专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明授权

US4504870A Automatic level adjustment with means for minimizing drop-out effects 失效
标题翻译：自动电平调节，具有最大限度地减少掉落效应的手段
公开(公告)号：US4504870A
公开(公告)日：1985-03-12
申请号：US399571
申请日：1982-07-19
申请人： Masatsugu Kitamura , Mamoru Inami , Yoshiaki Tanaka , Zenju Otsuki
发明人： Masatsugu Kitamura , Mamoru Inami , Yoshiaki Tanaka , Zenju Otsuki
IPC分类号： G11B5/027 , G11B20/02 , G11B20/04 , G11B20/18 , G11B15/02 , G11B27/36
CPC分类号： G11B20/182 , G11B20/025 , G11B20/04
摘要： A test signal is recorded on a magnetic tape prior to the recording of audio signals and reproduced to allow detection of an average value of the magnitude of the reproduced test signal. A drop-out in the reproduced signal is detected if it occurs during the process of deriving the average value. If the drop-out is not detected, a difference between the average value and a reference value is detected to adjust the signal level of the recorded test signal so that the difference reduces substantially to zero. If a drop-out is detected the average value is renewed by repeating the process of recording and reproducing the test signal.
摘要翻译：在记录音频信号之前将测试信号记录在磁带上，并被再现以允许检测再现的测试信号的幅度的平均值。如果在导出平均值的过程中发生了再现信号的丢失。如果没有检测到丢失，则检测平均值和参考值之间的差异，以调整所记录的测试信号的信号电平，使得该差大大减小到零。如果检测到辍学，则通过重复记录和再现测试信号的处理来更新平均值。

12. 发明授权

US4455634A Audio/video quality monitoring system 失效
标题翻译：音视频质量监控系统
公开(公告)号：US4455634A
公开(公告)日：1984-06-19
申请号：US429347
申请日：1982-09-30
申请人： Edward Efron , James O. McPherson , Young B. Kim
发明人： Edward Efron , James O. McPherson , Young B. Kim
IPC分类号： G06F11/277 , G11B5/86 , G11B20/02 , G11B20/18 , G11B27/024 , G11B27/028 , G11B27/36 , H04N17/06 , G11B23/18
CPC分类号： G11B5/86 , G06F11/277 , G11B20/025 , G11B20/1816 , G11B27/024 , G11B27/028 , G11B27/36 , H04N17/06 , G11B2220/20 , G11B2220/90
摘要： Method and means for evaluating the quality of audio and/or video transfer characteristics of a device upon which, or through which, audio and/or video information is contained, or passes, respectively. Both method and apparatus concern the evaluation of the quality of information transfer in the recording and playing back of a recording medium or in the transferring of audio and/or video information through an information handling device referred to as a throughput device. Unit evaluation is accomplished by establishing an input signal of known content, measuring selected parameters of selected parts of the input signal, feeding the input signal to the unit under test, measuring the parameters of parts of the output signal from the unit under test corresponding to the same selected parts of the input signal, and comparing the selected parameters of the input signal with the corresponding parameters of the output signal. Whether monitoring the quality of the signal transfer characteristics of a throughput device, a magnetic tape containing program material, or a video disc, master disc or replica, a "signature" is created for the unit under test, and subsequent analysis of the unit as it progresses along a production line or of a copy made on the same or alternate recording medium results in a second "signature" which is compared against the first signature to make a determination as to the quality of the signal handling or transfer characteristics of the unit. In this manner, out-of-tolerance conditions can be automatically detected, thereby eliminating subjectivity and providing consistency in the quality level of device testing.
摘要翻译：分别在其上包含音频和/或视频信息或通过其的装置的音频和/或视频传送特性的质量评估或通过的方法和装置。方法和装置都涉及记录介质的记录和回放中的信息传送质量的评估，或者通过称为吞吐量装置的信息处理装置传送音频和/或视频信息。单元评估是通过建立已知内容的输入信号，测量输入信号的选定部分的选定参数，将输入信号馈送到被测单元，测量来自被测单元的输出信号的部分参数，输入信号的相同的选定部分，并将输入信号的选定参数与输出信号的对应参数进行比较。无论是监测吞吐量装置的信号传输特性的质量，包含节目素材的磁带，视频盘，母盘或副本，都会为被测单元创建“签名”，随后将该单元分析为沿着生产线或在相同或替代的记录介质上制作的副本的进展导致与第一签名进行比较的第二“签名”，以确定关于单元的信号处理或传送特性的质量。以这种方式，可以自动检测超出公差的条件，从而消除主观性并提供设备测试质量水平的一致性。

