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1. 发明授权

US5771333A Video signal emphasis and deemphasis method and apparatus 失效
标题翻译：视频信号强调和去加重方法和设备
公开(公告)号：US5771333A
公开(公告)日：1998-06-23
申请号：US705004
申请日：1996-08-29
申请人： Ryo Hirayama , Kaoru Kobayashi
发明人： Ryo Hirayama , Kaoru Kobayashi
IPC分类号： H04N5/783 , H04N5/923 , H04N5/937 , H04N9/793 , H04N9/81
CPC分类号： H04N9/7936 , H04N5/923 , H04N5/937 , H04N9/81 , H04N5/783
摘要： An input video signal is applied to a transmission line first through a time direction emphasizer for emphasizing the levels of time direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secondary through a vertical direction emphasizer; and thirdly through a horizontal direction emphasizer. Further, the received video signal is outputted as an output video signal from the transmission line first through a horizontal direction deemphasizer for deemphasizing the levels of horizontal direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secondary through a vertical direction deemphasizer; and thirdly through a time direction deemphasizer. The emphasis and deemphasis method enables the dynamic range of the transmission line to be utilized effectively, while preventing erroneous operation on the reception side.
摘要翻译：输入视频信号首先通过时间方向增强器施加到传输线，用于相对于其低频分量的电平强调视频信号的时间方向高频分量的电平; 通过垂直方向强调器辅助; 第三次通过水平方向加强器。此外，接收的视频信号作为来自传输线的输出视频信号首先通过水平方向去加噪器输出，用于相对于其低频分量的电平去强调视频信号的水平方向高频分量的电平; 次要通过垂直方向去加重; 第三，通过时间方向去强调。强调和去加重方法能够有效地利用传输线的动态范围，同时防止接收侧的错误操作。

2. 发明授权

US5517322A Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes 失效
标题翻译：用于以预加重和去加重过程记录和再现视频信号的装置
公开(公告)号：US5517322A
公开(公告)日：1996-05-14
申请号：US415031
申请日：1995-04-03
申请人： Ryo Hirayama
发明人： Ryo Hirayama
IPC分类号： G11B15/087 , G11B27/032 , G11B27/036 , G11B27/30 , H04N5/92 , H04N5/923 , H04N5/76
CPC分类号： G11B15/087 , G11B27/032 , G11B27/036 , G11B27/3054 , H04N5/9206 , H04N5/923 , G11B2220/90 , H04N5/9201
摘要： A video signal recording and reproducing apparatus comprises a magnetic tape (4) into which video signals are recorded, A preemphasis circuit (35) modifies the video signals prior to the recording into the magnetic tape (4), so as to increase magnitude of high-frequency components with respect to magnitude of low-frequency components on time base. A record start or end ID signal is generated in response to a record start or end signal in an ID signal recording circuit (36) which memorizes this ID signal into a corresponding portion of the magnetic tape (4). A mute circuit (46) resets the preemphasis circuit (35) in response to the record start or end signal. There is further provided a deemphasis circuit (37) for modifying the video signals after reproducing from the magnetic tape (4) in a complementary manner with respect to the preemphasis circuit (35), so as to decrease magnitude of high-frequency components with respect to magnitude of low-frequency components on time base. An ID signal detecting circuit (38) detects the record start or end ID signal from the magnetic tape (4) and generates an ID detecting signal. A mute circuit (49) resets the deemphasis circuit (37) in response to the ID detecting signal.
摘要翻译：视频信号记录和再现装置包括一个记录视频信号的磁带（4），一个预加重电路（35）将记录前的视频信号修改成磁带（4），从而增加高频率分量相对于低频分量在时基上的大小。响应于将该ID信号存储到磁带（4）的相应部分的ID信号记录电路（36）中的记录开始或结束信号，生成记录开始或结束ID信号。静音电路（46）响应于记录开始或结束信号复位预加重电路（35）。还提供了一种去加重电路（37），用于在相对于预加重电路（35）以互补的方式从磁带（4）再现之后修改视频信号，以便降低高频分量的幅度以时基为基础的低频分量的大小。 ID信号检测电路（38）从磁带（4）检测记录开始或结束ID信号，并生成ID检测信号。静音电路（49）响应于ID检测信号复位去加重电路（37）。

