Patents by Inventor Yoshihide Iwata
Yoshihide Iwata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240086439Abstract: A medium storing comprising instructions for: dividing a text into words; specifying an unknown word indicating a word other than a static word in a static dictionary among words in the text based on the static dictionary associating the static word with a vector; determining whether a unique word corresponding to the unknown word is included in a definition, using the definition defining a relationship between the unique word and a vector generated based on a condition that similar vectors are set for similar unique words; and when the unique word corresponding to the unknown word is included in the definition, assigning a vector corresponding to the unique word to the unknown word; and when the unique word corresponding to the unknown word is not included in the definition, assigning a vector to the unknown word using words arranged before and after the unknown word.Type: ApplicationFiled: November 21, 2023Publication date: March 14, 2024Applicant: FUJITSU LIMITEDInventors: Masahiro KATAOKA, Yoshihide TOMIYAMA, Aya IWATA
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Patent number: 8155972Abstract: This invention involves time-scale modification of audio signals. The invention describes overlap and add time scale modification with variable input and output buffer sizes. Seamless speed change is achieved by keeping track of previously processed data to avoid discontinuities during playback speed transitions.Type: GrantFiled: October 5, 2005Date of Patent: April 10, 2012Assignee: Texas Instruments IncorporatedInventors: Atsuhiro Sakurai, Yoshihide Iwata
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Patent number: 8050934Abstract: This invention locally controls the pitch of speech and audio signals. The invention is based on a seamless time scale modification (S-TSM) scheme connected to a synchronized sampling rate converter that switches between different time scale factors in a seamless manner and controls pitch during playback in a nearly continuous way.Type: GrantFiled: November 29, 2007Date of Patent: November 1, 2011Assignee: Texas Instruments IncorporatedInventors: Atsuhiro Sakurai, Yoshihide Iwata, Steven D. Trautmann
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Patent number: 8019086Abstract: A method for creating a stereophonic sound image out of a monaural signal combines two sub-methods. Comb filters decorrelate the left and right channel signals. Intra-aural difference cues, such as an Intra-Aural Time Difference (ITD) and an Intra-aural Intensity Difference (IID) separated channels. Strict complementary (SC) linear phase FIR filters divide the incoming monaural signal into three frequency band separation. The comb filters and ITD/IID applied to the low and high frequency bands create a simulated stereo sound image for the instruments other than human voice. Listening tests indicate that this invention provides a wider stereo sound image than previous methods, while retaining human voice centralization. Since the comb filter solution and ITD/IID solution can share the same filter bank, the computational cost of this method is almost the same as the previous method.Type: GrantFiled: November 16, 2006Date of Patent: September 13, 2011Assignee: Texas Instruments IncorporatedInventors: Ryo Tsutsui, Yoshihide Iwata, Steven D. Trautmann
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Patent number: 7974418Abstract: Audio loudspeaker and headphone virtualizers and cross-talk cancellers and methods use separate virtual speaker locations for different Bark frequency bands and a single reverberation filter for multi-channel virtualizer inputs.Type: GrantFiled: February 28, 2006Date of Patent: July 5, 2011Assignee: Texas Instruments IncorporatedInventors: Atsuhiro Sakurai, Steven D. Trautmann, Hironori Kakemizu, Yoshihide Iwata
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Patent number: 7885414Abstract: A new method is proposed that produces stereophonic sound image out of monaural signal within a selected frequency regions. The system employs a strictly complementary (SC) linear phase FIR filter pair that separates input signal into different frequency regions. A pair of comb filters is applied to one of the filter's output. This implementation allows a certain frequency range to be relatively localized at center while the other sounds are perceived in a wider space.Type: GrantFiled: November 16, 2006Date of Patent: February 8, 2011Assignee: Texas Instruments IncorporatedInventors: Ryo Tsutsui, Yoshihide Iwata, Steven D. Trautmann
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Patent number: 7676043Abstract: Bandwidth expansion for audio signals by frequency band translations plus adaptive gains to create higher frequencies; use of a common channel for both stereo channels limits computational complexity. Adaptive cut-off frequency determination by power spectrum curve analysis, and bass expansion by both fundamental frequency illusion and equalization.Type: GrantFiled: February 28, 2006Date of Patent: March 9, 2010Assignee: Texas Instruments IncorporatedInventors: Ryo Tsutsui, Ivan Setiawan, Yoshihide Iwata
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Patent number: 7580761Abstract: A time-domain time-scale modification method based on the synchronous overlap-and-add method consists of a generalization of the envelope-matching time-scale modification method. The cross-correlation function employs a fixed-size cross-correlation buffer to eliminate the need for normalization inside the search loop. This fixed-size cross-correlation buffer is the center of the overlap region corresponding to the case where the fine overlap adjustment value is set to zero. The computational cost of this invention is lower than any other method with a comparable quality.Type: GrantFiled: November 14, 2003Date of Patent: August 25, 2009Assignee: Texas Instruments IncorporatedInventors: Atsuhiro Sakurai, Yoshihide Iwata
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Publication number: 20090144064Abstract: This invention locally controls the pitch of speech and audio signals. The invention is based on a seamless time scale modification (S-TSM) scheme connected to a synchronized sampling rate converter that switches between different time scale factors in a seamless manner and controls pitch during playback in a nearly continuous way.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Inventors: Atsuhiro Sakurai, Yoshihide Iwata, Steven D. Trautmann
