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1. 发明授权

US5119243A Digital signal magnetic recording/reproducing apparatus 失效
标题翻译：数字信号磁记录/重放装置
公开(公告)号：US5119243A
公开(公告)日：1992-06-02
申请号：US452380
申请日：1989-12-19
申请人： Hiroaki Shimazaki , Toyohiko Matsuta , Etsuto Nakatsu , Masafumi Shimotashiro , Masaaki Kobayashi
发明人： Hiroaki Shimazaki , Toyohiko Matsuta , Etsuto Nakatsu , Masafumi Shimotashiro , Masaaki Kobayashi
IPC分类号： G11B5/09 , G11B20/10 , G11B20/14 , H03M5/20
CPC分类号： G11B20/10222 , G11B20/10009 , G11B20/1403 , G11B20/1496 , G11B5/09 , H03M5/20
摘要： A digital signal magnetic recording/reproducing apparatus modulates a digital signal with a carrier and performs recording/reproducing of the modulated signal. The carrier frequency is made equal to the clock frequency multiplied by a factor (N/M), where N and M are integers. The carrier and clock are reproduced using only one phase locked loop. When the carrier-modulated signal is recorded/reproduced using a magnetic recording medium, the phase of the modulated signal is shifted relative to the phase of the carrier. Shifting the clock phase before using the clock for decoding the demodulated signal prevents a degradation of error rate. By periodically inserting a clock phase reference signal in the recording signal, accuracy of adjustment of clock phase is improved.
摘要翻译：数字信号磁记录/再现装置用载波调制数字信号并执行调制信号的记录/再现。载波频率等于时钟频率乘以因子（N / M），其中N和M是整数。载波和时钟仅使用一个锁相环进行复制。当使用磁记录介质记录/再现载波调制信号时，调制信号的相位相对于载波的相位移位。在使用时钟解码解调信号之前切换时钟相位可防止错误率的降低。通过在记录信号中周期性地插入时钟相位参考信号，提高了时钟相位的调整精度。

2. 发明授权

US5062007A Digital signal magnetic recording/reproducing apparatus 失效
标题翻译：数字信号磁记录/重放装置
公开(公告)号：US5062007A
公开(公告)日：1991-10-29
申请号：US450997
申请日：1989-12-15
申请人： Etsuto Nakatsu , Hiroaki Shimazaki , Toyohiko Matsuta , Masafumi Shimotashiro , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Hiroaki Shimazaki , Toyohiko Matsuta , Masafumi Shimotashiro , Masaaki Kobayashi
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B20/10
摘要： A digital signal magnetic recording/reproducing apparatus converts a digital signal into a multi-value digital signal, followed by recording/reproducing the quadrature biphase modulated multi-value quadrature amplitude modulated signal. By using a multi-value quadrature amplitude modulation, a direct current component in the recorded signal can be eliminated, and the utilization efficiency of the recording frequency band of the digital signal magnetic recording/reproducing apparatus can be improved. Also, with respect to the amplitude non-linear characteristic which occurs in the magnetic recording/reproducing process, by providing a compensating circuit during the mapping before recording or after reproducing and demodulating, the deterioration of the S/N ratio of the reproduced and demodulated signal can be reduced to decrease the errors in the decoded data. Furthermore by bias-recording the multi-value quadrature amplitude modulation signal, the non-linearity of the electromagnetic conversion system is alleviated to decrease the deterioration of the S/N ratio due to distortion, thereby making the application of the modulation scheme more reliable.
摘要翻译：数字信号磁记录/再现装置将数字信号转换为多值数字信号，随后记录/再现正交双相调制多值正交幅度调制信号。通过使用多值正交幅度调制，可以消除记录信号中的直流分量，并且可以提高数字信号磁记录/再现装置的记录频带的利用效率。此外，关于在磁记录/再现处理中发生的振幅非线性特性，通过在记录之前或再现和解调之后的映射期间提供补偿电路，再现和解调的S / N比的恶化可以减少信号以减少解码数据中的误差。此外，通过对多值正交幅度调制信号进行偏置记录，可以减轻电磁转换系统的非线性，以减少由于失真引起的S / N比的恶化，从而使得调制方案的应用更可靠。

