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1. 发明授权

US10510354B2 Speech audio encoding device, speech audio decoding device, speech audio encoding method, and speech audio decoding method 有权
公开(公告)号：US10510354B2
公开(公告)日：2019-12-17
申请号：US16243588
申请日：2019-01-09
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Masahiro Oshikiri
IPC分类号： G10L19/02 , G10L19/032 , G10L19/002 , G10L21/038 , G10L19/24
摘要： A speech/audio coding apparatus includes a receiver that receives a time-domain speech input signal. The apparatus also includes a processor that transforms a time-domain speech input signal into a frequency-domain spectrum, and divides a frequency region of the spectrum in an extended band into a plurality of bands. The processor sets a limited band for each divided band in the current frame, a width of the limited band in the current frame being narrower than the divided band and the limited band including a first frequency. The processor further encodes the spectrum in the limited band within each divided band in the current frame, wherein the width of the limited band is predetermined and is set to 31.

2. 发明授权

US09892740B2 Speech audio encoding device, speech audio decoding device, speech audio encoding method, and speech audio decoding method 有权
公开(公告)号：US09892740B2
公开(公告)日：2018-02-13
申请号：US15590360
申请日：2017-05-09
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Masahiro Oshikiri
IPC分类号： G10L19/02 , G10L19/002 , G10L19/032
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/24 , G10L21/038
摘要： A speech/audio coding apparatus is provided that includes a receiver that receives a time-domain speech input signal and a processor. The processor transforms a time-domain speech input signal into a frequency-domain spectrum, and divides a frequency region of the spectrum in an extended band into a plurality of bands. The processor also sets a limited band for each divided band in the current frame, when a difference between a first frequency with a first maximum amplitude in a spectrum of the divided band in a preceding frame and a second frequency with a second maximum amplitude in a spectrum of the divided band in a current frame is below a threshold. The processor further encodes the spectrum in the limited band within each divided band in the current frame, and does not encode a spectrum outside the limited band within each divided band in the current frame.

3. 发明授权

US09886964B2 Encoding apparatus, decoding apparatus, and methods 有权
公开(公告)号：US09886964B2
公开(公告)日：2018-02-06
申请号：US15646645
申请日：2017-07-11
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Katsunori Daimou , Masahiro Oshikiri
IPC分类号： G10L21/0388 , G10L19/26 , G10L19/02
CPC分类号： G10L19/265 , G10L19/0204 , G10L21/0388
摘要： A coding apparatus encodes a first band of an input audio signal, normalizes a first spectrum included in each sub-band of the first band using a spectrum power envelope, performs a clipping process on the normalized first spectrum, the clipping process comparing between a predetermined threshold and the absolute value of an amplitude of the spectrum and replaces the amplitude value of the spectrum with the threshold if the absolute value of the amplitude of the spectrum exceeds the threshold, calculates a correlation between a spectrum in each divided band of a second band and a spectrum in a plurality of candidate bands containing the clipped normalized first spectrum, the second spectrum being higher than a predetermined frequency, identifies the best bands of the plurality of candidate bands, and encodes the second spectrum using lag information identifying the best band for transmitting the lag information to a decoder.

4. 发明授权

US10515648B2 Audio/speech encoding apparatus and method, and audio/speech decoding apparatus and method 有权
公开(公告)号：US10515648B2
公开(公告)日：2019-12-24
申请号：US16225851
申请日：2018-12-19
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Zongxian Liu , Kok Seng Chong , Masahiro Oshikiri
IPC分类号： G10L19/032 , G10L19/02 , G10L19/00
摘要： An audio/speech encoding method is provided that includes transforming a time domain input signal to a frequency spectrum, and dividing the frequency spectrum to a plural of bands. The method also includes calculating a level of energies for each band, quantizing the energies for the each band, and calculating differential indices. The method additionally includes modifying a range of the differential indices for the Nth band when N is an integer of 2 or more, and replacing the differential index with the modified differential index, and not modifying a range of the differential indices for the Nth band when N is an integer of 1. The method further includes encoding the differential indices using a Huffman table selected based on a minimum value and a maximum value of the differential indices, and transmitting the encoded differential indices and a flag signal for indicating the selected Huffman table.

