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公开(公告)号：US20240290348A1
公开(公告)日：2024-08-29
申请号：US18232031
申请日：2023-08-09
发明人： Xianghui Xiao , Noureddine Kermiche
CPC分类号： G11B5/5586 , G11B20/24
摘要： Various aspects are directed to a data storage device comprising one or more disks, an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface among the one or more disks, and one or more processing devices. The one or more processing devices are configured to detect repeatable runout (RRO) noise components from a measurement of fly height of the selected head above one or more sectors of a fly height measurement track, and remove the detected RRO noise components from one or more per-sector readback signal measurements.
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公开(公告)号：US20240194223A1
公开(公告)日：2024-06-13
申请号：US18358850
申请日：2023-07-25
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/24
摘要： According to one embodiment, a magnetic recording device includes a magnetic head and a controller. The magnetic head includes first and second magnetic poles, a magnetic element provided between the first and second magnetic poles, and first and second terminals. The controller is configured to perform a recording operation. In the recording operation, the controller is configured to supply a recording current to the coil while applying an element voltage not less than a first voltage and not more than a second voltage between the first terminal and the second terminal. A differential resistance of the magnetic element when a positive applied voltage applied between the first terminal and the second terminal is changed while the recording current is supplied to the coil becomes a first peak when the applied voltage is the first voltage.
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公开(公告)号：US11322127B2
公开(公告)日：2022-05-03
申请号：US16929504
申请日：2020-07-15
IPC分类号： G10K11/178 , G10L21/0208 , G11B20/24
摘要： A noise cancellation technique is presented with improved frequency resolution. The method includes: acquiring a digitized noise signal from an environment in which the audio signal stream is present; receiving a data sample from the digitized noise signal; appending one or more additional samples to the data sample to form a series of samples, where magnitude for each of the one or more additional samples is substantially zero; computing a frequency domain representation of the series of samples in the frequency domain; shifting the frequency domain representation of the series of samples in time using the digital processor circuit, thereby producing a shifted frequency domain representation of the series of samples; converting the shifted frequency domain representation of the series of samples to time domain to form a portion of an anti-noise signal; and outputting the anti-noise signal into the audio signal stream to abate the noise through destructive interference.
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公开(公告)号：US20180288542A1
公开(公告)日：2018-10-04
申请号：US15955037
申请日：2018-04-17
发明人： Joseph J. LACIRIGNOLA , Trina Rae VIAN , David F. AUBIN, JR. , Thomas F. QUATIERI , Kate D. FISCHL , Paula P. COLLINS , Christopher J. SMALT , Paul D. GATEWOOD , Nicolas MALYSKA , David C. MAURER
CPC分类号： H04R25/75 , G06F3/165 , G10L21/0208 , G11B20/10 , G11B20/24 , H04R3/005 , H04R2430/01 , H04R2460/07
摘要： Loud sounds with fast rise times, like gunfire and explosions, can cause noise-induced hearing loss (NIHL). Unfortunately, current models do not adequately explain how impulsive sounds cause NIHL, which makes it difficult to predict and prevent NIHL on battlefields and other hostile or rugged environments. Fortunately, the impulsive sounds experienced by soldiers and others working in rugged environments can be recorded using a compact, portable system that acquires, digitizes, and stores high-bandwidth audio data. An example of this system can be mounted on a helmet or other article and used to record hours of audio data at a bandwidth of 20 kHz or higher, which is broad enough to capture sounds with rise times less than 50 ms. An analog-to-digital converter (ADC) digitizes these broadband audio signals at rate of 40 kHz or higher to preserve the impulse information. A processor transfers the digitized samples from a buffer to a memory card for later retrieval using an interrupt-driven processing technique.
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公开(公告)号：US09837115B1
公开(公告)日：2017-12-05
申请号：US15339189
申请日：2016-10-31
发明人： Deepak Sridhara , William M Radich
CPC分类号： G11B5/09 , G11B5/012 , G11B20/1833 , G11B2020/1222
摘要： Systems and methods are disclosed for implementing unequal error correction code (ECC) in multi-track recording. A device may comprise a circuit configured to implement an error correction coding scheme applying different code rate error correction codes on adjacent tracks within a same recording zone. The circuit may perform a read operation, including simultaneously detecting bits from a first track and a second track of the adjacent tracks, iteratively applying detected bits from the first track to perform adjacent track interference cancellation (ATIC) to decode bits from the second track, and iteratively applying detected bits from the second track to perform ATIC to decode bits from the first track.
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6.发明授权Decision directed and non-decision directed low frequency noise cancelation in turbo detection 有权涡轮检测中的决策指导和非决策指导的低频噪声消除公开(公告)号：US08902530B1
公开(公告)日：2014-12-02
申请号：US13826028
申请日：2013-03-14
发明人： Zheng Wu , Jason Bellorado , Naveen Kumar , Marcus Marrow
CPC分类号： G11B20/10009
摘要： A set of decisions is determined based at last in part on a set of samples. For a given sample in the set of samples, a low frequency noise estimate is estimated based at least in part on (1) at least some samples from the set of samples and (2) at least some decisions from the set of decisions. A reduced noise sample is generated by removing the low frequency noise estimate from the given sample.
