cites·33 claims
- 0583US6594626B2Voice encoding and voice decoding using an adaptive codebook and an algebraic codebookFUJITSU LTD·Filed 2002·Granted Jul 15, 2003·41 cites·15 claims
- 0680US8676571B2Audio signal processing system and audio signal processing methodOTANI TAKESHI·Filed 2011·Granted Mar 18, 2014·6 cites·10 claims
- 0779US7092875B2Speech transcoding method and apparatus for silence compressionFUJITSU LTD·Filed 2002·Granted Aug 15, 2006·31 cites·15 claims
- 0875US8340973B2Data embedding device and data extraction deviceTSUCHINAGA YOSHITERU·Filed 2011·Granted Dec 25, 2012·6 cites·6 claims
- 0975US7310596B2Method and system for embedding and extracting data from encoded voice codeFUJITSU LTD·Filed 2003·Granted Dec 18, 2007·23 cites·41 claims
- 1073US7650280B2Voice packet loss concealment device, voice packet loss concealment method, receiving terminal, and voice communication systemFUJITSU LTD·Filed 2005·Granted Jan 19, 2010·4 cites·18 claims
- 1172US7664650B2Speech speed converting device and speech speed converting methodFUJITSU LTD·Filed 2005·Granted Feb 16, 2010·7 cites·8 claims
- 1271US7590532B2Voice code conversion method and apparatusFUJITSU LTD·Filed 2002·Granted Sep 15, 2009·19 cites·1 claims
- 1371US6470312B1Speech coding apparatus, speech processing apparatus, and speech processing methodFUJITSU LTD·Filed 2001·Granted Oct 22, 2002·19 cites·21 claims
- 1470US8774397B2Telephone and voice adjustment method for telephoneFUJITSU LTD·Filed 2012·Granted Jul 8, 2014·2 cites·20 claims
- 1570US8392199B2Clipping detection device and methodOTANI TAKESHI·Filed 2009·Granted Mar 5, 2013·6 cites·12 claims
- 1670US8280727B2Voice band expansion device, voice band expansion method, and communication apparatusENDO KAORI·Filed 2010·Granted Oct 2, 2012·5 cites·18 claims
- 1770US8243941B2Active noise reduction system and active noise reduction methodTOGAWA TARO·Filed 2009·Granted Aug 14, 2012·5 cites·18 claims
- 1869US7454345B2Word or collocation emphasizing voice synthesizerFUJITSU LTD·Filed 2005·Granted Nov 18, 2008·6 cites·13 claims
- 1968US8265231B2Method for identifying a device transmitting an echo signal, echo source identifying method for identifying echo source, measuring apparatus for identifying a source of an echo, and echo source identifying apparatusOTANI TAKESHI·Filed 2009·Granted Sep 11, 2012·3 cites·20 claims
- 2066US7787500B2Packet receiving method and deviceFUJITSU LTD·Filed 2004·Granted Aug 31, 2010·10 cites·17 claims
- 2165US5138662ASpeech coding apparatusFUJITSU LTD·Filed 1990·Granted Aug 11, 1992·48 cites·13 claims
- 2263US8005219B2Data decryption apparatus and data encryption apparatusFUJITSU LTD·Filed 2007·Granted Aug 23, 2011·2 cites·18 claims
- 2363US7783481B2Noise reduction apparatus and noise reducing methodFUJITSU LTD·Filed 2004·Granted Aug 24, 2010·12 cites·14 claims
- 2462US8488473B2Voice communication quality assessing systemOTA YASUJI·Filed 2010·Granted Jul 16, 2013·2 cites·11 claims
- 2560US8560308B2Speech sound enhancement device utilizing ratio of the ambient to background noiseENDO KAORI·Filed 2009·Granted Oct 15, 2013·3 cites·14 claims
- 2658US6078881ASpeech encoding and decoding method and speech encoding and decoding apparatusFUJITSU LTD·Filed 1998·Granted Jun 20, 2000·37 cites·8 claims
