公开(公告)号：US20120039397A1

公开(公告)日：2012-02-16

申请号：US13281002

申请日：2011-10-25

申请人： Hiroshi IKEDA ,  Shuji Miyasaka

发明人： Hiroshi IKEDA ,  Shuji Miyasaka

IPC分类号： G10L21/00 ,  H04N7/26

CPC分类号： H04N5/783 ,  G10L25/78 ,  H04N5/93 ,  H04N21/4325 ,  H04N21/4394 ,  H04N21/4402

摘要： A digital signal reproduction device includes an audio decoder configured to decode an audio bit stream to output a resulting audio signal, an audio bit stream analyzer configured to analyze whether or not the audio bit stream contains human voice, a playback speed determiner configured to determine a playback speed based on a result of the analysis by the audio bit stream analyzer, and a variable speed reproducer configured to receive the audio signal and reproduce an audio signal corresponding to the playback speed determined by the playback speed determiner.

摘要翻译： 一种数字信号再现装置，包括：音频解码器，被配置为对音频比特流进行解码以输出所得到的音频信号;音频比特流分析器，被配置为分析音频比特流是否包含人声;回放速度确定器， 基于音频比特流分析器的分析结果的播放速度以及被配置为接收音频信号并再现与由重放速度确定器确定的播放速度相对应的音频信号的可变速度再现器。

公开(公告)号：US09153241B2

公开(公告)日：2015-10-06

申请号：US12438996

申请日：2007-11-29

申请人： Shuji Miyasaka ,  Michihiro Matsumoto

发明人： Shuji Miyasaka ,  Michihiro Matsumoto

IPC分类号： H04W4/00 ,  G10L19/16 ,  G10L21/038 ,  H04Q11/04 ,  G11B20/00

CPC分类号： G10L19/167 ,  G10L21/038 ,  G11B2020/00028 ,  H04Q11/0428

摘要： The signal processing apparatus inserts the header information in a frame to probably be the reproduction start point by including: the first and the second coding units that code an input signal per frame; the first header inserting unit that inserts the SBR header indicating management information of the coded signal represented by a sequence of frames, in each frame at a regular interval within the coded signal; the control unit that determines a frame in which the SBR header is inserted, independent of the frames in which the first header inserting unit inserts the SBR header; and the second header inserting unit that singly inserts the SBR header in the frame determined by the control unit.

摘要翻译： 信号处理装置通过包括以下步骤将头部信息插入到可能是再现开始点的帧中：第一和第二编码单元，每帧编码输入信号; 第一标题插入单元，以编码信号内的规则间隔，插入表示由帧序列表示的编码信号的管理信息的SBR标题; 所述控制单元确定其中插入所述SBR报头的帧，与所述第一报头插入单元插入所述SBR报头的帧无关; 以及第二标题插入单元，其将SBR标题单独地插入由控制单元确定的帧中。

公开(公告)号：US08081764B2

公开(公告)日：2011-12-20

申请号：US11993066

申请日：2006-07-11

申请人： Yosiaki Takagi ,  Kok seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

发明人： Yosiaki Takagi ,  Kok seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

IPC分类号： H04R5/00

CPC分类号： G10L19/008 ,  G10L19/0204

摘要： Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder (102) and an analysis filter bank (110) which generate, from a coded down-mixed signal, the first frequency band signal (x) corresponding to a down-mixed signal (M); a channel expansion unit (130) which converts the first frequency band signal (x) generated by the analysis filter bank (110) into output signals (y) corresponding to respective audio signals of N channels, using BC information; an synthesis filter bank (140) which performs band synthesis for the output signals (y) generate by the channel expansion unit (130) and thereby converts the output signals (y) into the respective audio signals of the N channels on a time axis; and an aliasing noise detection unit (120) which detects occurrence of aliasing noise in the first frequency band signal (x). The channel expansion unit (130) further prevents the aliasing noise from being included in the output signals (y), based on information detected by the aliasing noise detection unit (120).

