专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20190123841A1 Audio Processor Apparatus, Methods and Computer Program Products Using Integrated Diversity Delay Error Compensation 审中-公开
公开(公告)号：US20190123841A1
公开(公告)日：2019-04-25
申请号：US15790785
申请日：2017-10-23
申请人： Wheatstone Corporation
发明人： Jeffrey Allan Keith
IPC分类号： H04H20/18 , H04H20/72 , H04H20/48
CPC分类号： H04H20/18 , H04H20/48 , H04H20/72 , H04H2201/183
摘要： An audio processor includes a detector configured to determine a correlation of first and second data corresponding to an analog FM component and an HD FM component, respectively, of a broadcast RF signal. A signal processor is configured to receive an input audio signal, to generate an analog FM audio signal and an HD FM audio signal therefrom and to control a relative timing of the analog FM audio signal and the HD FM audio signal based on the determined correlation. The signal processor may include a multiband limiter configured to generate a multiband limited audio signal responsive to the input audio signal, an HD FM audio processor configured to generate the HD FM audio signal responsive to the multiband limited audio signal, and an analog FM audio processor configured to generate the analog FM audio signal responsive to the multiband limited audio signal and to delay the analog FM audio signal responsive to the timing control signal.

2. 发明授权

US07991093B2 Analog/digital circuit 失效
标题翻译：模拟/数字电路
公开(公告)号：US07991093B2
公开(公告)日：2011-08-02
申请号：US12028176
申请日：2008-02-08
申请人： Koji Saito , Hisashi Furumoto
发明人： Koji Saito , Hisashi Furumoto
IPC分类号： H04L7/00
CPC分类号： H04L27/122 , H04H20/48 , H04H2201/13
摘要： A digital filter operates on the basis of a first clock having a first frequency. A stereo modulator operates on the basis of a second clock having a second frequency higher than the first frequency and being asynchronous. The stereo modulator performs a predetermined process on output data of the digital filter. A frequency modulator operates on the basis of a third clock having a third frequency whose origin is the same as that of the second clock, and performs frequency modulation on an output signal of the second digital computing unit. A sampling converter receives output data having the first frequency from the digital filter, converts a sampling frequency to data synchronized with the second clock, and outputs the obtained data to the stereo modulator.
摘要翻译：数字滤波器基于具有第一频率的第一时钟进行操作。立体声调制器基于具有高于第一频率的第二频率并且是异步的第二时钟来操作。立体声调制器对数字滤波器的输出数据执行预定处理。频率调制器基于具有与第二时钟相同的第三频率的第三时钟进行操作，并对第二数字计算单元的输出信号执行频率调制。采样转换器从数字滤波器接收具有第一频率的输出数据，将采样频率转换为与第二时钟同步的数据，并将获得的数据输出到立体声调制器。

3. 发明授权

US07920835B2 FM transmitter 有权
标题翻译： FM发射机
公开(公告)号：US07920835B2
公开(公告)日：2011-04-05
申请号：US11460968
申请日：2006-07-28
申请人： Hiroshi Miyagi
发明人： Hiroshi Miyagi
IPC分类号： H04B1/06
CPC分类号： H04H20/88 , H03C3/40 , H04H20/48 , H04H20/72
摘要： An FM transmitter with improved degree of freedom in parts selection comprises: an oscillator connected with a crystal oscillator; a clock generating circuit uses a signal formed by frequency-dividing an oscillator output as a reference frequency, and which generates a clock having a frequency of an integer multiple of the frequency of the reference frequency; a DSP operates synchronously with the clock performing stereo modulation processing, FM modulation processing, and IQ modulation processing to inputted stereo data by digital processing; a frequency synthesizer generates a reference having a frequency an integer multiple of the frequency of the reference; mixers which mix signals outputted from the DSP with signals generated by the frequency synthesizer, respectively; an adder which adds outputs of the mixers; and an amplifier which amplifies an output signal of the adder and transmits the amplified signal from an antenna.
摘要翻译：具有提高零件选择自由度的FM发射器包括：与晶体振荡器连接的振荡器; 时钟发生电路使用通过对振荡器输出进行分频而形成的信号作为参考频率，并且生成具有参考频率的频率的整数倍的频率的时钟; DSP通过数字处理与输入立体声数据的时钟同步执行立体声调制处理，FM调制处理和IQ调制处理; 频率合成器产生具有参考频率的整数倍的频率的参考; 将从DSP输出的信号与由频率合成器产生的信号分别混合的混频器; 加法器，其添加混频器的输出; 以及放大器，其放大加法器的输出信号并从天线发射放大的信号。

