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1. 发明公开

EP0101179A2 Reduction of crosstalk effects in modulated audio signals carried in adjacent tracks of recorded media 失效
标题翻译：的记录在记录载体的相邻轨道的调制的音频信号串扰效应的抑制。
公开(公告)号：EP0101179A2
公开(公告)日：1984-02-22
申请号：EP83303976.1
申请日：1983-07-07
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Todd, Craig C.
IPC分类号： G11B5/04 , G11B5/02
CPC分类号： G11B20/22 , H04N9/7908 , H04N9/802
摘要： This invention reduces crosstalk interference components without a significant increase in recorded bandwidth of the modulated audio signals and without a significant degradation of the signal-to-noise ratio of the reproduced audio signals. According to the invention, the nominal carrier frequency of the modulated audio signal in adjacent tracks or scans is offset by an amount sufficient to shift the crosstalk interference components outside the desired audio pass band for substantially all modulating amplitudes and frequencies. At the same time, the modulated audio frequency spectra of the adjacent tracks substantially overlap so that additional overall bandwidth requirements are minimized. A satisfactory offset from track to track is in the order of twice the maximum audio response frequency. As the offset is reduced or as occasional high frequency high amplitude audio occurs in adjacent tracks, crosstalk distortion components will tend to appear beginning at the high frequencies. Such crosstalk interference can be further reduced by the use of frequency dependent compressor-expander noise reduction because of the audio band rather than across the entire audio band as in the case of no track-to-track carrier offset, In one example audio signals are frequency modulated and recorded on a helical scan recorder using carrier frequencies f 1 and f 2 for odd and even scans. On playback the signals from odd and even scans are processed by respective limiters 6 and 8 respective demodulators 10 and 12 and respective high pass filters 14 and 16.
摘要翻译：本发明减少了串音干扰分量而不会在调制的音频信号的记录带宽的增加显著和没有再现的音频信号的信噪比的显著降解。。根据本发明，在相邻轨道或扫描经调制的音频信号的额定载频是通过在足够量的串扰干扰分量的期望的音频通带外的转移基本上所有调制幅度和频率偏移量。在在Sametime，相邻轨道的调制的音频频谱基本上重叠所以也附加总带宽需求最小化。令人满意的从轨道偏移跟踪是在两倍最大频率音频响应的顺序。作为减少或偶尔的高频高幅音频在发生相邻轨道的偏移，串音失真分量将趋向于出现在高频率下开始。搜索串话干扰可以通过使用由于干扰的倾向的依赖于频率的压缩膨胀降噪可以进一步减少在音频带的一个部分，而不是在整个音频带定位在没有轨道的情况下 -Track载波偏移。

2. 发明公开

EP0024390A4 NOISE REDUCTION APPARATUS. 失效
标题翻译： LÄRMDÄMPFUNGSAPPARAT。
公开(公告)号：EP0024390A4
公开(公告)日：1981-09-01
申请号：EP79901455
申请日：1980-09-24
申请人： RIDDLE H S JUN
发明人： RIDDLE JR HERBERT S
IPC分类号： G11B5/00 , G11B5/02 , G11B20/06 , G11B20/22 , G11B23/00 , G11B5/04 , H04B15/00
CPC分类号： G11B23/0007 , G11B20/06 , G11B20/22

3. 发明公开

EP0077631A1 Signal phase and amplitude equalising circuit 失效
标题翻译： Schaltungsanordnung zum Ausgleichen der Phasen- und Amplitudenentzerrung eines Signals。
公开(公告)号：EP0077631A1
公开(公告)日：1983-04-27
申请号：EP82305415.0
申请日：1982-10-12
申请人： SPERRY CORPORATION
发明人： Schwartz, Allan Abraham
IPC分类号： G11B5/04 , G11B5/09
CPC分类号： G11B20/10212 , G11B5/035
摘要： A signal phase and amplitude equalising circuit is described which is simple and allows for convenient and independent adjustment of phase and amplitude correction.
The signal from a magnetic read head (10) is twice delayed and amplified by delay lines (12, 15) and amplifiers (13, 16). The original signal and the twice-delayed signal are added by resistors (17,18) at least one of which is adjustable. and a proportion of the sum selected by potentiometer (19) is subtracted from the once-delayed signal by a differential amplifier (14) to give an equalised signal of corrected phase and amplitude.
Preferred ranges for the first and second delays are respectively four-tenths to one and five-tenths and three-tenths to one and four-tenths of the fifty-percent amplitude of the input pulse and the amplifiers (13 and 16) preferably have a gain of substantially unity.
摘要翻译：描述了信号相位和幅度均衡电路，其简单，并且允许相位和幅度校正的方便和独立的调整。来自磁读头（10）的信号被延迟两倍并被延迟线（12,15）和放大器（13,16）放大。原始信号和两倍延迟的信号由电阻器（17,18）相加，其中至少一个是可调节的，并且通过差分放大器从一次延迟的信号中减去由电位器（19）选择的总和的一部分（14）给出校正相位和振幅的均衡信号。第一和第二延迟的优选范围分别是输入脉冲的50％幅度的四分之一到十分之一十分之一和十分之一十分之一到四分之一十分之一，并且放大器（13和16）优选地具有获得大幅度统一。

