公开(公告)号：US09881625B2

公开(公告)日：2018-01-30

申请号：US14008732

申请日：2012-03-12

申请人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

发明人： Zongxian Liu ,  Kok Seng Chong ,  Masahiro Oshikiri

IPC分类号： G10L19/032 ,  G10L19/02 ,  G10L19/00

CPC分类号： G10L19/032 ,  G10L19/0017 ,  G10L19/0208 ,  G10L19/0212

摘要： In this invention, the design of the Huffman table can be done offline with a large input sequence database. The range of the quantization indices (or differential indices) for Huffman coding is identified. For each value of range, all the input signal which have the same range will be gathered and the probability distribution of each value of the quantization indices (or differential indices) within the range is calculated. For each value of range, one Huffman table is designed according to the probability. And in order to improve the bits efficiency of the Huffman coding, apparatus and methods to reduce the range of the quantization indices (or differential indices) are also introduced.

公开(公告)号：US09514757B2

公开(公告)日：2016-12-06

申请号：US13882750

申请日：2011-10-17

申请人： Masahiro Oshikiri ,  Hiroyuki Ehara

发明人： Masahiro Oshikiri ,  Hiroyuki Ehara

IPC分类号： H04R5/00 ,  G10L19/008 ,  G10L19/22

CPC分类号： G10L19/008 ,  G10L19/22

摘要： A stereo signal encoding device is provided that enables a lower bitrate without decreasing quality when applying an intermittent transmission technique to a stereo signal. A stereo encoding unit generates first stereo encoded data by encoding the stereo signal when the stereo signal of the current frame is an audio section. A stereo DTX encoding unit is a means for encoding the stereo signal when the stereo signal of the current frame is a non-audio section. The stereo DTX encoding unit generates second stereo encoded data by encoding each of a monaural signal spectral parameter that is a spectral parameter of a monaural signal generated using the first channel signal and the second channel signal, first channel signal information relating to the first channel signal, and second channel signal information relating to the second channel signal.

摘要翻译： 提供一种立体声信号编码装置，当将间歇传输技术应用于立体声信号时，能够实现较低的比特率而不降低质量。 当当前帧的立体声信号是音频部分时，立体声编码单元通过对立体声信号进行编码来产生第一立体声编码数据。 立体声DTX编码单元是当当前帧的立体声信号是非音频部分时对立体声信号进行编码的装置。 立体声DTX编码单元通过对作为使用第一声道信号和第二声道信号产生的单声道信号的频谱参数的单声道信号频谱参数进行编码，生成第二立体声编码数据，与第一声道信号有关的第一声道信号信号 ，以及与第二信道信号相关的第二信道信号信息。

公开(公告)号：US09508356B2

公开(公告)日：2016-11-29

申请号：US13641493

申请日：2011-04-01

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/00 ,  G10L19/24 ,  G10L19/038 ,  G10L13/00 ,  G10L21/00 ,  H04W4/00 ,  H04N7/12

CPC分类号： G10L19/24 ,  G10L19/038 ,  G10L2019/0006

摘要： An encoding device is provided for improving decoded signal quality. A local search unit conducts a local search on a plurality of sub-bands generated by dividing spectrum data, and calculates lattice vectors for the spectra in the plurality of sub-bands. A multi-rate indexing unit uses the lattice vectors to perform multi-rate indexing on each of the sub-bands, and generates indexing information showing the results thereof. A band selection unit determines certain sub-bands from amongst the plurality of sub-bands in a plurality of encoding layers as perceptually important sub-band groups, where these are: within a selection range of sub-bands wherein the total number of encoding bits allocated to each of the plurality of sub-bands in the indexing information is equal to or less than an already set value, and within a sub-band selection range with the highest total energy of each of the plurality of sub-bands.

摘要翻译： 提供了一种用于改善解码信号质量的编码装置。 本地搜索单元对通过分割频谱数据产生的多个子带进行局部搜索，并计算多个子带中的频谱的格子向量。 多速率索引单元使用格子向量在每个子带上执行多速率索引，并且生成表示其结果的索引信息。 频带选择单元确定多个编码层中的多个子频带中的某些子频带是感知上重要的子频带组，其中，它们是：在子频带的选择范围内，其中编码比特的总数 在索引信息中分配给多个子带中的每一个的分配带宽等于或小于已经设定的值，并且在多个子带中的每个子带的总能量最高的子带选择范围内。

公开(公告)号：US09384749B2

公开(公告)日：2016-07-05

申请号：US14238041

申请日：2012-08-24

申请人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

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： By copying to a high-frequency band portion (extension band) a low-frequency band portion in which peaking has been set to a sufficiently low state, this encoding device is capable of preventing generation of a spectrum with overly high peaking in the high-frequency band portion, and of generating a high-quality extension band spectrum. This device comprises: a maximum value search unit which searches, in each of multiple sub-bands obtained by dividing the low-frequency band portion of an audio signal and/or music signal below a prescribed frequency, for the maximum value of the amplitude of a first spectrum obtained by decoding first encoded data, which is encoded data in the low-frequency band portion; and an amplitude normalization unit which obtains a normalized spectrum by normalizing, at the maximum values of the amplitude of each sub-band, the first spectrum contained in each sub-band.

