公开(公告)号：US20050125683A1

公开(公告)日：2005-06-09

申请号：US10985729

申请日：2004-11-10

申请人： Shinako Matsuyama ,  Kenzo Akagiri ,  Koji Suginuma

发明人： Shinako Matsuyama ,  Kenzo Akagiri ,  Koji Suginuma

IPC分类号： G06F12/14 ,  G06F12/00 ,  G06F13/00 ,  G06F17/00 ,  G06F17/30 ,  G06F19/00 ,  G06F21/62 ,  G06Q10/00 ,  G06Q30/02 ,  G06Q30/06 ,  G06Q50/00 ,  G09C1/00 ,  G10L19/00 ,  H04L9/00 ,  H04L9/08 ,  H04L9/32 ,  H04L29/06

CPC分类号： H04L63/0428 ,  G06F21/33 ,  G06F21/606 ,  G06F21/6245 ,  G06F2221/2107 ,  G06F2221/2149 ,  H04L2463/062

摘要： It is envisaged to relieve the load imposed on the authentication processing as anonymity is maintained to prevent the leakage of the private information, such as taste information of a user. In an information acquisition system 1, a storage server 2 encrypts contents data and other information provided, in their entirety, using a common cipher key for data encryption DEK, and stores the encrypted information as encrypted data EN (DATA). The storage server 2 further encrypts the cipher key for data encryption DEK, as the key information of the encrypted data EN (DEK), using cipher key data KEK, and publicizes the encrypted data EN (DATA), encrypted with the cipher key for encryption DEK, and the encrypted key data EN (DEK), encrypted with the cipher key data KEK. An information processing terminal 3 encrypts the retrieval key word, by the cipher key data KEK, received from the management server 4, and retrieves the encrypted data EN (DATA), stored in the storage server 2, by the encrypted retrieval keyword EN (REF).

摘要翻译： 设想为了防止私人信息的泄露（例如用户的品味信息）而保持匿名性，减轻了对认证处理的负担。 在信息获取系统1中，存储服务器2使用用于数据加密DEK的公用密码密钥整体地提供内容数据和其他信息，并将加密信息存储为加密数据EN（DATA）。 存储服务器2使用加密密钥数据KEK进一步加密用于数据加密DEK的加密密钥作为加密数据EN（DEK）的密钥信息，并且公开用加密密钥加密的加密数据EN（DATA） DEK和加密密钥数据EN（DEK），用加密密钥数据KEK加密。 信息处理终端3通过从管理服务器4接收到的加密密钥数据KEK对检索关键字进行加密，并通过加密检索关键字EN（REF）检索存储在存储服务器2中的加密数据EN（DATA） ）。

公开(公告)号：US06415251B1

公开(公告)日：2002-07-02

申请号：US09254766

申请日：1999-06-03

申请人： Yoshiaki Oikawa ,  Mitsuyuki Hatanaka ,  Kenzo Akagiri

发明人： Yoshiaki Oikawa ,  Mitsuyuki Hatanaka ,  Kenzo Akagiri

IPC分类号： G10L1902

CPC分类号： H04B1/667 ,  G10L19/0208 ,  H04B1/665

摘要： If all original subbands are not selected for processing in conventional subband coders or decoders aliasing distortion is generated by the characteristics of their subband band-splitting filters or subband band synthesis filters. To improve sound quality in a subband decoder the decoded frequency components in the overlap region adjacent to a subband selected not to be decoded are band-limited prior to synthesis. Alternatively, in a subband coder the sound quality in a processed subband adjacent to one not to be coded is improved by band-limiting the filtering frequency overlap region between these subbands prior to coding. By thus decoding only the non-overlapping part of the subband adjacent to an omitted subband signal distortion is reduced.

