公开(公告)号：US08625809B2

公开(公告)日：2014-01-07

申请号：US12784143

申请日：2010-05-20

Applicant: Olafur Mar Josefsson ,  Jens Gaarde Henriksen

Inventor： Olafur Mar Josefsson ,  Jens Gaarde Henriksen

IPC: H04H40/54 ,  H04R1/20

CPC classification number: H04R3/00 ,  H04R3/06 ,  H04R19/005 ,  H04R19/016 ,  H04R19/04

Abstract: A switch control circuit monitors a signal produced by a MEMS or other capacitor microphone. When a criterion is met, for example when the amplitude of the monitored signal exceeds a threshold or the monitored signal has been clipped or analysis of the monitored signal indicates clipping is imminent or likely, the switch control circuit operates one or more switches so as to selectively connect one or more capacitors to a signal line from the microphone, i.e., so as to connect a selected capacitance to the signal line to attenuate the signal from the microphone and, therefore, avoid clipping. The switches may be MOSFET, MEMS or other types of switches co-located with the microphone in a common semiconductor package. Similarly, the capacitors, a circuit that processes the signals from the microphone and/or the switch control circuit may be co-located with the microphone in a common semiconductor package.

Abstract translation: 开关控制电路监视由MEMS或其他电容器麦克风产生的信号。 当满足标准时，例如当监视信号的幅度超过阈值或被监视信号被限幅或者监视信号的分析指示剪切即将或可能时，开关控制电路操作一个或多个开关，以便 选择性地将一个或多个电容器连接到来自麦克风的信号线，即，将所选择的电容连接到信号线以衰减来自麦克风的信号，并因此避免限幅。 这些开关可以是MOSFET，MEMS或其它类型的开关，其与麦克风在共同的半导体封装中共同定位。 类似地，电容器，处理来自麦克风和/或开关控制电路的信号的电路可以与公共半导体封装中的麦克风共同定位。

公开(公告)号：US08295495B1

公开(公告)日：2012-10-23

申请号：US11871773

申请日：2007-10-12

Applicant: Chris Cheng-Chieh Lee

Inventor： Chris Cheng-Chieh Lee

IPC: H04H40/81 ,  H04H20/47 ,  H04H20/88 ,  H04H40/36 ,  H04H40/54 ,  H04H40/72 ,  H04B1/10 ,  H04B1/06 ,  H04B7/00 ,  H04B1/16

CPC classification number: H04B1/1653 ,  H04B1/1646 ,  H04H40/45 ,  H04H40/72 ,  H04H40/81 ,  H04R29/00 ,  H04S7/301

Abstract: An FM audio receiver can include a mono/stereo detector that causes the audio receiver to output either a monophonic or a stereophonic signal based on a received pilot tone energy. An accurate operation of the receiver, including but not limited to correct decoding of monophonic/stereophonic reception, can be based on the receiver operating with the same rated maximum system deviation (RMSD) as the received signal itself. Aspects of the disclosure describe a system and method of detecting and matching a receiver's RMSD to that of a received signal by demodulating a carrier bearing a an input signal over a first bandwidth, extracting a pilot energy signal from the input signal, and demodulating the carrier bearing the input signal over a second bandwidth if the pilot energy signal is within a pilot energy range for a first predetermined amount of time.

Abstract translation: FM音频接收器可以包括单声道/立体声检测器，其使得音频接收器基于接收到的导频音能量输出单声道或立体声信号。 接收机的精确操作，包括但不限于单声道/立体声接收的正确解码，可以基于接收器以与接收信号本身相同的额定最大系统偏差（RMSD）来操作。 本公开的方面描述了通过在第一带宽上解调承载输入信号的载波来检测和接收接收机的RMSD与接收信号的RMSD相匹配的系统和方法，从输入信号中提取导频能量信号，并解调载波 如果导频能量信号在第一预定时间量内的导频能量范围内，则承载输入信号在第二带宽上。