4. 发明公开

EP0100961A1 Demodulation with error detecting capability 失效
标题翻译：解散者Fehler-Feststellungsfähigkeit。
公开(公告)号：EP0100961A1
公开(公告)日：1984-02-22
申请号：EP83107384.6
申请日：1983-07-27
申请人： International Business Machines Corporation
发明人： Matsumoto, Takeshi
IPC分类号： G11B5/04
CPC分类号： G11B20/1419
摘要： In a demodulator for recovering data from a frequency ' modulated data signal having clock peaks and data peaks read from a record medium, error detection is accomplished by checking the occurrence of the peaks of the signal relative to three windows. The time lengths of the windows are varied after each clock peak so that they are proportionally related to a length of interval between a clock peak and the preceding one.
摘要翻译：在用于从具有从记录介质读取的时钟峰值和数据峰值的频率调制数据信号中恢复数据的解调器中，通过检查相对于三个窗口的信号峰值的出现来实现错误检测。窗口的时间长度在每个时钟峰值之后变化，使得它们与时钟峰值和前一个时钟峰值之间的间隔长度成比例地相关。

5. 发明授权

US5852524A Sampled amplitude read channel for processing multiple data streams in a disc storage system 失效
标题翻译：采样振幅读通道，用于在盘存储系统中处理多个数据流
公开(公告)号：US5852524A
公开(公告)日：1998-12-22
申请号：US797525
申请日：1997-05-27
申请人： Neal Glover , Howard H. Sheerin
发明人： Neal Glover , Howard H. Sheerin
IPC分类号： G11B5/588 , G11B5/592 , G11B20/10 , G11B20/14 , G11B20/20 , G11B5/04
CPC分类号： G11B20/10055 , G11B20/10009 , G11B20/10037 , G11B20/1403 , G11B20/20 , G11B5/588 , G11B5/5921 , G11B5/5926
摘要： In a disc storage system employing multiple recording heads to increase throughput by providing simultaneous access through multiple data streams, a sampled amplitude read channel is disclosed for detecting, in parallel, estimated data sequences from the read signals associated with each data stream. Timing recovery in the read channel is implemented through interpolation, that is, by asynchronously sampling the analog read signals and interpolating to synchronous sample values. In this manner, a frequency synthesizer can generate a single reference clock for clocking operation of all the discrete time circuitry, thereby eliminating noise caused by multiple clocks as well as simplifying diagnostics. Furthermore, interpolated timing recovery avoids noise due to cross-talk between voltage controlled oscillators (VCOs) that would likely occur in a conventional synchronous sampling timing recovery design. A significant advantage is that the read channel can reside in a single integrated circuit.
摘要翻译：在采用多个记录头通过提供通过多个数据流的同时访问来提高吞吐量的盘存储系统中，公开了一种采样幅度读取信道，用于并行地从与每个数据流相关联的读取信号中检测估计的数据序列。读通道中的定时恢复通过插值实现，即通过异步采样模拟读取信号并内插到同步采样值。以这种方式，频率合成器可以产生用于所有离散时间电路的时钟运算的单个参考时钟，从而消除由多个时钟引起的噪声以及简化诊断。此外，内插定时恢复避免了由于在常规同步采样定时恢复设计中可能发生的压控振荡器（VCO）之间的串扰造成的噪声。显着的优点是读取通道可以驻留在单个集成电路中。