摘要翻译： 如果所有原始子带未被选择用于常规子带编码器或解码器中的处理，则通过其子带分束滤波器或子带合成滤波器的特性产生混叠失真。 为了提高子带解码器中的声音质量，在合成之前对被选择不被解码的子带相邻的重叠区域中的解码频率分量进行频带限制。 或者，在子带编码器中，通过在编码之前对这些子带之间的滤波频率重叠区进行频带限制，来改善与未被编码的一个相邻的处理子带中的声音质量。 通过这样解码，只有与省略的子带信号失真相邻的子带的非重叠部分被减少。

公开(公告)号：US5583967A

公开(公告)日：1996-12-10

申请号：US78547

申请日：1993-06-16

申请人： Kenzo Akagiri

发明人： Kenzo Akagiri

IPC分类号： H03M7/30 ,  H03G7/00 ,  H04B1/64 ,  H04B1/66 ,  G10L3/02 ,  G10L9/00

CPC分类号： H03G7/007 ,  H04B1/665

摘要： An apparatus for compressing a digital audio input signal to provide a compressed output signal. A circuit derives plural spectral coefficients from the input signal and groups the spectral coefficients into bands. A distributing circuit distributes a total available number of quantizing bits between signal spectrum-dependent quantizing bits and noise spectrum-dependent quantizing bits. A circuit determines a magnitude for each band, and, in response thereto, allocates the signal spectrum-dependent quantizing bits among the bands. This allocates to each band a number of signal spectrum-dependent quantizing bits for quantizing each spectral coefficient in the band. A circuit determines a subjectively-allowable noise spectrum and, in response thereto, allocates the noise spectrum-dependent quantizing bits among the bands. This allocates to each band a number of noise spectrum-dependent quantizing bits for quantizing each spectral coefficient in the band. A quantizing circuit quantizes the spectral coefficients in each band using a total number of quantizing bits determined by summing the number of signal spectrum-dependent quantizing bits allocated to the band and the number of noise spectrum-dependent quantizing bits allocated to the band. The distribution circuit sets the distribution ratio in response to a circuit that calculates the smoothness of the spectrum of the input signal. In this manner, optimum quantizing for both musical signals and single sine wave signals are given by a single processing operation, without the need to repeatedly adjust the quantizing bit allocation.

摘要翻译： 一种用于压缩数字音频输入信号以提供压缩输出信号的装置。 电路从输入信号中导出多个频谱系数，并将频谱系数分组成频带。 分配电路在信号频谱相关量化位和噪声谱相关量化位之间分配总可用数量的量化位。 电路确定每个频带的幅度，并且响应于此，在频带中分配信号频谱相关的量化比特。 这为每个频带分配了许多信号频谱相关的量化比特，用于量化频带中的每个频谱系数。 电路确定主观上允许的噪声频谱，并且响应于此，在频带中分配噪声谱相关的量化比特。 这为每个频带分配了许多噪声频谱相关的量化比特，用于量化频带中的每个频谱系数。 量化电路使用通过对分配给该频带的信号频谱相关量化位数的数量和分配给该频带的噪声频谱相关量化位的数量相加确定的量化比特的总数量来量化每个频带中的频谱系数。 分配电路响应于计算输入信号的频谱的平滑度的电路来设置分配比。 以这种方式，通过单个处理操作来给出音乐信号和单个正弦波信号的最佳量化，而不需要重复地调整量化比特分配。

公开(公告)号：US5563913A

公开(公告)日：1996-10-08

申请号：US142873

申请日：1993-10-28

申请人： Kenzo Akagiri ,  Makoto Akune

发明人： Kenzo Akagiri ,  Makoto Akune

IPC分类号： G10L21/02 ,  G10L19/00 ,  H03G7/00 ,  H03M7/30 ,  H04B1/66 ,  H04B14/04 ,  H04R3/04

CPC分类号： H03G7/007 ,  H04B1/665

摘要： An apparatus and method for processing an input digital signal in which an input digital audio signal at an input terminal 11 is supplied via a one-block delay unit 17 to a difference unit 20, an output of which is processed by noise-shaping circuit 21 and restored by a near-instantaneous compressor 26, a near-instantaneous expander 27 and an accumulator 28 so as to be fed back to the difference unit 20 to find a difference between a signal of a directly preceding sample and a signal of the current sample. The noise shaping circuit 21 modifies the spectrum of the quantization noise by taking aural characteristics, such as equal-loudness characteristics or masking characteristics, into account for diminishing the level of the quantization noise as perceived by the ear. The noise level as perceived may be reduced in a manner desirable for the sound quality without changing the existing format.

