公开(公告)号：US4647960A

公开(公告)日：1987-03-03

申请号：US777288

申请日：1985-09-18

申请人： Kuniaki Miura ,  Yasufumi Yunde ,  Kazunori Kotani ,  Isao Fukushima ,  Kenji Kano

发明人： Kuniaki Miura ,  Yasufumi Yunde ,  Kazunori Kotani ,  Isao Fukushima ,  Kenji Kano

IPC分类号： H04N5/21 ,  H03G7/00 ,  H04N5/14 ,  H04N5/205 ,  H04N5/922 ,  H04N5/923 ,  H04N9/64 ,  H04N5/208

CPC分类号： H04N5/142 ,  H04N5/923 ,  H04N9/646

摘要： Disclosed is a circuit for emphasizing a video signal in the vertical direction of a television picture for minimizing noise appearing during reproduction. In the circuit, a signal obtained by delaying an input video signal by one horizontal scanning period is positively fed back through a feedback circuit to the input of the input video signal. An amplitude difference signal between the video signal after being fed back through a positive feedback loop and the delayed video signal is produced and added to the input video signal to provide an output video signal.

摘要翻译： 公开了一种用于在电视图像的垂直方向上强调视频信号以减少再现期间出现噪声的电路。 在该电路中，通过将输入视频信号延迟一个水平扫描周期而获得的信号通过反馈电路被反馈到输入视频信号的输入。 产生通过正反馈回路反馈的视频信号与延迟视频信号之间的振幅差信号，并将其相加到输入视频信号以提供输出视频信号。

公开(公告)号：US4758903A

公开(公告)日：1988-07-19

申请号：US800147

申请日：1985-11-20

申请人： Takaharu Noguchi ,  Hiroyuki Kimura ,  Masaharu Kobayashi ,  Yasufumi Yunde ,  Takao Arai ,  Nobutaka Amada ,  Kuniaki Miura

发明人： Takaharu Noguchi ,  Hiroyuki Kimura ,  Masaharu Kobayashi ,  Yasufumi Yunde ,  Takao Arai ,  Nobutaka Amada ,  Kuniaki Miura

IPC分类号： H04N5/782 ,  H04N9/793 ,  H04N9/802 ,  H04N9/82 ,  H04N9/835

CPC分类号： H04N9/802 ,  H04N5/78213 ,  H04N9/7933 ,  H04N9/8233 ,  H04N9/8355

摘要： In a recording and reproducing apparatus wherein a video signal and an audio signal are recorded on the same recording track, a signal subjected to a quadrature differential PSK modulation with PCM audio signal is generated as an audio recording signal. The audio recording signal is disposed between occupied bands of FM luminance signal and down converted chrominance signal in a video recording signal and also recorded on a track where the video recording signal is to be recorded.

摘要翻译： 在其中将视频信号和音频信号记录在同一记录磁道上的记录和再现装置中，产生经PCM音频信号的正交差分PSK调制的信号作为音频记录信号。 音频记录信号被布置在视频记录信号中的FM亮度信号的被占用频带和下变频色度信号之间，并且还记录在要记录视频记录信号的磁道上。

公开(公告)号：US4825299A

公开(公告)日：1989-04-25

申请号：US91452

申请日：1987-08-31

申请人： Yoshinori Okada ,  Shigemitsu Higuchi ,  Hiroaki Takahashi ,  Yasufumi Yunde ,  Takashi Furuhata

发明人： Yoshinori Okada ,  Shigemitsu Higuchi ,  Hiroaki Takahashi ,  Yasufumi Yunde ,  Takashi Furuhata

IPC分类号： H04N9/83 ,  H04N9/89 ,  H04N9/896

CPC分类号： H04N9/896 ,  H04N9/89

摘要： A magnetic video recording/reproducing apparatus of high resolution, which excludes a phase difference introduced to a signal due to difference in characteristics between a low frequency conversion system and a high frequency conversion system by inserting an additonal signal to both systems. The additional signal is recorded together with the video signal and a phase difference is detected. The detected phase difference is utilized for regulating the phase difference in the respective frequency systems.

摘要翻译： 一种高分辨率的磁视频记录/再现装置，其通过向两个系统插入附加信号，排除由于低频转换系统和高频转换系统之间的特性差异而引入信号的相位差。 附加信号与视频信号一起被记录，并且检测到相位差。 所检测的相位差用于调节相应频率系统中的相位差。