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1.发明授权
公开(公告)号：US5465158A
公开(公告)日：1995-11-07
申请号：US409964
申请日：1995-03-24
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。
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公开(公告)号：US5335125A
公开(公告)日：1994-08-02
申请号：US969482
申请日：1992-10-30
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。
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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
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。
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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
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。
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公开(公告)号：US5255127A
公开(公告)日：1993-10-19
申请号：US724888
申请日：1991-07-02
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.
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6.发明授权Digital signal magnetic recording/reproducing apparatus using amplitude phase shift keying and frequency-multiplexing 失效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
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。
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7.发明授权
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
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
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8.发明授权Apparatus for demodulating and decoding multi-level amplitude modulation signal conveying digital data 失效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
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 。
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公开(公告)号：US08643745B2
公开(公告)日：2014-02-04
申请号：US12521865
申请日：2008-03-11
CPC分类号： H04N5/772 , H04N5/147 , H04N9/8205
摘要： A content shooting apparatus is provided which is suitable for generating a digest meeting the user's desire.A scene information generation portion detects a characteristic scene with reference to a parameter contained in either video/audio in content recorded during shooting operation information for the shooting apparatus, and generates scene information, an auxiliary information assignment portion assigns the scene information its type, priority, start time, end time, or representative time as auxiliary information in accordance with a prescribed rule, a listing portion makes a list of the scene information and the auxiliary information thereof, and a scene sorting-out portion sorts out scenes from the content with reference to the priority, such that the number of scenes is within a predetermined range.
摘要翻译： 提供一种内容拍摄装置，其适于产生满足用户愿望的摘要。 场景信息生成部，参照拍摄装置的拍摄操作信息中记录的内容中包含的视频/音频中包含的参数来检测特征场景，生成场景信息，辅助信息分配部将场景信息分类为优先级 ，开始时间，结束时间或代表时间作为根据规定规则的辅助信息，列表部分列出场景信息及其辅助信息，并且场景分拣部分从内容中排除场景， 参考优先权，使得场景的数量在预定范围内。
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公开(公告)号：US20090103898A1
公开(公告)日：2009-04-23
申请号：US12298644
申请日：2007-09-12
申请人： Yoshihiro Morioka , Kenji Matsuura , Masaaki Kobayashi , Akihiro Takeuchi , Takashi Kurama , Hisashi Inoue , Takeshi Hamasaki , Michifumi Inai , Masakazu Mimura
发明人： Yoshihiro Morioka , Kenji Matsuura , Masaaki Kobayashi , Akihiro Takeuchi , Takashi Kurama , Hisashi Inoue , Takeshi Hamasaki , Michifumi Inai , Masakazu Mimura
IPC分类号： H04N5/00
CPC分类号： H04N5/772 , G11B27/034 , G11B27/28 , H04N9/8042 , H04N9/8205
摘要： In a content shooting apparatus (Acc) for recording content data (Sav) containing video, audio, or data onto an information recording medium (214), in combination with first metadata (Di, Dm) containing a parameter representing scene information (SI), and allowing access to a specific portion of the content (Sav) with reference to the scene information (SI), a camera microcomputer (206) detects movement of a camera (101) to generate the first metadata (Di, Dm) by comparing the detected movement with a predetermined value (Th), and also generates second meta data (Di, Dm) by filtering out the first metadata (Di, Dm) generated within a predetermined specific window period (W) via a predetermined function.
摘要翻译： 在包含视频，音频或数据的内容数据（Sav）的内容拍摄装置（Acc）中，与包含表示场景信息（SI）的参数的第一元数据（Di，Dm）结合在信息记录介质（214） ，并且参照场景信息（SI）允许访问内容（Sav）的特定部分，照相机微计算机（206）通过比较来检测照相机（101）的移动以生成第一元数据（Di，Dm） 检测到的具有预定值（Th）的移动，并且还通过经由预定功能滤除在预定特定窗口周期（W）内生成的第一元数据（Di，Dm）来生成第二元数据（Di，Dm）。
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