4. 发明授权

US07912153B2 System and method of performing digital multi-channel audio signal decoding 有权
标题翻译：执行数字多声道音频信号解码的系统和方法
公开(公告)号：US07912153B2
公开(公告)日：2011-03-22
申请号：US11426836
申请日：2006-06-27
申请人： David Chaohua Wu , Hoang Nhu , Russ Lambert , Alexander G. MacInnis , Ronald Crochiere
发明人： David Chaohua Wu , Hoang Nhu , Russ Lambert , Alexander G. MacInnis , Ronald Crochiere
IPC分类号： H04L27/06 , H04B1/10
CPC分类号： H04N7/06 , H04H20/48 , H04N5/602 , H04N5/607 , H04N21/8106 , H04N21/85406 , H04R5/04
摘要： A system and method are disclosed for performing digital multi-channel decoding of a BTSC composite audio signal. Each subsequent stage of the digital multi-channel decoding process is performed at the lowest sampling rate that yields acceptable performance for that stage. Analog-to-digital conversion of the composite audio signal is performed first to generate a composite digital audio signal. After analog-to-digital conversion, all signal processing may be performed in the digital domain. The composite digital audio signal is digitally filtered to frequency compensate for variations caused by previous stages of processing, including IF demodulation. Digital channel demodulation and filtering are performed to isolate single channels of the composite digital audio signal such as SAP, L−R, and L+R channels. SAP and L−R channels are DBX decoded resulting in corresponding decoded signals using a unique combination of digital filters that are an efficient translation of a corresponding combination of analog filters.
摘要翻译：公开了一种用于对BTSC复合音频信号执行数字多声道解码的系统和方法。数字多通道解码过程的每个后续阶段以最低的采样率执行，该阶段产生可接受的性能。首先执行复合音频信号的模数转换以产生复合数字音频信号。在模数转换之后，可以在数字域中执行所有的信号处理。复合数字音频信号被数字滤波，以对由先前的处理阶段（包括IF解调）引起的变化进行频率补偿。执行数字信道解调和滤波以隔离诸如SAP，L-R和L + R信道的复合数字音频信号的单个信道。 SAP和L-R通道被DBX解码，从而产生相应的解码信号，其使用数字滤波器的独特组合，其是模拟滤波器的相应组合的有效转换。

5. 发明授权

US07873171B2 Multichannel spectral mapping audio apparatus and method 有权
公开(公告)号：US07873171B2
公开(公告)日：2011-01-18
申请号：US11746000
申请日：2007-05-08
申请人： Terry D. Beard
发明人： Terry D. Beard
IPC分类号： H04R5/00 , G10L19/00
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.

6. 发明授权

US07783052B2 Multichannel spectral mapping audio apparatus and method 有权
公开(公告)号：US07783052B2
公开(公告)日：2010-08-24
申请号：US11745871
申请日：2007-05-08
申请人： Terry D. Beard
发明人： Terry D. Beard
IPC分类号： H04R5/00 , G10L19/00
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.

7. 发明申请

US20090310790A1 Transmission of Audio Signals 有权
标题翻译：音频信号的传输
公开(公告)号：US20090310790A1
公开(公告)日：2009-12-17
申请号：US12140710
申请日：2008-06-17
申请人： Lee Corey Sinton , Neil Briffett
发明人： Lee Corey Sinton , Neil Briffett
IPC分类号： H04H20/88
CPC分类号： H04H20/48 , H04H20/61
摘要： In accordance with an example embodiment of the present invention, an apparatus is presented that comprises a multichannel audio transmitter which has a first mode for transmitting a multichannel audio signal and a second mode for transmitting at least a first and a second audio signal, each having fewer channels than the multichannel audio transmitter. A controller is configured to switch the multichannel audio transmitter from the first mode to the second mode when the first audio signal becomes available.
摘要翻译：根据本发明的示例性实施例，提出了一种装置，其包括具有用于发送多声道音频信号的第一模式的多声道音频发送器和用于发送至少第一和第二音频信号的第二模式，每个音频信号具有比多声道音频发射机的通道少。控制器被配置为当第一音频信号变得可用时将多声道音频发射器从第一模式切换到第二模式。

