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21. 发明申请

US20170141761A1 A FILTER THAT MINIMIZES IN-BAND NOISE AND MAXIMIZES DETECTION SENSITIVITY OF EXPONENTIALLY-MODULATED SIGNALS 有权
公开(公告)号：US20170141761A1
公开(公告)日：2017-05-18
申请号：US15127472
申请日：2015-03-20
申请人： DYNASPOT CORP.
发明人： Marvin L. SASSLER , Alan T. SASSLER
IPC分类号： H03H17/02 , H04B1/16
CPC分类号： H03H17/0248 , H03D3/06 , H03D3/26 , H03H17/0264 , H03H2240/00 , H04B1/16
摘要： The trans-filter compresses in band AWGN, demodulates input signals and has no threshold due to applied noise. Two frequency selective networks with opposite amplitude vs frequency slopes are designed to remain 180 degrees out of phase over the signal band. Output amplitudes are equal at band center and are summed producing a monotonic amplitude vs frequency characteristic going thru zero at center frequency with abrupt phase reversal. This produces the parabolic output noise density and differentiates applied signals. Absence of nonlinear circuit components and product devices prevents generation of noise x noise products, avoiding the threshold phenomenon. Exponentially modulated digital signals produce output impulses due to the slope and abrupt phase reversal. The impulses have strong fundamental frequency components and may be recovered at baseband without frequency conversion. Cascading trans-filters increases noise reduction and impulse amplitude. The trans-filter algorithm may be used separately or in conjunction with one or more hardware trans-filters.

22. 发明授权

US08583717B2 Signal processing circuit 有权
标题翻译：信号处理电路
公开(公告)号：US08583717B2
公开(公告)日：2013-11-12
申请号：US13003738
申请日：2009-09-24
申请人： Kohei Teramoto , Masaru Kimura , Tsuyoshi Nakada , Fuminori Saito
发明人： Kohei Teramoto , Masaru Kimura , Tsuyoshi Nakada , Fuminori Saito
IPC分类号： G06F17/10
CPC分类号： H03H21/0012 , H03H17/0264 , H03H17/0294 , H03H17/04 , H03H17/06 , H03H2017/0483
摘要： A signal processing circuit has two types of filters: an IIR filter 11 and an FIR filter 12 having an equivalent transfer function at all times. In an adjustment mode in which the signal processing circuit is adjusted to have an arbitrary transfer function, the signal processing circuit makes a configuration setting to use the IIR filter 11. When completing the adjustment or in a signal processing mode, the signal processing circuit makes a configuration setting change to switch to the FIR filter 12 having the equivalent transfer function.
摘要翻译：信号处理电路具有两种类型的滤波器：总是具有等效传递函数的IIR滤波器11和FIR滤波器12。在信号处理电路被调整为具有任意传递函数的调整模式中，信号处理电路进行配置设置以使用IIR滤波器11.当完成调整或信号处理模式时，信号处理电路配置设置改变以切换到具有等效传送功能的FIR滤波器12。

23. 发明授权

US5123050A Sound field control system 失效
标题翻译：声场控制系统
公开(公告)号：US5123050A
公开(公告)日：1992-06-16
申请号：US596086
申请日：1990-10-11
申请人： Mitsuhiko Serikawa , Masaharu Matsumoto , Akihisa Kawamura , Katsuaki Sato
发明人： Mitsuhiko Serikawa , Masaharu Matsumoto , Akihisa Kawamura , Katsuaki Sato
IPC分类号： G10K15/08 , H03G5/16 , H03H17/02 , H04S1/00
CPC分类号： H04S1/002 , G10K15/08 , H03G5/165 , H03H17/0264 , H04S1/007
摘要： In the process of forming the effect sound for reproducing a sound field, a down-sampling part for reducing the sampling frequency of the digital signal is disposed before the step of the digital operation which becomes the central part of the forming process, by which a large amount of operation processing is carried out at a low sampling rate. With respect to the direct sound, processing such as gain adjustment is carried out without decreasing the sampling frequency. This results in a sound field control system which permits one to realize a higher quality and natural sound field control effect without significantly increasing the amount of hardware needed.

