公开(公告)号：US20080013743A1

公开(公告)日：2008-01-17

申请号：US11456999

申请日：2006-07-12

申请人： Hsiang-Hui Chang ,  Chih-Chien Huang ,  Chieh Hung Chen

发明人： Hsiang-Hui Chang ,  Chih-Chien Huang ,  Chieh Hung Chen

IPC分类号： H04H5/00

CPC分类号： H04H40/63 ,  H04B1/1653

摘要： A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.

摘要翻译： 立体声解码系统包括振荡器，带通滤波器，PLL单元和立体声解码器。 振荡器产生具有中心频率的第一信号。 带通滤波器接收立体声多路复用信号和第一信号以滤除导频信号。 PLL单元接收导频信号以产生PLL输出信号。 立体声解码器接收立体声多路复用信号和PLL输出信号，以分离来自立体声多路复用信号的左声道信号和右声道信号。

公开(公告)号：US20080008325A1

公开(公告)日：2008-01-10

申请号：US11482595

申请日：2006-07-08

申请人： Michael Holmstrom ,  Bengt Edholm ,  Sven Mattisson

发明人： Michael Holmstrom ,  Bengt Edholm ,  Sven Mattisson

IPC分类号： H04H5/00

CPC分类号： H04S1/00 ,  H04S7/00 ,  H04S7/30

摘要： A method and ASIC for canceling crosstalk between a first stereo channel and a second stereo channel, wherein a first signal is input to a first output amplifier for the first channel, and a second signal is input to a second output amplifier for the second channel, and an output load for each output amplifier is connected between each output amplifier and a reference amplifier. In one embodiment, the first and second signals are split prior to inputting the signals to the first and second output amplifiers, and a gain-adjusted portion of each signal is added to the other signal on the inputs of the output amplifiers. In another embodiment, the first and second input signals are again split into two paths each. While a first path of each signal is inputted to each signal's respective output amplifier, the second paths of the first and second signals are adding together. The resulting sum is adjusted by a gain function, biased by a suitable DC voltage, and input to the reference amplifier.

摘要翻译： 一种用于消除第一立体声通道和第二立体声通道之间的串扰的方法和ASIC，其中第一信号被输入到第一通道的第一输出放大器，第二信号被输入到用于第二通道的第二输出放大器， 并且每个输出放大器的输出负载连接在每个输出放大器和参考放大器之间。 在一个实施例中，在将信号输入到第一和第二输出放大器之前，第一和第二信号被分离，并且每个信号的增益调整部分被添加到输出放大器的输入端上的另一个信号。 在另一个实施例中，第一和第二输入信号又被分成两个路径。 当每个信号的第一路径被输入到每个信号的相应输出放大器时，第一和第二信号的第二路径被加在一起。 所得到的和通过增益函数调整，由适当的直流电压偏置，并输入到参考放大器。

公开(公告)号：US07292694B2

公开(公告)日：2007-11-06

申请号：US10225854

申请日：2002-08-22

申请人： Jens Wildhagen

发明人： Jens Wildhagen

IPC分类号： H04H5/00

CPC分类号： H04B1/1676 ,  H04H40/72

摘要： A method to denoise a stereo signal which comprises a stereo sum signal (Us(z)) and a stereo difference signal (Ud(z)), wherein a stereo to mono blending on basis of an attenuation of the stereo difference signal (Ud(z)) is performed, determines an attenuation of the stereo difference signal (Ud(z)) under consideration of the difference signal amplitude. Therefore, a stereo signal noise reducer which performs a stereo to mono blending on basis of an attenuation of the stereo difference signal, comprises an attenuation factor determination unit which determines an attenuation factor (Hatt) under consideration of the difference signal amplitude.

摘要翻译： 一种去噪立体声信号的方法，其包括立体声和信号（U S）（z）和立体声差分信号（U SUB）（z），其中立体声信号 执行基于立体声差分信号（U SUB（z））的衰减的单声道混合，确定立体声差分信号（U SUB）（z）的衰减 ））考虑差分信号幅度。 因此，基于立体声差分信号的衰减来执行立体声到单声道混合的立体声信号降噪器包括衰减因子确定单元，该衰减因子确定单元确定考虑到的衰减因子（HAT） 差信号幅度。

公开(公告)号：US20070242831A1

公开(公告)日：2007-10-18

申请号：US11403775

申请日：2006-04-13

申请人： Chieh Chen ,  Hsiang-Hui Chang ,  Chih-Chien Huang

发明人： Chieh Chen ,  Hsiang-Hui Chang ,  Chih-Chien Huang

IPC分类号： H04H5/00

CPC分类号： H04H40/54

摘要： A stereo decoder and a method therefor are provided. The stereo decoder receives a MPX signal from an FM demodulator, and comprises a first auto-calibration circuit, a band-pass filter, a second auto-calibration circuit, a slicer and a PLL circuit. The first auto-calibration circuit generates a first control signal. The band-pass filter generates the pilot signal by filtering the MPX signal with a center frequency set by the first control signal. The second auto-calibration circuit generates a second control signal. The slicer converts the pilot signal into a square wave signal. The PLL circuit comprises a voltage controlled oscillator for generating an oscillation frequency in response to the second control signal. The PLL circuit receives the square wave signal to generate the reference signal around the predetermined frequency in response to the oscillation frequency.