摘要翻译： 提供一种音频解码器，其可以在抑制混叠噪声的发生的同时减少算术运算量。 音频解码器包括：解码器（102）和分析滤波器组（110），其从编码的下变频信号产生与下混合信号（M）对应的第一频带信号（x）; 信道扩展单元，其使用BC信息将由分析滤波器组（110）生成的第一频带信号（x）转换成对应于N个信道的各个音频信号的输出信号（y）; 合成滤波器组（140），其对由所述信道扩展单元（130）生成的输出信号（y）进行频带合成，从而将输出信号（y）转换成时间轴上的N个信道的各个音频信号; 以及用于检测第一频带信号（x）中的混叠噪声的出现的混叠噪声检测单元（120）。 信道扩展单元（130）还基于混叠噪声检测单元（120）检测到的信息进一步防止混叠噪声包含在输出信号（y）中。

公开(公告)号：US08019614B2

公开(公告)日：2011-09-13

申请号：US12065378

申请日：2006-08-31

申请人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono ,  Tomokazu Ishikawa

发明人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono ,  Tomokazu Ishikawa

IPC分类号： G10L19/00

CPC分类号： G10L19/26 ,  G10L19/008 ,  G10L19/0204 ,  H04S2420/03

摘要： A temporal processing apparatus includes: a splitter splitting an audio signal, included in the sub-band domain, into diffuse signals indicating reverberating components and direct signals indicating non-reverberating components; a downmix unit generating a downmix signal by downmixing the direct signals; BPFs respectively generating a bandpass downmix signal and bandpass diffuse signals; normalization processing units respectively generating a normalized downmix signal and normalized diffuse signals; a scale computation processing unit computing, on a predetermined time slot basis, a scale factor indicating the magnitude of energy of the normalized downmix signal with respect to energy of the normalized diffuse signals; a calculating unit generating scale diffuse signals; a HPF generating high-pass diffuse signals; an adding unit generating addition signals; and a synthesis filter bank performing synthesis filter processing on the addition signals and transforming the addition signals into the time domains.

摘要翻译： 时间处理装置包括：分离器，将包括在子带域中的音频信号分成指示混响分量的漫射信号和指示非混响分量的直接信号; 下混合单元，通过使直接信号下混合来产生降混信号; BPF分别产生带通下混信号和带通漫射信号; 归一化处理单元，分别产生归一化的下混信号和归一化扩散信号; 比例计算处理单元在预定时隙的基础上计算指示归一化的下混信号相对于归一化扩散信号的能量的能量的大小的比例因子; 计算单元，生成缩放漫射信号; HPF产生高通漫反射信号; 添加单元生成附加信号; 以及合成滤波器组，对加法信号执行合成滤波处理，并将加法信号转换成时域。

公开(公告)号：US20070239463A1

公开(公告)日：2007-10-11

申请号：US11806971

申请日：2007-06-05

申请人： Shuji Miyasaka ,  Tomokazu Ishikawa ,  Yoshiaki Sawada

发明人： Shuji Miyasaka ,  Tomokazu Ishikawa ,  Yoshiaki Sawada

IPC分类号： G10L19/00

CPC分类号： G10L19/18 ,  G10L19/24

摘要： A decoding device (30a) comprises a narrow-band decoding unit (31) operable to reproduce a PCM signal (P1) from a narrow-band bit stream included in a wide-band bit stream (S0), a wide-band decoding unit (32) operable to reproduce a PCM signal (P2) having a frequency band which is wider than that of the PCM signal (P1) reproduced by the narrow-band decoding unit (31) from the narrow-band bit stream and a band expanding bit stream included in the wide band bit stream (S0) and a selecting unit (34) operable to select either the PCM signal (P1) reproduced by the narrow-band decoding unit (31) or the PCM signal (P2) reproduced by the wide-band decoding unit (32), and to output the selected sound digital signal.