摘要翻译： 一种用于处理输入数字信号的装置和方法，其中输入端子11处的输入数字音频信号经由一块延迟单元17提供给差分单元20，差分单元20的输出由噪声整形电路21 并由近瞬时压缩机26，近瞬时扩展器27和累加器28恢复，以反馈到差分单元20，以找到直接在线样本的信号与当前样本的信号之间的差异 。 噪声整形电路21通过采用诸如等响度特性或掩蔽特性之类的听觉特性来改变量化噪声的频谱，以减少由耳朵感知的量化噪声的电平。 可以以不改变现有格式的声音质量的方式来减少感知到的噪声水平。

公开(公告)号：US5548574A

公开(公告)日：1996-08-20

申请号：US205319

申请日：1994-03-03

申请人： Osamu Shimoyoshi ,  Kenzo Akagiri ,  Hiroshi Suzuki ,  Makoto Mitsuno

发明人： Osamu Shimoyoshi ,  Kenzo Akagiri ,  Hiroshi Suzuki ,  Makoto Mitsuno

IPC分类号： G10L19/02 ,  G11B20/00 ,  G11B20/10 ,  H03G9/02 ,  H03M7/30 ,  H04B1/66 ,  G11B7/00

CPC分类号： G11B20/00007 ,  G10L19/0208 ,  G10L19/022 ,  G11B20/10527 ,  H03G9/025 ,  H04B1/665

摘要： Methods and apparatus for recording, reproducing, transmitting and/or receiving compressed data, and a recording medium therefor, utilize frequency dividing filters for dividing the frequency range of digital signals into plural frequency bands, orthogonal transform circuits for producing signal components in plural two-dimensional blocks along time and frequency, an adaptive bit allocation and encoding circuit for quantizing and compressing the information for each two-dimensional block and a bit allocation and calculating circuit. When recording the information together with information compressing parameters for each two-dimensional block, the information compressing parameters for at least two two-dimensional blocks are recorded collectively to avoid complicacy in the structure of the sampling frequency signal generating circuits or the like otherwise caused in case of providing plural sampling frequencies as well as to prevent an increase in hardware scale.

摘要翻译： 用于记录，再现，发送和/或接收压缩数据的方法和装置及其记录介质利用分频滤波器将数字信号的频率范围分成多个频带，用于产生多个二维信号的信号分量的正交变换电路， 时间和频率的三维块，用于量化和压缩每个二维块的信息的自适应位分配和编码电路以及位分配和计算电路。 当将信息与每个二维块的信息压缩参数一起记录时，集中记录至少两个二维块的信息压缩参数，以避免在采样频率信号发生电路等的结构中复杂化 提供多个采样频率以及防止硬件规模增加的情况。

公开(公告)号：US5301205A

公开(公告)日：1994-04-05

申请号：US011376

申请日：1993-01-29

申请人： Kyoya Tsutsui ,  Kenzo Akagiri

发明人： Kyoya Tsutsui ,  Kenzo Akagiri

IPC分类号： H03H17/02 ,  G11B20/00 ,  G11B20/10 ,  H03M7/30 ,  H04B1/66 ,  H04K1/00

CPC分类号： H04B1/665 ,  G11B20/00007 ,  G11B20/10527

摘要： A data compression apparatus for compressing a digital input signal to provide a compressed digital output signal. In the apparatus, a circuit derives plural spectral coefficients from the digital input signal, and groups the spectral coefficients into bands. An adaptive bit allocation circuit adaptively allocates a number of spectrum-dependent quantizing bits among the bands to allocate to each band a number of spectrum-dependent quantizing bits for quantizing each of the spectral coefficients in the band. The number of spectrum-dependent quantizing bits allocated to each band by the adaptive bit allocation circuit is determined according to the band magnitude, weighted depending on the band frequency.

摘要翻译： 一种用于压缩数字输入信号以提供压缩数字输出信号的数据压缩装置。 在该装置中，电路从数字输入信号中导出多个频谱系数，并将频谱系数分组成频带。 自适应位分配电路自适应地分配频带中的多个频谱相关量化比特，以向每个频带分配多个频谱相关量化比特，用于量化频带中的每个频谱系数。 由自适应位分配电路分配给每个频带的频谱相关量化位的数量根据根据频带频率加权的频带幅度来确定。

公开(公告)号：US5299239A

公开(公告)日：1994-03-29

申请号：US9574

申请日：1993-01-26

申请人： Naoto Iwahashi ,  Masayuki Nishiguchi ,  Makoto Akune ,  Kenzo Akagiri ,  Yoshihito Fujiwara

发明人： Naoto Iwahashi ,  Masayuki Nishiguchi ,  Makoto Akune ,  Kenzo Akagiri ,  Yoshihito Fujiwara

IPC分类号： H03M7/30 ,  H04B1/66

CPC分类号： H03M7/3053

摘要： A signal encoding apparatus for cutting out blocks of an input signal waveform at a predetermined time interval and converting the in-block signal by mutually independent conversion axes for encoding, wherein the waveform cutting block length along the time axis is changed according to the input signal.