24. 发明授权

US4754483A Data compression system and method for audio signals 失效
标题翻译：音频信号的数据压缩系统和方法
公开(公告)号：US4754483A
公开(公告)日：1988-06-28
申请号：US89481
申请日：1987-08-25
申请人： Charles S. Weaver
发明人： Charles S. Weaver
IPC分类号： A61B5/00 , H03G7/00 , H03H17/02 , H03M7/30 , H03M7/42 , G10L5/00 , G11B5/09
CPC分类号： A61B5/0006 , H03G7/007 , H03H17/023 , H03H17/0264 , H03M7/30 , H03M7/42 , A61B5/7232
摘要： A data reduction system is disclosed which includes an analog to digital converter for converting an analog signal to digital sample signal form, a digital compression filter for compression filtering the digital sample signals, and an encoder for truncated Huffman encoding the compression filter output. A decoder for decoding the encoded signal, a digital reconstruction filter for decomposition filtering of the decoded signal, and digital to analog converter means are included to reconstruct the analog signal. The digital compression filter has a transfer function which includes zeros as the unit circle in the Z-plane, while the digital reconstruction filter has poles that normally are on or inside the unit circle in the Z-plane at the same angular positions as the zeros of the digital compression filter. The poles of the reconstruction filter are momentarily movable inwardly from their normal positions in response to a detected error signal to speed recovery from such error signal.
摘要翻译：公开了一种数据降低系统，其包括用于将模拟信号转换为数字采样信号形式的模数转换器，用于对数字采样信号进行压缩滤波的数字压缩滤波器，以及用于对压缩滤波器输出进行编码的截断霍夫曼编码器。包括用于对编码信号进行解码的解码器，用于解码信号的分解滤波的数字重建滤波器和数模转换器装置，以重构模拟信号。数字压缩滤波器具有传递函数，其包括Z为Z平面中的零点作为单位圆，而数字重建滤波器具有通常位于Z平面上的单位圆内或与零的相同角度位置内的极点的数字压缩滤波器。响应于检测到的误差信号，重建滤波器的极点从它们的正常位置向内可动地向内移动，以便从这种误差信号加速恢复。

25. 发明公开

EP2692079A4 TIME DOMAIN SIGNAL GENERATION 审中-公开
标题翻译：时间跨度信号生成
公开(公告)号：EP2692079A4
公开(公告)日：2015-03-04
申请号：EP12762882
申请日：2012-02-23
申请人： INTEL CORP
发明人： KERNER MICHAEL , KRAVTSOV VLADIMIR , HAREL TOM
IPC分类号： H04J11/00 , H03H17/06 , H04B7/26
CPC分类号： H04L27/2613 , H03H17/0213 , H03H17/0264 , H03H17/0657 , H03H17/0685 , H03H2017/0214 , H04L27/2633 , H04L27/2634 , H04L27/264

26. 发明公开

EP2692079A2 TIME DOMAIN SIGNAL GENERATION 审中-公开
标题翻译：时间跨度信号生成
公开(公告)号：EP2692079A2
公开(公告)日：2014-02-05
申请号：EP12762882.4
申请日：2012-02-23
申请人： Intel Corporation
发明人： KERNER, Michael , KRAVTSOV, Vladimir , HAREL, Tom
IPC分类号： H04J11/00 , H04B7/26
CPC分类号： H04L27/2613 , H03H17/0213 , H03H17/0264 , H03H17/0657 , H03H17/0685 , H03H2017/0214 , H04L27/2633 , H04L27/2634 , H04L27/264
摘要： Embodiments of apparatuses, articles, methods, and systems for efficient generation of a time domain signal in multi-carrier communications are generally described herein. Other embodiments may be described and claimed.

27. 发明公开

EP1533898A1 DIGITAL FILTER DESIGNING METHOD, DIGITAL FILTER DESIGNING PROGRAM, DIGITAL FILTER 审中-公开
标题翻译： VERFAHREN ZUM ENTWURF EINES DIGITALEN过滤器，程序ZUM ENTWURF数字数字滤波器，数字滤波器
公开(公告)号：EP1533898A1
公开(公告)日：2005-05-25
申请号：EP03764193.3
申请日：2003-07-14
申请人： Neuro Solution Corp.
发明人： KOYANAGI, Yukio
IPC分类号： H03H17/06
CPC分类号： H03H17/0264 , H03H17/026 , H03H17/0283
摘要： According to a basic unit filter having a predetermined basic numeric string as a filter coefficient, a high-pass unit filter (H15) and a low-pass unit filter (L13) having pass bands having a common center frequency Fc are created. These are connected in the cascade way to design a band pass filter. Characteristic values obtained by combining a few types of unit filters are cancelled by each other. Thus, without pulling out a necessary frequency band and only by the cascade connection of the high-pass unit filter (H15) and the low-pass unit filter (L13), it is possible to extract a superimposed portion as a band pass filter pass band.
摘要翻译：根据具有预定的基本数字串作为滤波器系数的基本单位滤波器，产生具有公共中心频率Fc的通带的高通单位滤波器（H15）和低通单位滤波器（L13）。这些以级联方式连接以设计带通滤波器。通过组合几种类型的单位滤波器获得的特征值被彼此抵消。因此，只要通过高通单元滤波器（H15）和低通单元滤波器（L13）的级联连接而不拉出必要的频带，就可以提取叠加部分作为带通滤波器通过带。

