利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

62 条记录 (耗时 0.028 秒)

    Color video and audio recording and/or reproducing apparatus
    41.
    发明授权
    Color video and audio recording and/or reproducing apparatus 失效
    彩色视频和音频记录和/或再现装置

    公开(公告)号：US4805035A

    公开(公告)日：1989-02-14

    申请号：US34022

    申请日：1987-04-03

    申请人： Hiroshi Kawakami ,  Takato Narita

    发明人： Hiroshi Kawakami ,  Takato Narita

    IPC分类号： H04N9/802 ,  H04N9/82 ,  H04N9/825 ,  H04N9/86

    CPC分类号： H04N9/8205 ,  H04N9/8222 ,  H04N9/8255

    摘要： In an apparatus for recording, in successive parallel tracks on a record medium, an audio signal and a color video signal comprised of a luminance signal and a chrominance signal constituted by at least two chrominance signal components, and in which the luminance and chrominance signals are recorded in alternate tracks, respectively, with the chrominance signal components being time-base-compressed and time-division-multiplexed so as to be arranged alternately in sequence in the respective tracks; the audio signal frequency modulates at least one carrier to provide a first frequency modulated output in a predetermined frequency band, the time-base-compressed and time-division-multiplexed chrominance signal components frequency modulate a second carrier to provide a second frequency modulated output in a frequency band above the predetermined frequency band of the first frequency modulated output, the first and second frequency modulated outputs are combined, as in an adder or mixer, the luminance signal is processed, for example, in a frequency modulator, and then supplied to first recording heads for recording in the respective ones of the alternate tracks, and second recording heads receive the combined first and second frequency modulated outputs for recording in the others of the alternate tracks.

    摘要翻译： 在用于记录的设备中，在记录介质上的连续平行轨道中，包括由至少两个色度信号分量构成的亮度信号和色度信号组成的音频信号和彩色视频信号，其中亮度和色度信号是 记录在交替轨道中，其中色度信号分量被时基压缩和时分复用，以便在各个磁道中依次交替排列; 音频信号频率调制至少一个载波以提供预定频带中的第一频率调制输出，时基压缩和时分复用色度信号分量对第二载波进行频率调制以提供第二频率调制输出 在第一频率调制输出的预定频带之上的频带，第一和第二频率调制输出被组合，如在加法器或混频器中，亮度信号例如在频率调制器中被处理，然后提供给 第一记录头用于在相应的备用轨道中记录，并且第二记录头接收组合的第一和第二频率调制输出，用于在其他备用轨道中进行记录。

    Recording/reproduction system with a fine picture quality for a helical scan-type video tape recorder
    42.
    发明授权
    Recording/reproduction system with a fine picture quality for a helical scan-type video tape recorder 失效
    用于螺旋扫描型录像机的具有精细图像质量的记录/再现系统

    公开(公告)号：US4743978A

    公开(公告)日：1988-05-10

    申请号：US939886

    申请日：1986-12-09

    申请人： Shigeo Tanaka

    发明人： Shigeo Tanaka

    IPC分类号： G11B5/008 ,  G11B5/027 ,  G11B5/53 ,  G11B15/12 ,  H04N5/7826 ,  H04N9/79 ,  H04N9/82 ,  H04N9/825 ,  H04N9/80 ,  G11B5/02 ,  H04N5/782

    CPC分类号： H04N9/8222 ,  G11B15/125 ,  G11B5/534 ,  H04N5/78263 ,  H04N9/7921 ,  H04N9/8255

    摘要： In the video tape recorder capable of providing a recording and reproduction with high picture quality, first and second heads of a first azimuth angle and for recording and reproducing the luminance signal is disposed on the rotary head cylinder. Third and fourth heads of a second azimuth angle different from the first azimuth angle, and for recording and reproducing the color signal is disposed adjacent to the first and second heads on the rotatry head cylinder, respectively. The second and fourth heads are disposed at a position separate, by a distance corresponding to the period of integer times one horizontal scanning period of the recorded video signal, from the position on the rotary head cylinder rotated 180.degree. from that of the first and third heads, respectively. A fifth head with the second azimuth angle is disposed at a positon rotated 180.degree. from that of the first head. High image quality recording and reproduction can be performed by using the first to fourth heads. The first and fifth heads reproduces the video information as recorded on the video tape in the format which is employed for the current home use VTR, and in which the frequency-modulated luminance signal and the low-frequency converted color sub-carrier signal are superposed and recorded in one track.