公开(公告)号：US08139772B1

公开(公告)日：2012-03-20

申请号：US11871777

申请日：2007-10-12

Applicant: Chris Cheng-Chieh Lee

Inventor： Chris Cheng-Chieh Lee

IPC: H04H40/81 ,  H04H40/54 ,  H04H40/72

CPC classification number: H04B1/1653 ,  H04B1/1646 ,  H04H40/45 ,  H04H40/72 ,  H04H40/81 ,  H04R29/00 ,  H04S7/301

Abstract: A receiver may estimate a channel condition based on a difference between a pilot energy signal and a filtered pilot energy signal. The receiver may further switch to a stereophonic mode when both the difference and an energy level of the pilot energy signal satisfy a predetermined requirement of the receiver, and switch to a monophonic mode when either the difference or the energy level of the pilot energy signal fail to satisfy the predetermined requirement of the receiver.

Abstract translation: 接收机可以基于导频能量信号和滤波的导频能量信号之间的差来估计信道状况。 当导频能量信号的差异和能量水平都满足接收机的预定要求时，接收机可以进一步切换到立体声模式，并且当导频能量信号的差值或能量级别失败时，接收机可以切换到单声道模式 以满足接收机的预定要求。

公开(公告)号：US08111829B2

公开(公告)日：2012-02-07

申请号：US11876947

申请日：2007-10-23

Applicant: Ki-hyun Choo ,  Eun-mi Oh ,  Jung-hoe Kim ,  Boris Kudryashov ,  Sergey Petrov

Inventor： Ki-hyun Choo ,  Eun-mi Oh ,  Jung-hoe Kim ,  Boris Kudryashov ,  Sergey Petrov

IPC: H04H40/54

CPC classification number: G10L19/008 ,  H04H20/88 ,  H04H20/89 ,  H04S3/00 ,  H04S2420/03

Abstract: Provided are a method and apparatus for encoding and decoding a stereo signal or a multi-channel signal. According to the method and apparatus, a stereo signal or a multi-channel signal can be encoded and/or decoded by generating parameters based on a mono signal.

Abstract translation: 提供了一种用于对立体声信号或多声道信号进行编码和解码的方法和装置。 根据该方法和装置，可以通过基于单声道信号产生参数来对立体声信号或多声道信号进行编码和/或解码。

公开(公告)号：US07664271B2

公开(公告)日：2010-02-16

申请号：US11191949

申请日：2005-07-29

Applicant: Masao Suzaki ,  Yoshinori Katou

Inventor： Masao Suzaki ,  Yoshinori Katou

IPC: H04H40/54 ,  H04R5/00 ,  G06F17/00

CPC classification number: H04S1/002

Abstract: A method for processing sound signal including an L side enhanced difference signal comprising a sum of a signal being removed low frequency component from L−R signal and an L+R signal, an R side enhanced difference signal comprising a sum of a signal being removed low frequency component from R−L signal and an R+L signal, an L side output signal comprising a subtraction of signals, in which said R side enhanced difference signal being delayed to remove low and high ranges and amplified by a predetermined amplifying rate for a purpose of cross cancellation talk is subtracted from said L side enhanced difference signal and an R side output signal comprising a subtraction of signals, in which said L side enhanced difference signal being delayed to remove low and high ranges and amplified by a predetermined amplifying rate for a purpose of cross cancellation talk is subtracted from said R side enhanced difference signal.

Abstract translation: 一种用于处理包括L侧增强差分信号的声音信号的方法，包括从LR信号除去低频分量的信号和L + R信号之和，R侧增强差分信号，包括被除去的低频信号的和 来自RL信号的分量和R + L信号，L侧输出信号包括信号的减法，其中所述R侧增强差信号被延迟以去除低和高范围并且为了交叉的目的被放大预定的放大率 从所述L侧增强差分信号中减去消除通话，以及R侧输出信号，包括信号的减法，其中所述L侧增强差信号被延迟以去除低和高范围并且以预定的放大率放大，目的是 从所述R侧增强差分信号中减去交叉取消谈话。