摘要翻译： 提供了一种立体声解码器及其方法。 立体声解码器从FM解调器接收MPX信号，并且包括第一自动校准电路，带通滤波器，第二自动校准电路，限幅器和PLL电路。 第一自动校准电路产生第一控制信号。 带通滤波器通过以由第一控制信号设置的中心频率对MPX信号进行滤波来生成导频信号。 第二自动校准电路产生第二控制信号。 切片器将导频信号转换成方波信号。 PLL电路包括用于响应于第二控制信号产生振荡频率的压控振荡器。 PLL电路接收方波信号，以响应于振荡频率产生围绕预定频率的参考信号。

公开(公告)号：US20070206810A1

公开(公告)日：2007-09-06

申请号：US11745853

申请日：2007-05-08

申请人： Terry Beard

发明人： Terry Beard

IPC分类号： H04H5/00

CPC分类号： H04H20/88 ,  G10L19/008 ,  G10L19/167 ,  H04H20/48 ,  H04H20/89 ,  H04H60/04 ,  H04S5/005 ,  H04S5/02 ,  H04S2420/07

摘要： A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional stereo signal on compact discs, FM radio, or other stereo or monaural delivery systems. The invention reduces the data rate needed for the transmission of multichannel digital audio.

公开(公告)号：US20070206804A1

公开(公告)日：2007-09-06

申请号：US11745992

申请日：2007-05-08

申请人： Terry Beard

发明人： Terry Beard

IPC分类号： H04H5/00

CPC分类号： H04H20/88 ,  G10L19/008 ,  G10L19/167 ,  H04H20/48 ,  H04H20/89 ,  H04H60/04 ,  H04S5/005 ,  H04S5/02 ,  H04S2420/07

摘要： A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional stereo signal on compact discs, FM radio, or other stereo or monaural delivery systems. The invention reduces the data rate needed for the transmission of multichannel digital audio.

公开(公告)号：US20070206803A1

公开(公告)日：2007-09-06

申请号：US11745991

申请日：2007-05-08

申请人： Terry Beard

发明人： Terry Beard

IPC分类号： H04H5/00

CPC分类号： H04H20/88 ,  G10L19/008 ,  G10L19/167 ,  H04H20/48 ,  H04H20/89 ,  H04H60/04 ,  H04S5/005 ,  H04S5/02 ,  H04S2420/07

摘要： A method and circuit for deriving a set of multichannel audio signals from a conventional monaural or stereo audio signal uses an auxiliary multichannel spectral mapping data stream. Audio can be played back in stereo and multichannel formats from a conventional stereo signal on compact discs, FM radio, or other stereo or monaural delivery systems. The invention reduces the data rate needed for the transmission of multichannel digital audio.

摘要翻译： 用于从常规单声道或立体声音频信号导出一组多声道音频信号的方法和电路使用辅助多声道频谱映射数据流。 音频可以以立体声和多声道格式从光盘，FM收音机或其他立体声或单声道传送系统上的常规立体声信号播放。 本发明降低了传输多声道数字音频所需的数据速率。

公开(公告)号：US20070041587A1

公开(公告)日：2007-02-22

申请号：US11332906

申请日：2006-01-17

申请人： Seung Yoon

发明人： Seung Yoon

IPC分类号： H04H5/00

CPC分类号： H04H60/27 ,  H04H40/18 ,  H04H60/43 ,  H04H60/65

摘要： Disclosed is a DAB (Digital Audio Broadcasting) modem interface for receiving multi-channel, which is capable of receiving two channels at once by providing a sub-channel filtering function to the DAB modem interface, and a method of operating the same. The DAB modem interface includes a serial interface for capturing channel data in bit stream data output from the DAB modem, buffer switching means for classifying the channel data captured by the serial interface for each channel and storing the classified channel data in two buffers assigned for each channel, and sub-channel filtering means for performing a sub-channel filtering operation of comparing a channel value acquired from the multimedia processor with a sub-channel ID value acquired in the course of capturing of the channel data, and generating control signals for controlling the serial interface to provide information on two channels to be captured and the buffer switching means to store data into the two buffers.

摘要翻译： 公开了一种用于接收多信道的DAB（数字音频广播）调制解调器接口，其能够通过向DAB调制解调器接口提供子信道过滤功能一次接收两个信道，以及一种操作该信道的方法。 DAB调制解调器接口包括用于捕获从DAB调制解调器输出的位流数据中的通道数据的串行接口，用于对每个通道的串行接口捕获的通道数据进行分类的缓冲器切换装置，并将分类的通道数据存储在为每个通道分配的两个缓冲器中 信道和子信道滤波装置，用于执行将从多媒体处理器获取的信道值与在信道数据的捕获过程中获取的子信道ID值进行比较的子信道滤波操作，以及产生控制信号 串行接口提供要捕获的两个通道的信息，缓冲区切换装置将数据存储到两个缓冲器中。

公开(公告)号：US20060274900A1

公开(公告)日：2006-12-07

申请号：US11499950

申请日：2006-08-07

申请人： David Griesinger

发明人： David Griesinger

IPC分类号： H04H5/00

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 that 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的声音再现系统，反之亦然。 包括一个解码器，其增强了所需方向上的输入信号的相关分量，并且减小了与编码方向无关的通道中的这种信号的强度，同时保持了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。

公开(公告)号：US20060210086A1

公开(公告)日：2006-09-21

申请号：US11081458

申请日：2005-03-16

申请人： Frederick Hilmer

发明人： Frederick Hilmer

IPC分类号： H04H5/00

CPC分类号： H04L69/329

摘要： A receiver is provided to allow remote control of presentation of content information at a plurality of distributed locations.

摘要翻译： 提供接收器以允许在多个分布位置处远程控制内容信息的呈现。