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1.发明授权公开(公告)号：US07590250B2
公开(公告)日：2009-09-15
申请号：US10394783
申请日：2003-03-21
申请人： Richard Thompson Ellis , Heejong Yoo , David Wilson Graham , Paul Edward Hasler , David V. Anderson
发明人： Richard Thompson Ellis , Heejong Yoo , David Wilson Graham , Paul Edward Hasler , David V. Anderson
IPC分类号： H04B15/00
CPC分类号： H03G5/165 , G10L19/0204 , G10L21/0208 , G10L21/0232 , H03H21/0001 , H04B15/00
摘要： One preferred embodiment of the present invention provides systems and methods for removing noise from an input analog signal in continues time. Briefly described in architecture, one embodiment of the system, among others, can be implemented as follows. An analog filtering system including VLSI circuitry separates an analog input signal into a plurality of sub-band signals. Then, an analog gain system including VLSI circuitry calculates a gain for each sub-band signal that suppresses the noise within the sub-band signal. In some preferred embodiments, VLSI circuitry includes floating gate technology. Methods and other systems are also provided.
摘要翻译： 本发明的一个优选实施例提供了用于在连续时间内从输入模拟信号中去除噪声的系统和方法。 在架构中简要描述，系统的一个实施例等可以如下实现。 包括VLSI电路的模拟滤波系统将模拟输入信号分离成多个子带信号。 然后，包括VLSI电路的模拟增益系统计算抑制子带信号内的噪声的每个子带信号的增益。 在一些优选实施例中，VLSI电路包括浮动栅极技术。 还提供了方法和其他系统。
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公开(公告)号：US20100057454A1
公开(公告)日：2010-03-04
申请号：US12204608
申请日：2008-09-04
IPC分类号： G10L15/20
摘要： An echo canceller for improved recognition and removal of an echo from a communication device. The echo canceller can dynamically reduce echo using an improved energy estimator and an improved adaptive filter. The improved energy estimator can determine if conversation is in a single talk period or a double talk period based on the combined energy of both the near end background noise and speech. The improved adaptive filter can reduce echo by dynamically changing adaptation speed or step size. In double talk, the adaptive filter(s) can dynamically slow-down or stop adaptation. In single talk, the filter can dynamically increase the speed of adaptation to improve accuracy, or decrease adaptation speed for stability.
摘要翻译： 用于改善来自通信设备的回波的识别和去除的回波消除器。 回波消除器可以使用改进的能量估计器和改进的自适应滤波器来动态地减少回波。 改进的能量估计器可以基于近端背景噪声和语音的组合能量来确定对话是处于单个通话周期还是双重通话周期。 改进的自适应滤波器可以通过动态地改变自适应速度或步长来减少回波。 在双语中，自适应滤波器可以动态地减慢或停止适应。 在单声道中，滤波器可以动态地提高适应速度，以提高精度，或者降低适应速度以获得稳定性。
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3.发明授权公开(公告)号：US08725520B2
公开(公告)日：2014-05-13
申请号：US12204593
申请日：2008-09-04
CPC分类号： G10L19/16 , G06F1/3203 , G06F3/162 , H04W52/0274
摘要： Power savings in a mobile device is accomplished by generating audio samples by decoding a bitstream with a decoding system within the mobile device. The generated audio samples are transferred into at least one memory bank in a set of memory banks in a power saver block within the mobile device. Parts of the decoding system not involved in the storing of the generated audio samples are switched off after batch decoding a bitstream associated with multiple audio frames. The bitstream includes bits less than that found in one audio file. At least one of the memory banks in the set of memory banks is power collapsible. The fetching of the decoded by the decoding system can be synchronized with a paging channel of a modem in the mobile device. The transferred audio samples is a lossless compression and may occur after a re-encoding.