摘要翻译： 一种信号编码装置，用于以预定的时间间隔切出输入信号波形的块，并通过相互独立的编码转换轴转换块内信号，其中沿着时间轴的波形切割块长度根据输入信号而改变 。

公开(公告)号：US5260980A

公开(公告)日：1993-11-09

申请号：US747806

申请日：1991-08-20

申请人： Kenzo Akagiri ,  Kyoya Tsutsui

发明人： Kenzo Akagiri ,  Kyoya Tsutsui

IPC分类号： G10L19/02 ,  H03M7/30 ,  H04B1/66

CPC分类号： H03M7/3053 ,  H04B1/665

摘要： An apparatus for encoding an input digital signal divides the input digital signal to produce frequency components of increasing bandwidth as the frequency increases, performs blocking on each of the frequency components to produce blocks of decreasing time length as the frequency increases, performs a fast Fourier transformation on each block and quantizes each block using a quantization characteristic set in accordance with a comparison of the energy of each frequency component in each block with a masking spectrum. The masking spectrum includes both a masking effect on the frequency base of the input signal and masking effect on the time base of the input signal and may further include effects of the minimum audible curve of the human hearing sense characteristic. Utilization of both the temporal and frequency masking effects permits reduction in the bit rate of the encoded signal using real time processing and without deterioration in sound quality.

公开(公告)号：US4972164A

公开(公告)日：1990-11-20

申请号：US211553

申请日：1988-06-23

申请人： Kenzo Akagiri ,  Tomoko Sato

发明人： Kenzo Akagiri ,  Tomoko Sato

IPC分类号： G11B20/00 ,  H03G7/00

CPC分类号： H03G7/007 ,  G11B20/00007

摘要： In an amplitude expanding/compressing circuit for expanding, compressing, or expanding and compressing an amplitude of an input signal, the following are provided:a control signal generator which receives an input signal and generates a control signal from said input signal;a signal multiplier for multiplying the control signal and the input signal to generate a multiplied output;a first subtracter for subtracting the input signal from the multiplied output to generate a first subtracter output signal;a signal processor which receives the first subtracter output signal and generates a processed output from said first subtracter output; anda second subtracter for subtracting the processed output from the multiplied output to obtain an amplitude expanded, amplitude compressed, or amplitude expanded and compressed output signal.

公开(公告)号：US4797902A

公开(公告)日：1989-01-10

申请号：US905391

申请日：1986-08-29

申请人： Masayuki Nishiguchi ,  Kenzo Akagiri

发明人： Masayuki Nishiguchi ,  Kenzo Akagiri

IPC分类号： H03M7/30 ,  H04B14/04

CPC分类号： H03M7/3053

摘要： A digital signal transmission device in which input digital signals consisting of a train of words that are continuous in time are formed into a block every after a predetermined number of words, and the block is transmitted through the so-called encode filter consists of a plurality of filters made up of an estimating unit of N-th degree and an estimating unit of a degree smaller than the N-th degree. Maximum absolute values in the blocks produced from the filters or maximum absolute values multiplied by coefficients are compared with one another, and by selecting a filter which minimizes the value, the input digital signals can be transmitted through filters that provide the greatest efficiency for each of the blocks, e.i., that produce the least estimated errors.

摘要翻译： PCT No.PCT / JP85 / 00721。 一九八六年八月二十九日 102（e）日期1986年8月29日PCT提交1985年12月26日PCT公布。 出版物WO86 / 04198 日期：1986年7月17日。一种数字信号传输装置，其中由时间上连续的字串组成的输入数字信号每隔一定数量的字形成一个块，并且该块通过所谓的“ 所谓的编码滤波器由多个由N次估计单元组成的滤波器和小于N次的估计单元组成。 将从滤波器产生的块中的最大绝对值或最大绝对值乘以系数进行比较，并且通过选择使该值最小化的滤波器，可以通过滤波器传输输入数字信号，该滤波器为每个滤波器提供最大的效率 块，ei，产生最少的估计误差。