6. 发明授权

US4435734A FM Video recording and reproducing system 失效
标题翻译： FM视频录制和再现系统
公开(公告)号：US4435734A
公开(公告)日：1984-03-06
申请号：US320620
申请日：1981-11-12
申请人： David J. Hedberg , C. Gary Nilsson
发明人： David J. Hedberg , C. Gary Nilsson
IPC分类号： G11B20/06 , H04N5/92 , H04N7/22 , H04N5/91 , G11B5/04 , H04N5/76 , H04N9/491
CPC分类号： H04N5/92 , G11B20/06 , H04N7/22
摘要： High resolution video signals of bandwidth up to 25 mHz are recorded magnetically or optically, or are transmitted on a communications channel carrier with superior fidelity by using novel electronic circuit system including implementations of an FM modulator, writing amplifier, and wideband discriminator which enable coding and decoding with high accuracy, low noise, and low interference. The video signals are used to directly modulate a square wave carrier using an FM technique employing a very low center frequency-to-bandwidth ratio without need for subsequent frequency translations. A writing amplifier provides gain needed for saturated recording with unique provisions to balance transition amplitudes for minimum second harmonic distortion without affecting the primary phasing of transitions. A novel multiwinding inductor and pulse discriminator implementation is capable of demodulating the very wide deviation FM signal with good cancellation of the second harmonic and fundamental FM carrier spectrums. Novel electronic circuit techniques are disclosed to provide high levels of performance with simple implementations of the electronic hardware.
摘要翻译：通过使用包括FM调制器，写入放大器和宽带鉴别器的实现的新颖的电子电路系统，以磁性或光学方式记录高达25mHz的带宽的高分辨率视频信号，或者通过使用新颖的电子电路系统在具有高保真度的通信信道载体上传输，解码精度高，噪音低，干扰小。视频信号用于使用采用非常低的中心频率与带宽比的FM技术直接调制方波载波，而不需要随后的频率转换。写入放大器提供饱和记录所需的增益，具有独特的规定，以平衡过渡幅度以实现最小二次谐波失真，而不会影响转换的初级定相。一种新颖的多绕组电感器和脉冲鉴频器实现能够解调非常宽的偏差FM信号，具有良好的二次谐波和基波调频载波频谱的抵消。公开了新颖的电子电路技术以通过电子硬件的简单实现来提供高水平的性能。

7. 发明授权

US4334249A Apparatus for use in recording a pulse signal on a magnetic recording medium 失效
标题翻译：用于在磁记录介质上记录脉冲信号的装置
公开(公告)号：US4334249A
公开(公告)日：1982-06-08
申请号：US107355
申请日：1979-12-26
申请人： Eiichi Yokoyama
发明人： Eiichi Yokoyama
IPC分类号： G11B20/10 , H04L27/02 , G11B5/04 , G11B15/02
CPC分类号： G11B20/10
摘要： Apparatus is described which is particularly useful for recording pulse signals on a magnetic recording medium. The apparatus includes an amplitude modulator, preferably a balanced modulator, that is supplied with the pulse signal and with a carrier upon which the pulse signal is amplitude-modulated. The pulse signal has gradually rising and falling edges which exhibit a maximum gradient. The modulated carrier is substantially fully suppressed when the maximum gradient of the pulse signal traverses a predetermined level. Preferably, the modulation factor of the amplitude modulator is greater than unity. When used with additional recording apparatus, the balanced modulated signal is filtered by a vestigial sideband filter, and the filtered, balanced modulated signal is frequency-converted to a lower frequency band. The frequency-converted balanced modulated signal is superimposed with an AC bias signal and then recorded.
摘要翻译：描述了对磁记录介质上记录脉冲信号特别有用的装置。该装置包括幅度调制器，优选地是平衡调制器，其被提供脉冲信号和与其上的脉冲信号进行幅度调制的载波。脉冲信号具有呈现最大梯度的逐渐上升和下降沿。当脉冲信号的最大梯度穿过预定水平时，调制载波基本上被完全抑制。优选地，幅度调制器的调制因子大于1。当与附加记录装置一起使用时，平衡调制信号被残留边带滤波器滤波，并且滤波的平衡调制信号被频率转换成较低的频带。频率转换的平衡调制信号与AC偏置信号叠加，然后记录。