5. 发明授权

US09472200B2 Encoding apparatus and encoding method 有权
标题翻译：编码装置和编码方法
公开(公告)号：US09472200B2
公开(公告)日：2016-10-18
申请号：US15079524
申请日：2016-03-24
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Masahiro Oshikiri
IPC分类号： G10L19/24 , G10L19/02 , G10L21/0388 , G10L25/06
CPC分类号： G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L21/0388 , G10L25/06
摘要： A threshold amplitude is calculated for each subband obtained by splitting an extension band. For each subband, an amplitude of transform coefficients is compared with the threshold amplitude to extract a transform coefficient having an amplitude larger than the threshold amplitude as a representative transform coefficient. When a number of the extracted representative transform coefficients is less than a predetermined number, the threshold amplitude is updated in accordance with an amount by which the number of the representative transform coefficients is less than the predetermined number. A transform coefficient is extracted again using the updated threshold amplitude. For each of the subbands, a value of correlation is calculated between the representative transform coefficient and a normalized core encoded low-band transform coefficient. A subband having a largest value of correlation is selected when the number of the extracted representative transform coefficients reaches the predetermined number.
摘要翻译：对通过分割扩展频带获得的每个子带计算阈值振幅。对于每个子带，将变换系数的幅度与阈值幅度进行比较，以提取具有大于阈值振幅的幅度的变换系数作为代表变换系数。当提取的代表性变换系数的数量小于预定数量时，根据代表变换系数的数量小于预定数量的量来更新阈值幅度。使用更新的阈值振幅再次提取变换系数。对于每个子带，在代表变换系数和归一化的核心编码低频带变换系数之间计算相关值。当提取的代表变换系数的数量达到预定数量时，选择具有最大相关值的子带。

6. 发明申请

US20150294673A1 SPEECH AUDIO ENCODING DEVICE, SPEECH AUDIO DECODING DEVICE, SPEECH AUDIO ENCODING METHOD, AND SPEECH AUDIO DECODING METHOD 有权
标题翻译：语音音频编码设备，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：US20150294673A1
公开(公告)日：2015-10-15
申请号：US14439090
申请日：2013-11-01
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Masahiro Oshikiri
IPC分类号： G10L19/02 , G10L19/002
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/24 , G10L21/038
摘要： By the present invention, the number of encoding bits allocated to encoding of extended-band spectrum is reduced while degradation of sound quality in the extended band is suppressed. A band compression unit creates combinations of sub-band spectra in pairs of two samples each in order from a low-range side in a band compression target sub-band, selects a spectrum having a large absolute-value amplitude among the combinations, and arranges the selected spectrum close to the low-range side on a frequency axis. A number-of-units recalculation unit redistributes bits saved in the sub-band for which band compression was performed to a low range outside the extended band, and redistributes the number of units on the basis of the redistributed bits.
摘要翻译：通过本发明，减少分配给扩展频带频谱编码的编码比特数，同时抑制扩展频带中的声音质量下降。频带压缩单元从频带压缩目标子频带中的低范围侧按顺序创建成对的两个样本的子带频谱的组合，选择组合之中具有大的绝对值幅度的频谱，并且布置所选频谱在频率轴上靠近低范围侧。单元重新计算单元将保存在进行了频带压缩的子带中的比特重新分配到扩展频带之外的低范围，并且基于再分配比特重新分配单元数。

7. 发明申请

US20150025879A1 AUDIO AND SPEECH CODING DEVICE, AUDIO AND SPEECH DECODING DEVICE, METHOD FOR CODING AUDIO AND SPEECH, AND METHOD FOR DECODING AUDIO AND SPEECH 有权
标题翻译：音频和语音编码设备，音频和语音解码设备，用于编码音频和语音的方法以及用于解码音频和语音的方法
公开(公告)号：US20150025879A1
公开(公告)日：2015-01-22
申请号：US14376501
申请日：2013-02-01
申请人： Panasonic Intellectual Property Corporation of America
发明人： Zongxian Liu , Srikanth Nagisetty , Masahiro Oshikiri
IPC分类号： G10L19/038 , G10L19/16
CPC分类号： G10L19/038 , G10L19/12 , G10L19/16
摘要： This invention introduces audio/speech encoding apparatus audio/speech decoding apparatus, audio/speech encoding method and audio/speech decoding method to efficiently encode the quantization parameters of split multi-rate lattice vector quantization. In this invention, the position of the sub-vector whose codebook indication consumes the most bits is firstly located, and then the value of the codebook is estimated based on the total number of bits available and the bits usage information for other sub-vectors. The difference value is calculated between the actual value and estimated value. Finally, instead of transmitting the codebook indication which consumes the most bits, the position of the sub-vector whose codebook indication consumes the most bits and the difference value between the actual value and the estimated value are transmitted. By applying of the invented method, bits can be saved by the codebook indications.
摘要翻译：本发明引入音频/语音编码装置音频/语音解码装置，音频/语音编码方法和音频/语音解码方法，以有效地编码分割多速率格子矢量量化的量化参数。在本发明中，首先定位其码本指示消耗最多位的子向量的位置，然后基于可用的总位数和其他子向量的比特使用信息来估计码本的值。差值在实际值和估计值之间计算。最后，传送码本指示消耗最多位的子向量的位置和实际值与估计值之间的差值，而不是发送消耗最多位的码本指示。通过应用本发明的方法，可以通过码本指示来保存位。