摘要翻译： 移动设备中的功率节省通过利用移动设备内的解码系统对比特流进行解码来生成音频样本来实现。 生成的音频样本被传送到移动设备内的节电块中的一组存储器组中的至少一个存储体。 在对与多个音频帧相关联的比特流进行批量解码之后，不涉及生成的音频样本的存储的部分解码系统被关闭。 比特流包括比在一个音频文件中发现的比特小的比特。 存储器组中的至少一个存储体是电源可折叠的。 由解码系统解码的提取可以与移动设备中的调制解调器的寻呼信道同步。 传输的音频样本是无损压缩，并且可能在重新编码之后发生。
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公开(公告)号：US09112989B2
公开(公告)日：2015-08-18
申请号：US13076242
申请日：2011-03-30
申请人： Te-Won Lee , Khaled Helmi El-Maleh , Heejong Yoo , Jongwon Shin
发明人： Te-Won Lee , Khaled Helmi El-Maleh , Heejong Yoo , Jongwon Shin
CPC分类号： G11B20/10527 , G10L17/00 , G10L25/78 , G10L2015/088 , G11B2020/10546 , H04M1/6008 , H04M1/656 , H04M1/7255
摘要： A mobile device that is capable of automatically starting and ending the recording of an audio signal captured by at least one microphone is presented. The mobile device is capable of adjusting a number of parameters related with audio logging based on the context information of the audio input signal.
摘要翻译： 提供能够自动开始和结束由至少一个麦克风捕获的音频信号的记录的移动设备。 移动设备能够基于音频输入信号的上下文信息来调整与音频记录相关的多个参数。
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公开(公告)号：US08600038B2
公开(公告)日：2013-12-03
申请号：US12204608
申请日：2008-09-04
摘要： An echo canceller for improved recognition and removal of an echo from a communication device. The echo canceller can dynamically reduce echo using an improved energy estimator and an improved adaptive filter. The improved energy estimator can determine if conversation is in a single talk period or a double talk period based on the combined energy of both the near end background noise and speech. The improved adaptive filter can reduce echo by dynamically changing adaptation speed or step size. In double talk, the adaptive filter(s) can dynamically slow-down or stop adaptation. In single talk, the filter can dynamically increase the speed of adaptation to improve accuracy, or decrease adaptation speed for stability.
摘要翻译： 用于改善来自通信设备的回波的识别和去除的回波消除器。 回波消除器可以使用改进的能量估计器和改进的自适应滤波器来动态地减少回波。 改进的能量估计器可以基于近端背景噪声和语音的组合能量来确定对话是处于单个通话周期还是双重通话周期。 改进的自适应滤波器可以通过动态地改变自适应速度或步长来减少回波。 在双语中，自适应滤波器可以动态地减慢或停止适应。 在单声道中，滤波器可以动态地提高适应速度，以提高精度，或者降低适应速度以获得稳定性。
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公开(公告)号：US20050201457A1
公开(公告)日：2005-09-15
申请号：US11076741
申请日：2005-03-10
申请人： Daniel Allred , David Anderson , Walter Huang , Venkatesh Krishnan , Heejong Yoo
发明人： Daniel Allred , David Anderson , Walter Huang , Venkatesh Krishnan , Heejong Yoo
IPC分类号： H03K5/159
CPC分类号： H03H21/0012
摘要： Systems and methods for very high throughput adaptive filtering using distributed arithmetic are disclosed. One distributed arithmetic adaptive filter may include a memory for storing a first and second lookup table. The first lookup table may include 2K filter weights addressed by the rightmost bits of each of K signal samples stored in a plurality of registers. The filter may include a controller configured to update the second lookup table with each possible combination of the sums of the K most recent input samples and update each of the 2K filter weights of the first lookup table based on the combination of the sums of the K most recent input samples stored in the second lookup table. The second lookup-table may be updated during a filtering operation that uses the first lookup-table. One filter may include a plurality of sub-filters with each sub-filter having first and second lookup tables.
