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公开(公告)号：US20190158107A1
公开(公告)日：2019-05-23
申请号：US16259165
申请日：2019-01-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang
Abstract: A system includes an analog-to-digital converter receiving input signals. One particular input signal has a particular analog value, and the analog-to-digital converter uses a fixed reference to convert the particular analog value to a particular digital value. The analog-to-digital converter uses the particular analog value as a reference for converting the analog values of the remaining input signals.
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公开(公告)号：US20160212527A1
公开(公告)日：2016-07-21
申请号：US14828977
申请日：2015-08-18
Applicant: Texas Instruments Incorporated
Inventor： Zhenyong Zhang , Wei Ma , Mikko Topi Loikkanen , Mark Kuhns
CPC classification number: H04R3/00 , H04R2410/00
Abstract: A duty-cycled acoustic sensor saves power, for example, by operating for relatively short periods of time in a repetitive manner. A sensor bias current provides operating power to the sensor. An output analog signal from the sensor carries the information induced by the sensor upon the bias signal. Capacitive coupling is employed to remove direct DC voltage from the output analog signal to generate an analog input signal for acoustic analysis. A capacitor for capacitive coupling is pre-charged to reduce the charging time of the capacitor as the sensor is being powered up. After the capacitor is sufficiently precharged, acoustic analysis is performed on the analog input signal. The sensor is powered down by substantially blocking current flow through the sensor, which saves power. Results of the acoustic analysis can be used, for example, to control parameters of the duty-cycling of the acoustic sensor.
Abstract translation: 占空比的声学传感器例如通过以重复的方式操作相对短的时间段来节省功率。 传感器偏置电流为传感器提供工作电源。 来自传感器的输出模拟信号承载由偏置信号传感器感应的信息。 电容耦合用于从输出模拟信号中去除直接的直流电压，以产生用于声学分析的模拟输入信号。 用于电容耦合的电容器被预充电，以在传感器上电时减小电容器的充电时间。 在电容充分预充电之后，对模拟输入信号执行声学分析。 传感器通过基本上阻挡通过传感器的电流来断电，从而节省电力。 声学分析的结果可以用于例如控制声学传感器的占空比的参数。
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公开(公告)号：US11302306B2
公开(公告)日：2022-04-12
申请号：US16452760
申请日：2019-06-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang , Wei Ma
IPC: G10L15/02 , G10L21/0264 , G10L21/0224 , G10L15/32 , G10L15/22 , G10L25/21 , G10L25/09 , G10L15/30
Abstract: A sound recognition system including time-dependent analog filtered feature extraction and sequencing. An analog front end (AFE) in the system receives input analog signals, such as signals representing an audio input to a microphone. Features in the input signal are extracted, by measuring such attributes as zero crossing events and total energy in filtered versions of the signal with different frequency characteristics at different times during the audio event. In one embodiment, a tunable analog filter is controlled to change its frequency characteristics at different times during the event. In another embodiment, multiple analog filters with different filter characteristics filter the input signal in parallel, and signal features are extracted from each filtered signal; a multiplexer selects the desired features at different times during the event.
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公开(公告)号：US20150066495A1
公开(公告)日：2015-03-05
申请号：US14013014
申请日：2013-08-28
Applicant: Texas Instruments Incorporated
Inventor： Zhenyong Zhang , Wei Ma
IPC: G10L15/28
Abstract: A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sparse sound parameter information is extracted from the analog signal and compared to a sound parameter reference stored locally with the sound recognition sensor to detect when the signature sound is received in the analog signal. A portion of the sparse sound parameter information is differential zero crossing (ZC) counts. Differential ZC rate may be determined by measuring a number of times the analog signal crosses a threshold value during each of a sequence of time frames to form a sequence of ZC counts and taking a difference between selected pairs of ZC counts to form a sequence of differential ZC counts.
Abstract translation: 低功率声音识别传感器被配置为接收可能包含签名声音的模拟信号。 从模拟信号中提取稀疏声音参数信息，并将其与用声音识别传感器本地存储的声音参数参考值进行比较，以检测在模拟信号中何时接收到签名声音。 稀疏声音参数信息的一部分是差分零交叉（ZC）计数。 差分ZC速率可以通过测量模拟信号在时间序列序列中的每一个中跨越阈值的次数来确定，以形成ZC计数序列，并获取所选择的ZC计数对之间的差异以形成差分序列 ZC计数。
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公开(公告)号：US10833695B2
公开(公告)日：2020-11-10
申请号：US16259165
申请日：2019-01-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang
Abstract: A system includes an analog-to-digital converter receiving input signals. One particular input signal has a particular analog value, and the analog-to-digital converter uses a fixed reference to convert the particular analog value to a particular digital value. The analog-to-digital converter uses the particular analog value as a reference for converting the analog values of the remaining input signals.
