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    Apparatus and method for recording digital video signals
    31.
    发明授权
    Apparatus and method for recording digital video signals 失效
    用于记录数字视频信号的装置和方法

    公开(公告)号：US5502569A

    公开(公告)日：1996-03-26

    申请号：US911488

    申请日：1992-07-10

    申请人： Keiji Kanota

    发明人： Keiji Kanota

    IPC分类号： G11B5/09 ,  G11B20/12 ,  H04N5/7826 ,  H04N5/92 ,  H04N5/926 ,  H04N9/804 ,  H04N9/888 ,  H04N9/79 ,  G11B5/00

    CPC分类号： H04N9/888 ,  H04N5/78266 ,  H04N5/9264 ,  H04N9/804

    摘要： In a digital VCR having a plurality of magnetic heads for recording digital video signals in slant tracks on a magnetic tape, a recording circuit divides a digital input video signal into data blocks and performs an orthogonal transformation, such as the discrete cosine transform, in order to compress the data. The resulting blocks of coefficient data are recorded so that all coefficient data of a given block are recorded together by one of the magnetic heads on a single track. In this way, propagation of errors caused by head clogging or drop-outs is prevented.

    摘要翻译： 在具有用于在磁带上的倾斜轨道中记录数字视频信号的多个磁头的数字VCR中，记录电路将数字输入视频信号划分为数据块，并按顺序执行诸如离散余弦变换之类的正交变换，例如离散余弦变换 压缩数据。 记录所得到的系数数据块，使得给定块的所有系数数据由单个磁道上的一个磁头一起记录在一起。 以这种方式，防止由头部堵塞或脱落引起的误差的传播。

    Magnetic head and a digital recording magnetic head
    32.
    发明授权
    Magnetic head and a digital recording magnetic head 失效
    磁头和数字记录磁头

    公开(公告)号：US5471355A

    公开(公告)日：1995-11-28

    申请号：US216599

    申请日：1994-03-22

    申请人： Seiichi Ogata ,  Moriyuki Kawaguchi ,  Keiji Kanota ,  Yukio Kubota ,  Heikichi Sato ,  Iwao Abe

    发明人： Seiichi Ogata ,  Moriyuki Kawaguchi ,  Keiji Kanota ,  Yukio Kubota ,  Heikichi Sato ,  Iwao Abe

    IPC分类号： G11B5/09 ,  G11B5/48 ,  G11B5/53 ,  G11B20/12 ,  G11B27/032 ,  G11B27/036 ,  H04N9/804 ,  H04N9/806 ,  G11B5/02 ,  G11B5/027 ,  G11B5/127

    CPC分类号： G11B5/4893 ,  G11B20/1208 ,  G11B27/036 ,  G11B5/09 ,  G11B5/534 ,  H04N9/8042 ,  H04N9/8047 ,  H04N9/8066 ,  G11B2220/90 ,  G11B27/032

    摘要： A magnetic head comprises a head base (56), and a pair of magnetic head chips (57, 58) of different azimuth angles (.theta..sub.1, .theta..sub.2) disposed on the head base (56). The pair of magnetic head chips (57, 58) are disposed in a stepped arrangement with respect to the direction of arrangement of tracks on a magnetic recording medium with a step (DA) substantially equal to the pitch (P) of tracks on the magnetic recording medium. The gap distance (GL) between the magnetic gaps of the magnetic head chips (57, 58) is shorter than the sum of the step (D) between adjacent tracks and the length (L) of interblock gap regions between video signal regions and audio signal regions arranged along the direction of the movement of the magnetic head. The magnetic head permits satisfactory audio signal after-recording and extended recording and reproducing of digital video signals on the magnetic recording medium even if the magnetic recording medium is a narrow magnetic tape of 8 mm or less in width.

    摘要翻译： 磁头包括头基座（56）和设置在头座（56）上的不同方位角（θ1，θ2）的一对磁头芯片（57,58）。 一对磁头芯片（57,58）相对于在磁记录介质上的轨道的布置方向呈阶梯状布置，其步长（DA）基本上等于磁性磁道上的磁道间距（P） 记录介质。 磁头芯片（57,58）的磁隙之间的间隙距离（GL）比相邻轨迹之间的台阶（D）和视频信号区域和音频之间的块间间隙区域的长度（L）的和短 信号区域沿着磁头的移动方向布置。 即使磁记录介质是宽度为8mm或更小的窄磁带，磁头也允许在磁记录介质上令人满意的音频信号后记录和数字视频信号的扩展记录和再现。

    Apparatus for magnetically recording digital data
    33.
    发明授权
    Apparatus for magnetically recording digital data 失效
    用于磁记录数字数据的装置

    公开(公告)号：US5416651A

    公开(公告)日：1995-05-16

    申请号：US785413

    申请日：1991-10-30

    申请人： Akihiro Uetake ,  Naofumi Yanagihara ,  Keiji Kanota

    发明人： Akihiro Uetake ,  Naofumi Yanagihara ,  Keiji Kanota

    IPC分类号： G11B5/008 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/73 ,  G11B5/85 ,  G11B20/00 ,  G11B20/14 ,  G11B20/18 ,  H04N5/782 ,  H04N5/7826 ,  H04N5/926 ,  H04N7/26 ,  H04N9/804 ,  H04N9/806 ,  G11B5/02 ,  G11B5/58 ,  H04N5/78