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Publication number: 20080118072Abstract: A method for creating a stereophonic sound image out of a monaural signal combines two sub-methods. Comb filters decorrelate the left and right channel signals. Intra-aural difference cues, such as an Intra-Aural Time Difference (ITD) and an Intra-aural Intensity Difference (IID) separated channels. Strict complementary (SC) linear phase FIR filters divide the incoming monaural signal into three frequency band separation. The comb filters and ITD/IID applied to the low and high frequency bands create a simulated stereo sound image for the instruments other than human voice. Listening tests indicate that this invention provides a wider stereo sound image than previous methods, while retaining human voice centralization. Since the comb filter solution and ITD/IID solution can share the same filter bank, the computational cost of this method is almost the same as the previous method.Type: ApplicationFiled: November 16, 2006Publication date: May 22, 2008Inventors: Ryo Tsutsui, Yoshihide Iwata, Steven D. Trautmann
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Publication number: 20080118073Abstract: A new method is proposed that produces stereophonic sound image out of monaural signal within a selected frequency regions. The system employs a strictly complementary (SC) linear phase FIR filter pair that separates input signal into different frequency regions. A pair of comb filters is applied to one of the filter's output. This implementation allows a certain frequency range to be relatively localized at center while the other sounds are perceived in a wider space.Type: ApplicationFiled: November 16, 2006Publication date: May 22, 2008Inventors: Ryo Tsutsui, Yoshihide Iwata, Steven D. Trautmann
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Patent number: 7328076Abstract: A time-domain time-scale modification method based on the synchronous overlap-and-add method consists of a generalization of the envelope-matching time-scale modification method. The cross-correlation function employs n most significant bits rather than merely the sign bit of the prior envelope matching method. This provides higher accuracy for n>1. A fixed-size cross-correlation buffer is employed to eliminate the need for normalization inside the search loop. This invention makes full use of fast/parallel shift and multiply-and-accumulate (MAC) instructions of current digital signal processors to become at the same time faster and more precise than envelope-matching time-domain time-scale modification.Type: GrantFiled: November 14, 2003Date of Patent: February 5, 2008Assignee: Texas Instruments IncorporatedInventors: Atsuhiro Sakurai, Yoshihide Iwata
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Publication number: 20070078662Abstract: This invention involves time-scale modification of audio signals. The invention describes overlap and add time scale modification with variable input and output buffer sizes. Seamless speed change is achieved by keeping track of previously processed data to avoid discontinuities during playback speed transitions.Type: ApplicationFiled: October 5, 2005Publication date: April 5, 2007Inventors: Atsuhiro Sakurai, Yoshihide Iwata
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Publication number: 20050137729Abstract: An efficient time scale modification (TSM) scheme for stereo signals is proposed where the overlap point is calculated just once per stereo frame based on a downmixed signal. The proposed scheme results in significantly lower computational cost compared with conventional methods: about 1.2 to 1.3 times the amount of computation required by monoaural signals, against 2.0 times the amount of computation required by channel-independent methods. Listening tests indicate that the quality achieved is higher than conventional channel-independent approaches due to the preservation of the spatial localization of the sound.Type: ApplicationFiled: December 18, 2003Publication date: June 23, 2005Inventors: Atsuhiro Sakurai, Yoshihide Iwata
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Publication number: 20050038534Abstract: A time-domain time-scale modification method based on the synchronous overlap-and-add method consists of a generalization of the envelope-matching time-scale modification method. The cross-correlation function employs a fixed-size cross-correlation buffer to eliminate the need for normalization inside the search loop. This fixed-size cross-correlation buffer is the center of the overlap region corresponding to the case where the fine overlap adjustment value is set to zero. The computational cost of this invention is lower than any other method with a comparable quality.Type: ApplicationFiled: November 14, 2003Publication date: February 17, 2005Inventors: Atsuhiro Sakurai, Yoshihide Iwata
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Publication number: 20040133292Abstract: A time-domain time-scale modification method based on the synchronous overlap-and-add method consists of a generalization of the envelope-matching time-scale modification method. The cross-correlation function employs n most significant bits rather than merely the sign bit of the prior envelope matching method. This provides higher accuracy for n>1. A fixed-size cross-correlation buffer is employed to eliminate the need for normalization inside the search loop. This invention makes full use of fast/parallel shift and multiply-and-accumulate (MAC) instructions of current digital signal processors to become at the same time faster and more precise than envelope-matching time-domain time-scale modification.Type: ApplicationFiled: November 14, 2003Publication date: July 8, 2004Inventors: Atsuhiro Sakurai, Yoshihide Iwata
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Patent number: 6584588Abstract: A computer system includes a main processing unit (12) coupled to a DSP/memory module (40). The DSP/memory module (40) includes semiconductor memory (42) and digital signal processor circuitry (44) including one or more digital signal processors (56). The DSP/memory module (40) may be placed in standard main memory sockets, such as a SIMM or DIMM sockets, and used as conventional main memory. The memory module can also be used in a smart mode, wherein the digital signal processor (56) performs operations on data for retrieval by the main processing unit (12).Type: GrantFiled: October 30, 2000Date of Patent: June 24, 2003Assignee: Texas Instruments IncorporatedInventors: Basavaraj I. Pawate, Matthew A. Woolsey, Douglas L. Mahlum, Fred J. Reuter, Yoshihide Iwata, Judd E. Heape
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Patent number: 6185704Abstract: A computer system includes a main processing unit (12) coupled to a DSP/memory module (40). The DSP/memory module (40) includes semiconductor memory (42) and digital signal processor circuitry (44) including one or more digital signal processors (56). The DSP/memory module (40) may be placed in standard main memory sockets, such as a SIMM or DIMM sockets, and used as conventional main memory. The memory module can also be used in a smart mode, wherein the digital signal processor (56) performs operations on data for retrieval by the main processing unit (12).Type: GrantFiled: April 9, 1998Date of Patent: February 6, 2001Assignee: Texas Instruments IncorporatedInventors: Basavaraj I. Pawate, Matthew A. Woolsey, Douglas L. Mahlum, Fred J. Reuter, Yoshihide Iwata, Judd E. Heape