公开(公告)号：US07243061B2

公开(公告)日：2007-07-10

申请号：US10954589

申请日：2004-10-01

申请人： Takeshi Norimatsu ,  Shuji Miyasaka ,  Yoshihisa Nakatoh ,  Mineo Tsushima ,  Tomokazu Ishikawa

发明人： Takeshi Norimatsu ,  Shuji Miyasaka ,  Yoshihisa Nakatoh ,  Mineo Tsushima ,  Tomokazu Ishikawa

IPC分类号： G10L19/02

CPC分类号： G10L19/032 ,  G10L19/0212 ,  G10L19/038

摘要： With respect to audio signal coding and decoding apparatuses, there is provided a coding apparatus that enables a decoding apparatus to reproduce an audio signal even through it does not use all of data from the coding apparatus, and a decoding apparatus corresponding to the coding apparatus. A quantization unit constituting a coding apparatus includes a first sub-quantization unit comprising sub-quantization units for low-band, intermediate-band, and high-band; a second sub-quantization unit for quantizing quantization errors from the first sub-quantization unit; and a third sub-quantization unit for quantizing quantization errors which have been processed by the first sub-quantization unit and the second sub-quantization unit.

摘要翻译： 对于音频信号编码和解码装置，提供了一种编码装置，即使通过编码装置不使用全部数据，能够使解码装置再现音频信号，也可以使用与编码装置对应的解码装置。 构成编码装置的量化单元包括：第一子量化单元，包括用于低频带，中频带和高频带的子量化单元; 第二子量化单元，用于量化来自第一子量化单元的量化误差; 以及用于量化由第一子量化单元和第二子量化单元处理的量化误差的第三子量化单元。

公开(公告)号：US07188133B2

公开(公告)日：2007-03-06

申请号：US10405242

申请日：2003-04-03

申请人： Shuji Miyasaka ,  Tomokazu Ishikawa

发明人： Shuji Miyasaka ,  Tomokazu Ishikawa

IPC分类号： G06F7/487

CPC分类号： G06F7/4876 ,  G06F2207/3824

摘要： In order to provide a method or the like for storing floating point numbers to make it easier to manage the floating point numbers using a fixed point processor, when a real number x is represented by a*(2^n) where a mantissa is a and an exponent is n, the mantissa is stored as a fixed point number in the upper U bits of N-bit field (N≧(U+L)) and the exponent is stored as an integer in the lower L bits. For the multiplication of two real numbers represented in such a format, these two real numbers are multiplied as fixed point numbers so as to make only the upper significant bits of the multiplication result a mantissa, while these two real numbers are added as integers so as to make only the lower significant bits of the addition result an exponent. As a result, the multiplication result can be obtained in a floating point format.

摘要翻译： 为了提供用于存储浮点数的方法等以使得使用固定点处理器更容易地管理浮点数，当实数x由*（2 ^ n）表示时，其中尾数为 并且指数为n，尾数作为固定点数存储在N位字段（N> =（U + L））的高U位中，并且指数作为整数存储在较低的L位中。 对于以这种格式表示的两个实数的乘法，将这两个实数乘以固定点数，以便仅使乘法结果的高有效位为尾数，而将这两个实数作为整数相加，以便 以使相加结果的较低有效位成为指数。 结果，可以以浮点格式获得乘法结果。

公开(公告)号：US06826526B1

公开(公告)日：2004-11-30

申请号：US09171266

申请日：1999-07-23

申请人： Takeshi Norimatsu ,  Shuji Miyasaka ,  Yoshihisa Nakato ,  Mineo Tsushima ,  Tomokazu Ishikawa

发明人： Takeshi Norimatsu ,  Shuji Miyasaka ,  Yoshihisa Nakato ,  Mineo Tsushima ,  Tomokazu Ishikawa

IPC分类号： G10L1900

CPC分类号： G10L19/038 ,  G10L2019/0005

摘要： A coding unit codes an audio signal by using a vector quantization method to reduce the quantity of data. An audio code having a minimum distance among auditive distances between sub-vectors produced by dividing an input vector and audio codes in a transmission-side code book is selected. A portion corresponding to an element of a sub-vector having a high auditive importance is handled in an audio code selecting unit while neglecting the codes indicating phase information and subjected to comparative retrieval with respect to audio codes in a transmission-side code book. Extracted phase information corresponding to an element portion of the sub-vector is added to the result obtained and output as a code index. Thereby, the calculation amount in the code retrieval of vector quantization and the number of codes in the code book are decreased without lowering the quality of an audio signal.