- 2757US7974846B2Data embedding device and data extraction deviceFUJITSU LTD·Filed 2004·Granted Jul 5, 2011·5 cites·6 claims
- 2856US8364475B2Voice processing apparatus and voice processing method for changing accoustic feature quantity of received voice signalFUJITSU LTD·Filed 2009·Granted Jan 29, 2013·1 cites·15 claims
- 2956US7072830B2Audio coderFUJITSU LTD·Filed 2005·Granted Jul 4, 2006·1 cites·5 claims
- 3053US2010142727A1Sound processing methods and apparatusFUJITSU LTD·Filed 2009·Application pending·0 cites
- 3151US9247076B2Portable terminal device and method of controlling portable terminal deviceFUJITSU LTD·Filed 2013·Granted Jan 26, 2016·0 cites·11 claims
- 3251US2009234241A1Recording medium, device, and method for sleep apnea detectionFUJITSU LTD·Filed 2009·Application pending·0 cites
- 3350US8558691B2Sensing apparatus, sensor information gathering apparatus, sensing method, and remote sensing methodOTA YASUJI·Filed 2009·Granted Oct 15, 2013·0 cites·15 claims
- 3450US8155333B2Active noise control apparatusTOGAWA TARO·Filed 2009·Granted Apr 10, 2012·0 cites·10 claims
- 3548US8208623B2Echo processing method and deviceOTANI TAKESHI·Filed 2007·Granted Jun 26, 2012·0 cites·20 claims
- 3648US2010017201A1Data embedding apparatus, data extraction apparatus, and voice communication systemFUJITSU LTD·Filed 2009·Application pending·0 cites
- 3747US7925500B2Pitch conversion method and device for converting a pitch of an input signal into a desired pitchFUJITSU LTD·Filed 2007·Granted Apr 12, 2011·0 cites·16 claims
- 3847US2005108004A1Voice activity detector based on spectral flatness of input signalFiled 2004·Application pending·0 cites
- 3946US8526578B2Voice communication apparatusOTANI TAKESHI·Filed 2012·Granted Sep 3, 2013·0 cites·6 claims
- 4046US8438035B2Concealment signal generator, concealment signal generation method, and computer productENDO KAORI·Filed 2007·Granted May 7, 2013·0 cites·10 claims
- 4145US8751221B2Communication apparatus for adjusting a voice signalENDO KAORI·Filed 2009·Granted Jun 10, 2014·0 cites·10 claims
- 4245US5274741ASpeech coding apparatus for separately processing divided signal vectorsFUJITSU LTD·Filed 1990·Granted Dec 28, 1993·19 cites·7 claims
- 4345US2013178756A1Breath detection device and breath detection methodFUJITSU LTD·Filed 2013·Application pending·0 cites
- 4445US2004068404A1Speech transcoder and speech encoderFiled 2003·Application pending·0 cites
- 4544US2013006150A1Bruxism detection device and bruxism detection methodFUJITSU LTD·Filed 2012·Application pending·0 cites
- 4644US2003158730A1Method and apparatus for embedding data in and extracting data from voice codeFiled 2002·Application pending·0 cites
- 4743US2007265840A1Signal processing method and deviceMATSUBARA MITSUYOSHI·Filed 2007·Application pending·0 cites
- 4843US2007232257A1Noise suppressorOTANI TAKESHI·Filed 2007·Application pending·0 cites
- 4942US9307950B2Sleep apnea syndrome testing apparatus, test method for sleep apnea syndrome and tangible recording medium recording programTANAKA MASAKIYO·Filed 2012·Granted Apr 12, 2016·0 cites·9 claims
- 5042US8457955B2Voice reproduction with playback time delay and speed based on background noise and speech characteristicsTOGAWA TARO·Filed 2012·Granted Jun 4, 2013·0 cites·12 claims
Showing the top 50 of 61 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →