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21. 发明专利

JP2009003387A Pitch search device, packet loss compensation device, and their method, program and its recording medium 有权
标题翻译： PITCH搜索设备，分组丢失补偿设备及其方法，程序及其记录介质
公开(公告)号：JP2009003387A
公开(公告)日：2009-01-08
申请号：JP2007166882
申请日：2007-06-25
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： OMURO NAKA , SASAKI SHIGEAKI , HIWAZAKI YUUSUKE , MORI TAKESHI , KATAOKA AKITOSHI
IPC分类号： G10L19/00 , G10L11/04
摘要： PROBLEM TO BE SOLVED: To provide technology for accurately estimating a pitch, which is used for, for example, packet loss concealment (packet loss compensation).
SOLUTION: Two or more candidate periods are allocated to an audio signal, and a candidate period comparison scale which is an index expressing how steady the audio signal is, is calculated for each candidate period, from the audio signal of each allocated candidate period. By comparing the candidate period comparison scales for respective candidate periods, one steady candidate period is determined among each candidate period, and the candidate period is set to a reference period. On the basis of the reference period, the pitch of the audio signal is calculated. The audio signal of a length of the pitch is segmented, and lined in a lost frame part, and thereby, the part in which the packet has been lost, is compensated.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供用于准确估计用于例如分组丢失隐藏（分组丢失补偿）的音调的技术。解决方案：根据每个分配的候选者的音频信号，为每个候选周期计算两个或更多个候选周期，并且作为表示音频信号稳定的索引的候选周期比较比例被分配给音频信号期。通过比较各个候选周期的候选周期比较比例，在每个候选周期之间确定一个稳定候选周期，并将候选周期设置为参考周期。基于参考周期，计算音频信号的音调。音调长度的音频信号被分割，并且在丢失的帧部分中排列，从而补偿分组丢失的部分。版权所有（C）2009，JPO＆INPIT

22. 发明专利

JP2003029790A Voice encoder and voice decoder 审中-公开
标题翻译：语音编码器和语音解码器
公开(公告)号：JP2003029790A
公开(公告)日：2003-01-31
申请号：JP2001214428
申请日：2001-07-13
申请人： Matsushita Electric Ind Co Ltd , Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , 松下電器産業株式会社
发明人： YONEZAKI TADASHI , YOSHIDA KOJI , SASAKI SHIGEAKI , MANO KAZUNORI , KATAOKA AKITOSHI
IPC分类号： G10L19/00 , G10L11/06 , G10L19/04 , G10L19/12
摘要： PROBLEM TO BE SOLVED: To perform encoding and decoding without necessity to transmit the sounding detection result from an encoder to a decoder.
SOLUTION: According to the detector result of a sounding detector 104, an input voice is outputted to a voice encoding part 102 or voice decoding part 103 by a switching part 101. An input signal is encoded and spectrum information, power information and sound source information are outputted to a multiplexing part 105 by the voice encoding part 102. An input signal is encoded and spectrum information, power information and sound source information are outputted to the multiplexing part 105 by the voice decoding part 103. On the basis of the information of the encoded input signal outputted from the voice encoding part 102 or voice decoding part 103, it is decided by the sounding detector 104 whether the input signal is sounded or not. Then, the result is outputted to the switching part 101 by the sounding detector 104.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：进行编码和解码，而不必将编码器的探测结果发送到解码器。解决方案：根据探测器104的检测结果，输入声音由切换部分101输出到语音编码部分102或语音解码部分103.输入信号被编码，频谱信息，功率信息和声源信息由语音编码部分102输出到多路复用部分105.输入信号被编码，频谱信息，功率信息和声源信息由语音解码部分103输出到复用部分105.根据从语音编码部102或语音解码部103输出的编码输入信号，由探测器104判断输入信号是否发声。然后，通过探测器104将结果输出到切换部101。