    摘要翻译： 在能够提供具有高图像质量的记录和再现的录像机中，具有第一方位角的第一和第二头以及用于记录和再现亮度信号的磁带录像机设置在旋转磁头气缸上。 与第一方位角不同的第二方位角的第三和第四头以及用于记录和再现彩色信号的第三和第四头分别设置在旋转头圆柱体上的第一和第二头附近。 第二和第四磁头设置在与从第一和第三磁头旋转180°的旋转磁头气缸上的位置分开的距离，该位置与记录的视频信号的一个水平扫描周期的整数倍的周期相对应 头，分别。 具有第二方位角的第五头设置在与第一头旋转180度的位置处。 可以通过使用第一至第四头来执行高图像质量的记录和再现。 第一和第五磁头以用于当前家用VTR的格式再现记录在磁带上的视频信息，并且其中调频亮度信号和低频转换颜色副载波信号被叠加 并记录在一个轨道上。

    Method and apparatus for recording and/or reproducing color video signal
    43.
    发明授权
    Method and apparatus for recording and/or reproducing color video signal 失效
    用于记录和/或再现彩色视频信号的方法和装置

    公开(公告)号：US4647983A

    公开(公告)日：1987-03-03

    申请号：US655377

    申请日：1984-09-28

    申请人： Yoshihiko Ota

    发明人： Yoshihiko Ota

    IPC分类号： H04N5/7826 ,  H04N9/79 ,  H04N9/793 ,  H04N9/797 ,  H04N9/82 ,  H04N9/825 ,  H04N9/835 ,  H04N9/893 ,  H04N9/493

    CPC分类号： H04N9/7973 ,  H04N5/78263 ,  H04N9/7912 ,  H04N9/793 ,  H04N9/8222 ,  H04N9/825 ,  H04N9/835 ,  H04N9/893

    摘要： A method of recording and/or reproducing color video signal comprises the steps of forming from a color video signal a frequency division multiplexed signal of an FM luminance signal and a frequency converted carrier chrominance signal, recording the frequency division multiplexed signal on a first track on a magnetic tape by one of two heads constituting a pair, forming a high-frequency signal at least including an added signal made up of a high-frequency component of the color video signal and a high-frequency bias signal, recording the high-frequency signal on a second track by the other of the two heads simultaneously as the recording of the first track, demodulating at least a reproduced luminance signal from a signal reproduced from the first track, obtaining at least a high-frequency component of a luminance signal from a signal reproduced from the second track, and mixing the reproduced luminance signal, the high-frequency component of the luminance signal, and a reproduced carrier chrominance signal reproduced from the reproduced frequency division multiplexed signal, or a reproduced carrier chrominance signal separated from the reproduced high-frequency signal. A recording and reproducing apparatus performs recording and reproduction according to the above method.

    摘要翻译： 一种记录和/或再现彩色视频信号的方法包括以下步骤：从彩色视频信号形成FM亮度信号的频分多路复用信号和频率转换载波色度信号，将频分复用信号记录在第一磁道上 构成一对的两个头之一的磁带，形成至少包括由彩色视频信号的高频分量组成的相加信号和高频偏置信号的高频信号，记录高频信号 在第二轨道上由另一个磁头同时作为第一磁道的记录信号，从至少从第一磁道再现的信号中解调出再现的亮度信号，至少从亮度信号的高频分量获得亮度信号的高频分量 从第二轨道再现的信号，并且将再现的亮度信号，亮度信号的高频分量和再现的轿厢混合 从再现的频分多路复用信号再现的信号色差信号，或从再现的高频信号分离的再现的载波色度信号。 记录和再现装置根据上述方法执行记录和再现。

    Circuit for reducing intermodulation distortion in a frequency-modulated signal
    44.
    发明授权
    Circuit for reducing intermodulation distortion in a frequency-modulated signal 失效
    用于减少调频信号中的互调失真的电路

    公开(公告)号：US4577238A

    公开(公告)日：1986-03-18

    申请号：US487686

    申请日：1983-04-22

    申请人： Yasuaki Watanabe

    发明人： Yasuaki Watanabe

    IPC分类号： H03C3/00 ,  G11B9/06 ,  G11B20/06 ,  G11B20/22 ,  H03C3/09 ,  H04N5/93 ,  H04N9/79 ,  H04N9/802 ,  H04N9/82 ,  H04N9/85 ,  H04N5/91 ,  H03B1/00 ,  H03B19/00 ,  H04B1/10 ,  H04N5/213

    CPC分类号： H04N9/85 ,  H04N9/7912 ,  H04N9/8222

    摘要： An intermodulation distortion reducing circuit for a frequency-modulated signal comprises a sinusoidal wave shaping circuit supplied with an input frequency-modulated signal including an intermodulation distortion component, for shaping the waveform of the input frequency-modulated signal into a waveform closely approximating a sinusoidal wave, and a mean DC level detecting circuit supplied with an output signal of the sinusoidal wave shaping circuit, for detecting a mean DC level of the output signal of the sinusoidal wave shaping circuit and producing a detection output. The sinusoidal wave shaping circuit is supplied with the detection output of the mean DC level detecting circuit and a waveform shaping quantity thereof is varied to obtain the waveform closely approximating the sinusoidal waveform. The sinusoidal wave shaping circuit produces a frequency-modulated signal having a waveform closely approximating a sinusoidal waveform, with its intermodulation distortion component reduced.

    摘要翻译： 用于调频信号的互调失真减少电路包括正弦波整形电路，其被提供有包括互调失真分量的输入频率调制信号，用于将输入调频信号的波形整形为近似正弦波的波形 以及平均DC电平检测电路，其被提供有正弦波整形电路的输出信号，用于检测正弦波整形电路的输出信号的平均DC电平并产生检测输出。 正弦波整形电路被提供有平均DC电平检测电路的检测输出，并且其波形整形量被改变以获得接近于正弦波形的波形。 正弦波整形电路产生具有接近正弦波形的波形的调频信号，其互调失真分量减小。