3. 发明授权

US5124861A Digital signal magnetic recording and playback apparatus employing quadrature amplitude modulation 失效
标题翻译：数字信号磁记录和播放装置采用正交幅度调制
公开(公告)号：US5124861A
公开(公告)日：1992-06-23
申请号：US329720
申请日：1989-03-28
申请人： Masafumi Shimotashiro , Toyohiko Matsuta , Masaaki Kobayashi , Etsuto Nakatsu , Hiroaki Shimazaki
发明人： Masafumi Shimotashiro , Toyohiko Matsuta , Masaaki Kobayashi , Etsuto Nakatsu , Hiroaki Shimazaki
IPC分类号： G11B20/10 , G11B20/14 , H04L27/36 , H04L27/38 , H04N5/926 , H04N5/935 , H04N9/87
CPC分类号： H04L27/362 , G11B20/10 , G11B20/14 , H04L27/3836 , H04N5/926 , H04N5/935 , H04N9/8722
摘要： A digital signal magnetic recording and playback apparatus which is applicable to digital video signals, utilizes quadrature amplitude modulation to produce a recording signal from a digital input signal with a carrier frequency being employed which is less than or equal to than the frequency of a recording system clock signal that is synchronized with the successive data values of the digital input signal. Carrier bursts are periodically inserted into the recording signal with a fixed period, through data inserted by a burst data insertion circuit and the carrier and clock signal are arranged to periodically coincide in phase, with the aforementioned period. The carrier frequency is made equal to the clock frequency multiplied by a factor (n/m), where n and m are integers and n

4. 发明授权

US5255127A Digital modulated signal demodulator/decoder apparatus 失效
标题翻译：数字调制信号解调器/解码装置
公开(公告)号：US5255127A
公开(公告)日：1993-10-19
申请号：US724888
申请日：1991-07-02
申请人： Etsuto Nakatsu , Hiroaki Shimazaki , Haruo Ohta , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Hiroaki Shimazaki , Haruo Ohta , Masaaki Kobayashi
IPC分类号： G11B20/10 , H03M13/39 , H04L1/00 , G11B5/09 , G11B20/06
CPC分类号： H04L1/0047 , G11B20/10009 , H03M13/39 , H04L1/0054
摘要： In transmission or recording of a digital signal by means of digital amplitude and phase modulation, particularly recording into and reproducing the same from the a magnetic recording medium, a digital amplitude/phase modulated signal to be demodulated is commonly affected by the non-linear amplitude characteristics and the effects of unwanted jitter and envelope variation. As the result, the error rate of decoded data will be increased. For compensation, the Viterbi decoding technique is employed with the use of a weighted distance value calculated by multiplying an Euclidean distance between the signal point of a reproduction signal and the datum point of each code by a positive weighting factor which is determined smaller when the code datum point is located further from the origin point of a coordinate system. Accordingly, the weighted distance of each reproduction signal point from its corresponding datum point can approximately be uniform thus ensuring less error decoding in general.

5. 发明授权

US5233479A Apparatus for demodulating and decoding multi-level amplitude modulation signal conveying digital data 失效
标题翻译：用于解调和解码传送数字数据的多电平幅度调制信号的装置
公开(公告)号：US5233479A
公开(公告)日：1993-08-03
申请号：US591240
申请日：1990-10-01
申请人： Etsuto Nakatsu , Haruo Ohta , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Haruo Ohta , Masaaki Kobayashi
IPC分类号： G11B20/06 , G11B20/10 , H04L27/38
CPC分类号： G11B20/06 , G11B20/10
摘要： An apparatus for demodulating and decoding a multi-level amplitude modulation signal used to convey digital data, such as a QAM signal, having amplitude modulated carrier components differing in phase. The apparatus derives demodulated data values from that signal, and derives from average values of sets of these data values a set of compensated reference point data respectively corresponding to signal reference points of the multi-level modulation signal which are expressible as a symbol constellation in the I-Q plane. The compensated reference point data are used to obtain correct digital code values from the demodulated data, even if there is considerable distortion of the multi-level amplitude modulated signal, as is the case for such a signal when recorded and reproduced from a magnetic recording medium.
摘要翻译：一种用于解调和解码用于传送诸如QAM信号的数字数据的多电平幅度调制信号的装置，其具有相位不同的幅度调制载波分量。该装置从该信号导出解调的数据值，并且从这些数据值的集合的平均值中导出分别对应于多电平调制信号的信号参考点的一组补偿参考点数据，这些参考点数据可表示为智商飞机。补偿参考点数据用于从解调数据获得正确的数字码值，即使在多电平幅度调制信号存在相当大的失真的情况下，如在从磁记录介质记录和再现时的这种信号的情况。