摘要翻译： 编码单元通过使用矢量量化方法对音频信号进行编码以减少数据量。 选择具有通过划分输入向量和发送侧码本中的音频码产生的子向量之间的听觉距离之间的最小距离的音频码。 在音频代码选择单元中处理对应于具有高听觉重要性的子向量的元素的部分，同时忽略指示相位信息的代码，并且对发送侧代码簿中的音频代码进行比较检索。 对应于子向量的元素部分的提取相位信息被添加到获得的结果并作为代码索引输出。 由此，在不降低音频信号的质量的情况下，减少矢量量化的代码检索和码本中的代码数量的计算量。

公开(公告)号：US06678653B1

公开(公告)日：2004-01-13

申请号：US09657461

申请日：2000-09-07

申请人： Mineo Tsushima ,  Takeshi Norimatsu ,  Shuji Miyasaka

发明人： Mineo Tsushima ,  Takeshi Norimatsu ,  Shuji Miyasaka

IPC分类号： G10L1902

CPC分类号： G10L19/035 ,  G10L19/0204

摘要： An audio signal is converted from time domain into frequency conversion signal, and is coded at high speed. In order that the frequency information decoded by using the quantizing data may not be zero when the frequency conversion signal is quantized, the guarantee value K(B) of the quantizing precision is calculated. The relative quantizing precision SF(B) in each band and the quantizing precision information Com common to all bands are determined, and final quantizing precision information ASF(B) are calculated by these values, and the frequency conversion signal is quantized in the quantizing unit. Thus, it is possible to quantize by a single quantizing loop, only on the restricting condition of assuring the minimum quantizing information.

摘要翻译： 音频信号从时域转换为变频信号，并以高速编码。 为了使量化数据解码的频率信息在变频信号被量化时可能不为零，计算量化精度的保证值K（B）。 确定每个频带中的相对量化精度SF（B）和所有频带共同的量化精度信息Com，并且通过这些值计算最终量化精度信息ASF（B），并且在量化单元中量化频率转换信号 。 因此，只有在确保最小量化信息的限制条件下，可以通过单个量化循环来量化。

公开(公告)号：US06363407B1

公开(公告)日：2002-03-26

申请号：US09929156

申请日：2001-08-14

申请人： Shuji Miyasaka ,  Takeshi Fujita ,  Masahiro Sueyoshi ,  Akihisa Kawamura ,  Masaharu Matsumoto ,  Takashi Katayama ,  Kazutaka Abe ,  Kosuke Nishio

发明人： Shuji Miyasaka ,  Takeshi Fujita ,  Masahiro Sueyoshi ,  Akihisa Kawamura ,  Masaharu Matsumoto ,  Takashi Katayama ,  Kazutaka Abe ,  Kosuke Nishio

IPC分类号： G06F738

CPC分类号： G06F7/552 ,  G10L19/0212

摘要： A device of the present invention is an exponential calculation device for calculating x{circumflex over ( )}(a/b) (where a and b are each an integer constant) for a given input value of x. The device includes: an input control section for outputting a value of x′, wherein x′=x when x≦A (where A is a threshold value within a variable range of x) and x′=x/2{circumflex over ( )}b when x>A; a core section for outputting a value of z′=x′{circumflex over ( )}(a/b); and an output control section for outputting a value of z, wherein z=z′ when x≦A and z=z′*2{circumflex over ( )}a when x>A.

摘要翻译： 本发明的装置是用于为x的给定输入值计算x {circumflex over（）}（a / b）（其中a和b各自为整数常数）的指数计算装置。 该装置包括：用于输出x'的值的输入控制部分，其中当x <= A时，x'= x（其中A是x的可变范围内的阈值），x'= x / 2 （）} b当x> A时; 用于输出z'= x'{circumflex over（）}（a / b）的值的核心部分; 以及输出控制部分，用于输出z的值，其中当x> A时z = z'，当x> A时，z = z'* 2 {circumflex over（）} a。