摘要翻译： 最后一部分基于一组样本确定一组决策。 对于该组样本中的给定样本，至少部分地基于（1）来自该组样本的至少一些样本和（2）来自该组决策的至少一些决定来估计低频噪声估计。 通过从给定的样本中去除低频噪声估计值来产生降噪噪声样本。
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公开(公告)号：US08693297B2
公开(公告)日：2014-04-08
申请号：US13534670
申请日：2012-06-27
申请人： Atsushi Higashide
发明人： Atsushi Higashide
IPC分类号： G11B20/24
CPC分类号： G11B19/12 , G06F3/0607 , G06F3/0659 , G06F3/0685 , G11B20/10527 , G11B20/22 , G11B20/24 , G11B2020/10685 , G11B2020/10694 , G11B2220/17 , G11B2220/2541 , G11B2220/2545 , G11B2220/2562 , G11B2220/61
摘要： Noise generation in transferring data is suppressed or prevented by transferring data at a data transfer rate according to the amount of data to be transferred to a memory. In a reproducing apparatus, when a read unit or both reads data from a storage medium or both, a determination unit determines the type of the storage medium from which the data is read, then, according to the determined type of the storage medium, a transfer rate change unit orders a data transfer unit to use a preset transfer rate corresponding to the type of the storage medium. The data transfer unit transfers the read data to the temporary storage unit at the ordered transfer rate. This allows data to be transferred without a significant change in the amount of data transfer, which suppresses or prevents noise.
摘要翻译： 通过根据要传送到存储器的数据量以数据传送速率传送数据来抑制或防止传送数据中的噪声产生。 在再现装置中，当读取单元或两者从存储介质或两者读取数据时，确定单元确定从其读取数据的存储介质的类型，然后根据所确定的存储介质的类型， 传输速率改变单元命令数据传送单元使用与存储介质的类型对应的预设传送速率。 数据传送单元按照有序传送速率将读取的数据传送到临时存储单元。 这允许数据传输而不会显着改变数据传输量，从而抑制或防止噪声。
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公开(公告)号：US20130335845A1
公开(公告)日：2013-12-19
申请号：US13527501
申请日：2012-06-19
CPC分类号： G11B20/10046 , G11B5/008 , G11B20/10074 , G11B20/10287 , G11B2020/185 , G11B2020/1853 , G11B2220/956
摘要： In one embodiment, a data storage system includes a tape channel for reading data from a tape to produce a signal, an adaptive noise whitening filter adapted for receiving the signal, the noise whitening filter being adapted for minimizing variance of noise affecting the signal output from the noise whitening filter, a soft DMAX detector adapted for receiving the signal from the noise whitening filter, the soft detector adapted for calculating first soft information about each bit of the signal and sending the first soft information to a soft decoder, and the soft decoder positioned subsequent to the soft detector, the soft decoder being adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft DMAX detector, wherein one or more noise whitening coefficients used in the noise whitening filter are updated using a noise whitening filter coefficient updater.
摘要翻译： 在一个实施例中，数据存储系统包括用于从磁带读取数据以产生信号的磁带通道，适于接收该信号的自适应噪声白化滤波器，所述噪声白化滤波器适于最小化影响从 噪声白化滤波器，适于接收来自噪声白化滤波器的信号的软DMAX检测器，软检测器适于计算关于信号的每个位的第一软信息并将第一软信息发送到软解码器，以及软解码器 定位在软检测器之后，软解码器适于计算关于信号的每个位的第二软信息，并将第二软信息发送到软DMAX检测器，其中在噪声白化滤波器中使用的一个或多个噪声白化系数被更新 使用噪声美白滤波系数更新器。
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公开(公告)号：US20050276193A1
公开(公告)日：2005-12-15
申请号：US11148196
申请日：2005-06-09
申请人： Yutaka Kamimori
发明人： Yutaka Kamimori
CPC分类号： G11B20/10481 , G11B20/10009 , G11B20/10046 , G11B20/24
摘要： An optical disc reproducing apparatus has a function of setting a cutoff frequency and a boost amount of a read out signal from an optical disc and performing equalizer adjustment, and includes a system controller for searching for an optimal jitter value by simultaneously changing a cutoff frequency and a boost amount to thereby set positions of jitter measuring points determined on a coordinate plane whose abscissas represent cutoff frequencies and whose ordinates represent boost amounts, and by moving the measuring points.
摘要翻译： 光盘重放装置具有从光盘设定截止频率和读出信号的升压量并执行均衡器调整的功能，并且包括用于通过同时改变截止频率来搜索最佳抖动值的系统控制器， 从而设定在横坐标表示截止频率并且其纵坐标表示增强量的坐标平面上确定的抖动测量点的位置，以及移动测量点。
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公开(公告)号：US06958941B2
公开(公告)日：2005-10-25
申请号：US10460293
申请日：2003-06-11
申请人： Takayuki Honda
发明人： Takayuki Honda
CPC分类号： H05K1/0216 , G11B20/24 , H05K2201/09236 , H05K2201/09245 , H05K2201/10053 , H05K2201/10159 , H05K2201/10689 , H05K2203/1572
摘要： In a circuit board including an analog circuit and a digital circuit, the S/N ratio reduction resulting from the interference of digital signals with analog signals is suppressed. The circuit board includes a digital signal processing section forming part of the digital circuit, digital signal external conductors connected to the digital signal processing section, and digital signal output control means for interrupting the transmission of the digital signals from the digital signal processing section to the digital signal external conductors. A decrease in the limitation for the wiring pattern and the device arrangement provides an increase in the degree of freedom for designing, thereby making it possible to miniaturize the circuit board and to reduce the manufacturing cost thereof.
摘要翻译： 在包括模拟电路和数字电路的电路板中，由数字信号与模拟信号的干扰产生的S / N比减小被抑制。 电路板包括形成数字电路的一部分的数字信号处理部分，连接到数字信号处理部分的数字信号外部导体和用于中断数字信号从数字信号处理部分传输到数字信号处理部分的数字信号输出控制装置 数字信号外部导线。 布线图案和装置布置的限制的减少提高了设计的自由度，从而使得可以使电路板小型化并降低其制造成本。
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