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31. 发明授权

US5530750A Apparatus, method, and system for compressing a digital input signal in more than one compression mode 失效
标题翻译：用于以多于一种压缩模式压缩数字输入信号的装置，方法和系统
公开(公告)号：US5530750A
公开(公告)日：1996-06-25
申请号：US198863
申请日：1994-02-18
申请人： Kenzo Akagiri
发明人： Kenzo Akagiri
IPC分类号： G11B20/00 , G11B20/10 , G11B27/031 , G11B27/30 , H03M7/30 , H03M7/50 , H04B1/66 , H04L9/00
CPC分类号： G11B27/3063 , G11B20/00007 , G11B20/10527 , G11B27/031 , H04B1/665
摘要： An apparatus, method, and system in which a compressed digital signal is derived from a digital input signal by compressing the digital input signal in a selected one of plural compression modes. The digital output signal has a different bit rate in each compression mode, but the digital input signal is received at the same bit rate in all the compression modes. In the method, spectral coefficients are derived from the digital input signal, and are grouped by frequency and by time into bands. Each band has a frequency width, and the frequency width of at least one of the bands is set according to the selected compression mode. The spectral coefficients in each band are quantized to provide quantized spectral coefficients. Finally, the quantized spectral coefficients in each band are included in the compressed digital signal, together with sub information for each band.
摘要翻译：一种装置，方法和系统，其中通过以多种压缩模式中选择的一种压缩数字输入信号，从数字输入信号导出压缩数字信号。在每个压缩模式下，数字输出信号具有不同的比特率，但在所有压缩模式下，数字输入信号都以相同的比特率被接收。在该方法中，频谱系数从数字输入信号导出，并且按频率和时间分组成频带。每个频带具有频率宽度，并且根据所选择的压缩模式来设置至少一个频带的频率宽度。量化每个频带中的频谱系数以提供量化频谱系数。最后，每个频带中的量化频谱系数与每个频带的子信息一起包括在压缩数字信号中。

32. 发明授权

US5396577A Speech synthesis apparatus for rapid speed reading 失效
标题翻译：用于快速读取的语音合成装置
公开(公告)号：US5396577A
公开(公告)日：1995-03-07
申请号：US994113
申请日：1992-12-22
申请人： Yoshiaki Oikawa , Kenzo Akagiri
发明人： Yoshiaki Oikawa , Kenzo Akagiri
IPC分类号： G10L13/04 , G10L13/08 , G10L5/00
CPC分类号： G10L13/08 , G10L13/047
摘要： In a speech synthesizing apparatus, importance degree information indicative of a degree of importance with respect to each text portion of input original text data is added to this text portion. Then, the original text data with such importance degree information is input. When a rapid reading process, or a head searching process is carried out for the original text input, speech synthesis is carried out by controlling several stages which text portion should be skipped, or at which speed, the text portions should be synthesized, in response to a speed instruction and importance degree information which are being input into the speech synthesizing apparatus.
摘要翻译：在语音合成装置中，向该文本部分添加表示相对于输入原始文本数据的每个文本部分的重要程度的重要程度信息。然后，输入具有这种重要度信息的原始文本数据。当对原始文本输入进行快速读取处理或头部搜索处理时，通过控制几个阶段来执行语音合成，该阶段应当跳过文本部分，或者应该以什么速度合成文本部分涉及正在输入到语音合成装置中的速度指令和重要度信息。

33. 发明授权

US5305155A Digital data reproducing apparatus 失效
标题翻译：数字数据再现装置
公开(公告)号：US5305155A
公开(公告)日：1994-04-19
申请号：US820518
申请日：1992-01-15
申请人： Kenzo Akagiri , Yoshiaki Oikawa
发明人： Kenzo Akagiri , Yoshiaki Oikawa
IPC分类号： G11B15/087 , G11B20/10 , G11B27/036 , G11B27/10 , G11B27/11 , G11B27/32 , G11B5/00 , G11B5/09
CPC分类号： G11B20/10 , G11B15/087 , G11B27/036 , G11B27/107 , G11B27/11 , G11B27/328 , G11B2220/65 , G11B2220/90 , G11B2220/913
摘要： Continuous data is divided into a plurality of portions and then recorded on a recording medium such as a magnetic tape or the like so that, even when a recording medium is exchanged, the divided data thus recorded can be continuously reproduced. During a period in which a recording head is moved to a second recording position after the recording at a first recording position is ended, corresponding data reproduced from a recording medium even when the recording medium is exchanged is written in a memory means in which an input signal applied to an input terminal is written.
摘要翻译：连续数据被分成多个部分，然后记录在诸如磁带等的记录介质上，使得即使当记录介质被交换时，可以连续地再现如此记录的分割数据。在记录头在第一记录位置的记录结束之后移动到第二记录位置的期间，即使在记录介质被交换时也从记录介质再现的相应数据被写入存储装置中，其中输入写入施加到输入端子的信号。

