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公开(公告)号：US20230410832A1
公开(公告)日：2023-12-21
申请号：US18033025
申请日：2020-11-05
IPC分类号： G10L21/0388 , G10L19/008
CPC分类号： G10L21/0388 , G10L19/008
摘要： For each frame, an n-th channel compensated decoded sound signal {tilde over ( )}X′n is obtained that is a signal obtained by compensating a high frequency of an n-th channel purified decoded sound signal {tilde over ( )}Xn obtained by performing signal processing in a time domain on an n-th channel decoded sound signal {circumflex over ( )}Xn that is a decoded sound signal of each channel of stereo obtained by decoding a stereo code CS. At this time, for the each frame with respect to the each channel, an n-th channel high-frequency compensation gain ρn that is a value for bringing high-frequency energy of {tilde over ( )}X′n close to high-frequency energy of {circumflex over ( )}Xn is obtained, and for the each frame with respect to the each channel, a signal obtained by adding {tilde over ( )}Xn and a signal obtained by multiplying a high-frequency component of a monaural decoded sound signal that is obtained by decoding a monaural code CM that is a code different from the stereo code CS or a signal obtained by upmixing, for the each channel, the monaural decoded sound signal by the n-th channel high-frequency compensation gain ρn is obtained and output as the n-th channel compensated decoded sound signal {tilde over ( )}X′n.
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2.发明公开公开(公告)号：US20230386480A1
公开(公告)日：2023-11-30
申请号：US18031588
申请日：2020-11-05
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： There is provided a technology that improves, in a case where there is a sound signal obtained from a different code that is different from a code from which a decoded sound signal is obtained and that is derived from the same sound signal, the decoded sound signal by using the sound signal obtained from the different code. A signal (hereinafter, referred to as an upmixed common signal) obtained by upmixing a decoded sound common signal obtained by downmixing a decoded sound signal of each channel is subjected to signal purification using a signal (hereinafter, referred to as an upmixed monaural decoded sound signal) obtained by upmixing a monaural decoded sound signal to thereby generate a purified upmixed signal, and in each channel, the upmixed common signal is subtracted from the decoded sound signal and the purified upmixed signal is added thereto, to thereby generate a purified decoded sound signal.
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公开(公告)号：US20220343740A1
公开(公告)日：2022-10-27
申请号：US17762884
申请日：2019-09-26
发明人： Junji WATANABE , Yutaka KAMAMOTO
摘要： Provided is a vibration presentation system that improves the convenience of a user in sensing vibrations at various body sites, or of a plurality of users in sensing vibrations. A vibration presentation system for presenting vibration signals for perception by tactile sense for media content, the vibration presentation system including: a vibrating body configured to generate vibrations corresponding to the vibration signals of a plurality of channels respectively; and a presentation target batch selection user interface including a plurality of (M, where M is an integer of 2 or more) combinations each of which contains one selection button and designation of a predefined body site for a channel included in the plurality of channels, wherein the vibrating body generates vibrations corresponding to the vibration signals for a body site for a channel included in a combination corresponding to a selection button selected from among M selection buttons.
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公开(公告)号：US20210335375A1
公开(公告)日：2021-10-28
申请号：US17370060
申请日：2021-07-08
发明人： Takehiro MORIYA , Yutaka KAMAMOTO , Noboru HARADA
IPC分类号： G10L19/07 , G10L19/038
摘要： A coding method and a decoding method are provided which can use in combination a predictive coding and decoding method which is a coding and decoding method that can accurately express coefficients which are convertible into linear prediction coefficients with a small code amount and a coding and decoding method that can obtain correctly, by decoding, coefficients which are convertible into linear prediction coefficients of the present frame if a linear prediction coefficient code of the present frame is correctly input to a decoding device. A coding device includes: a predictive coding unit that obtains a first code by coding a differential vector formed of differentials between a vector of coefficients which are convertible into linear prediction coefficients of more than one order of the present frame and a prediction vector containing at least a predicted vector from a past frame, and obtains a quantization differential vector corresponding to the first code; and a non-predictive coding unit that generates a second code by coding a correction vector which is formed of differentials between the vector of the coefficients which are convertible into the linear prediction coefficients of more than one order of the present frame and the quantization differential vector or formed of some of elements of the differentials.
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公开(公告)号：US20210233549A1
公开(公告)日：2021-07-29
申请号：US17053681
申请日：2019-03-22
IPC分类号： G10L21/013 , G10L21/034 , G10L21/0364
摘要： As pitch enhancement processing, a pitch enhancement apparatus obtains, for a time segment judged to be a time segment including a signal that is a consonant, for each time of the time segment, as an output signal, a signal including a signal obtained by adding a signal, which was obtained by multiplying a signal at a time that is an earlier time than the time by the number of samples T0 corresponding to a pitch period of the time segment, the pitch gain σ0 of the time segment, a predetermined constant B0, and a value that is greater than 0 and less than 1, and a signal at the time.