8. 发明授权

US10446159B2 Speech/audio encoding apparatus and method thereof 有权
公开(公告)号：US10446159B2
公开(公告)日：2019-10-15
申请号：US15358184
申请日：2016-11-22
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Masahiro Oshikiri
IPC分类号： G10L19/02 , G10L19/06 , G10L19/002 , G10L19/12 , G10L19/035
摘要： A speech/audio encoding device for selectively allocating bits for higher precision encoding. The speech/audio encoding device receives a time-domain speech/audio input signal, transforms the speech/audio input signal into a frequency domain, and quantizes an energy envelope corresponding to an energy level for a frequency spectrum of the speech/audio input signal. The speech/audio encoding device further groups quantized energy envelopes into a plurality of groups, determines a perceptual significant group including one or more significant bands and a local-peak frequency, and allocates bits to a plurality of subbands corresponding to the grouped quantized energy envelopes, in which each of the subbands is obtained by splitting the frequency spectrum of the speech/audio input signal. The speech/audio encoding device encodes the frequency spectrum using the bits allocated to the subbands.

9. 发明授权

US10204632B2 Audio/speech encoding apparatus and method, and audio/speech decoding apparatus and method 有权
公开(公告)号：US10204632B2
公开(公告)日：2019-02-12
申请号：US15839056
申请日：2017-12-12
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Zongxian Liu , Kok Seng Chong , Masahiro Oshikiri
IPC分类号： G10L19/032 , G10L19/02 , G10L19/00
摘要： An audio/speech encoding apparatus/method and an audio/speech decoding apparatus/method are provided. The audio/speech encoding apparatus includes a memory that stores instructions, and a processor that performs operations. The operations include transforming a time domain input audio/speech signal to a frequency spectrum, dividing the frequency spectrum to a plural of bands, calculating norm factors, and quantizing the norm factors. The operations also include calculating differential indices between an Nth band index and an (N−1)th band index, and modifying a range of the differential indices for the Nth band when N is 2 or more. The operations further include replacing the differential index with the modified differential index, and not modifying a range of the differential indices for the Nth band when N is 1. The apparatus encodes the differential indices using a selected Huffman table, and transmits the encoded differential indices and a flag signal over a communication network.

10. 发明授权

US09679576B2 Speech audio encoding device, speech audio decoding device, speech audio encoding method, and speech audio decoding method 有权
公开(公告)号：US09679576B2
公开(公告)日：2017-06-13
申请号：US14439090
申请日：2013-11-01
申请人： PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
发明人： Takuya Kawashima , Masahiro Oshikiri
IPC分类号： G10L21/00 , G10L19/02 , G10L19/002 , G10L19/032 , G10L21/038 , G10L19/24
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/02 , G10L19/0212 , G10L19/032 , G10L19/24 , G10L21/038
摘要： A speech/audio coding apparatus and method is provided. The number of encoding bits allocated to encoding of extended-band spectrum is reduced while degradation of sound quality in the extended band is suppressed. A band compression unit creates combinations of sub-band spectra in pairs of two samples each in order from a low-range side in a band compression target sub-band, selects a spectrum having a large absolute-value amplitude among the combinations, and arranges the selected spectrum close to the low-range side on a frequency axis. A number-of-units recalculation unit redistributes bits saved in the sub-band for which band compression was performed to a low range outside the extended band, and redistributes the number of units on the basis of the redistributed bits.

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