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公开(公告)号：US08660151B2
公开(公告)日：2014-02-25
申请号：US13497898
申请日：2010-09-22
CPC分类号： H04N7/52 , H04N21/236 , H04N21/23655 , H04N21/242
摘要： An encoding apparatus 2 includes: an encoding unit 21 that encodes and multiplexes a video signal V2, an audio signal A2 and a data signal D2 to be given to the encoding apparatus 2; a timer 22 that outputs time information T2; a timer adjusting unit 23 that adjusts the timer 22 so that the time information T2 and time information T1 within a multiplexed stream S1 outputted from an encoding apparatus 1 are synchronized with each other; and a multiplexing unit 24 that multiplexes the multiplexed stream S1, an encoded stream S21 outputted from the encoding unit 21 and the time information T2, and outputs the resultant multiplexed stream and information as output of the encoding apparatus 2. Third and subsequent encoding apparatus are configured to have the same configuration as that of the encoding apparatus 2.
摘要翻译： 编码装置2包括：编码单元21，对编码装置2给出的视频信号V2，音频信号A2和数据信号D2进行编码和复用; 输出时间信息T2的定时器22; 定时器调整单元23，其调整定时器22，使得从编码装置1输出的复用流S1内的时间信息T2和时间信息T1彼此同步; 以及复用单元24，多路复用流S1，从编码单元21输出的编码流S21和时间信息T2，并输出所生成的多路复用流和信息作为编码装置2的输出。第三和随后的编码装置 被配置为具有与编码装置2相同的配置。
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公开(公告)号：US08218757B2
公开(公告)日：2012-07-10
申请号：US11919333
申请日：2006-04-28
申请人： Masashi Takada
发明人： Masashi Takada
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo canceller, in which an adder adds a pseudo echo generated by an adaptive filter to an echo, so that the echo and the pseudo echo are canceled to each other, includes: a subband filter (8, 14) and a sampling converter (9, 15) for downsampling an audio signal; a selector switch (10, 16) which appropriately switches between a side performing the downsampling and another side performing fullband echo cancellation; and a tap arrangement controller (19) which optimizes a tap arrangement by using coefficients which are updated using a downsampled signal by the adaptive filter (11), the tap arrangement controller outputting the optimized tap arrangement to the adaptive filter (11) at time of the fullband echo cancellation.
摘要翻译： 一种回波消除器，其中加法器将由自适应滤波器产生的伪回声与回波相加，使得回波和伪回波彼此抵消，包括：子带滤波器（8,14）和采样转换器 9，15）用于对音频信号进行下采样; 选择器开关（10,16），其适当地在执行下采样的一侧和执行全频带回波消除的另一侧之间切换; 以及抽头布置控制器（19），其通过使用由自适应滤波器（11）使用下采样信号更新的系数来优化抽头布置，所述抽头布置控制器在所述自适应滤波器（11）的时间将所述优化的抽头布置输出到所述自适应滤波器 全频回波消除。
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公开(公告)号：US08090094B2
公开(公告)日：2012-01-03
申请号：US12085222
申请日：2006-11-24
申请人： Masashi Takada
发明人： Masashi Takada
IPC分类号： H04M9/08
CPC分类号： H04B3/23 , H04M1/2535
摘要： An echo canceller is capable of reducing echo feeling in a conversation even if a tone signal is input. The echo canceller of this invention judges whether a far-end input signal is a calling control tone signal or not, and if that is the case, resets a coefficient of an adaptive filter. An echo canceller of another aspect judges whether a far-end input signal is a predetermined kind of a tone signal or not, and stops the update of the coefficient of the adaptive filter if the result is affirmative and an amount of echo cancellation is not larger than a threshold value. Further, when the tone signal ends, the echo canceller compares amounts of echo cancellation before and after the end of the tone signal, in accordance with a result of the comparison, restart the update of the coefficient of the adaptive filter after resetting the coefficient of the adaptive filter, or restarts the update of the coefficient of the adaptive filter without resetting the coefficient of the adaptive filter. Moreover, notch filters may be provided to eliminate a tone signal frequency component at input stages of the adaptive filter and the adder for echo cancellation.
