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公开(公告)号：US5263087A
公开(公告)日：1993-11-16
申请号：US789529
申请日：1991-11-14
申请人： James W. Fosgate
发明人： James W. Fosgate
摘要： A method and apparatus for generating control voltage signals in a surround sound processor is disclosed which utilizes a one-shot monostable multivibrator for minimizing intermodulation distortion while following rapid directional changes, yet minimizing intermodulation distortion. The apparatus includes a circuit for smoothing the directional information signals derived from audio input signals each with a continuously variable time constant to generate a corresponding control voltage signal, such that each time constant depends inversely upon the magnitude of the difference between the directional information signal applied thereto and the corresponding control voltage signal generated thereby. A one-shot circuit temporarily reduces the value of the continuously variable time constant associated with each smoothing circuit to a predetermined minimum value for a short, predetermined time period so that each of the corresponding control voltage signals rapidly approaches the value of its corresponding directional information signal within this time period, the one-shot being activated when the difference between any one of the directional information signals and its corresponding control voltage signal exceeds a predetermined threshold value. Other improvements are incorporated in the surround sound processor to optimize its performance.
摘要翻译： 公开了一种用于在环绕声处理器中产生控制电压信号的方法和装置，其利用单稳态单稳态多谐振荡器来最小化互调失真同时跟随快速方向改变，同时最小化互调失真。 该装置包括用于平滑从音频输入信号导出的方向信息信号的电路，每个具有连续可变的时间常数以产生相应的控制电压信号，使得每个时间常数与所施加的方向信息信号之间的差值的大小成反比 由此产生相应的控制电压信号。 单触发电路在短暂的预定时间周期内将与每个平滑电路相关联的连续可变时间常数的值临时减小到预定的最小值，使得相应的控制电压信号中的每一个迅速接近其对应的方向信息的值 在该时间段内的信号，当任何一个方向信息信号和其对应的控制电压信号之间的差超过预定阈值时，单触发激活。 环绕声处理器中还加入了其他改进以优化其性能。
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2.发明授权
公开(公告)号：US5666424A
公开(公告)日：1997-09-09
申请号：US637071
申请日：1996-04-24
摘要： A surround sound processor system for multichannel redistribution of stereophonic signals has digitally controlled gains in each input and each output channel, controlled by a microprocessor, which receives an input signal from a microphone placed at the preferred listening location within the listening area for automatically balancing the input signals and setting both input and output gains during a calibration process so as to provide the listener with the best possible surround sound reproduction of the stereophonic source material. As a visual aid, the microprocessor displays menus and messages on a video screen, and a visual display shows the relative levels of the six axes of control signals within the surround sound processor.
摘要翻译： 用于多声道重新分配立体声信号的环绕声处理器系统在每个输入和每个输出通道中具有数字控制的增益，其由微处理器控制，微处理器从放置在收听区域内的优选收听位置的麦克风接收输入信号，以自动平衡 输入信号，并在校准过程中设置输入和输出增益，以便向收听者提供立体声源材料的最佳环绕声再生。 作为视觉辅助，微处理器在视频屏幕上显示菜单和消息，视觉显示显示环绕声处理器内的六个控制信号轴的相对电平。
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3.发明授权Six-axis surround sound processor with improved matrix and cancellation control 失效六轴环绕声处理器，具有改进的矩阵和取消控制
公开(公告)号：US5625696A
公开(公告)日：1997-04-29
申请号：US631603
申请日：1996-04-02
申请人： James W. Fosgate
发明人： James W. Fosgate
摘要： A surround sound processor for redistribution of stereophonic audio signals into multiple channels for presentation on a plurality of loudspeakers surrounding a listener has an improved direction detector filter circuit, a peak hold circuit in the direction detector for better dynamic separation, improved time constants in the servologic circuit, improved linearity correction in the control voltage generator to match the characteristics of the new voltage controlled amplifiers which are applied to the separation matrix, a separation matrix having cancellation of unwanted signals wihtout gain modification for desired signal components, and improved shelf filters in the rear channel outputs.