6. 发明授权

US5465158A Video tape recorder capable of recording and reproducing wide-band chrominance signal 失效
标题翻译：能够记录和再现宽带色度信号的录像机
公开(公告)号：US5465158A
公开(公告)日：1995-11-07
申请号：US409964
申请日：1995-03-24
申请人： Yoshihiro Morioka , Masaaki Kobayashi , Mutsuyuki Okayama , Etsuto Nakatsu , Kohei Suzuki
发明人： Yoshihiro Morioka , Masaaki Kobayashi , Mutsuyuki Okayama , Etsuto Nakatsu , Kohei Suzuki
IPC分类号： G11B5/53 , H04N9/797 , H04N9/80 , H04N9/815 , H04N9/82 , H04N9/83 , H04N9/79
CPC分类号： H04N9/83 , H04N9/8205
摘要： In a video tape recorder of the color under recording type, in which a low frequency band converted carrier chrominance signal is recorded together with an FM luminance signal, another FM modulator is provided for modulating a wide band chrominance signal. An additional head records the FM chrominance signal on at least a part of a track on which video signal has been recorded in the color under recording. In reproduction, it is checked whether the FM chrominance signal is reproduced or not for selecting the FM chrominance signal or the color under recorded carrier chrominance signal as a reproduced chrominance signal output.
摘要翻译：在与FM亮度信号一起记录低频带转换载波色度信号的记录类型的彩色录像机中，提供另一FM调制器用于调制宽带色度信号。附加的头在记录有颜色的视频信号的轨道的至少一部分上记录FM色度信号。在再现中，检查FM色度信号是否被再现，用于选择FM色度信号或记录载波色度信号下的颜色作为再现的色度信号输出。

7. 发明授权

US5402272A Digital signal magnetic recording/reproducing apparatus using amplitude phase shift keying and frequency-multiplexing 失效
标题翻译：使用幅度相移键控和频率复用的数字信号磁记录/再现装置
公开(公告)号：US5402272A
公开(公告)日：1995-03-28
申请号：US178623
申请日：1994-01-07
申请人： Etsuto Nakatsu , Haruo Ohta , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Haruo Ohta , Masaaki Kobayashi
IPC分类号： G11B20/10 , G11B5/09 , G11B5/02
CPC分类号： G11B20/10
摘要： A digital signal magnetic recording/reproducing apparatus subjects a digital signal to a digital amplitude phase shift keying and records and reproduces the modulated signal thus obtained on a magnetic recording medium. Use of the digital amplitude phase shift keying technique makes it possible to remove the direct-current component in the recording signals, and to improve the utilization efficiency of the recording frequency band, thus making high density recording possible. In addition, since a plurality of modulated signals are frequency-multiplexed and recorded, almost the entire frequency band recordable on a magnetic recording medium can be utilized, resulting in an increase in recording density. Further in addition, a pilot signal produced by frequency-converting a carrier is frequency-multiplexed with a modulated signal and recorded and reproduced and the carrier is reproduced from the reproduced pilot signal, so that a redundant part for reproducing the carrier is not necessary.
摘要翻译：数字信号磁记录/再现装置使数字信号进行数字幅度相移键控，并记录并再现由磁记录介质获得的调制信号。使用数字幅度相移键控技术可以消除记录信号中的直流分量，并提高记录频带的利用效率，从而使得高密度记录成为可能。此外，由于多个调制信号被频率复用和记录，所以可以利用可记录在磁记录介质上的几乎整个频带，导致记录密度的增加。此外，通过对载波进行频率转换而产生的导频信号与调制信号进行频率复用并被记录和再现，并且从再现的导频信号再现载波，从而不需要用于再现载波的冗余部分。

8. 发明授权

US5335125A Video signal magnetic recording and reproducing apparatus 失效
标题翻译：视频信号磁记录和再现装置
公开(公告)号：US5335125A
公开(公告)日：1994-08-02
申请号：US969482
申请日：1992-10-30
申请人： Etsuto Nakatsu , Yoshihiro Morioka , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Yoshihiro Morioka , Masaaki Kobayashi
IPC分类号： G11B5/008 , G11B15/12 , G11B15/18 , G11B15/467 , H04N5/765 , H04N5/7826 , H04N5/926 , H04N5/945 , H04N9/79 , H04N9/83 , H04N5/78
CPC分类号： G11B15/1875 , G11B15/125 , H04N5/9264 , H04N5/9268 , H04N9/7921 , H04N9/83 , G11B15/4673 , H04N5/945
摘要： A video tape recorder capable of recording a normal definition video signal and a high definition video signal having an image quality higher than the normal one in a simulcast for broadcasting an identical program in a conventional broadcasting system and a high definition system. The common video signal is recorded in a conventional analog signal format at a tape feeding speed of the normal mode by an EP mode head defining a tracking width narrower than that of a standard mode head, while the high definition video signal is recorded in a digital form by a high definition video head additionally mounted on a rotary drum. Additionally, a common video signal recorded by a conventional video tape recorder can be reproduced.
摘要翻译：一种能够记录正常清晰度视频信号的磁带录像机和具有高于普通视频信号的图像质量的高分辨率视频信号，用于在常规广播系统和高分辨率系统中广播相同节目。公共视频信号以常规模式信号格式以通常模式的磁带馈送速度通过限定比标准模式磁头窄的跟踪宽度的EP模式磁头记录，而高分辨率视频信号被记录在数字通过另外安装在旋转鼓上的高清晰度视频头来形成。此外，可以再现由常规磁带录像机记录的公共视频信号。