公开(公告)号：US4620315A

公开(公告)日：1986-10-28

申请号：US698307

申请日：1985-02-05

Applicant: Toshiyuki Imagawa

Inventor： Toshiyuki Imagawa

IPC: H04B1/10 ,  H03J7/02 ,  H04B1/16 ,  H04H1/00 ,  H04H40/54 ,  H04H40/72 ,  H04H5/00

CPC classification number: H04H40/54 ,  H04B1/1669 ,  H04H40/72

Abstract: An automatic frequency control circuit is used in an FM stereo radio receiver which includes an intermediate frequency amplifying and detecting circuit producing an output for driving a signal meter and includes a multiplexer, so that the multiplexer effects controls to reduce noises in stereophonic and monophonic reception responsively to the signal meter driving circuit by changing its separation ratio and attenuation ratio. The circuit comprises: an adder which adds a dc voltage obtained by rectifying and smoothing ac components in the signal meter driving voltage to a dc voltage obtained by rectifying and smoothing noise components in an output from a noise cancellor; a comparator which compares the sum voltage from the adder with original dc components in the signal meter driving circuit; and a subtraction voltage generator which produces a subtraction voltage responsive to the difference between the compared two voltages, so that the noise reducing controls are effected responsively to the subtraction voltage.

Abstract translation: 在FM立体声无线电接收机中使用自动频率控制电路，其包括产生用于驱动信号计的输出的中频放大和检测电路，并且包括多路复用器，使得多路复用器实现控制以响应地减少立体声和单声道接收中的噪声 通过改变信号计的驱动电路的分离比和衰减比。 该电路包括：加法器，其将通过对信号计驱动电压中的交流分量进行整流和平滑获得的直流电压相加到通过对来自噪声消除器的输出中的噪声分量进行整流和平滑获得的直流电压; 将来自加法器的和电压与信号计驱动电路中的原始直流分量进行比较的比较器; 以及减法电压发生器，其响应于所比较的两个电压之间的差产生减法电压，使得降噪控制响应于减法电压来实现。

公开(公告)号：US4539697A

公开(公告)日：1985-09-03

申请号：US529773

申请日：1983-09-06

Applicant: Kohji Ishida ,  Tatsuo Numata ,  Masaharu Sakamoto

Inventor： Kohji Ishida ,  Tatsuo Numata ,  Masaharu Sakamoto

IPC: H03D1/22 ,  H04B1/16 ,  H04H1/00 ,  H04H40/45 ,  H04H40/54 ,  H04H5/00

CPC classification number: H04H40/54 ,  H03D1/2236 ,  H04B1/1646

Abstract: An FM stereo demodulating circuit comprising a pulse counter detector 1 for generating a pulse train signal including the frequency spectrum of the FM signal, DC biasing means for current biasing the detector output about a midpoint, a subcarrier signal generator 2 and current drivers 8, 10 for generating dual polarity biased subcarrier currents, first and second transistor pairs 3, 4, the emitters of each being connected to one of the current drivers, and the bases of the pairs being cross-connected to one of the biased detector outputs, at least one reference transistor pair whose emitters are connected to a current source 11 and whose collectors are connected to each of the biased detector outputs. The currents entering the cross-connected collectors of the first and second transistor pairs, when referenced against the currents into the emitters of the reference transistor pair, produce signals proportional to the right and left channels of the FM signal.

Abstract translation: 一种FM立体声解调电路，包括用于产生包括FM信号的频谱的脉冲串信号的脉冲计数器检测器1，用于电流偏置关于中点的检测器输出的DC偏置装置，副载波信号发生器2和电流驱动器8,10 为了产生双极性偏置子载波电流，第一和第二晶体管对3,4，每个的发射极连接到电流驱动器中的一个，并且对的基极至少与偏置的检测器输出之一交叉连接 一个参考晶体管对，其发射极连接到电流源11，并且其集电极连接到每个偏置的检测器输出。 当参考相对于参考晶体管对的发射极的电流时，进入第一和第二晶体管对的交叉集电极的电流产生与FM信号的右通道和左通道成比例的信号。