摘要翻译： 通过将峰值设定为足够低的低频区域的高频带部分（扩展频带）复制，能够防止在高频带部分 频带部分，并且产生高质量的扩展频带。 该装置包括：最大值搜索单元，其在通过将音频信号的低频带部分和/或音频信号低于规定频率的下划线获得的多个子带中搜索最大值的幅度的最大值 通过对作为低频带部分中的编码数据的第一编码数据进行解码而获得的第一频谱; 以及振幅归一化单元，其通过在每个子带的振幅的最大值处归一化包含在每个子带中的第一频谱来获得归一化频谱。

公开(公告)号：US20140122065A1

公开(公告)日：2014-05-01

申请号：US14123841

申请日：2012-05-25

申请人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

发明人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

IPC分类号： H04B1/66

CPC分类号： H04B1/667 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/24 ,  G10L21/038

摘要： A voice coding device capable of preventing overall quality degradation even when the bit rate for coding is lowered. The voice coding device codes a wide band signal in a first layer, and codes an extended band signal whose frequency band is located in higher frequency than the wide band signal in an extended band layer. An adaptive band selection unit (301) selects a frequency band to be excluded from a coding object in the extended band layer or a frequency band whose energy is to be attenuated in the extended band layer. A band-limited signal generation unit (302) excludes, within the frequency band of an input signal, the frequency band selected by the adaptive band selection unit (301) from the coding object, or attenuates the energy of the frequency band selected by the adaptive band selection unit (301).

摘要翻译： 即使当编码的比特率降低时，能够防止整体质量劣化的语音编码装置。 语音编码装置对第一层中的宽带信号进行编码，并且对扩展频带信号进行编码，其频带位于比扩频带中的宽带信号更高的频带。 自适应频带选择单元（301）从扩展频带层中的编码对象或能量在扩展频带层中衰减的频带中选择要排除的频带。 频带限制信号生成单元（302）在输入信号的频带内从编码对象排除由自适应频带选择部（301）选择的频带，或者衰减由所述编码对象选择的频带的能量 自适应频带选择单元（301）。

公开(公告)号：US08599981B2

公开(公告)日：2013-12-03

申请号：US12529212

申请日：2008-02-29

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： H04B1/10

CPC分类号： G10L19/24 ,  G10L19/26

摘要： Provided is a decoding device which suppresses generation of an abnormal sound caused by a layer switch. The decoding device includes: a first layer decoding unit (202) which performs a decoding process on first layer encoded data so as to generate a first layer decoding signal; a second layer decoding unit (203) which performs a decoding process on second layer encoded data so as to generate a first layer decoding error signal; an adder (204) which adds the first layer decoding signal and the first layer decoding error signal so as to generate a second layer decoding signal; a switching unit (205) which performs switching between the first layer signal and the second layer decoding signal for output according to layer information; and a post-filter (206) which selects a control parameter corresponding to the respective layer information and performs a control parameter smoothing process so as to generate a smoothed control parameter and performs a filter process on the decoding signal from the switching unit (205) by using the generated smoothed control parameter.

摘要翻译： 提供了抑制由层切换引起的异常声音的产生的解码装置。 解码装置包括：第一层解码单元，对第一层编码数据执行解码处理，以产生第一层解码信号; 第二层解码单元，对第二层编码数据进行解码处理，生成第一层解码误差信号; 加法器（204），其将第一层解码信号和第一层解码误差信号相加以产生第二层解码信号; 切换单元，其根据层信息执行第一层信号和第二层解码信号之间的切换以进行输出; 以及后置滤波器（206），其选择与各层信息对应的控制参数，并执行控制参数平滑处理，以产生平滑的控制参数，并对来自切换单元（205）的解码信号执行滤波处理， 通过使用生成的平滑控制参数。

公开(公告)号：US08560328B2

公开(公告)日：2013-10-15

申请号：US12518371

申请日：2007-12-14

申请人： Tomofumi Yamanashi ,  Masahiro Oshikiri

发明人： Tomofumi Yamanashi ,  Masahiro Oshikiri

IPC分类号： G10L19/00 ,  G10L11/04 ,  G01L11/06 ,  G10L15/20 ,  G10L21/04

CPC分类号： G10L19/24 ,  G10L21/038

摘要： A decoding device is capable of flexibly calculating high-band spectrum data with a high accuracy in accordance with an encoding band selected by an upper-node layer of the encoding side. In this device: a first layer decoder decodes first layer encoded information to generate a first layer decoded signal; a second layer decoder decodes second layer encoded information to generate a second layer decoded signal; a spectrum decoder performs a band extension process by using the second layer decoded signal and the first layer decoded signal up-sampled in an up-sampler so as to generate an all-band decoded signal; and a switch outputs the first layer decoded signal or the all-band decoded signal according to the control information generated in a controller.