13. 发明授权

US4119812A Signal defect detection and compensation with signal de-emphasis 失效
标题翻译：信号去加重信号缺陷检测和补偿
公开(公告)号：US4119812A
公开(公告)日：1978-10-10
申请号：US789294
申请日：1977-04-20
申请人： Edward Coley Fox
发明人： Edward Coley Fox
IPC分类号： G11B9/06 , G11B20/02 , G11B20/06 , G11B20/22 , G11B20/24 , H03G3/34 , H04R3/00 , H04B15/00
CPC分类号： G11B20/22 , G11B20/025 , G11B20/06 , G11B20/24 , H03G3/345
摘要： Information processing system, for use with a source of carrier waves modulated with audio information, includes in respective audio channels a demodulator and for recovery of the audio information and track-and-hold amplifiers. Separate circuits are provided for detecting carrier drop-outs and impulse noise occurrences. The output of the detecting circuits is utilized to control the operation of the track-and-hold amplifiers to effect a masking of these occurrences. Signal de-emphasis is accomplished in each channel by means of two separate filters respectively arranged to operate on the input and output signal of the track-and-hold amplifier to minimize noise input to the track-and-hold amplifier.
摘要翻译：用于与音频信息调制的载波源一起使用的信息处理系统在各自的音频通道中包括解调器并用于恢复音频信息和跟踪和保持放大器。提供单独的电路用于检测载波丢失和脉冲噪声发生。检测电路的输出用于控制跟踪和保持放大器的操作以对这些事件进行掩蔽。信号去加重通过两个独立的滤波器在每个通道中完成，分别布置成对轨道 - 保持放大器的输入和输出信号进行操作，以最小化输入到跟踪和保持放大器的噪声。

14. 发明申请

WO1993005507A1 RECOVERING AUDIO SIGNALS FROM A VARIABLE-AREA OPTICAL RECORD 审中-公开
标题翻译：从可变区域光学记录恢复音频信号
公开(公告)号：WO1993005507A1
公开(公告)日：1993-03-18
申请号：PCT/US1992007563
申请日：1992-09-04
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： DOLBY LABORATORIES LICENSING CORPORATION , MURPHY, James, Brokaw , RICHARDS, Martin, John
IPC分类号： G11B07/00
CPC分类号： G11B20/025 , G11B7/0032 , G11B20/00992 , G11B20/24
摘要： The invention relates generally to the recovery of an audio information signal from a variable-area optical record and more particularly to the recovery of such a signal from motion picture film variable-area optical soundtracks. The invention, in its various aspects, operates in an environment in which a scan signal is obtained by repetitively scanning the optical record substantially transverse to the bias line. The invention enhances the noise reduction effect obtainable using a threshold detector by providing the threshold detector with a transversely varying threshold level that varies according to the position of the scan across the width of the soundtrack. According to the invention, a threshold is provided for a bilateral soundtrack that has a minimum level at the bias line of the soundtrack and that increases progressively with distance from the bias line. Thus, on each scan, the threshold level is high when the scan is at the edge of each sound-track , falls progressively to a minimum when the scan reaches the bias line, and then increases progressively back to its original high level when the scan is at the other edge of the sound-track.
摘要翻译：本发明一般涉及从可变区光学记录中恢复音频信息信号，更具体地，涉及从电影胶片可变区光学音轨恢复这种信号。本发明在其各个方面都在通过重复扫描基本上横向于偏压线的光学记录而获得扫描信号的环境中工作。本发明通过向阈值检测器提供横向变化的阈值水平来增强根据跨越音轨宽度的扫描位置而变化的使用阈值检测器可获得的噪声降低效果。根据本发明，为在音带的偏置线处具有最小电平并且随着距偏置线的距离而逐渐增加的双边音轨提供阈值。因此，在每次扫描时，当扫描位于每个声轨的边缘时，阈值电平较高，当扫描到达偏置线时逐渐降低至最小值，然后在扫描时逐渐升高至其原始高电平在声轨的另一边。