34. 发明授权

US5299240A Signal encoding and signal decoding apparatus 失效
标题翻译：信号编码和信号解码装置
公开(公告)号：US5299240A
公开(公告)日：1994-03-29
申请号：US9575
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 system for encoding audio signals, transmitting or recording the encoded audio signals, and then decoding the transmitted audio signal includes a circuit for determining the block length of the input audio signals based upon detected values of predetermined portions of the input signal and then performing an orthogonal conversion of the determined block length signal, in which the signal is orthogonally transformed from a time-domain signal to a frequency-domain signal. Following quantization, the converted and encoded signal is transmitted and upon performing reverse quantization, a reverse orthogonal converting circuit converts the signal back to the time-domain in keeping with the signal providing information concerning the various block lengths that were determined during encoding. The converted time-domain signals are then connected into a smooth waveform to form output audio signals.
摘要翻译：用于编码音频信号，发送或记录经编码的音频信号，然后解码所传输的音频信号的系统包括：一个电路，用于根据输入信号的预定部分的检测值确定输入音频信号的块长度，然后执行所确定的块长度信号的正交转换，其中信号从时域信号正交变换为频域信号。在量化之后，发送经转换和编码的信号，并且在执行反向量化时，反向正交转换电路根据提供关于在编码期间确定的各种块长度的信息提供信息将信号转换回时域。然后将转换的时域信号连接成平滑波形以形成输出音频信号。

35. 发明授权

US5204677A Quantizing error reducer for audio signal 失效
标题翻译：音量信号量化误差减少器
公开(公告)号：US5204677A
公开(公告)日：1993-04-20
申请号：US729388
申请日：1991-07-12
申请人： Kenzo Akagiri , Makoto Akune
发明人： Kenzo Akagiri , Makoto Akune
IPC分类号： H03M7/38 , G11B20/10 , H03H17/00 , H03H17/02 , H04B1/66 , H04B14/04
CPC分类号： H04B14/046 , G11B20/10527 , H04B1/665
摘要： There is provided a quantizing error reducer for an audio signal, which is constructed to feed a quantizing error back to the input side of a quantizer through a noise filter, wherein the coefficient of the noise filter is set on the basis of information relating to the equiloudness curve, thereby making it possible to reduce the noise in the hearing sense.

36. 发明授权

US5166981A Adaptive predictive coding encoder for compression of quantized digital audio signals 失效
标题翻译：用于压缩数字音频信号的自适应预编码编码器
公开(公告)号：US5166981A
公开(公告)日：1992-11-24
申请号：US524088
申请日：1990-05-16
申请人： Naoto Iwahashi , Kenzo Akagiri
发明人： Naoto Iwahashi , Kenzo Akagiri
IPC分类号： H03M7/38 , H03M3/04 , H03M7/00 , H04B14/04
CPC分类号： H04B14/046 , H03M7/3004
摘要： In an adaptive predictive coding (APC) encoder for compression of quantized digital audio, the signal-to-quantization noise ratio is improved and more complicated input signal spectra can be processed through use of an input signal frequency spectrum detector employing linear predictive coding (LPC) analysis for setting the coefficients of the requantization error noise filter. The detector operates in synchronism with the predictive and noise filters so as to minimize the number of processing calculations while maximizing processing speed.

37. 发明授权

US5157760A Digital signal encoding with quantizing based on masking from multiple frequency bands 失效
标题翻译：基于多频段屏蔽的数字信号编码
公开(公告)号：US5157760A
公开(公告)日：1992-10-20
申请号：US685745
申请日：1991-04-16
申请人： Kenzo Akagiri
发明人： Kenzo Akagiri
IPC分类号： G10L19/00 , G06T9/00 , H03H15/00 , H03H17/00 , H03H21/00 , H03M7/30 , H04B1/66 , H04B3/04
CPC分类号： H04B1/667 , G06T9/007 , H04B1/665
摘要： An allowable noise level is set for each frequency band of the input digital signal on the basis of the energy level of the respective frequency band and that of another frequency band. The energy level and the allowable noise level are non-linearly related so as to enable high data compression and to provide a satisfactory sound. The signal components of each of the frequency bands are quantized with a number of bits which correspond to the difference between the energy level of each frequency band and the allowable noise level. If the input digital signal is preemphasized, the signal is corrected for preemphasis prior to the setting of the allowable noise level, so that the quantization is performed on a signal which is free from the effects of preemphasis.

38. 发明授权

US5038310A Amplitude compressing and/or expanding circuit employing enhanced normalization 失效
标题翻译：采用增强标准化的幅度压缩和/或扩展电路
公开(公告)号：US5038310A
公开(公告)日：1991-08-06
申请号：US511058
申请日：1990-04-19
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 a circuit for expanding and/or compressing an amplitude of an input signal; a control signal is generated in response to the input signal and supplied to a multiplier circuit for multiplying the input signal by the control signal, a first subtracter subtracts the input signal from the output of the multiplier circuit, a signal processor processes the first subtracter output signal, and a second subtracter subtracts the output signal of the processor from the output signal of the multiplier circuit. The control signal generating circuit includes an envelope detector for detecting the envelope of the output signal of a proceeding absolute value generating circuit and which includes a pre-bit-shifting circuit for bit-shifting the envelope detected output signal by an amount determined by a pre-bit-shifting control signal, a normalizing circuit bit-shifting the output signal of the pre-bit shifting circuit so such that a normalized output signal is generated, the normalizing circuit further generating a bit shift signal representing a bit shift amount required for normalizing a pre-bit shifted signal corresponding to the detected envelope output signal occurring just prior to the current detected envelope output signal being applied to the pre-bit-shifting circuit, and a control circuit supplied with the bit shift signal for generating the control signal supplied to the pre-bit-shifting circuit.