摘要翻译： 解码装置能够根据由编码侧的上层节点选择的编码频带，以高精度灵活地计算高频带频谱数据。 在该设备中：第一层解码器解码第一层编码信息以产生第一层解码信号; 第二层解码器解码第二层编码信息以产生第二层解码信号; 频谱解码器通过使用第二层解码信号和在上采样器中被上采样的第一层解码信号来执行频带扩展处理，以便产生全频带解码信号; 并且开关根据在控制器中生成的控制信息输出第一层解码信号或全频带解码信号。

公开(公告)号：US08463602B2

公开(公告)日：2013-06-11

申请号：US11596254

申请日：2005-05-17

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G06F15/00 ,  G10L11/00 ,  G10L19/00 ,  G10L19/14

CPC分类号： G10L19/02 ,  G10L19/032 ,  G10L21/038 ,  H04B1/667

摘要： There is disclosed an encoding device capable of improving similarity between the high frequency band spectrum of the original signal and a new spectrum to be generated while realizing a low bit rate when encoding a wide-band signal spectrum. The encoding device has sub-band amplitude calculation units (122, 128) for calculating the amplitude of the respective sub-bands for the high frequency band spectrum obtained from the wide-band signal. A search unit (124) and a gain codebook (125) select some sub-bands from a plurality of sub-bands and only the gain of the selected sub-bands is subjected to encoding. An interpolation unit (126) expresses the gain of the sub-band not selected, by mutually interpolating the selected gains.

摘要翻译： 公开了一种编码装置，其能够在对宽带信号频谱进行编码时，在实现低比特率的同时，提高原始信号的高频带和要产生的新频谱之间的相似度。 编码装置具有子带幅度计算单元（122,128），用于计算从宽带信号获得的用于高频带频谱的各个子带的幅度。 搜索单元（124）和增益码本（125）从多个子带中选择一些子带，并且仅对所选子带的增益进行编码。 内插单元（126）通过相互插入所选择的增益来表示未选择的子带的增益。

公开(公告)号：US08396717B2

公开(公告)日：2013-03-12

申请号：US12088300

申请日：2006-09-29

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L21/04

CPC分类号： G10L21/038 ,  G10L19/04 ,  G10L21/02

摘要： There is provided an audio encoding device capable of maintaining continuity of spectrum energy and preventing degradation of audio quality even when a spectrum of a low range of an audio signal is copied at a high range a plurality of times. The audio encoding device (100) includes: an LPC quantization unit (102) for quantizing an LPC coefficient; an LPC decoding unit (103) for decoding the quantized LPC coefficient; an inverse filter unit (104) for flattening the spectrum of the input audio signal by the inverse filter configured by using the decoding LPC coefficient; a frequency region conversion unit (105) for frequency-analyzing the flattened spectrum; a first layer encoding unit (106) for encoding the low range of the flattened spectrum to generate first layer encoded data; a first layer decoding unit (107) for decoding the first layer encoded data to generate a first layer decoded spectrum, and a second layer encoding unit (108) for encoding.

摘要翻译： 提供了一种能够保持频谱能量的连续性并防止音频质量下降的音频编码装置，即使音频信号的低范围的频谱被多次复制在高范围。 音频编码装置（100）包括：LPC量化单元（102），用于量化LPC系数; 用于对量化的LPC系数进行解码的LPC解码单元（103） 逆滤波器单元（104），用于通过使用解码LPC系数配置的逆滤波器来平坦化输入音频信号的频谱; 用于频谱分析平坦频谱的频率区域转换单元（105）; 第一层编码单元，用于对所述平坦化频谱的低范围进行编码以产生第一层编码数据; 用于对第一层编码数据进行解码以生成第一层解码频谱的第一层解码单元（107）和用于编码的第二层编码单元（108）。

公开(公告)号：US08326606B2

公开(公告)日：2012-12-04

申请号：US11577638

申请日：2005-10-25

申请人： Masahiro Oshikiri

发明人： Masahiro Oshikiri

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/0212 ,  G10L19/022

摘要： A sound encoding device enabling the amount of delay to be kept small and the distortion between frames to be mitigated. In the sound encoding device, a window multiplication part (211) of a long analysis section (21) multiplies a long analysis frame signal of analysis length M1 by an analysis window, the resultant signal multiplied by the analysis window is outputted to an MDCT section (212), and the MDCT section (212) performs MDCT of the input signal to obtain the transform coefficients of the long analysis frame and outputs it to a transform coefficient encoding section (30). The window multiplication part (221) of a short analysis section (22) multiplies a short analysis frame signal of analysis length M2 (M2

摘要翻译： 能够使延迟量保持较小并且帧之间的失真得到缓解的声音编码装置。 在声音编码装置中，长分析部（21）的窗乘法部（211）将分析长度M1的长分析帧信号乘以分析窗，将乘以分析窗的合成信号输出到MDCT部 （212），并且MDCT部分（212）执行输入信号的MDCT以获得长分析帧的变换系数，并将其输出到变换系数编码部分（30）。 短分析部（22）的窗乘法部（221）将分析长度M2的短分析帧信号（M2