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1. 发明授权

US06816597B1 Pseudo stereophonic device 失效
标题翻译：伪立体声装置
公开(公告)号：US06816597B1
公开(公告)日：2004-11-09
申请号：US09581532
申请日：2000-08-31
申请人： Seiji Kawano
发明人： Seiji Kawano
IPC分类号： H04R500
CPC分类号： H04R5/00 , H04S5/00
摘要： In a pseudo stereophonic device for producing a pseudo stereophonic signal from a monophonic signal, there are provided m delay units connected in series and gradually delaying an input signal S, m FIR digital filters for respectively subjecting output signals Sk (k=1, 2, . . . m) of the delay units to filter processing, and an operating circuit for executing a predetermined operation on the basis of outputs Yk (k=1, 2, . . . m) of the respective FIR digital filters, to produce pseudo stereophonic signals LOUT and ROUT.
摘要翻译：在用于从单声道信号产生伪立体声信号的伪立体声装置中，提供串联连接的m个延迟单元，并逐渐延迟输入信号S，m FIR数字滤波器，用于分别使输出信号Sk（k = 1,2， ... m）和用于根据各个FIR数字滤波器的输出Y k（k = 1,2，...，m）执行预定操作的操作电路，以产生伪立体声信号LOUT和ROUT。

2. 发明授权

US06760446B1 Point source speaker system 失效
标题翻译：点源扬声器系统
公开(公告)号：US06760446B1
公开(公告)日：2004-07-06
申请号：US09678977
申请日：2000-10-05
申请人： Francis Allen Miller
发明人： Francis Allen Miller
IPC分类号： H04R500
CPC分类号： H04S1/002 , H04R5/02 , H04S3/00
摘要： The system of the present invention includes, briefly, a point source speaker system, comprising a processor which produces a left minus right (L−R) audio signal, a right plus left (R+L) and a right minus left (R−L) audio signal; three speakers each for audibly transmitting one of the L−R, R+L and R−L audio signals; and a point source speaker enclosure for housing the three speakers in a single enclosure.
摘要翻译：本发明的系统简要地包括点源扬声器系统，其包括产生左减右（LR）音频信号，右加左（R + L）和右减左（RL）音频信号的处理器 ; 每个用于可听见地发送L-R，R + L和R-L音频信号之一的三个扬声器; 以及用于将三个扬声器容纳在单个外壳中的点源扬声器外壳。

3. 发明授权

US06721425B1 Sound signal mixing 失效
标题翻译：声音混合
公开(公告)号：US06721425B1
公开(公告)日：2004-04-13
申请号：US09122988
申请日：1998-07-27
申请人： J. Richard Aylward
发明人： J. Richard Aylward
IPC分类号： H04R500
CPC分类号： H04S3/02
摘要： A method of down mixing a plurality of signals including at least a left surround signal, a right surround signal, a left signal and a right signal into a stereophonic pair that is a left transmitted signal and a right transmitted signal includes summing the left surround and right surround signals to provide a monophonic surround signal, filtering the monophonic surround signal to provide a filtered monophonic signal having properties related to the diffraction pattern around the head of a listener, multiplying the filtered monophonic surround signal with a right coefficient signal related to the ratio of the magnitude of the right surround signal to the sum of the magnitudes of the left surround signal and the right surround signal to provide a left product signal and multiplying the filtered monophonic surround signal with a left coefficient signal related to the ratio of the magnitude of the left surround signal to the sum of the magnitudes of the left surround signal and the right surround signal to provide a right product signal, combining signals related to the left product signal and the left front signal to provide the left transmitted signal, and combining signals related to the right product signal and the right front signal to provide the right transmitted signal.
摘要翻译：将包括至少左环绕信号，右环绕信号，左信号和右信号的多个信号下混合到作为左发送信号和右发送信号的立体声对中的方法包括将左环绕和右环绕信号以提供单声道环绕信号，对单声道环绕信号进行滤波以提供具有与收听者头部周围的衍射图案相关的特性的滤波单声道信号，将滤波的单声道环绕信号与与该比例相关的右系数信号相乘右环绕声信号的大小与左环绕信号和右环绕信号的大小的和之和，以提供左乘积信号，并将滤波的单声道环绕信号与与左声道环绕信号的幅度的比值相关的左系数信号相乘左环绕声信号与左环绕声信号和右声道的幅度之和环绕信号以提供正确的产品信号，组合与左产品信号和左前信号相关的信号以提供左发送信号，以及组合与右产品信号和右前信号相关的信号以提供正确的发送信号。

4. 发明授权

US06711266B1 Surround sound channel encoding and decoding 失效
标题翻译：环绕声道编解码
公开(公告)号：US06711266B1
公开(公告)日：2004-03-23
申请号：US08796285
申请日：1997-02-07
申请人： J. Richard Aylward
发明人： J. Richard Aylward
IPC分类号： H04R500
CPC分类号： H04S3/02
摘要： Surround sound encoding and decoding includes apparatus and techniques for encoding a number of major channels of a surround sound signal, such as left, right, center, left surround and right surround, into a lesser number of channels, such as left transmitted and right transmitted, and decoding the lesser number of channels into a larger number of decoded channels, such as left, right, center, left surround and right surround, for being electroacoustically transduced.
摘要翻译：环绕声编码和解码包括用于将诸如左，右，中，左环绕和右环绕的环绕声信号的多个主要信道编码到较少数量的信道中的装置和技术，诸如左传输和右传输并且将较少数量的信道解码为更多数量的解码信道，例如左，右，中央，左环绕和右环绕，用于电声转换。