8. 发明授权

US3862355A Helical scan wide band tape recorder apparatus and method 失效
标题翻译：螺旋扫描带带记录仪和方法
公开(公告)号：US3862355A
公开(公告)日：1975-01-21
申请号：US28592272
申请日：1972-09-01
申请人： INT VIDEO CORP
发明人： GUISINGER BARRETT EARL
IPC分类号： G11B5/027 , H04N5/7826 , H04N9/79 , G11B15/52 , G11B5/04
CPC分类号： H04N5/78266 , H04N9/7925
摘要： A format particularly useful in a high quality video tape recorder for use in broadcast applications and other wide band signal applications such as data recording. A single mechanical structure with modifications in electronics is used for all major international television standards: NTSC (525 line, 60Hz) and PAL/SECAM (625 line, 50Hz), with no signal degradation in PAL/SECAM. Provision is made for two high quality audio tracks, a cue track, and an address track in addition to the video tracks, which are relatively short in length, each of which carries a segment of a video frame. The video track configuration permits relatively small physical dimensions for the recorder while providing excellent interchange characteristics among machines.
摘要翻译：在用于广播应用和诸如数据记录的其他宽带信号应用的高质量录像机中特别有用的格式。所有主要的国际电视标准均采用单电子机械结构：NTSC（525线，60Hz）和PAL / SECAM（625线，50Hz），PAL / SECAM无信号衰减。除了长度相对较短的视频轨道之外，还提供了两个高质量音频轨道，提示轨道和地址轨道，每个视频轨道都带有一段视频帧。视频轨道配置允许记录器的相对较小的物理尺寸，同时在机器之间提供优异的交换特性。

9. 发明授权

US3855615A Noise reduction apparatus employing parametric frequency dividers with large division factors 失效
标题翻译：使用具有大的部门因素的参数频率分配器的噪声减少装置
公开(公告)号：US3855615A
公开(公告)日：1974-12-17
申请号：US32567373
申请日：1973-01-22
申请人： SHEN M
发明人： SHEN M
IPC分类号： G11B20/22 , G11B5/04
CPC分类号： G11B20/225
摘要： There is disclosed a record-playback apparatus which employs a relatively high frequency conversion oscillator as a carrier source for impressing thereon by means of a modulator an information bearing signal encompassing a given range of frequencies. The high frequency FM signal is divided by a parametric divider to develop at an output a low frequency FM signal, wherein this signal is centered about a frequency for optimum tape response. A playback scheme retrieves the signal recorded on the tape, multiplies the same by the division factor, discriminates the signal to provide at an output the original information bearing signal, which can then be applied to speakers or some suitable display, as a television receiver in the case of video information signals.
摘要翻译：公开了一种记录重放装置，该装置采用相对较高的频率转换振荡器作为载波源，借助于调制器在其上施加包含给定频率范围的信息承载信号。高频FM信号被参数分频器分频，以在输出端产生低频FM信号，其中该信号以一个频率为中心，以获得最佳的磁带响应。播放方案检索记录在磁带上的信号，将其乘以除法因子，鉴别信号以在输出端提供原始信息承载信号，然后可将其作为电视接收机应用于扬声器或某些合适的显示器视频信息信号的情况。

10. 发明授权

US3736371A Method and arrangement for reducing the color line noise in the storage and transmision of color television signals 失效
标题翻译：彩色电视信号存储和传输中彩色线噪声的方法和装置
公开(公告)号：US3736371A
公开(公告)日：1973-05-29
申请号：US3736371D
申请日：1970-09-18
申请人： BOSCH GMBH ROBERT
发明人： KRAUSE G
IPC分类号： H04N9/455 , H04N9/80 , H04N5/78 , G11B5/04 , H04N5/04
CPC分类号： H04N9/80 , H04N9/455
摘要： The color synchronizing signal is derived from the color television signal before the latter is modulated onto a carrier. After modulation a signal derived from the color synchronizing signal by frequency multiplication and/or division, is added to the modulated color television signal. The derived signal can be the blanking value or the synchronizing value. Before the television signal is demodulated, the derived signal is removed, and the color synchronizing signal reobtained by a mathematical operation that is a reciprocal of the first operation.
摘要翻译：彩色同步信号从彩色电视信号得到，后者被调制到载体上。在调制之后，通过频率相乘和/或除法从色同步信号得到的信号被加到调制彩色电视信号上。导出信号可以是消隐值或同步值。在电视信号被解调之前，导出的信号被去除，并且颜色同步信号通过与第一操作相反的数学运算重新获得。

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