公开(公告)号：US10484115B2

公开(公告)日：2019-11-19

申请号：US16108355

申请日：2018-08-22

Applicant: Ibiquity Digital Corporation

Inventor： Russell Iannuzzelli ,  Adam Horowitz ,  Jeffrey R Detweiler ,  William E. Snelling

IPC: H04H20/18 ,  H04H20/95 ,  H04H20/48 ,  H04H40/54

Abstract: An apparatus comprises a digital input port configured to receive digital audio packets of main program service (MPS) audio; a modem operatively coupled to the digital port; an analog input port configured to receive an audio engineer society format (AES) audio signal that is a digitized version of the analog signal component of the frequency modulation (FM) hybrid radio signal; and an alignment unit configured to time-align the AES audio signal with the digital audio packets at the modem; wherein the modem is configured to generate the FM hybrid radio signal using the digital audio packets and the time-aligned AES audio signal.

公开(公告)号：US09712268B2

公开(公告)日：2017-07-18

申请号：US15071558

申请日：2016-03-16

Applicant: YAMAHA CORPORATION

Inventor： Kotaro Terada ,  Tomohiro Yamamoto

IPC: H04B1/00 ,  H04B3/00 ,  H04H40/54 ,  H04H60/04 ,  G06F3/16 ,  G06F3/0484

CPC classification number: H04H60/04 ,  G06F3/04847 ,  G06F3/04883 ,  G06F3/162

Abstract: In a group level control section, a largest output level among those in channels belonging to a relevant group is selected automatically as a group level. By operating a control part of a channel level control section displayed on a basic screen, an output level of an input channel corresponding to the operated channel level control section can be controlled. Further, by operating a control part of a group level control section, output levels of the input channels belonging to the group can be collectively controlled with difference in levels among the input channels being maintained.

公开(公告)号：US08843378B2

公开(公告)日：2014-09-23

申请号：US10883538

申请日：2004-06-30

Applicant: Juergen Herre ,  Sascha Disch ,  Johannes Hilpert ,  Christian Ertel ,  Andreas Hoelzer ,  Claus-Christian Spenger

Inventor： Juergen Herre ,  Sascha Disch ,  Johannes Hilpert ,  Christian Ertel ,  Andreas Hoelzer ,  Claus-Christian Spenger

IPC: G06F15/00 ,  G10L19/00 ,  G10L21/00 ,  H04H40/54 ,  H04R5/00 ,  H04S3/00 ,  G10L19/008

CPC classification number: H04S3/008 ,  G10L19/008 ,  H04S2420/03

Abstract: A multi-channel synthesizer includes a post processor for determining post processed reconstruction parameters or quantities derived from the reconstruction parameter for an actual time portion of the input signal so that the post processed reconstruction parameter or the post processed quantity is different from the corresponding quantized and inversely quantized reconstruction parameter in that the value of the post processed reconstruction parameter or the derived quantity is not bound by the quantization step size. A multi-channel reconstructor uses the post-processed reconstruction parameter for reconstructing the multi-channel output signal. By post processing reconstruction parameters in connection with multi-channel encoding/decoding allows a low data rate on the one hand and a high quality on the other hand, since strong changes in the reconstructed multi-channel output signal because of a large quantization step size for the reconstruction parameter, which is preferable because of low bit rate requirements, are reduced.

Abstract translation: 多通道合成器包括用于确定后处理的重构参数的后处理器或者对于输入信号的实际时间部分从重建参数导出的量，使得后处理的重构参数或后处理量与相应的量化和 反量化重建参数，因为后处理重构参数或导出量的值不受量化步长的约束。 多通道重建器使用后处理重构参数来重建多通道输出信号。 通过后处理，与多信道编码/解码相关的重构参数一方面允许低数据速率和高质量，因为由于大量化步长而导致的重构多通道输出信号的强烈变化 对于由于低比特率要求而优选的重构参数被减少。