Patents by Inventor Tadashi Yamaura
Tadashi Yamaura 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).
-
Patent number: 10129410Abstract: An echo canceller device includes a band adjuster including a filter for performing band adjustment by applying a gain to a signal in a specific frequency band of an input signal, an adaptive filter for inputting a speech reception signal, updating a filter coefficient, and generating a pseudo echo signal using the updated filter coefficient, a band corrector including a filter for correcting a frequency characteristic of a signal obtained by subtracting the pseudo echo signal from an input signal, to a frequency characteristic of the input signal prior to the band adjustment, and a residual echo suppressor for suppressing an echo component that remains in a signal, by a suppression amount, and the residual echo suppressor sets the suppression amount for a signal in a specific frequency band that has been subjected to the band adjustment.Type: GrantFiled: December 15, 2014Date of Patent: November 13, 2018Assignee: MISTUBISHI ELECTRIC CORPORATIONInventors: Tomoharu Awano, Satoru Furuta, Tadashi Yamaura
-
Patent number: 9899022Abstract: An output information generator generates abstract output information unrelated to the types of outputters according to information from an input unit. Semantic interpreters of the outputters generate pieces of embodied output information from the abstract output information on the basis of monitor results from status monitors which monitor the operating statuses of the corresponding outputters. Processing performers perform processes corresponding to the pieces of embodied output information.Type: GrantFiled: September 18, 2014Date of Patent: February 20, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Keigo Kawashima, Takahiro Otsuka, Tadashi Yamaura
-
Patent number: 9852740Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.Type: GrantFiled: February 12, 2016Date of Patent: December 26, 2017Assignee: BlackBerry LimitedInventor: Tadashi Yamaura
-
Patent number: 9716797Abstract: A mobile wireless communication control device includes a moving object information holder that stores a communication state of each moving object which moves in a plurality of wireless zones and information showing a wireless zone to which the moving object belongs, and a call admission determinator that refers to the information held by the moving object information holder, and determines whether a moving object which is going to start communications can start the communications on the basis of the number of calls of moving objects in communication in a first wireless zone to which the moving object which is going to start the communications belongs, and the number of calls of moving objects in communication in a second wireless zone adjacent to the first wireless zone.Type: GrantFiled: March 11, 2013Date of Patent: July 25, 2017Assignee: Mitsubishi Electric CorporationInventors: Shigeaki Suzuki, Wataru Fushimi, Tadashi Yamaura
-
Publication number: 20170195496Abstract: An echo canceller device includes a band adjuster including a filter for performing band adjustment by applying a gain to a signal in a specific frequency band of an input signal, an adaptive filter for inputting a speech reception signal, updating a filter coefficient, and generating a pseudo echo signal using the updated filter coefficient, a band corrector including a filter for correcting a frequency characteristic of a signal obtained by subtracting the pseudo echo signal from an input signal, to a frequency characteristic of the input signal prior to the band adjustment, and a residual echo suppressor for suppressing an echo component that remains in a signal, by a suppression amount, and the residual echo suppressor sets the suppression amount for a signal in a specific frequency band that has been subjected to the band adjustment.Type: ApplicationFiled: December 15, 2014Publication date: July 6, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomoharu AWANO, Satoru FURUTA, Tadashi YAMAURA
-
Publication number: 20160322047Abstract: An output information generator 3 generates abstract output information 4 unrelated to the types of outputters 5a, 5b, and . . . according to information from an input unit 1. Semantic interpreters 54a, 54b, and . . . of the outputters 5a, 5b, and . . . generate pieces of embodied output information 55a, 55b, and . . . from the abstract output information 4 on the basis of monitor results from status monitors 51a, 51b, and . . . which monitor the operating statuses of the corresponding outputters. Processing performers 56a, 56b, and . . . perform processes corresponding to the pieces of embodied output information 55a, 55b, and . . . .Type: ApplicationFiled: September 18, 2014Publication date: November 3, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Keigo KAWASHIMA, Takahiro OTSUKA, Tadashi YAMAURA
-
Patent number: 9390718Abstract: A sound source generating unit 101 generates from a narrowband audio signal not passing through noise suppression a sound source signal including a fine structure of a band to be restored. On the other hand, a noise suppressing unit 102 performs noise suppression of the narrowband audio signal and a spectral envelope estimating unit 103 estimates an spectral envelope of the band to be restored. A signal synthesizing unit 104 generates a pseudo-audio signal by combining the sound source signal and the spectral envelope, and the band-pass filter unit 105 passes the pseudo-audio signal of the band to be restored, and the signal addition unit 106 generates a broadband audio restoration signal by adding the pseudo-audio signal of the band to be restored to the narrowband audio signal.Type: GrantFiled: December 27, 2011Date of Patent: July 12, 2016Assignee: Mitsubishi Electric CorporationInventors: Kosuke Hosoya, Satoru Furuta, Tadashi Yamaura
-