摘要翻译： 公开了使用分布式算术进行非常高吞吐量自适应滤波的系统和方法。 一个分布式算术自适应滤波器可以包括用于存储第一和第二查找表的存储器。 第一查找表可以包括由存储在多个寄存器中的K个信号样本中的每一个的最右边比特寻址的2K个滤波器权重。 滤波器可以包括控制器，其被配置为利用K个最新输入样本的和的每个可能的组合来更新第二查找表，并且基于以下来更新第一查找表的两个滤波器权重中的每一个： 存储在第二查找表中的K个最新输入样本的总和的组合。 可以在使用第一查找表的过滤操作期间更新第二查找表。 一个滤波器可以包括多个子滤波器，每个子滤波器具有第一和第二查找表。
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7.发明授权Systems and methods for double-talk detection in acoustically harsh environments 失效在声学恶劣环境中进行双方通话检测的系统和方法公开(公告)号：US08498407B2
公开(公告)日：2013-07-30
申请号：US12326868
申请日：2008-12-02
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A communications device that is configured to detect double talk is described. An echo canceller is configured to cancel an echo from an input signal using an adaptive filter. A double-talk detector provides a double-talk statistic. The double-talk statistic is proportional to the ratio of the remaining echo energy in the cancellation error signal and the total cancellation error energy.
摘要翻译： 描述配置成检测双方通话的通信设备。 回声消除器被配置为使用自适应滤波器从输入信号中消除回波。 双向通话检测器提供双方通话统计。 双向统计量与抵消误差信号中的剩余回波能量与总消除误差能量的比例成比例。
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8.发明申请公开(公告)号：US20100135483A1
公开(公告)日：2010-06-03
申请号：US12326868
申请日：2008-12-02
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A communications device that is configured to detect double talk is described. An echo canceller is configured to cancel an echo from an input signal using an adaptive filter. A double-talk detector provides a double-talk statistic. The double-talk statistic is proportional to the ratio of the remaining echo energy in the cancellation error signal and the total cancellation error energy.
摘要翻译： 描述配置成检测双方通话的通信设备。 回声消除器被配置为使用自适应滤波器从输入信号中消除回波。 双向通话检测器提供双方通话统计。 双向统计量与抵消误差信号中的剩余回波能量与总消除误差能量的比例成比例。
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9.发明申请METHOD, SYSTEM, AND APPARATUS FOR COMPRESSION OR DECOMPRESSION OF DIGITAL SIGNALS 审中-公开用于数字信号的压缩或解压缩的方法，系统和装置公开(公告)号：US20100017196A1
公开(公告)日：2010-01-21
申请号：US12504592
申请日：2009-07-16
申请人： Sang-Uk Ryu , Samir K. Gupta , Philip Rutschman , Heejong Yoo
发明人： Sang-Uk Ryu , Samir K. Gupta , Philip Rutschman , Heejong Yoo
IPC分类号： G10L19/00
CPC分类号： G10L19/0017 , G10L19/04 , H03M7/50
摘要： Embodiments of methods, apparatuses, devices and systems associated with compression and decompression of digital signals are disclosed.
摘要翻译： 公开了与数字信号的压缩和解压缩有关的方法，设备，设备和系统的实施例。
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10.发明申请公开(公告)号：US20090070119A1
公开(公告)日：2009-03-12
申请号：US12204593
申请日：2008-09-04
IPC分类号： G10L19/00
CPC分类号： G10L19/16 , G06F1/3203 , G06F3/162 , H04W52/0274
摘要： Power savings in a mobile device is accomplished by generating audio samples by decoding a bitstream with a decoding system within the mobile device. The generated audio samples are transferred into at least one memory bank in a set of memory banks in a power saver block within the mobile device. Parts of the decoding system not involved in the storing of the generated audio samples are switched off after batch decoding a bitstream associated with multiple audio frames. The bitstream includes bits less than that found in one audio file. At least one of the memory banks in the set of memory banks is power collapsible. The fetching of the decoded by the decoding system can be synchronized with a paging channel of a modem in the mobile device. The transferred audio samples is a lossless compression and may occur after a re-encoding.
摘要翻译： 移动设备中的功率节省通过利用移动设备内的解码系统对比特流进行解码来生成音频样本来实现。 生成的音频样本被传送到移动设备内的节电块中的一组存储器组中的至少一个存储体。 在对与多个音频帧相关联的比特流进行批量解码之后，不涉及生成的音频样本的存储的部分解码系统被关闭。 比特流包括比在一个音频文件中发现的比特小的比特。 存储器组中的至少一个存储体是电源可折叠的。 由解码系统解码的提取可以与移动设备中的调制解调器的寻呼信道同步。 传输的音频样本是无损压缩，并且可能在重新编码之后发生。
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