15. 发明申请

WO1985005210A1 PROCESS AND CIRCUIT FOR STORING FREQUENCY-MODULATED SIGNALS 审中-公开
标题翻译：存储频率调制信号的过程和电路
公开(公告)号：WO1985005210A1
公开(公告)日：1985-11-21
申请号：PCT/DE1985000111
申请日：1985-04-10
申请人： ROBERT BOSCH GMBH , SOCHOR, Josef
发明人： ROBERT BOSCH GMBH
IPC分类号： G11B20/02
CPC分类号： G11B27/024 , G11B20/025 , G11B20/06 , G11B2220/90 , H04N5/94
摘要： In the process for storing a frequency-modulated signal, a signal taken from a dynamic memory is re-recorded after amplification, filtering and amplitude limitation. When there is loss of information with discontinuity in the envelope at this point, an information loss identification signal is used, by which the loss of information can be compensated.
摘要翻译：在存储调频信号的过程中，从放大，滤波和幅度限制之后重新记录从动态存储器获取的信号。当在这一点的信封中存在不连续的信息丢失时，使用信息丢失识别信号，由此可以补偿信息丢失。

16. 发明授权

US11915731B1 Data storage device with notch filter calibration based on multi-rate excitation and error rejection 有权
公开(公告)号：US11915731B1
公开(公告)日：2024-02-27
申请号：US17895541
申请日：2022-08-25
申请人： WESTERN DIGITAL TECHNOLOGIES, INC.
发明人： Shinsuke Nakagawa , Zaifeng Chen , Hidehiko Numasato
IPC分类号： G11B5/48 , G11B20/02 , G11B5/596
CPC分类号： G11B5/4813 , G11B5/59622 , G11B20/025
摘要： Various illustrative aspects are directed to a data storage device, comprising one or more disks; an actuator mechanism configured to position one or more heads proximate to one or more disk surfaces of the one or more disks; and one or more processing devices, comprising an actuator mechanism control system configured for controlling the actuator mechanism. The one or more processing devices are configured to: output a multi-rate excitation to at least one multi-rate notch filter of the actuator mechanism control system; detect a frequency response of the actuator mechanism in response to the multi-rate excitation; and calibrate the at least one multi-rate notch filter of the actuator mechanism control system, based at least in part on the detected frequency response of the actuator mechanism.

17. 发明授权

US09305591B2 Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices 有权
标题翻译：磁记录装置中对称和不对称饱和度的自适应校正
公开(公告)号：US09305591B2
公开(公告)日：2016-04-05
申请号：US14310831
申请日：2014-06-20
申请人： Quantum Corporation
发明人： Marc Feller , Jaewook Lee , Umang Mehta
IPC分类号： G11B5/035 , G11B20/02 , G11B5/09 , G11B20/10 , G11B20/14
CPC分类号： G11B20/025 , G11B5/09 , G11B20/10046 , G11B20/10203 , G11B20/10231 , G11B20/10314 , G11B20/10324 , G11B20/1492 , G11B2220/2508
摘要： A magnetic recording device includes a preprocessor, an interpolator and a slicer. The preprocessor receives at least n saturated input signals including an nth saturated input signal The preprocessor is configured to process each of the n saturated input signals to produce a corresponding nth output signal. The n output signals include an nm output signal from the nth saturated input signal. The interpolator processes the nth output signal to determine an nth interpolator output. The slicer determines an nth slicer output for the nh output signal. The nth slicer output is at one of three different levels. The preprocessor can receive and process an n +1th saturated input signal to produce an n +1th output signal that is based on a difference between the nth interpolator output and the level of the nth slicer output.
摘要翻译：磁记录装置包括预处理器，内插器和限幅器。预处理器至少接收包括第n饱和输入信号的n个饱和输入信号。预处理器被配置为处理n个饱和输入信号中的每一个以产生相应的第n个输出信号。 n个输出信号包括来自第n饱和输入信号的nm输出信号。内插器处理第n个输出信号以确定第n个内插器输出。限幅器确定nh输出信号的第n个限幅器输出。第n个切片器输出是三个不同的级别之一。预处理器可以接收并处理第n + 1个饱和输入信号，以产生基于第n个内插器输出与第n个切片器输出的电平之差的第n + 1个输出信号。