Publication number: 20160163325Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal.Type: ApplicationFiled: February 12, 2016Publication date: June 9, 2016Applicant: BlackBerry LimitedInventor: Tadashi Yamaura
-
Patent number: 9263025Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.Type: GrantFiled: February 25, 2014Date of Patent: February 16, 2016Assignee: BlackBerry LimitedInventor: Tadashi Yamaura
-
Patent number: 9230536Abstract: A candidate voice segment sequence generator 1 generates candidate voice segment sequences 102 for an input language information sequence 101 by using DB voice segments 105 in a voice segment database 4. An output voice segment sequence determinator 2 calculates a degree of match between the input language information sequence 101 and each of the candidate voice segment sequences 102 by using a parameter 107 showing a value according to a cooccurrence criterion 106 for cooccurrence between the input language information sequence 101 and a sound parameter showing the attribute of each of a plurality of candidate voice segments in each of the candidate voice segment sequences 102, and determines an output voice segment sequence 103 on the basis of the degree of match.Type: GrantFiled: February 21, 2014Date of Patent: January 5, 2016Assignee: Mitsubishi Electric CorporationInventors: Takahiro Otsuka, Keigo Kawashima, Satoru Furuta, Tadashi Yamaura
-
Publication number: 20150350454Abstract: A mobile wireless communication control device includes a moving object information holder that stores a communication state of each moving object which moves in a plurality of wireless zones and information showing a wireless zone to which the moving object belongs, and a call admission determinator that refers to the information held by the moving object information holder, and determines whether a moving object which is going to start communications can start the communications on the basis of the number of calls of moving objects in communication in a first wireless zone to which the moving object which is going to start the communications belongs, and the number of calls of moving objects in communication in a second wireless zone adjacent to the first wireless zone.Type: ApplicationFiled: March 11, 2013Publication date: December 3, 2015Applicant: Mitsubishi Electric CorporationInventors: Shigeaki SUZUKI, Wataru FUSHIMI, Tadashi YAMAURA
-
Publication number: 20150088520Abstract: A candidate voice segment sequence generator 1 generates candidate voice segment sequences 102 for an input language information sequence 101 by using DB voice segments 105 in a voice segment database 4. An output voice segment sequence determinator 2 calculates a degree of match between the input language information sequence 101 and each of the candidate voice segment sequences 102 by using a parameter 107 showing a value according to a cooccurrence criterion 106 for cooccurrence between the input language information sequence 101 and a sound parameter showing the attribute of each of a plurality of candidate voice segments in each of the candidate voice segment sequences 102, and determines an output voice segment sequence 103 on the basis of the degree of match.Type: ApplicationFiled: February 21, 2014Publication date: March 26, 2015Applicant: Mitsubishi Electric CorporationInventors: Takahiro OTSUKA, Keigo KAWASHIMA, Satoru FURUTA, Tadashi YAMAURA
-
Publication number: 20140207443Abstract: A sound source generating unit 101 generates from a narrowband audio signal not passing through noise suppression a sound source signal including a fine structure of a band to be restored. On the other hand, a noise suppressing unit 102 performs noise suppression of the narrowband audio signal and a spectral envelope estimating unit 103 estimates an spectral envelope of the band to be restored. A signal synthesizing unit 104 generates a pseudo-audio signal by combining the sound source signal and the spectral envelope, and the band-pass filter unit 105 passes the pseudo-audio signal of the band to be restored, and the signal addition unit 106 generates a broadband audio restoration signal by adding the pseudo-audio signal of the band to be restored to the narrowband audio signal.Type: ApplicationFiled: December 27, 2011Publication date: July 24, 2014Applicant: Mitsubishi Electric CorporationInventors: Kosuke Hosoya, Satoru Furuta, Tadashi Yamaura
-
Publication number: 20140180696Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal.Type: ApplicationFiled: February 25, 2014Publication date: June 26, 2014Applicant: BlackBerry LimitedInventor: Tadashi YAMAURA
-
Patent number: 8688439Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. Ina speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation code books are used based on an evaluation result.Type: GrantFiled: March 11, 2013Date of Patent: April 1, 2014Assignee: BlackBerry LimitedInventor: Tadashi Yamaura
-
Patent number: 8447593Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.Type: GrantFiled: September 14, 2012Date of Patent: May 21, 2013Assignee: Research In Motion LimitedInventor: Tadashi Yamaura
-
Publication number: 20130024198Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal.Type: ApplicationFiled: September 14, 2012Publication date: January 24, 2013Applicant: RESEARCH IN MOTION LIMITEDInventor: Tadashi YAMAURA
-
Patent number: 8352255Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.Type: GrantFiled: February 17, 2012Date of Patent: January 8, 2013Assignee: Research In Motion LimitedInventor: Tadashi Yamaura
-
Publication number: 20120150535Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal.Type: ApplicationFiled: February 17, 2012Publication date: June 14, 2012Applicant: Research In Motion LimitedInventor: Tadashi YAMAURA
-
Patent number: 8190428Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.Type: GrantFiled: March 28, 2011Date of Patent: May 29, 2012Assignee: Research In Motion LimitedInventor: Tadashi Yamaura