    CPC分类号： H04N9/8063 ,  G11B20/00007 ,  G11B20/1426 ,  G11B20/1813 ,  G11B20/1833 ,  G11B5/0086 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/85 ,  H04N19/98 ,  H04N5/782 ,  H04N5/9261 ,  H04N9/8042 ,  H04N9/806 ,  H04N5/78263 ,  H04N9/8047

    摘要： A digital VTR is provided with a block segmenting circuit for converting an input digital picture signal into data segmented into blocks of picture elements, an encoding circuit for compressing and encoding the output data of the block segmenting circuit block-by-block, a channel encoding circuit for channel encoding the encoded output data from the encoding circuit, an audio signal encoding circuit for encoding an input digital audio signal, and an additional code generating circuit for generating an additional control code which includes subdata. The encoded picture data from the channel encoding circuit, the encoded audio data output from the audio signal encoding circuit, the additional control code and pilot signal data for tracking are recorded in skewed tracks traced on a magnetic tape by a magnetic head or heads mounted on a rotary drum, with each skewed track having pilot signal data recorded at least adjacent the end portion of the track at which the magnetic head enters into contract with such track, subdata recorded at the other end portion at which the magnetic head leaves the track, and the picture data and the audio data recorded at an intermediate portion of the track, so that both picture data and audio data can be reproduced with high quality while the subdata can be played back with relatively high accuracy.

    摘要翻译： 数字VTR设置有块分割电路，用于将输入数字图像信号转换成分割成图像元素的数据，用于逐块压缩和编码块分割电路的输出数据的编码电路，信道编码 用于对来自编码电路的编码输出数据进行信道编码的电路，用于对输入数字音频信号进行编码的音频信号编码电路，以及用于生成包括子数据的附加控制码的附加码产生电路。 来自频道编码电路的编码图像数据，从音频信号编码电路输出的编码音频数据，附加控制代码和用于跟踪的导频信号数据被记录在磁头上的歪斜轨道上，磁头或磁头安装在 旋转滚筒，其中每个歪斜轨迹具有至少邻近轨道的端部处记录的导频信号数据，在该端部处，磁头与磁头离开轨道的另一端部处记录的这种磁道进行收缩， 以及记录在轨道的中间部分的图像数据和音频数据，使得可以以高质量再现图像数据和音频数据，同时可以以相对高的精度回放子数据。

    Digital video tape recorder with time base correction of input video signals
    35.
    发明授权
    Digital video tape recorder with time base correction of input video signals 失效
    具有时基校正输入视频信号的数字录像机

    公开(公告)号：US5212600A

    公开(公告)日：1993-05-18

    申请号：US631096

    申请日：1990-12-19

    申请人： Keiji Kanota

    发明人： Keiji Kanota

    IPC分类号： G11B20/10 ,  H04N5/91 ,  H04N5/926 ,  H04N5/945 ,  H04N5/956

    CPC分类号： H04N5/91 ,  H04N5/926 ,  H04N5/945 ,  H04N5/956

    摘要： A digital video tape recorder for digitally recording and/or reproducing a video signal. An analog video signal is received and converted to a digital signal which is supplied to a time base corrector for correcting a time base error in the input video signal by writing the digital signal into a memory in response to a synchronizing signal derived from the input video signal and reading out the stored digital signal from the memory in response to a reference signal. The output signal of the timebase corrector is processed and recorded on a magnetic tape by a rotary head.

    摘要翻译： 一种用于数字记录和/或再现视频信号的数字录像机。 模拟视频信号被接收并转换为数字信号，该数字信号被提供给时基校正器，用于通过响应于从输入视频导出的同步信号将数字信号写入存储器来校正输入视频信号中的时基误差 响应于参考信号，从存储器读出所存储的数字信号。 时基校正器的输出信号通过旋转头被处理并记录在磁带上。

    Apparatus and method for phase correction of a clock signal by controlling the variable delaying thereof
    36.
    发明授权
    Apparatus and method for phase correction of a clock signal by controlling the variable delaying thereof 失效
    通过控制可变延迟对时钟信号进行相位校正的装置和方法

    公开(公告)号：US5193035A

    公开(公告)日：1993-03-09

    申请号：US558624

    申请日：1990-07-27

    申请人： Keiji Kanota ,  Takahito Seki

    发明人： Keiji Kanota ,  Takahito Seki

    IPC分类号： G11B20/14 ,  H04L7/02 ,  H04L7/033 ,  H04L25/497 ,  H04L27/14 ,  H04N5/93 ,  H04N5/935

    CPC分类号： H04N5/935 ,  H04N5/93

    摘要： In a playback phase correction apparatus for a video recorder, a signal level of an input signal is compared with predetermined reference levels at times according to a playback clock signal. The apparatus operates to continuously detect whether the phase of the playback clock approaches or recedes from a point in time at which the eye pattern of the input signal is at a maximum value by comparing a count value obtained from the comparison results of the reference level counts from a previous cycle with those of the current cycle. Then, the apparatus controls a playback clock delay circuit on the basis of these count values so than an optimal count value is continuously maintained, thus ensuring that the timing of the playback clock is maintained in synchronization with the maximum eye pattern interval of the input signal.