摘要翻译： 回声消除器即使输入了音调信号也能够减少对话中的回声感。 本发明的回波消除器判断远端输入信号是否是呼叫控制音调信号，如果是这样，则复位自适应滤波器的系数。 另一方面的回波消除器判断远端输入信号是否是预定种类的音调信号，如果结果是肯定的并且回波消除量不大，则停止更新自适应滤波器的系数 超过阈值。 此外，当音调信号结束时，回声消除器根据比较结果来比较音调信号结束之前和之后的回波消除量，重新启动自适应滤波器的系数的更新， 自适应滤波器，或者重新启动自适应滤波器的系数的更新，而不重置自适应滤波器的系数。 此外，可以提供陷波滤波器以消除在自适应滤波器的输入级和用于回波消除的加法器中的音调信号频率分量。
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公开(公告)号：US08077858B2
公开(公告)日：2011-12-13
申请号：US12320975
申请日：2009-02-10
申请人： Masashi Takada
发明人： Masashi Takada
CPC分类号： H04M9/082
摘要： An echo canceler uses an adaptive filter to remove an echo of an incoming far-end signal from an outgoing near-end signal in the presence of ambient noise, updating the filter coefficients while the far-end signal is active and the near-end signal is inactive. The near-end and far-end signals are also sampled to obtain data vectors, which are averaged to generate simulated near-end and far-end signals, from which substitute filter coefficients are calculated and updated while the far-end signal is silent, the substitute filter coefficients being used when the far-end signal becomes active again. The number of data vectors averaged is varied according to the ratio of echo power to ambient near-end noise power, or according to the echo attenuation ratio, thereby speeding up convergence of the filter coefficients. Data sampled while the near-end and far-end signals are both active are excluded from the updating process.
摘要翻译： 回波消除器使用自适应滤波器在存在环境噪声的情况下从输出近端信号中去除进入的远端信号的回波，在远端信号有效时更新滤波器系数，并且近端信号 不活动 近端和远端信号也被采样以获得数据向量，其被平均以产生模拟的近端和远端信号，在远端信号无声时，从其中计算和更新替代滤波器系数， 当远端信号再次变为活动时使用替代滤波器系数。 平均数据矢量的数量根据回波功率与周围近端噪声功率的比例，或根据回波衰减比而变化，从而加速滤波器系数的收敛。 近端和远端信号都处于活动状态时采样的数据从更新过程中排除。
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公开(公告)号：US07805293B2
公开(公告)日：2010-09-28
申请号：US10545670
申请日：2004-02-26
申请人： Masashi Takada , Yoshinari Murakami
发明人： Masashi Takada , Yoshinari Murakami
CPC分类号： G10L21/0364 , G10L19/0204
摘要： A voice band correcting apparatus in which the signal level of limit bands is amplified by a correction filter, the signal level of a correction signal supplied is compared by a level detector to a preset level, and the result of decision is sent as level information to a coefficient controller, where the signal level is adjusted in a controlled manner. The high-quality broadband signal may be obtained on correction without degrading the quality of a communication signal ascribable to excess amplification.
摘要翻译： 一种语音频带校正装置，其中限制频带的信号电平由校正滤波器放大，所提供的校正信号的信号电平被电平检测器比较为预设电平，并且将判定结果作为电平信息发送到 系数控制器，其中以受控的方式调整信号电平。 可以在校正时获得高质量的宽带信号，而不会降低归因于过量放大的通信信号的质量。
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公开(公告)号：US07756505B2
公开(公告)日：2010-07-13
申请号：US11240618
申请日：2005-10-03
IPC分类号： H04B1/28 , H04B1/26 , H04M3/00 , H04M1/00 , G06F7/38 , G06F15/00 , G06F15/76 , G06F9/00 , G06F9/44 , H03K19/173 , H03K19/177 , H01L27/10 , H01L29/76
CPC分类号： H04B1/0003 , H04B1/406
摘要： To realize a software radio processing with a reduced circuit area by hardware and software which can process transmission and reception, or synchronization and demodulation in time division. There are provided a circuit DRC that can dynamically change a configuration with a structure that can change the configuration at a high speed, a general processor, and an interface for connection with an external device such as an AD converter or a DA converter. Software radio is realized by using a software radio chip that conducts plural different processing such as transmission and reception, or synchronization and demodulation in time division. The different processing during the radio signal processing can be conducted in time division. As a result, the software radio can be realized with a circuit of a reduced area in a software radio system that allocates regions of an FPGA to the respective processing.
摘要翻译： 通过可以处理发送和接收的硬件和软件实现具有减少电路面积的软件无线电处理，或者在时间上进行同步和解调。 提供了一种电路DRC，其可以以可以以高速度改变配置的结构动态地改变配置，通用处理器以及用于与诸如AD转换器或DA转换器的外部设备连接的接口。 软件无线电通过使用进行多个不同处理的软件无线电芯片来实现，例如发送和接收，或者时分的同步和解调。 无线电信号处理期间的不同处理可以分时进行。 结果，软件无线电可以通过在分配FPGA的区域到相应处理的软件无线电系统中的减小区域的电路来实现。
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公开(公告)号：US20090304178A1
公开(公告)日：2009-12-10
申请号：US11919333
申请日：2006-04-28
申请人： Masashi Takada
发明人： Masashi Takada
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo canceller, in which an adder adds a pseudo echo generated by an adaptive filter to an echo, so that the echo and the pseudo echo are canceled to each other, includes: a subband filter (8, 14) and a sampling converter (9, 15) for downsampling an audio signal; a selector switch (10, 16) which appropriately switches between a side performing the downsampling and another side performing fullband echo cancellation; and a tap arrangement controller (19) which optimizes a tap arrangement by using coefficients which are updated using a downsampled signal by the adaptive filter (11), the tap arrangement controller outputting the optimized tap arrangement to the adaptive filter (11) at time of the fullband echo cancellation.