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公开(公告)号：US20210090587A1
公开(公告)日：2021-03-25
申请号：US17053698
申请日：2019-04-23
IPC分类号： G10L21/0364 , G10L25/90 , G10L21/0332
摘要： Provided is pitch enhancement processing having little unnaturalness even in time segments for consonants, and having little unnaturalness to listeners caused by discontinuities even when time segments for consonants and other time segments switch frequently. A pitch emphasis apparatus carries out the following as the pitch enhancement processing: for a time segment in which a spectral envelope of a signal has been determined to be flat, obtaining an output signal for each of times in the time segment, the output signal being a signal including a signal obtained by adding (1) a signal obtained by multiplying the signal of a time, further in the past than the time by a number of samples T0 corresponding to a pitch period of the time segment, a pitch gain σ0 of the time segment, a predetermined constant B0, and a value greater than 0 and less than 1, to (2) the signal of the time.
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公开(公告)号：US20200162102A1
公开(公告)日：2020-05-21
申请号：US16618567
申请日：2018-04-20
IPC分类号： H03M7/40
摘要： An encoding/decoding technique is provided with which encoding can be performed using a small average number of bits even for a sequence of integer values including small non-zero values and having a distribution heavily biased toward small values. The present invention includes an integer encoding part 110 that, with respect to an inputted sequence of non-negative integer values x_n, n∈ {1, 2, . . . , N} (hereinafter referred to as an “integer sequence”), obtains a 1-bit code as a code corresponding to a run of integer values 0 of length L, a predetermined number which satisfies 2≤L≤2K−1, which is included in the integer sequence and obtains a (K×x_n)-bit or (K×x_n+1)-bit code as a code corresponding to a set of a run of integer values 0 of length from 0 to L−1 and one non-zero integer value x_n included in the integer sequence, where K is assumed to be an integer equal to or larger than 2.
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公开(公告)号：US20190304476A1
公开(公告)日：2019-10-03
申请号：US16429590
申请日：2019-06-03
发明人： Takehiro MORIYA , Yutaka KAMAMOTO , Noboru HARADA
IPC分类号： G10L19/07 , G10L19/06 , G10L19/032
摘要： A technology of accurately coding and decoding coefficients which are convertible into linear prediction coefficients even for a frame in which the spectrum variation is great while suppressing an increase in the code amount as a whole is provided. A coding device includes: a first coding unit that obtains a first code by coding coefficients which are convertible into linear prediction coefficients of more than one order; and a second coding unit that obtains a second code by coding at least quantization errors of the first coding unit if (A-1) an index Q commensurate with how high the peak-to-valley height of a spectral envelope is, the spectral envelope corresponding to the coefficients which are convertible into the linear prediction coefficients of more than one order, is larger than or equal to a predetermined threshold value Th1 and/or (B-1) an index Q′ commensurate with how short the peak-to-valley height of the spectral envelope is, is smaller than or equal to a predetermined threshold value Th1′.
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公开(公告)号：US20180294881A1
公开(公告)日：2018-10-11
申请号：US15574319
申请日：2016-04-07
IPC分类号： H04B10/2575 , H04L29/06
摘要： An optical communication system includes a signal processing apparatus and a wireless apparatus between which functions of a base station are divided, wherein a periodic symbol sequence including a cyclic prefix appended to a signal of a predetermined size to which an IFFT (Inverse Fast Fourier Transform) has been applied is transmitted between the signal processing apparatus and the wireless apparatus by means of digital RoF (Radio over Fiber) transmission, the signal processing apparatus and the wireless apparatus each include a transmission unit and a reception unit, the transmission unit includes: a compression size determination unit that acquires symbol information relating to a starting position of the symbol sequence and lengths of symbols constituting the symbol sequence, and that determines, based on the acquired symbol information, a compression size for each of symbols that are to be compressed; and a compression unit that compresses the symbol sequence in units of determined compression sizes, and the reception unit includes: an expansion size determination unit that determines an expansion size for each of symbols in the symbol sequence that are to be expanded; and an expansion unit that expands the symbol sequence in units of determined expansion sizes.
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公开(公告)号：US20180040330A1
公开(公告)日：2018-02-08
申请号：US15725653
申请日：2017-10-05
发明人： Takehiro MORIYA , Noboru HARADA , Yutaka KAMAMOTO
IPC分类号： G10L19/09 , G10L19/032
CPC分类号： G10L19/09 , G10L19/032
摘要： In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity level of the time series signals satisfies a condition indicating high or low in periodicity and/or stationarity. In that decoding, according to whether an index indicating a periodicity and/or stationarity level, the index being included in or obtained from an input code corresponding to the predetermined time interval, satisfies a condition indicating high periodicity and/or stationarity, a decoding mode for a code, included in the input code, corresponding to pitch periods is switched to decode the code corresponding to the pitch periods to obtain the pitch periods corresponding to the predetermined time interval.
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