39. 发明授权

US4685115A Apparatus for transmitting digital signals 失效
标题翻译：用于发送数字信号的装置
公开(公告)号：US4685115A
公开(公告)日：1987-08-04
申请号：US823494
申请日：1986-01-13
申请人： Kenzo Akagiri , Masayuki Nishiguchi
发明人： Kenzo Akagiri , Masayuki Nishiguchi
IPC分类号： H03M7/30 , H04B1/66 , H04B14/04 , H04B14/06 , H04J3/16
CPC分类号： H04B14/046 , H04B1/665 , H04J3/1611 , H04N19/90
摘要： The apparatus uses at least data in the straight PCM mode and data in the differential PCM mode of second or higher orders as data based upon a sampling value of input signals, and detects and compares maximum absolute values of data of these modes. Here, the apparatus so compares that the maximum absolute value of the differential PCM mode is more weighted than the maximum absolute value of the straight PCM mode, selects the mode having the smaller maximum absolute value, and transmits the data of the selected mode in the form of digital signals. This makes it possible to suppress low-pass noise when medium-pass signals are input, to advantageously utilize the masking effect, to reduce the effect of code error, and to improve apparent SN ratio.
摘要翻译： PCT No.PCT / JP85 / 00266 Sec。 371日期1986年1月13日 102（e）日期1986年1月13日PCT提交1985年5月11日PCT公布。第WO85 / 05517号公报 1985年12月5日。该装置至少使用直接PCM模式的数据和基于输入信号的采样值的第二或更高阶的差分PCM模式中的数据作为数据，并且检测并比较数据的最大绝对值的这些模式。这里，该装置比较了差分PCM模式的最大绝对值比直接PCM模式的最大绝对值更多的权重，选择具有较小最大绝对值的模式，并将所选模式的数据发送到形式的数字信号。这使得可以在输入中间通过信号时抑制低通噪声，以有利地利用掩蔽效应来减少代码误差的影响，并提高表观SN比。

40. 发明授权

US4441083A Noise reduction circuit 失效
标题翻译：降噪电路
公开(公告)号：US4441083A
公开(公告)日：1984-04-03
申请号：US300387
申请日：1981-09-08
申请人： Kenzo Akagiri , Masayuki Katakura , Motomi Ookouchi
发明人： Kenzo Akagiri , Masayuki Katakura , Motomi Ookouchi
IPC分类号： H04B1/62 , G11B20/04 , H03G9/02 , H03F1/26 , H03G3/18
CPC分类号： H03G9/025
摘要： A noise reduction circuit for use in an audio signal recording/reproducing apparatus is comprised of a first signal path including a voltage-controlled amplifier for amplifying a signal supplied thereto with controllable gain and a differentiating circuit for differentiating at least that portion of the signal passing through the voltage-controlled amplifier within the audio range; a level detecting circuit for controlling the gain of the voltage-controlled amplifier in response to the level of the signal passing through the voltage-controlled amplifier; a feedback resistor connected as a negative feedback path with the first signal path for providing an upper limit to the gain imparted to the signal supplied to the noise reduction circuit; a subtraction circuit for subtracting the negatively fed back signals from the signal supplied to the noise reduction circuit to produce an input signal for the first signal path; a second resistor or a low-pass filter connected as a positive feedforward path between the input of the noise reduction circuit and the output of the first signal path for providing a lower limit to the gain imparted to the signal supplied to the noise reduction circuit; and an anti-limiting circuit connected in parallel with the feedback resistor for compensating the signal supplied to the noise reduction circuit when the level of the signal is abruptly increased.
摘要翻译：用于音频信号记录/再现装置的降噪电路包括第一信号路径，该第一信号路径包括用于放大可控增益的供给的信号的电压控制放大器和用于至少区分信号通过部分的微分电路通过音频范围内的压控放大器; 电平检测电路，用于响应于通过压控放大器的信号的电平来控制压控放大器的增益; 反馈电阻器，其作为负反馈路径连接到第一信号路径，用于提供施加到降噪电路的信号的增益的上限; 减法电路，用于从提供给所述噪声降低电路的信号中减去所述负反馈信号，以产生用于所述第一信号路径的输入信号; 连接在噪声降低电路的输入端和第一信号路径的输出端之间作为正前馈路径的第二电阻器或低通滤波器，用于提供给提供给降噪电路的信号的增益的下限; 以及与反馈电阻并联连接的反限制电路，用于当信号电平突然增加时补偿提供给降噪电路的信号。

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