9. 发明申请

US20090067535A1 TRANSFER DEVICE 审中-公开
标题翻译：传输设备
公开(公告)号：US20090067535A1
公开(公告)日：2009-03-12
申请号：US11817400
申请日：2006-04-06
申请人： Toshikazu Koudo , Kazuhiro Mihara , Masaharu Tsujimura , Etsuto Nakatsu
发明人： Toshikazu Koudo , Kazuhiro Mihara , Masaharu Tsujimura , Etsuto Nakatsu
IPC分类号： H04L27/00
CPC分类号： H04N21/4344 , H04L12/2803 , H04L12/2838 , H04L2012/2849 , H04N21/23608 , H04N21/4305 , H04N21/43615 , H04N21/43632
摘要： A transfer device for receiving packets that were transmitted by a device in a home network onto a transmission path, and transfers the received packet to another device. The stream to be transferred is classified into three types: (i) a type where each of packets constituting the stream is not attached with a time stamp; (ii) a type where each packet is attached with a valid time stamp; and (iii) a type where each packet is attached with an invalid time stamp. The transfer device determines, from among the three types, the type of the stream to be transferred, based on a transfer source device, transfer destination device, and provider of the stream. The transfer device then selects a transmission method by which to transfer the stream, among the time stamp attachment transmission method and the PCR reference transmission method.
摘要翻译：一种用于接收由家庭网络中的设备发送到传输路径上的分组的传送设备，并将接收的分组传送到另一设备。要传输的流被分为三种类型：（i）其中每个构成流的分组不附加时间戳的类型; （ii）每个分组附有有效时间戳的类型; 和（iii）每个分组附有无效时间戳的类型。传输设备根据传输源设备，传送目的地设备和流的提供者，从三种类型中确定要传送的流的类型。然后，在时间戳附着发送方法和PCR参考发送方法之间，转移装置选择传输流的传输方法。

10. 发明申请

US20080031597A1 Stream Recording/Reproducing Apparatus 审中-公开
标题翻译：流记录/再现装置
公开(公告)号：US20080031597A1
公开(公告)日：2008-02-07
申请号：US11628578
申请日：2005-07-11
申请人： Etsuto Nakatsu
发明人： Etsuto Nakatsu
IPC分类号： H04N7/26
CPC分类号： H04N5/765 , G11B27/034 , G11B27/329 , G11B2220/216 , G11B2220/2516 , G11B2220/2541 , G11B2220/2562 , G11B2220/2575 , G11B2220/455 , H04N5/781 , H04N5/85 , H04N9/8042
摘要： The present invention provides a stream recording/reproducing apparatus that records a stream onto a first recording medium without using extra recording capacity of such first recording medium, and then dubs such stream onto a second recording medium at high speed while minimizing the degradation in image quality and sound quality. The stream recording/reproducing apparatus of the present invention includes: an analysis unit (6) that judges whether or not a stream (101) is compliant with the logic specification of a second recording medium (7); a management information recording unit (8) that records a result of the judgment onto a first recording medium (3); a TS recording processing unit (2) that records the stream (101) onto the medium (3); processing units (14) and (15) that convert the stream (101) recorded on the medium (3) into a stream that is compliant with the logic specification of the medium (7) in the case where the stream (101) is not compliant with the logic specification of the medium (7); and a PS recording processing unit (17) that records the converted stream onto the medium (7).
摘要翻译：本发明提供了一种流记录/再现装置，其将流量记录在第一记录介质上，而不需要使用这种第一记录介质的额外的记录容量，然后将该流高速转录到第二记录介质上，同时最小化图像质量的降低和音质。本发明的流记录/再现装置包括：分析单元（6），其判断流（101）是否符合第二记录介质（7）的逻辑规范; 管理信息记录单元，其将所述判断结果记录在第一记录介质上; 将流（101）记录到介质（3）上的TS记录处理单元（2）; 在流（101）不是的情况下，将记录在介质（3）上的流（101）转换为符合介质（7）的逻辑指定的流的处理单元（14）和（15）符合介质（7）的逻辑规范; 以及将转换的流记录到介质（7）上的PS记录处理单元（17）。

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