28. 发明专利

JP5420659B2 How to update the encoder by the filter interpolation 有权
公开(公告)号：JP5420659B2
公开(公告)日：2014-02-19
申请号：JP2011520559
申请日：2009-07-03
申请人：オランジュ
发明人：フィリップ，ピエリック , ヴィレット，ダヴィッド
IPC分类号： G10L19/02 , H04N19/60
CPC分类号： G10L19/0212 , H03H17/0264
摘要： A method for updating the processing capacity of an encoder or decoder to use a modulated transform having a size greater than a predetermined initial size is provided, particularly, where the encoders or decoders are for storing an initial prototype filter defined by an ordered set of initial size coefficients. A step is provided for constructing a prototype filter of a size greater than the initial size to implement the modulated transform of the greater size by inserting at least one coefficient between two consecutive coefficients of the initial prototype filter.

29. 发明专利

JP2018155799A フィルタ特性変更装置、フィルタ特性変更方法、プログラムおよび電子楽器审中-公开
公开(公告)号：JP2018155799A
公开(公告)日：2018-10-04
申请号：JP2017050164
申请日：2017-03-15
申请人：カシオ計算機株式会社
发明人：佐藤博毅 , 横田益男
IPC分类号： G10H1/12 , G10H1/00
CPC分类号： G10H1/02 , G10H1/00 , G10H1/0008 , G10H1/0091 , G10H1/057 , G10H1/12 , G10H1/18 , G10H1/46 , G10H2210/265 , G10H2210/281 , G10H2210/315 , G10H2240/071 , G10H2250/025 , G10H2250/035 , G10H2250/041 , G10H2250/055 , G10H2250/115 , G10H2250/121 , G10H2250/541 , G10K15/08 , G10K15/12 , H03H17/0009 , H03H17/0264 , H03H17/0294 , H03H17/04 , H03H2017/0295 , H03H2017/0472 , H04R5/04 , H04S7/30
摘要：【課題】フィルタ特性の変更時に生じる不自然さを解消するフィルタ特性変更装置を提供する。【解決手段】残響アルゴリズムに基づき残響音のランダムな反射や分散をシミュレートする回路要素として機能する複数の遅延巡回フィルタ(オールパスフィルタ又はコムフィルタ)に、少なくとも1つの予備を含ませておき、リバーブ・タイプの切り替えに応じて、複数の中で使用中の遅延巡回フィルタを1つづつ、パラメータ設定された未使用の遅延巡回フィルタにクロスフェードで切り替える処理を、複数に含まれる遅延巡回フィルタの個数に相当する回数分繰り返すことによって所望の残響特性へ滑らかに切り替える結果、フィルタ特性の変更時に生じる不自然さを解消することが可能になる。【選択図】図8

30. 发明专利

JPWO2004008637A1 デジタルフィルタの設計方法、デジタルフィルタ設計用プログラム、デジタルフィルタ审中-公开
公开(公告)号：JPWO2004008637A1
公开(公告)日：2005-11-17
申请号：JP2004521206
申请日：2003-07-14
申请人：有限会社ニューロソリューション
发明人：裕喜生小柳 , 裕喜生小柳
IPC分类号： H03H17/06 , H03H17/02
CPC分类号： H03H17/0264 , H03H17/026 , H03H17/0283
摘要：所定の基本的な数値列をフィルタ係数とする基本ユニットフィルタに基づいて、中心周波数Fcが共通の通過域を有するハイパスユニットフィルタH15とローパスユニットフィルタL13とを作成し、これらを縦続接続することによってバンドパスフィルタを設計することにより、数種類のユニットフィルタを組み合わせた特性値どうしの相殺により必要な周波数帯域を抜き出すようにすることなく、ハイパスユニットフィルタH15とローパスユニットフィルタL13との縦続接続だけで、互いに重なった部分をバンドパスフィルタの通過域として取り出すことができるようにする。

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