摘要翻译： 用于将立体声音频信号重新分配到多个通道中用于呈现在围绕收听者的多个扬声器上的环绕声处理器具有改进的方向检测器滤波器电路，方向检测器中的峰值保持电路，用于更好的动态分离，改进的伺服系统中的时间常数 电路，改善控制电压发生器中的线性度校正以匹配施加到分离矩阵的新的电压控制放大器的特性，具有消除不想要的信号的分离矩阵，以及所需信号分量的增益修改以及改进的帧滤波器 后通道输出。
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公开(公告)号：US5504819A
公开(公告)日：1996-04-02
申请号：US276901
申请日：1994-07-18
申请人： James W. Fosgate
发明人： James W. Fosgate
摘要： A surround sound processor for presenting stereophonic audio signals on a number of loudspeakers surrounding a listening area, comprising an input matrix stage, a detector filter and matrix circuit, a direction detector circuit incorporating improved filters, a novel detector splitter circuit providing three direction signals from the two direction detector circuit outputs, a novel three-channel servologic circuit with improved variable filters responding selectively to the rates of change of the direction signals and providing six control voltage signals through linearity correction networks to six voltage-controlled amplifiers, the outputs of which are combined in an output matrix to provide a number of loudspeaker feed signals through buffer amplifiers to the output terminals of the processor. The detector splitter circuit is configurable to either a forward oriented a backward oriented mode of operation, corresponding changes being made to the voltage-controlled amplifiers and output matrix circuitry. Additionally the detector splitter may be switched to eliminate the third direction signal with corresponding changes to the output matrix circuitry.
摘要翻译： 一种环绕声处理器，用于在聆听区域周围的多个扬声器上呈现立体声音频信号，包括输入矩阵级，检测器滤波器和矩阵电路，包含改进的滤波器的方向检测器电路，提供来自 双向检测器电路输出，一种新颖的三通道伺服电路，具有改进的可变滤波器，其选择性地响应于方向信号的变化率，并通过线性校正网络向六个压控放大器提供六个控制电压信号，其输出 被组合在输出矩阵中以通过缓冲放大器向处理器的输出端提供多个扬声器馈送信号。 检测器分离器电路可配置为向前定向的向后定向操作模式，对压控放大器和输出矩阵电路进行相应的改变。 此外，检测器分离器可以被切换以消除第三方向信号，同时对输出矩阵电路进行相应的改变。
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公开(公告)号：US4932059A
公开(公告)日：1990-06-05
申请号：US142140
申请日：1988-01-11
申请人： James W. Fosgate
发明人： James W. Fosgate
IPC分类号： H04S3/02
CPC分类号： H04S3/02
摘要： An interface circuit for inclusion in the control signal path of a variable matrix decoder wherein the attack and decay time constants imposed on said control signals may be varied by means of an auxiliary circuit which responds to the total signal level applied to the decoder and to sudden changes thereof, thereby improving the dynamic performance of the variable matrix decoder.
摘要翻译： 一种用于包含在可变矩阵解码器的控制信号路径中的接口电路，其中施加在所述控制信号上的攻击和衰减时间常数可以通过辅助电路来改变，所述辅助电路响应于施加到解码器的总信号电平， 改变可变矩阵解码器的动态性能。
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公开(公告)号：US07280664B2
公开(公告)日：2007-10-09
申请号：US10362786
申请日：2001-08-30
IPC分类号： H04R5/00
CPC分类号： H04S3/02
摘要： A method derives at least three audio signals, each associated with a direction, from two input audio signals. In response to the two input signals, a passive matrix generates a plurality of passive matrix audio signals, including two pairs of passive matrix audio signals, a first pair of passive amtrix audio signals represent directions lying on a first axis and a second pair of passive matrix audio signals represent direction lying on a second axis, the first and second aces being substantially at ninety degrees to ach other. The pairs of passive matrix audio signals are processed to derive a plurality of matrix coefficients therefrom, The processing includes deriving a pair of intermediate signals and urging each pair of intermediate signals toward equality in response to a respective error signal. At least three output signals are produced by matrix multiplying the two input signals by the matrix coefficients.