5. 发明授权

US06711265B1 Centralizing of a spatially expanded stereophonic audio image 有权
标题翻译：集中空间扩展的立体声音频图像
公开(公告)号：US06711265B1
公开(公告)日：2004-03-23
申请号：US10009141
申请日：2001-10-24
申请人： Robert Edward Morris, Jr.
发明人： Robert Edward Morris, Jr.
IPC分类号： H04R500
CPC分类号： H04S1/002
摘要： In a stereophonic system having sum and difference signals with expanded spatial imaging, localization of center audio materials more towards the center is accomplished by equalization of the (L+R) sum signal. The equalization comprises decreasing the bass response while increasing the treble response of the sum signal with the desired bass reduction being accomplished by the use of a gyrator to economically synthesize an inductance. Additionally, the equalizations in the (L+R) sum signal to reduce the signal at bass frequencies and to increase the signal at treble frequencies are switchable singly or in combination between “ON” and “OFF” modes.
摘要翻译：在具有扩展空间成像的和信号和差分信号的立体声系统中，通过（L + R）和信号的均衡来实现中心音频材料对中心的定位。均衡包括降低低音响应，同时通过使用回转器来经济地合成电感来实现所希望的低音降低的和信号的高音响应。此外，（L + R）和信号中的低音频率信号和增加高频信号的均衡可以单独切换或者在“ON”和“OFF”模式之间组合。

6. 发明授权

US06697491B1 5-2-5 matrix encoder and decoder system 有权
标题翻译： 5-2-5矩阵编码器和解码器系统
公开(公告)号：US06697491B1
公开(公告)日：2004-02-24
申请号：US09146442
申请日：1998-09-03
申请人： David H. Griesinger
发明人： David H. Griesinger
IPC分类号： H04R500
CPC分类号： H04S3/02 , H04S7/307 , H04S2400/05 , H04S2420/01
摘要： A sound reproduction system has been developed, for converting signals on two input channels into surround signals on five or seven output channels and vice-versa. A decoder is included which enhances the correlated component of the input signals in the desired direction and reduces the strength of such signals in channels not associated with the encoded direction, while preserving the apparent loudness of all output channels, the separation between the respective left and right output channels and the total energy of the uncorrelated component of the input channels in each output channel. Included within the decoder is a uniquely defined matrix that helps to ensure that the surface of the output signals is smooth and continuous. An encoder is also included which encodes five or seven channels of sound into two so the two channels may be decoded by a variety of decoders with the correct sound direction and level.
摘要翻译：已经开发了一种声音再现系统，用于将两个输入通道上的信号转换成五个或七个输出通道的环绕信号，反之亦然。包括一个解码器，其增强输入信号在期望方向上的相关分量，并且减少与编码方向无关的通道中的这种信号的强度，同时保持所有输出通道的明显响度，右输出通道和每个输出通道中输入通道的不相关分量的总能量。解码器中包含的唯一定义的矩阵有助于确保输出信号的表面平滑和连续。还包括编码器，其将5或7声道的声音编码为2，因此可以通过具有正确声音方向和电平的各种解码器对两个声道进行解码。

7. 发明授权

US06628787B1 Wavelet conversion of 3-D audio signals 有权
标题翻译： 3-D音频信号的小波变换
公开(公告)号：US06628787B1
公开(公告)日：2003-09-30
申请号：US09283014
申请日：1999-03-31
申请人： David Stanley McGrath , Adam Richard McKeag
发明人： David Stanley McGrath , Adam Richard McKeag
IPC分类号： H04R500
CPC分类号： H04S3/02 , H04S2420/11
摘要： An improved method and apparatus for creating multi-channel (or binaural) signals from a B-format sound-field source is disclosed. The method allows the encoded spatial format (B-format) to be separated into multiple bands, with each band assigned a short-term direction factor, from which the higher-resolution multi-channel (or binaural) output signals may be determined. The direction factor is determined, for each filter band, based on the short-term statistics of the soundfield signals in those bands. Based on this direction factor, the speaker drive signals are computed for each band by panning the signals to drive the nearest speakers. In addition, residual signal components are apportioned to the speaker signals by means of previously known decoding techniques.
摘要翻译：公开了一种用于从B格式的声场源产生多声道（或双耳）信号的改进的方法和装置。该方法允许将编码的空间格式（B格式）分离成多个频带，每个频带分配短期方向因子，可以从其中确定更高分辨率的多声道（或双耳）输出信号。对于每个滤波器频带，基于这些频带中的声场信号的短期统计来确定方向因子。基于该方向因素，通过平移信号来驱动最近的扬声器，为每个频带计算扬声器驱动信号。此外，残留信号分量通过先前已知的解码技术分配给扬声器信号。

