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1.发明申请VOICE AUDIO ENCODING DEVICE, VOICE AUDIO DECODING DEVICE, VOICE AUDIO ENCODING METHOD, AND VOICE AUDIO DECODING METHOD 有权声音音频编码设备，语音音频解码设备，语音音频编码方法和语音音频解码方法公开(公告)号：US20150317991A1
公开(公告)日：2015-11-05
申请号：US14650093
申请日：2013-11-26
Inventor： Zongxian LIU , Srikanth NAGISETTY , Masahiro OSHIKIRI
IPC: G10L19/02
CPC classification number: G10L19/0204 , G10L19/035
Abstract: Provided are a voice audio encoding device, voice audio decoding device, voice audio encoding method, and voice audio decoding method that efficiently perform bit distribution and improve sound quality. Dominant frequency band identification unit identifies a dominant frequency band having a norm factor value that is the maximum value within the spectrum of an input voice audio signal. Dominant group determination units and non-dominant group determination unit group all sub-bands into a dominant group that contains the dominant frequency band and a non-dominant group that contains no dominant frequency band. Group bit distribution unit distributes bits to each group on the basis of the energy and norm variance of each group. Sub-band bit distribution unit redistributes the bits that have been distributed to each group to each sub-band in accordance with the ratio of the norm to the energy of the groups.
Abstract translation: 提供了有效地执行位分配并提高声音质量的语音音频编码装置，语音音频解码装置，语音音频编码方法和语音音频解码方法。 主导频带识别单元识别具有作为输入语音音频信号的频谱内的最大值的范数因子值的主频带。 优势组确定单位和非优势组确定单元将所有子带分组为包含主频带的显性组和不包含主频带的非优势组。 组位分配单元根据每个组的能量和范数方差分配每个组的位。 子带位分配单元根据标准与组的能量的比例，将已经分配给每个组的位重新分配给每个子带。
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2.发明申请公开(公告)号：US20220120839A1
公开(公告)日：2022-04-21
申请号：US17600513
申请日：2020-03-16
Inventor： Rohith MARS , Srikanth NAGISETTY , Chong Soon LIM , Hiroyuki EHARA , Akihisa KAWAMURA
Abstract: Provided is a direction of arrival estimation device wherein: a calculation circuit calculates a frequency weighting factor for each of a plurality of frequency components of signals recorded in a microphone array, on the basis of the differences among unit vectors indicating the directions of the sound sources of each of the plurality of frequency components; and an estimation circuit estimates the direction of arrival of a signal from the sound source, on the basis of the frequency weighting factors.
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公开(公告)号：US20210280201A1
公开(公告)日：2021-09-09
申请号：US17256899
申请日：2019-07-02
Inventor： Srikanth NAGISETTY , Hiroyuki EHARA , Rohith MARS , Chong Soon LIM , Toshiaki SAKURAI
IPC: G10L19/04 , G10L19/008 , G10L19/02
Abstract: This encoding device is able to encode an S signal efficiently in MS prediction encoding. An M signal encoding unit generates first encoding information by encoding a sum signal indicating a sum of a left channel signal and a right channel signal that constitute a stereo signal. An energy difference calculation unit calculates a prediction parameter for predicting a difference signal indicating a difference between the left channel signal and the right channel signal by using a parameter regarding an energy difference between the left channel signal and the right channel signal. An entropy encoding unit generates second encoding information by encoding the prediction parameter.
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公开(公告)号：US20170323649A1
公开(公告)日：2017-11-09
申请号：US15659023
申请日：2017-07-25
Inventor： Srikanth NAGISETTY , Zongxian LIU
IPC: G10L19/02 , G10L21/038 , G10L19/24 , G10L19/16 , G10L25/18 , G10L19/035
CPC classification number: G10L19/0204 , G10L19/035 , G10L19/167 , G10L19/24 , G10L21/038 , G10L25/18
Abstract: An audio signal decoding apparatus is provided that includes a receiver that receives an encoded information, a memory, and a processor that demultiplexes the encoded information, including encoding parameters that are used for decoding a low frequency spectrum and index information that identifies a most correlated portion from a low frequency spectrum for one or more high frequency subbands. The processor also replicates a high frequency subband spectrum based on the index information using a synthesized low frequency spectrum, the synthesized low frequency spectrum being obtained by decoding the encoding parameters. The processor further estimates a frequency of a harmonic component in the synthesized low frequency spectrum, adjusts a frequency of a harmonic component in the high frequency subband spectrum using the estimated harmonic frequency, and generates an output signal using the synthesized low frequency spectrum and the high frequency subband spectrum.
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公开(公告)号：US20160111103A1
公开(公告)日：2016-04-21
申请号：US14894062
申请日：2014-06-10
Inventor： Srikanth NAGISETTY , Zongxian LIU
CPC classification number: G10L19/0204 , G10L19/035 , G10L19/167 , G10L19/24 , G10L21/038 , G10L25/18
Abstract: The purpose of the present invention is to more efficiently extend, using a low bit rate, the bandwidth of input signals having a harmonics structure, in order to obtain better audio quality. The present invention is installed in a device that extends bandwidth for audio signal encoding and decoding. This novel bandwidth extension encoding identifies a low-frequency spectrum component having the highest correlation to a high-frequency bandwidth signal among input signals, duplicates a high-frequency spectrum by energy adjustment of said component, and maintains the harmonic relationship between the low-frequency spectrum and the duplicated high-frequency spectrum by adjusting the spectral peak position of the duplicated high-frequency spectrum, on the basis of a harmonic frequency estimated from a composite low-frequency spectrum.