3. 发明授权

US5671066A Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes 失效
标题翻译：用于以预加重和去加重过程记录和再现视频信号的装置
公开(公告)号：US5671066A
公开(公告)日：1997-09-23
申请号：US609037
申请日：1996-02-29
申请人： Ryo Hirayama
发明人： Ryo Hirayama
IPC分类号： G11B15/087 , G11B27/032 , G11B27/036 , G11B27/30 , H04N5/92 , H04N5/923 , H04N5/76
CPC分类号： G11B15/087 , G11B27/032 , G11B27/036 , G11B27/3054 , H04N5/9206 , H04N5/923 , G11B2220/90 , H04N5/9201
摘要： A video signal recording and reproducing apparatus comprises a magnetic tape (4) into which video signals are recorded. A preemphasis circuit (35) modifies the video signals prior to the recording into the magnetic tape (4), so as to increase magnitude of high-frequency components with respect to magnitude of low-frequency components on time base. A record start or end ID signal is generated in response to a record start or end signal in an ID signal recording circuit (36) which memorizes this ID signal into a corresponding portion of the magnetic tape (4). A mute circuit (46) resets the preemphasis circuit (35) in response to the record start or end signal. There is further provided a deemphasis circuit (37) for modifying the video signals after reproducing from the magnetic tape (4) in a complementary manner with respect to the preemphasis circuit (35), so as to decrease magnitude of high-frequency components with respect to magnitude of low-frequency components on time base. An ID signal detecting circuit (38) detects the record start or end ID signal from the magnetic tape (4) and generates an ID detecting signal. A mute circuit (49) resets the deemphasis circuit (37) in response to the ID detecting signal.
摘要翻译：视频信号记录和再现装置包括记录有视频信号的磁带（4）。预加重电路（35）在记录到磁带（4）之前修改视频信号，以便在时基上提高相对于低频分量幅度的高频分量的幅度。响应于将该ID信号存储到磁带（4）的相应部分的ID信号记录电路（36）中的记录开始或结束信号，生成记录开始或结束ID信号。静音电路（46）响应于记录开始或结束信号复位预加重电路（35）。还提供了一种去加重电路（37），用于在相对于预加重电路（35）以互补的方式从磁带（4）再现之后修改视频信号，以便降低高频分量的幅度以时基为基础的低频分量的大小。 ID信号检测电路（38）从磁带（4）检测记录开始或结束ID信号，并生成ID检测信号。静音电路（49）响应于ID检测信号复位去加重电路（37）。

4. 发明授权

US5526136A Method and apparatus for reproducing a video signal subject to pre-emphasis 失效
标题翻译：用于再现预加重的视频信号的方法和装置
公开(公告)号：US5526136A
公开(公告)日：1996-06-11
申请号：US170030
申请日：1993-12-20
申请人： Hirofumi Hisikura , Ryo Hirayama , Kaoru Kobayashi
发明人： Hirofumi Hisikura , Ryo Hirayama , Kaoru Kobayashi
IPC分类号： H04N5/783 , H04N5/923 , H04N5/937 , H04N9/793 , H04N9/81 , H04N5/76 , H04N5/213 , H04N5/78
CPC分类号： H04N9/7936 , H04N5/923 , H04N5/937 , H04N9/81 , H04N5/783
摘要： An image is stably reproduced in a special reproduction mode of still, frame advance or slow motion mode without residual image and/or blur. A video signal reproducing apparatus operates to alternately repeat the steps of interrupting a de-emphasizing process at a time at which the de-emphasis process for one video image signal period is completed, holding a content of a frame memory constituting the de-emphasis circuit without refreshing the content and performing a de-emphasis process based the content of the memory during a subsequent video image signal period.
摘要翻译：图像以静止，帧提前或慢动作模式的特殊再现模式被稳定再现，没有残留图像和/或模糊。视频信号再现装置操作以交替重复在一个视频信号周期的去加重处理完成时中断去加重处理的步骤，保持构成去加重电路的帧存储器的内容而不刷新内容并且在随后的视频图像信号周期期间基于存储器的内容执行去加重处理。

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