摘要翻译： 一种回波消除器，其中加法器将由自适应滤波器产生的伪回声与回波相加，使得回波和伪回波彼此抵消，包括：子带滤波器（8,14）和采样转换器 9，15）用于对音频信号进行下采样; 选择器开关（10,16），其适当地在执行下采样的一侧和执行全频带回波消除的另一侧之间切换; 以及抽头布置控制器（19），其通过使用由自适应滤波器（11）使用下采样信号更新的系数来优化抽头布置，所述抽头布置控制器在所述自适应滤波器（11）的时间将所述优化的抽头布置输出到所述自适应滤波器 全频回波消除。
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公开(公告)号：US20090074177A1
公开(公告)日：2009-03-19
申请号：US12289882
申请日：2008-11-06
申请人： Masashi Takada
发明人： Masashi Takada
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo canceler uses an adaptive filter to remove an echo of an incoming far-end signal from an outgoing near-end signal. Filter coefficients are calculated and updated while the far-end signal is active so as to minimize the residual echo. In addition, the far-end signal and near-end signal are sampled to generate simulated far-end and near-end signals, from which substitute filter coefficients are similarly calculated while the far-end signal is silent. When the far-end signal changes from silent to active, the substitute filter coefficients are swapped in as initial values for the filter coefficients, thereby speeding up subsequent convergence of the filter coefficients without significant added computational cost.
摘要翻译： 回波消除器使用自适应滤波器从输出的近端信号中去除进入的远端信号的回波。 在远端信号有效时计算和更新滤波器系数，以便使残差回波最小化。 此外，对远端信号和近端信号进行采样以产生模拟的远端和近端信号，在远端信号为静音的情况下，类似地计算替代滤波器系数。 当远端信号从静音变为有效时，替代滤波器系数作为滤波器系数的初始值进行交换，从而加快滤波器系数的后续收敛，而没有显着增加的计算成本。
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公开(公告)号：US20070168185A1
公开(公告)日：2007-07-19
申请号：US10545435
申请日：2004-02-10
申请人： Masashi Takada
发明人： Masashi Takada
IPC分类号： G10L19/02
CPC分类号： G10L21/038
摘要： A band recovering device recovers frequency components lying in a frequency band lost due to band-limitation of a sound signal. The device includes a peak-limiting amplifier for amplifying an input narrow-band signal while preventing the resulting amplified signal from exceeding a maximum amplitude. A peak-limitation detector detects the level of the amplified signal output. An amplification controller increases the amplification factor and/or the amount of amplification of the peak-limiting amplifier in accordance with the level of the amplified signal. A band recovering circuit generates, based on the amplified signal output from the peak-limiting amplifier and input narrow-band signal, a band-recovered signal including the frequency components lying in the missing band.
摘要翻译： 频带恢复装置恢复由于声音信号的频带限制而丢失的频带中的频率分量。 该装置包括用于放大输入窄带信号同时防止所得到的放大信号超过最大幅度的峰值限制放大器。 峰值限制检测器检测放大信号输出的电平。 放大控制器根据放大信号的电平增加限幅放大器的放大系数和/或放大量。 频带恢复电路基于从峰值限幅放大器和输入窄带信号输出的放大信号产生包括位于丢失频带中的频率分量的带恢复信号。
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公开(公告)号：US20060073804A1
公开(公告)日：2006-04-06
申请号：US11240618
申请日：2005-10-03
IPC分类号： H04B1/28
CPC分类号： H04B1/0003 , H04B1/406
摘要： To realize a software radio processing with a reduced circuit area by hardware and software which can process transmission and reception, or synchronization and demodulation in time division. There are provided a circuit DRC that can dynamically change a configuration with a structure that can change the configuration at a high speed, a general processor, and an interface for connection with an external device such as an AD converter or a DA converter. Software radio is realized by using a software radio chip that conducts plural different processing such as transmission and reception, or synchronization and demodulation in time division. The different processing during the radio signal processing can be conducted in time division. As a result, the software radio can be realized with a circuit of a reduced area in a software radio system that allocates regions of an FPGA to the respective processing.
摘要翻译： 通过可以处理发送和接收的硬件和软件实现具有减少电路面积的软件无线电处理，或者在时间上进行同步和解调。 提供了一种电路DRC，其可以以可以以高速度改变配置的结构动态地改变配置，通用处理器和用于与诸如AD转换器或DA转换器的外部设备连接的接口。 软件无线电通过使用进行多个不同处理的软件无线电芯片来实现，例如发送和接收，或者时分的同步和解调。 无线电信号处理期间的不同处理可以分时进行。 结果，软件无线电可以通过在分配FPGA的区域到相应处理的软件无线电系统中的减小区域的电路来实现。
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