Abstract translation: 本发明的目的是为了获得更好的音频质量，使用低比特率更有效地扩展具有谐波结构的输入信号的带宽。 本发明安装在扩展用于音频信号编码和解码的带宽的设备中。 这种新颖的带宽扩展编码识别与输入信号之间的高频带宽信号具有最高相关性的低频频谱分量，通过所述分量的能量调整复制高频频谱，并维持低频率之间的谐波关系 基于从复合低频谱估计的谐波频率，通过调整复制的高频谱的频谱峰值位置，生成频谱和重复的高频谱。
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Patent Agency Ranking
公开(公告)号：US20250022478A1
公开(公告)日：2025-01-16
申请号：US18712143
申请日：2022-10-14
Inventor： Srikanth NAGISETTY , Chong Soon LIM , Hiroyuki EHARA , Akira HARADA
IPC: G10L19/038 , G10L19/00 , G10L19/002
Abstract: An encoding device comprising: a quantization circuit that generates a quantization parameter that includes information about a vector quantization codebook; and a control circuit that sets the number of available bits according to conditions for encoding based on the difference between the number of bits available for encoding of the target sub-vector and the number of bits for the quantization parameter of the target sub-vector.
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公开(公告)号：US20230238012A1
公开(公告)日：2023-07-27
申请号：US18009174
申请日：2021-04-22
Inventor： Srikanth NAGISETTY , Hiroyuki EHARA , Akira HARADA , Chong Soon LIM
IPC: G10L19/038 , H03M7/40
CPC classification number: G10L19/038 , H03M7/40
Abstract: An encoding device is provided with: a quantizing circuit which generates quantization parameters including first information on a vector quantization codebook, and second information on code vectors included in the codebook; and a control circuit which employs the second number of bits based on the difference between the first number of bits available for encoding of a sub-vector in the vector quantization, and the number of bits for the sub-vector quantization parameters, to control encoding of the first information with respect to the sub-vector.
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8.发明申请公开(公告)号：US20170345431A1
公开(公告)日：2017-11-30
申请号：US15673957
申请日：2017-08-10
Inventor： Zongxian LIU , Srikanth NAGISETTY , Masahiro OSHIKIRI
IPC: G10L19/02 , G10L19/035
CPC classification number: G10L19/0204 , G10L19/035
Abstract: Provided are a voice audio encoding device, voice audio decoding device, voice audio encoding method, and voice audio decoding method that efficiently perform bit distribution and improve sound quality. Dominant frequency band identification unit identifies a dominant frequency band having a norm factor value that is the maximum value within the spectrum of an input voice audio signal. Dominant group determination units and non-dominant group determination unit group all sub-bands into a dominant group that contains the dominant frequency band and a non-dominant group that contains no dominant frequency band. Group bit distribution unit distributes bits to each group on the basis of the energy and norm variance of each group. Sub-band bit distribution unit redistributes the bits that have been distributed to each group to each sub-band in accordance with the ratio of the norm to the energy of the groups.
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公开(公告)号：US20240177723A1
公开(公告)日：2024-05-30
申请号：US18283404
申请日：2021-11-16
Inventor： Srikanth NAGISETTY , Chong Soon LIM , Hiroyuki EHARA , Akira HARADA
IPC: G10L19/038
CPC classification number: G10L19/038
Abstract: An encoding apparatus includes: a quantization circuit that generates a quantization parameter including first information related to a codebook of vector quantization and second information related to code vectors included in the codebook; and a control circuit that determines which one of first encoding of the first information for the target sub-vector and second encoding of a second number of bits based on the difference between an allocated number of bits for vector quantization and the number of bits of the quantization parameter is to be executed, in accordance with the number of bits available for encoding sub-vectors including at least a target sub-vector among a plurality of sub-vectors in the vector quantization.
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公开(公告)号：US20210183356A1
公开(公告)日：2021-06-17
申请号：US17257413
申请日：2019-09-06
Inventor： Rohith MARS , Srikanth NAGISETTY , Chong Soon LIM , Hiroyuki EHARA , Akihisa KAWAMURA
Abstract: In the acoustic object extraction device, beam forming processing units generate a first acoustic signal by beam forming in an arrival direction of a signal from an acoustic object with respect to a microphone array and generate a second acoustic signal by beam forming in an arrival direction of a signal from the acoustic object with respect to a microphone array, and a common component extraction unit extracts, on the basis of a similarity between the spectrum of the first acoustic signal and the spectrum of the second acoustic signal and from the first acoustic signal and the second acoustic signal, a signal containing a common component corresponding to the acoustic object. The common component extraction unit divides the spectrums of the first acoustic signal and the second acoustic signal into a plurality of frequency sections and calculates a similarity for each of the frequency sections.
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