8. 发明授权

US06608902B1 Stereo signal separation circuit and application thereof 失效
标题翻译：立体声信号分离电路及其应用
公开(公告)号：US06608902B1
公开(公告)日：2003-08-19
申请号：US09019913
申请日：1998-02-07
申请人： H. Spence Jackson , Mathew A. Rybicki , Giri Nk Rangan
发明人： H. Spence Jackson , Mathew A. Rybicki , Giri Nk Rangan
IPC分类号： H04R500
CPC分类号： H04S1/002
摘要： A stereo separation circuit includes a pair of amplifiers and a pair of divider circuits. Each of the amplifiers is coupled to receive a stereo signal (e.g., a left stereo signal or a right stereo signal) and the output of the other amplifier through a portion of one of the divider circuits. The other portion of the divider circuit is coupled as feedback across an amplifier. A ratio between the feedback portion of the divider circuit and the other portion of the divider circuit provides a separation ratio. The greater the separation ratio, the greater the perceived audio separation of the stereo signals.
摘要翻译：立体声分离电路包括一对放大器和一对分频电路。每个放大器被耦合以通过一个分频器电路的一部分来接收立体声信号（例如，左立体声信号或右立体声信号）和另一个放大器的输出。分频器电路的另一部分作为反馈跨接在放大器上。除法器电路的反馈部分与分频器电路的另一部分之间的比率提供了分离比。分离比越大，立体声信号的感知音频分离就越大。

9. 发明授权

US06587565B1 System for improving a spatial effect of stereo sound or encoded sound 失效
标题翻译：用于改善立体声或编码声音的空间效果的系统
公开(公告)号：US06587565B1
公开(公告)日：2003-07-01
申请号：US08944211
申请日：1997-10-06
申请人： Pyung Choi
发明人： Pyung Choi
IPC分类号： H04R500
CPC分类号： H04S1/002
摘要： A system for improving a spatial effect of stereo sound or encoded sound when producing three dimensional image sound signals from signals of stereo channel includes a spatial effect enhancing portion where a signal for enhancing spatial effect and directivity of sound is produced, a band enhancing portion where a signal for enhancing a signal component of the stereo channel signal in a low frequency range and for maintaining the signal component in a middle frequency range is generated, and a matrix portion where the output signal of the spatial effect enhancing portion, the output signal of the band enhancing portion and the stereo channel signal are calculated in a matrix manner, so that the spatial effect of sound is improved using a differential component between left and right side channel signals. According to the invention, the spatial effect of sound can be improved without using a complicated circuit construction, the deterioration of S/N ratio is prevented, and the cost performance for realizing a spatial effect of sound is remarkably improved.
摘要翻译：一种用于在从立体声通道的信号产生三维图像声音信号时改善立体声或编码声音的空间效果的系统包括空间效果增强部分，其中产生用于增强空间效果和声音指向性的信号，频带增强部分，产生用于在低频范围内增强立体声声道信号的信号分量并将信号分量维持在中频范围的信号，以及矩阵部分，其中空间效果增强部分的输出信号，以矩阵方式计算频带增强部分和立体声信道信号，从而使用左右声道信号之间的差分分量改善声音的空间效果。根据本发明，可以在不使用复杂的电路结构的情况下改善声音的空间效果，防止S / N比的劣化，并且显着提高用于实现声音的空间效果的成本性能。

10. 发明授权

US06577736B1 Method of synthesizing a three dimensional sound-field 有权
标题翻译：合成三维声场的方法
公开(公告)号：US06577736B1
公开(公告)日：2003-06-10
申请号：US09332601
申请日：1999-06-14
申请人： Richard David Clemow
发明人： Richard David Clemow
IPC分类号： H04R500
CPC分类号： H04R5/02 , H04R5/027 , H04S5/00 , H04S5/02 , H04S2420/01
摘要： A method of synthesizing a three dimensional sound-field using a pair of front and a pair of rear loudspeakers, including: a) determining the desired position of a sound source; b) providing a binaural pair of signals corresponding to the sound source using an HRTF filter; c) providing the left signal of said binaural pair of signals to both the left front and left rear loudspeakers through a front and a rear gain control means respectively; d) providing the right signal of said binaural pair of signals to both the right front and right rear loudspeakers through a front and a rear gain control means respectively; e) controlling the ratio of the front signal gains to the rear signal gains as a function of the azimuth angle of the sound source; and f) performing transaural crosstalk cancellation on the front and rear signal pairs through respective transaural crosstalk cancellation means.
摘要翻译：一种使用一对前置扬声器和一对后置扬声器来合成三维声场的方法，包括：a）确定声源的期望位置; b）使用HRTF滤波器提供对应于声源的双耳对信号; c）分别通过前后增益控制装置向左前后扬声器和左后扬声器提供所述双耳信号的左信号; d）分别通过前和后增益控制装置向右前扬声器和右后扬声器提供所述双耳信号的正确信号; e）根据声源的方位角控制前信号增益与后信号增益的比率; 以及f）通过相应的经弦波串扰消除装置在前信号对和后信号对上执行经昼夜串扰消除。

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