18. 发明授权

US08804257B2 Variable stopwrite threshold using kurtosis 有权
标题翻译：使用峰度的可变阻止写入阈值
公开(公告)号：US08804257B2
公开(公告)日：2014-08-12
申请号：US14068304
申请日：2013-10-31
申请人： International Business Machines Corporation
发明人： Randy C. Inch , Kevin B. Judd
IPC分类号： G11B27/36 , G11B21/02
CPC分类号： G11B20/025 , G11B5/00826 , G11B5/09 , G11B5/584 , G11B20/10388 , G11B20/10472 , G11B2220/90
摘要： A method according to one embodiment includes measuring a current position error signal; calculating a standard deviation or a variance using the current position error signal sample; calculating a kurtosis value, using the current position error signal sample or derivative thereof; adjusting a threshold value using the kurtosis value; comparing the standard deviation or variance to the threshold value; enabling writing when the standard deviation or variance does not exceed the threshold value.
摘要翻译：根据一个实施例的方法包括测量当前位置误差信号; 使用当前位置误差信号样本计算标准偏差或方差; 使用当前位置误差信号样本或其导数计算峰度值; 使用峰度值调整阈值; 将标准偏差或方差与阈值进行比较; 当标准偏差或方差不超过阈值时，使能写入。

19. 发明授权

US08760789B2 Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices 有权
标题翻译：磁记录装置中对称和不对称饱和度的自适应校正
公开(公告)号：US08760789B2
公开(公告)日：2014-06-24
申请号：US13240745
申请日：2011-09-22
申请人： Marc Feller , Jaewook Lee , Umang Mehta
发明人： Marc Feller , Jaewook Lee , Umang Mehta
IPC分类号： G11B5/035
CPC分类号： G11B20/025 , G11B5/09 , G11B20/10046 , G11B20/10203 , G11B20/10231 , G11B20/10314 , G11B20/10324 , G11B20/1492 , G11B2220/2508
摘要： In one embodiment, a read channel comprises: a preprocessor for receiving a first signal and producing a second signal from the first signal using current values of a positive coefficient, a zero coefficient, and a negative coefficient; an interpolator for producing a third signal based on the second signal; and a slicer for producing a fourth signal from the third signal by estimating a level for the third signal. The fourth signal is at one of three levels consisting of a positive level, a zero level, and a negative level. For every n first signals received by the preprocessor, the current value of one of the positive coefficient, the zero coefficient, and the negative coefficient is adjusted depending on which of the three levels the fourth signal is at.
摘要翻译：在一个实施例中，读通道包括：预处理器，用于接收第一信号，并使用正系数，零系数和负系数的当前值从第一信号产生第二信号; 用于基于所述第二信号产生第三信号的内插器; 以及切片器，用于通过估计第三信号的电平来从第三信号产生第四信号。第四信号是由正电平，零电平和负电平组成的三个电平之一。对于由预处理器接收的每n个第一信号，根据第四信号所处的三个电平中的哪一个来调整正系数，零系数和负系数之一的当前值。

20. 发明授权

US07292522B2 Optical disc with wobbled tracks and apparatus using this optical disc 失效
标题翻译：具有摆动轨道的光盘和使用该光盘的装置
公开(公告)号：US07292522B2
公开(公告)日：2007-11-06
申请号：US10762001
申请日：2004-01-22
申请人： Yuji Nagai , Chosaku Noda , Akihito Ogawa , Kazuto Kuroda
发明人： Yuji Nagai , Chosaku Noda , Akihito Ogawa , Kazuto Kuroda
IPC分类号： G11B7/24 , G11B5/09
CPC分类号： G11B27/24 , G11B7/0053 , G11B7/24082 , G11B20/025 , G11B20/1217 , G11B2020/1268 , G11B2020/1287 , G11B2020/1298 , G11B2220/216 , G11B2220/218 , G11B2220/2562 , G11B2220/257 , G11B2220/2575
摘要： Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the number of wobble waves and M=2N). The sync signal with such configuration (6 wobbles per bit) is recorded on the head side of the address information (12 wobbles per bit). In this way, even when external noise is large, a modulated wobble signal can be demodulated more accurately.
摘要翻译：地址信息由每个位的M个摆动（整数M是摆动波数）作为基本单位形成，并且被NRZ记录。此外，用于地址信息的同步检测的同步信号由每位N个摆动形成为基本单位（整数N是摆动波数，M = 2N）。具有这种配置的同步信号（每位6个摆动）被记录在地址信息的头侧（每位12个摆动）。以这种方式，即使当外部噪声大时，可以更精确地解调调制的摆动信号。

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