8. 发明授权

US07515889B2 Scaling adjustment using pilot signal 有权
标题翻译：使用导频信号进行缩放调整
公开(公告)号：US07515889B2
公开(公告)日：2009-04-07
申请号：US11011567
申请日：2004-12-14
申请人： David Chaohua Wu
发明人： David Chaohua Wu
IPC分类号： H04B7/00 , H04B17/00 , H04N5/60 , H04H20/47 , H04H40/54
CPC分类号： H04N5/607 , H04H20/48 , H04N5/602 , H04N21/8106 , H04N21/85406
摘要： A demodulator (10) converts television signals to video baseband signals and audio baseband signals including stereo signals representing a right channel signal value, a left channel signal value and a pilot signal having an amplitude. A DSP (60) recursively finds a coefficient value for scaling that keeps the pilot signal amplitude within a range of values, there by improving baseband signal quality, such as stereo separation of stereo signals within the baseband signals.
摘要翻译：解调器（10）将电视信号转换为视频基带信号和音频基带信号，包括表示右声道信号值，左声道信号值和具有振幅的导频信号的立体声信号。 DSP（60）递归地找到用于缩放的系数值，其通过改善基带信号质量（例如基带信号内的立体声信号的立体声分离）来将导频信号幅度保持在值的范围内。

9. 发明申请

US20090028346A1 FM stereo transmitter and a digitized frequency modulation stereo multiplexing circuit thereof 审中-公开
标题翻译： FM立体声发射机及其数字化调制立体声复用电路
公开(公告)号：US20090028346A1
公开(公告)日：2009-01-29
申请号：US12009961
申请日：2008-01-23
申请人： Tain-Rein Chen , Wan-Jung Lin , Shih-Bin Wen , Chien-Shan Chiang
发明人： Tain-Rein Chen , Wan-Jung Lin , Shih-Bin Wen , Chien-Shan Chiang
IPC分类号： H04H20/48
CPC分类号： H04H20/48
摘要： A digitized FM (frequency modulation) stereo multiplexing circuit for an FM stereo transmitter has a digital audio I/O interface, a digitized FM stereo multiplexing circuit, a low-pass filter and an FM circuit. When a digital audio data is inputted, a digital audio decoder decodes the digital audio data to acquire left and right channel audio signals. The left and right channel audio signals are inputted to an over-sampling unit circuits to process sampling and then to output to an FM stereo multiplexer. The FM stereo multiplexer then generates a master signal and a secondary signal by processing the sampled left and right channel audio signals. In the meanwhile a switch signal and a pilot signal are acquired with an address counter to output from a memory unit. Then the master signal, the secondary signal and the pilot signal are combined as the digital FM stereo data.
摘要翻译：用于FM立体声发射机的数字化FM（频率调制）立体声复用电路具有数字音频I / O接口，数字化FM立体声多路复用电路，低通滤波器和FM电路。当输入数字音频数据时，数字音频解码器解码数字音频数据以获取左右声道音频信号。左声道和右声道音频信号被输入到过采样单元电路以处理采样，然后输出到FM立体声多路复用器。 FM立体声多路复用器然后通过处理采样的左声道和右声道音频信号来产生主信号和次信号。同时，用存储器单元输出的地址计数器获取开关信号和导频信号。然后将主信号，次信号和导频信号组合为数字FM立体声数据。

10. 发明申请

US20080298456A1 Hybrid Digital Digital/Analog Fm Multiplexer Transmitter 审中-公开
标题翻译：混合数字数字/模拟Fm多路复用器发射机
公开(公告)号：US20080298456A1
公开(公告)日：2008-12-04
申请号：US12095903
申请日：2006-12-02
申请人： John R. Haggis , John Glissman , Arthur L. Cohen
发明人： John R. Haggis , John Glissman , Arthur L. Cohen
IPC分类号： H03K7/08
CPC分类号： H04H20/34 , H04H20/48
摘要： An audio circuit digitizes raw analog input and uses a digital signal processor (DSP) to filter, modulate, and mix the input to produce a multiplex composite signal. The multiplex composite signal is output from the DSP through a digital/analog converter (DAC), and modulates a conventional FM RF stage. In a first preferred, hydrid embodiment, the composite signal is output from the DSP through a digital/analog converter (DAC), and modulates a conventional FM RF stage. In a second preferred, fully digital embodiment, carrier modulation takes place in the DSP, and FM modulated RF is output via a fast DAC for final filtering and radiation.
摘要翻译：音频电路将原始模拟输入数字化，并使用数字信号处理器（DSP）对输入进行滤波，调制和混合，以产生复用复合信号。复用复合信号通过数模转换器（DAC）从DSP输出，并调制常规FM RF级。在第一优选实施例中，复合信号通过数字/模拟转换器（DAC）从DSP输出，并且调制常规FM RF级。在第二优选的全数字实施例中，在DSP中进行载波调制，并且FM调制RF通过快速DAC输出以用于最终滤波和辐射。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式