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Patent Agency Ranking
公开(公告)号：US20190318720A1
公开(公告)日：2019-10-17
申请号：US16452760
申请日：2019-06-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang , Wei Ma
IPC: G10L15/02 , G10L25/09 , G10L25/21 , G10L15/30 , G10L21/0264 , G10L15/32 , G10L21/0224 , G10L15/22
Abstract: A sound recognition system including time-dependent analog filtered feature extraction and sequencing. An analog front end (AFE) in the system receives input analog signals, such as signals representing an audio input to a microphone. Features in the input signal are extracted, by measuring such attributes as zero crossing events and total energy in filtered versions of the signal with different frequency characteristics at different times during the audio event. In one embodiment, a tunable analog filter is controlled to change its frequency characteristics at different times during the event. In another embodiment, multiple analog filters with different filter characteristics filter the input signal in parallel, and signal features are extracted from each filtered signal; a multiplexer selects the desired features at different times during the event.
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公开(公告)号：US10381021B2
公开(公告)日：2019-08-13
申请号：US15260471
申请日：2016-09-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang , Wei Ma
Abstract: A low power sound recognition sensor is configured to receive an analog signal that may contain a signature sound. Sparse sound parameter information is extracted from the analog signal and compared to a sound parameter reference stored locally with the sound recognition sensor to detect when the signature sound is received in the analog signal. A portion of the sparse sound parameter information is differential zero crossing (ZC) counts. Differential ZC rate may be determined by measuring a number of times the analog signal crosses a threshold value during each of a sequence of time frames to form a sequence of ZC counts and taking a difference between selected pairs of ZC counts to form a sequence of differential ZC counts.
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公开(公告)号：US10193564B2
公开(公告)日：2019-01-29
申请号：US15339971
申请日：2016-11-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang
Abstract: A system includes an analog-to-digital converter receiving a plurality of input signals. One particular input signal has a particular analog value and the analog-to-digital converter uses a fixed reference to convert the particular analog value to a particular digital value. The analog-to-digital converter uses the particular analog value as a reference for converting the analog values of the remaining input signals.
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公开(公告)号：US20150120026A1
公开(公告)日：2015-04-30
申请号：US14065129
申请日：2013-10-28
Applicant: Texas Instruments Incorporated
Inventor： Zhenyong Zhang
Abstract: A system includes an analog-to-digital converter receiving a plurality of input signals. One particular input signal has a particular analog value and the analog-to-digital converter uses a fixed reference to convert the particular analog value to a particular digital value. The analog-to-digital converter uses the particular analog value as a reference for converting the analog values of the remaining input signals.
Abstract translation: 系统包括接收多个输入信号的模拟 - 数字转换器。 一个特定的输入信号具有特定的模拟值，并且模数转换器使用固定参考以将特定的模拟值转换成特定的数字值。 模数转换器使用特定的模拟值作为转换剩余输入信号的模拟值的参考。
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公开(公告)号：US20220215829A1
公开(公告)日：2022-07-07
申请号：US17702253
申请日：2022-03-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Zhenyong Zhang , Wei Ma
IPC: G10L15/02 , G10L21/0264 , G10L21/0224 , G10L15/32 , G10L15/22 , G10L25/21 , G10L25/09 , G10L15/30
Abstract: A sound recognition system including time-dependent analog filtered feature extraction and sequencing. An analog front end (AFE) in the system receives input analog signals, such as signals representing an audio input to a microphone. Features in the input signal are extracted, by measuring such attributes as zero crossing events and total energy in filtered versions of the signal with different frequency characteristics at different times during the audio event. In one embodiment, a tunable analog filter is controlled to change its frequency characteristics at different times during the event. In another embodiment, multiple analog filters with different filter characteristics filter the input signal in parallel, and signal features are extracted from each filtered signal; a multiplexer selects the desired features at different times during the event.
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