摘要翻译： 一种方法从两个输入音频信号中导出至少三个音频信号，每个与方向相关联的音频信号。 响应于两个输入信号，无源矩阵产生多个无源矩阵音频信号，包括两对无源矩阵音频信号，第一对无源矩阵音频信号表示位于第一轴上的方向和第二对被动 矩阵音频信号表示位于第二轴上的方向，第一和第二个基本上相对于另一个相对于九十度。 无源矩阵音频信号对被处理以从中导出多个矩阵系数。该处理包括导出一对中间信号，并且响应于相应的误差信号推动每对中间信号朝向相等。 通过将两个输入信号矩阵乘以矩阵系数来产生至少三个输出信号。
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7.发明授权Control voltage generator multiplier and one-shot for integrated surround sound processor 失效集成环绕声处理器的控制电压发生器乘法器和单稳态
公开(公告)号：US5428687A
公开(公告)日：1995-06-27
申请号：US990660
申请日：1992-12-14
摘要： A surround sound processor for presentation of a stereophonic source program on a multiple loudspeaker array surrounding the listening area. The processor includes input signal conditioning and matrixing circuits, a control voltage generator responsive to the directional information contained in the stereophonic source signals, and a variable matrixing circuit for generating appropriate loudspeaker feed signals to create the illusion of the sound field wrapping around the listening area. The control voltage generator includes a servologic circuit employing variable time constant smoothing circuits each responsive to the difference signal between its input and its output and to a pulse signal from a one-shot triggered by threshold detectors which compare the difference signals with fixed threshold voltages. In one aspect, suitable for incorporation into an integrated circuit, a multiplier circuit and a controlled bidirectional current source charging and discharging a capacitor provides the smoothing function. Alternatively a symmetrical nonlinear resistive circuit or element is used to charge and discharge the capacitor. A novel and economical combined threshold detector and one-shot suitable for integrated circuits is also disclosed.
摘要翻译： 环绕声处理器，用于在围绕听音区域的多个扬声器阵列上呈现立体声源程序。 处理器包括输入信号调节和矩阵电路，响应于立体声源信号中包含的方向信息的控制电压发生器，以及用于产生适当的扬声器馈送信号以产生围绕听音区域包围的声场的错觉的可变矩阵电路 。 控制电压发生器包括采用可变时间常数平滑电路的伺服电路，每个电路响应于其输入和其输出之间的差信号以及来自阈值检测器触发的单触发脉冲信号，将差信号与固定阈值电压进行比较。 在一个方面，适合于并入集成电路，乘法器电路和对电容器充电和放电的受控双向电流源提供平滑功能。 或者，使用对称的非线性电阻电路或元件来对电容器进行充电和放电。 还公开了一种新颖且经济的组合阈值检测器和适用于集成电路的单触发器。
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8.发明授权Method for deriving at least three audio signals from two input audio signals 有权用于从两个输入音频信号导出至少三个音频信号的方法公开(公告)号：US06920223B1
公开(公告)日：2005-07-19
申请号：US09532711
申请日：2000-03-22
申请人： James W. Fosgate
发明人： James W. Fosgate
摘要： Various equivalent adaptive audio matrix arrangements are disclosed, each of which includes a feedback-derived control system that automatically causes the cancellation of undesired matrix crosstalk components in the matrix output. Each adaptive audio matrix arrangement includes a passive matrix that produces a pair of passive matrix signals in response to two input signals. A feedback-derived control system operates on each pair of passive matrix signals, urging the magnitudes of pairs of intermediate signals toward equality. Each control system includes variable gain elements and a feedback and comparison arrangement generating a pair of control signals for controlling the variable gain elements. Additional control signals may be derived from the two pairs of control signals for use in obtaining more than four output signals from the adaptive matrix.