23. 发明专利

JP2013003330A Stereo signal encoding method, stereo signal encoding device, and program 审中-公开
标题翻译：立体声信号编码方法，立体声信号编码装置和程序
公开(公告)号：JP2013003330A
公开(公告)日：2013-01-07
申请号：JP2011133873
申请日：2011-06-16
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SASAKI SHIGEAKI , OMURO NAKA , HIWAZAKI YUUSUKE , FUKUI KATSUHIRO
IPC分类号： G10L19/008 , H03M7/30
摘要： PROBLEM TO BE SOLVED: To provide a stereo signal encoding device capable of suppressing quantization noise generated when there is a large deviation between a signal level of an L channel and a signal level of an R channel without performing a different process from a conventional one in a stereo signal decoding device.SOLUTION: The stereo signal encoding device includes: an M channel encoding section for encoding a sum signal (hereinafter referred to as an M channel signal) of input two channel signals, with an L channel signal and an R channel signal defined as the inputs; and an S channel encoding section for encoding a signal formed by multiplying a difference signal (hereinafter referred to as an S channel signal) between the input two channel signals, by a weighting coefficient γ that takes a smaller value as the level ratio or a level difference of the two channel signals becomes greater.
摘要翻译：要解决的问题：提供一种立体声信号编码装置，其能够抑制当在L信道的信号电平和R信道的信号电平之间存在大的偏差而产生的量化噪声，而不执行与常规的立体声信号解码装置。解决方案：立体声信号编码装置包括：M通道编码部分，用于将输入的两个信道信号的和信号（以下称为M信道信号）与L信道信号和被定义为输入; 以及S通道编码部分，用于对通过将输入的两个信道信号之间的差分信号（以下称为S信道信号）相乘的加权系数γ进行编码，该加权系数γ取较小的值作为电平比或电平两个信道信号的差异变大。版权所有（C）2013，JPO＆INPIT

24. 发明专利

JP2012242470A Signal band widening device, signal band widening method, and program therefor 有权
标题翻译：信号带宽宽带设备，信号线宽带化方法及其程序
公开(公告)号：JP2012242470A
公开(公告)日：2012-12-10
申请号：JP2011110148
申请日：2011-05-17
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： OMURO NAKA , SASAKI SHIGEAKI , OKAMOTO MANABU
IPC分类号： G10L21/04 , G10L21/02
摘要： PROBLEM TO BE SOLVED: To stably generate a high-quality pseudo-wideband signal regardless of a communication correspondent.SOLUTION: A signal band widening method includes the steps of: applying parallel bypass filtering to a narrowband signal using two different cutoff frequencies; calculating a power ratio between the post-filtering narrowband signals; determining a low-frequency enhancement level in accordance with the value of the ratio; subsequently calculating a modified gain factor from a gain factor for enhancing the low-frequency and the low-frequency enhancement level; multiplying the low-frequency enhancement level by the frequency-domain-converted narrowband signal to generate a low-frequency-enhanced frequency-domain signal; further duplicating a part of or the entire frequency-domain-converted narrowband signal to thereby generate a signal of a frequency band exceeding 4 kHz; combining the low-frequency-enhanced frequency-domain signal and the signal of a frequency band exceeding 4 kHz to generate a frequency domain wideband signal; and converting the signal into a temporal domain to generate a pseudo-wideband signal.
摘要翻译：要解决的问题：无论通信对方如何，都能稳定地生成高质量的伪宽带信号。解决方案：信号频带扩展方法包括以下步骤：使用两个不同的截止频率对窄带信号应用并行旁路滤波; 计算后滤波窄带信号之间的功率比; 根据所述比率的值确定低频增强级别; 随后从用于增强低频和低频增强水平的增益因子计算修改的增益因子; 将低频增强级乘以频域转换的窄带信号以产生低频增强的频域信号; 进一步复制一部分或整个频域转换的窄带信号，从而产生超过4kHz的频带的信号; 组合低频增强频域信号和超过4kHz的频带的信号以产生频域宽带信号; 并将信号转换成时域以产生伪宽带信号。版权所有（C）2013，JPO＆INPIT

25. 发明专利

JP2011009861A Encoding method, decoding method, encoder, decoder, and program 有权
标题翻译：编码方法，解码方法，编码器，解码器和程序
公开(公告)号：JP2011009861A
公开(公告)日：2011-01-13
申请号：JP2009148956
申请日：2009-06-23
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： FUKUI KATSUHIRO , SASAKI SHIGEAKI , TSUTSUMI KIMITAKA , HIWAZAKI YUUSUKE
IPC分类号： H03M7/30 , G10L19/02
摘要： PROBLEM TO BE SOLVED: To reduce musical noise even if a signal becomes deficient after decoding because of the lack of the number of necessary bits is not large enough.SOLUTION: An encoding method includes an error calculation step of obtaining an error signal from the absolute value of a first quantization signal and a quantization normalization value when the value of a first quantization signal is 0, and calculating an error signal from the absolute value of the first signal to be encoded and the absolute value of the first quantization signal when the value of the first quantization signal is not 0. The encoding method includes an error correction step of multiplying a calculation result using weighted addition of a decoding quantization normalization value and a second decoded quantization signal by 1 or -1 generated at random when the value of the first decoded quantization signal is 0, and determining the multiplication result as a decoded signal. When the value of the first decoded quantization signal is not 0, a calculation result using the sum of the first decoded quantization signal and the second decoded quantization signal is determined as a decoded signal.
摘要翻译：要解决的问题：即使在由于缺少必需比特数不足而导致解码后的信号不足的情况下也可以减少音乐噪声。解码：编码方法包括从绝对值获取误差信号的误差计算步骤当第一量化信号的值为0时，第一量化信号的值和量化归一化值，并且当值被编码的第一信号的绝对值和第一量化信号的绝对值时计算误差信号，所述编码方法包括纠错步骤，当将所述第一量化信号的值与所述第一量化信号的值相乘时，使用随机生成的解码量化归一化值和第二解码量化信号的加权相加乘以1或-1的计算结果第一解码量化信号为0，并将相乘结果确定为解码信号。当第一解码量化信号的值不为0时，使用第一解码量化信号和第二解码量化信号的和的计算结果被确定为解码信号。

