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公开(公告)号：US4875112A
公开(公告)日：1989-10-17
申请号：US815110
申请日：1985-12-31
CPC分类号： G11B20/10046 , G11B20/10009 , G11B5/035
摘要： A pulse signal conditioner filters and equalizes signal pulses representing digital data whether or not obtained from a magnetic recording device. Modified low pass filters filter the pulse signals and also derive and feed forward the second time derivative of the filtered pulse signals. The filtered pulse and the second time derivative thereof are combined to slim the pulse. Further slimming is provided by delay line equalizers having three paths. A first path for attenuating the pulse signals, a second path for delaying the pulse signals for a first delay, and a third path for delaying the pulse signals for a second delay and attenuation. Pulse signals from the three paths are combined to further slim the pulse.
摘要翻译： 脉冲信号调理器对表示数字数据的信号脉冲进行滤波和均衡，无论是否从磁记录装置获得。 改进的低通滤波器对脉冲信号进行滤波，并且还导出和前馈滤波后的脉冲信号的第二时间导数。 滤波脉冲及其第二时间导数被组合以使脉冲变薄。 由具有三条路径的延迟线均衡器进一步减薄。 用于衰减脉冲信号的第一路径，用于延迟第一延迟的脉冲信号的第二路径和用于延迟脉冲信号以进行第二延迟和衰减的第三路径。 来自三个路径的脉冲信号被组合以进一步减小脉冲。
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公开(公告)号：US5228076A
公开(公告)日：1993-07-13
申请号：US652952
申请日：1991-02-08
申请人： Emil Hopner , Stanley M. Head
发明人： Emil Hopner , Stanley M. Head
IPC分类号： H04Q11/04
CPC分类号： H04Q11/0407 , H04Q11/04
摘要： A user-orientated telephone instrument including high-fidelity speech encoding, encryption capability and many function presently provided by centralized call processing is described. Utilizing an ADPCM encoding process including forward error correction, a high quality relatively noise immune signal is provided. To the user, the instrument appears as a unique electronic telephone which offers many special services to facilitate communications with other people and with computers. Advanced features such as optional hands-off voice on/off-hook control, personal identification by voice print and remote chart presentation are provided.
摘要翻译： 描述了一种面向用户的电话乐器，包括高保真语音编码，加密能力和目前通过集中呼叫处理提供的许多功能。 利用包括前向纠错的ADPCM编码过程，提供了高质量的相对噪声免疫信号。 对于用户而言，该仪器是独一无二的电子电话，提供许多特殊服务，以方便与其他人和计算机的通信。 提供了高级功能，例如可选的手动断开语音开/关机控制，通过语音打印进行个人识别和远程图表显示。
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公开(公告)号：US5150357A
公开(公告)日：1992-09-22
申请号：US365175
申请日：1989-06-12
IPC分类号： H04Q11/04
CPC分类号： H04Q11/04 , H04Q11/0407
摘要： Information pathways for communications among personnel, among computers, and between personnel and computers, in a local communication system, including remote communications via leased lines or the public network is described. To a public central office, the present invention appears as a private branch exchange (PBX), served by many trunks, WATS, and "Foreign Exchange" lines, and providing all the standard PBX services; to the remote leased facility, it appears as a standard tie line terminator or, if the remote is another ICS, as a logical tie line terminator for which several logical tie lines are combined into each leased T1 line; to the in-house computer, it provides switched connection to other computers or to terminals at up to 19,200 Baud modulated data, at 32K-Baud for native (internal system) data (including 2K-Baud of forward error correction), or up to several gigabits direct binary transmission (such as the transmission scheme used with NDS and ANR displays, etc.); to the in-house human user, it appears as a unique electronic telephone which offers many special services to facilitate his communications with other people and with computers. Advanced features such as optional hands-off voice on/off hook control, personal identification by voice print and remote chart presentation are provided.
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公开(公告)号：US4819091A
公开(公告)日：1989-04-04
申请号：US45967
申请日：1987-04-30
申请人： Blasius Brezoczky , Emil Hopner
发明人： Blasius Brezoczky , Emil Hopner
摘要： A high speed magnetic disk recording system is described in which the recording medium comprises a substrate having a magnetic coating thereon, and a magnetic recording transducer is operated in physical contact with the recording medium. The magnetic transducer comprises a single crystal material on at least the surface which contacts the recording medium. The single crystal material has a high thermal conductivity, a low friction coefficient and a high surface energy so that, when relative motion is provided between the magnetic recording transucer and the recording medium, an attractive force is generated which maintains the magnetic recording transducer in contact with the recording medium so that high density recorded data can be reliably written and sensed without excessive wear to either the magnetic transducer or the recording medium.
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