摘要翻译： 公开了各种等效的自适应音频矩阵布置，每个等效的自适应音频矩阵布置包括反馈导出的控制系统，其自动地导致矩阵输出中的不希望的矩阵串扰分量的消除。 每个自适应音频矩阵布置包括无源矩阵，其响应于两个输入信号产生一对无源矩阵信号。 反馈导出的控制系统对每对无源矩阵信号进行操作，将中间信号对的幅度推向相等。 每个控制系统包括可变增益元件和产生用于控制可变增益元件的一对控制信号的反馈和比较装置。 可以从两对控制信号中导出附加的控制信号，以用于从自适应矩阵获得多于四个的输出信号。
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公开(公告)号：US5339363A
公开(公告)日：1994-08-16
申请号：US983645
申请日：1992-12-01
申请人： James W. Fosgate
发明人： James W. Fosgate
摘要： A method and apparatus for generating control voltage signals in a surround sound processor is disclosed which utilizes a one-shot monostable multivibrator for minimizing intermodulation distortion while following rapid directional changes, yet minimizing intermodulation distortion. The apparatus includes means for smoothing the directional information signals derived from audio input signals each with a continuously variable time constant to generate a corresponding control voltage signal, such that each time constant depends inversely upon the magnitude of the difference between the directional information signal applied thereto and the corresponding control voltage signal generated thereby. A one-shot means temporarily reduces the value of the continuously variable time constant associated with each of the smoothing means to a predetermined minimum value for a short, predetermined time period so that each of the corresponding control voltage signals rapidly approaches the value of its corresponding directional information signal within this time period, the one-shot being activated when the difference between any one of the directional information signals and its corresponding control voltage signal exceeds a predetermined threshold value. Other improvements are incorporated in the surround sound processor to optimize its performance.
摘要翻译： 公开了一种用于在环绕声处理器中产生控制电压信号的方法和装置，其利用单稳态单稳态多谐振荡器来最小化互调失真同时跟随快速方向改变，同时最小化互调失真。 该装置包括用于平滑从音频输入信号导出的方向信息信号的装置，每个方向信息信号具有连续可变的时间常数以产生相应的控制电压信号，使得每个时间常数与施加到其上的方向信息信号之间的差值的幅度成反比 并由此产生相应的控制电压信号。 一次性装置将与每个平滑装置相关联的连续可变时间常数的值临时减小到预定的一个较短时间段的预定最小值，使得相应的控制电压信号中的每一个迅速接近其对应的值 在该时间段内定向信息信号，当任一个方向信息信号和其相应的控制电压信号之间的差超过预定阈值时，单触发信号被激活。 环绕声处理器中还加入了其他改进以优化其性能。
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10.发明授权
公开(公告)号：US5307415A
公开(公告)日：1994-04-26
申请号：US967446
申请日：1992-10-28
申请人： James W. Fosgate
发明人： James W. Fosgate
IPC分类号： H04S5/02 , H04H5/00 , H04H20/89 , H04S3/00 , H04S3/02 , H04S5/00 , H04S7/00 , H04R5/00 , H03G3/00
摘要： A surround processor includes a time constant processing circuit for smoothing directional information signals from a detector with continuously variable time constants in order to generate one or more control voltage signals. The time constants produced by the circuit are continuously variable and responsive to both the rate of change and the amplitude of the directional information signals, such that as the difference between the controlled voltage signals and the directional information signals increases, the value of the time constants decreases to permit the control voltage signals to closely follow the directional information signals, and as the difference between the control voltage signals and the directional information signals decreases, the value of the time constants increases so that variations in the control voltage signals are smooth. Split-band processing of input audio signals to the processor is also accomplished without the necessity of placing filters directly in the audio path. A low-pass filter is utilized to separate out the low-frequency components of the input signals, and signal-dependent processing occurs with respect to the mid- and upper-frequency components only. Other improvements are also incorporated into the surround processor to optimize its performance.
摘要翻译： 环绕处理器包括时间常数处理电路，用于平滑来自具有连续可变时间常数的检测器的方向信息信号，以便产生一个或多个控制电压信号。 由电路产生的时间常数是连续可变的，并且响应于方向信息信号的变化率和幅度，使得随着受控电压信号和方向信息信号之间的差异增大，时间常数 减小以允许控制电压信号紧密地遵循方向信息信号，并且随着控制电压信号和方向信息信号之间的差减小，时间常数的值增加，使得控制电压信号的变化是平滑的。 输入音频信号到处理器的分频波段处理也是完成的，而不需要将滤波器直接放在音频路径中。 低通滤波器用于分离输入信号的低频分量，并且仅依赖于中频和高频分量发生信号相关处理。 环绕声处理器中也加入了其他改进以优化其性能。
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