26. 发明专利

JP2011009845A Multipoint connection device, and multipoint connection method 有权
标题翻译：多点连接装置和多点连接方法
公开(公告)号：JP2011009845A
公开(公告)日：2011-01-13
申请号：JP2009148755
申请日：2009-06-23
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： OMURO NAKA , HIWAZAKI YUUSUKE , SASAKI SHIGEAKI
IPC分类号： H04M3/56 , G10L19/00
摘要： PROBLEM TO BE SOLVED: To provide a multipoint connection technique with little sound quality degradation.SOLUTION: Respective sound packets sent from respective points are divided into sub-frame length units shorter than a packetizing cycle to output divided sound packets, and G.711 bits and expansion bits are taken out from the respective divided sound packets. The respective G.711 bits are decoded to output sound signals, the sound signals are mixed to output mixed sound signals for the respective points, and the mixed sound signals are respectively encoded to output mixed sound codes. Also, an utterance point is determined from the respective spots, a control signal corresponding to the utterance point is output, and the expansion bit determined corresponding to the control signal among the expansion bits corresponding to the respective points is output for the point determined corresponding to the control signal among the respective points. The mixed sound code and the expansion bit are connected, the unit sound packet of the sub-frame length unit is output, the plurality of unit sound packets are connected and the sound packet for transmission having the time unit of the packetizing cycle is output.
摘要翻译：要解决的问题：提供几乎没有声音质量下降的多点连接技术。解决方案：从各个点发送的各个声音分组被划分为比打包周期短的子帧长度单位，以输出分离的声音包，并且G.711位并且从相应的分离的声音包中取出扩展位。各个G.711位被解码以输出声音信号，混合声音信号以输出各个点的混合声音信号，混合声音信号被分别编码以输出混合声音代码。此外，从各个点确定发声点，输出与发音点对应的控制信号，并且输出与对应于各个点的扩展位之间对应于控制信号确定的扩展位，各点之间的控制信号。输出混合声码和扩展位，输出子帧长度单位的单位声音包，连接多个单位声音包，并输出具有打包周期的时间单位的用于发送的声音包。

27. 发明专利

JP2008289085A Decoding method, decoder, decoding apparatus, encoding method, encoder, program and recording medium 有权
标题翻译：解码方法，解码器，解码设备，编码方法，编码器，程序和记录介质
公开(公告)号：JP2008289085A
公开(公告)日：2008-11-27
申请号：JP2007134457
申请日：2007-05-21
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： HIWAZAKI YUUSUKE , OMURO NAKA , MORI TAKESHI , KATAOKA AKITOSHI , SASAKI SHIGEAKI
IPC分类号： H03M7/30 , G10L19/00
摘要： PROBLEM TO BE SOLVED: To provide a decoding technology and an encoding technology for satisfying the maintenance of encoding quality and reduction in computational complexity in encoding while reducing a memory capacity to be used. SOLUTION: This decoding method includes an spreading code decomposing step, a weighted form decoding step, a weighting removal calculating step, a gain decoding step and a multiplication step. In the spreading code decomposing step, an input code is decomposed into a form code and a gain code. In the weighted form decoding step, a weighted form code book is used to convert the form code into a weighted form vector. In the weighting removal calculating step, a weight of the weighted form vector is removed and a form vector is outputted. In the gain decoding step, a gain code book is used to convert the gain code into a gain. In the multiplication step, the form vector and the gain are multiplied to output a decoded signal. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种解码技术和编码技术，用于满足编码质量的维护和降低编码中的计算复杂度，同时减少要使用的存储器容量。解决方案：该解码方法包括扩展码分解步骤，加权形式解码步骤，加权去除计算步骤，增益解码步骤和乘法步骤。在扩展代码分解步骤中，输入代码被分解为表单代码和增益代码。在加权形式解码步骤中，使用加权形式代码簿将表单代码转换为加权形式向量。在加权去除计算步骤中，去除加权形式矢量的权重，并输出形式向量。在增益解码步骤中，使用增益码本将增益码转换为增益。在乘法步骤中，相乘形式向量和增益以输出解码信号。版权所有（C）2009，JPO＆INPIT

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