公开(公告)号：US5771333A

公开(公告)日：1998-06-23

申请号：US705004

申请日：1996-08-29

Applicant: Ryo Hirayama ,  Kaoru Kobayashi

Inventor： Ryo Hirayama ,  Kaoru Kobayashi

IPC: H04N5/783 ,  H04N5/923 ,  H04N5/937 ,  H04N9/793 ,  H04N9/81

CPC classification number: H04N9/7936 ,  H04N5/923 ,  H04N5/937 ,  H04N9/81 ,  H04N5/783

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5267022A

公开(公告)日：1993-11-30

申请号：US789753

申请日：1991-11-08

Applicant: Etsurou Sakamoto ,  Masatoshi Takashima

Inventor： Etsurou Sakamoto ,  Masatoshi Takashima

IPC: H04N5/7826 ,  H04N5/928 ,  H04N7/015 ,  H04N9/793 ,  H04N9/797 ,  H04N9/81 ,  H04N9/815 ,  H04N11/06 ,  H04N5/213 ,  H04N7/04

CPC classification number: H04N9/81 ,  H04N5/78266 ,  H04N5/928 ,  H04N9/7936 ,  H04N9/7973

Abstract: A video signal processing apparatus, typically for use as a video tape recorder/reproducer for recording and reproducing high-definition television signals, includes an encoder for converting a chrominance signal into a line sequential signal, time-compressing the line sequential signal and multiplexing the time-compressed line sequential signal with a luminance signal according to time-division multiplexing, thereby producing a time-division-multiplexed signal. A vertical emphasis circuit is connected to an input terminal of the encoder, for performing vertical nonlinear emphasis on the chrominance signal. The video signal processing apparatus also includes a vertical low-pass filter for preventing aliasing distortions from the chrominance signal due to the conversion of the chrominance signal into the line sequential signal. The vertical nonlinear emphasis is performed on the chrominance signal after the chrominance signal has been processed by the vertical low-pass filter.

公开(公告)号：US5526136A

公开(公告)日：1996-06-11

申请号：US170030

申请日：1993-12-20

Applicant: Hirofumi Hisikura ,  Ryo Hirayama ,  Kaoru Kobayashi

Inventor： Hirofumi Hisikura ,  Ryo Hirayama ,  Kaoru Kobayashi

IPC: H04N5/783 ,  H04N5/923 ,  H04N5/937 ,  H04N9/793 ,  H04N9/81 ,  H04N5/76 ,  H04N5/213 ,  H04N5/78

CPC classification number: H04N9/7936 ,  H04N5/923 ,  H04N5/937 ,  H04N9/81 ,  H04N5/783

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5144434A

公开(公告)日：1992-09-01

申请号：US550284

申请日：1990-07-09

Applicant: Shinichi Yamashita ,  Mitsugu Tanaka

Inventor： Shinichi Yamashita ,  Mitsugu Tanaka

IPC: H04N9/793 ,  H04N9/825

CPC classification number: H04N9/825 ,  H04N9/7936

Abstract: A video signal processing device is arranged to supply a digital video signal to an infinite impulse response digital filter, to supply the digital video signal from the filter to a look-up table circuit which has a non-linear input-output characteristic, and to emphasize a high-frequency component of the digital video signal by adding the output signal of the look-up table circuit to the digital video signal supplied to the filter, so that a non-linearly emphasizing process can be accomplished at a high speed on the digital video signal. Further, in the video signal processing device, a look-up table circuit is arranged to look up a table by using as an address the output signal of a first subtractor which receives a high-frequency-component-emphasized digital video signal as one of its inputs and to have a non-linear input-output characteristic, the output signal of the look-up table circuit is subtracted from the high-frequency-component-emphasized digital video signal to obtain a high-frequency-component-suppressed digital video signal, the video signal thus obtained is supplied to an infinite impulse response digital filter, and the output signal of the filter is supplied to the first subtracter as its other input, so that the digital video signal can be non-linearly deemphasized at a high speed.

公开(公告)号：US4626927A

公开(公告)日：1986-12-02

申请号：US634407

申请日：1984-07-25

Applicant: Akira Hirota ,  Takuya Tsushima ,  Nobuyoshi Suzuki

Inventor： Akira Hirota ,  Takuya Tsushima ,  Nobuyoshi Suzuki

IPC: H04N9/80 ,  H04N9/793 ,  H04N9/82 ,  H04N5/76 ,  H04N9/493

CPC classification number: H04N9/7936

Abstract: A recording and reproducing apparatus for recording a carrier chrominance signal, comprises a separating circuit for separating a carrier chrominance signal from a color video signal, a recording signal processing circuit for converting the carrier chrominance signal into a carrier chrominance signal having a signal format suited for recording and reproduction, a recording circuit for recording an output signal of the recording signal processing circuit on a recording medium, a reproducing circuit for reproducing the recorded signal from the recording medium, a reproduced signal processing circuit for converting the reproduced signal from the reproducing circuit into a reproduced carrier chrominance signal having an original signal format, and a de-emphasis circuit responsive to the reproduced carrier chrominance signal from the reproduced signal processing circuit, for subjecting the reproduced carrier chrominance signal to a de-emphasis so that a high-frequency component in a vertical spatial frequency of the reproduced carrier chrominance signal is relatively attenuated compared to a low-frequency component of the reproduced carrier chrominance signal.

Abstract translation: 一种用于记录载波色度信号的记录和再现装置，包括用于从彩色视频信号中分离载波色度信号的分离电路，用于将载波色度信号转换成具有适合于信号格式的信号格式的载波色度信号的记录信号处理电路 记录和再现，用于将记录信号处理电路的输出信号记录在记录介质上的记录电路，用于从记录介质再现记录信号的再现电路，用于转换来自再现电路的再现信号的再现信号处理电路 转换为具有原始信号格式的再现载波色度信号，以及响应于来自再现信号处理电路的再现的载波色度信号的去加重电路，用于对再现的载波色度信号进行去加重，使得高频 组合在一个vertica 与再现的载波色度信号的低频分量相比，再现的载波色度信号的空间频率相对衰减。

公开(公告)号：US5848221A

公开(公告)日：1998-12-08

申请号：US738587

申请日：1996-10-29

Applicant: Koji Suzuki

Inventor： Koji Suzuki

IPC: G11B27/032 ,  G11B27/30 ,  G11B27/32 ,  H04N5/7826 ,  H04N9/79 ,  H04N9/793 ,  H04N9/797 ,  H04N9/87 ,  H04N5/926 ,  H04N5/91 ,  H04N11/24

CPC classification number: H04N9/87 ,  G11B27/032 ,  G11B27/3027 ,  G11B27/3054 ,  G11B27/324 ,  H04N5/78263 ,  H04N9/7904 ,  H04N9/7936 ,  H04N9/7973 ,  G11B2220/90 ,  G11B2220/91

Abstract: A video signal recording apparatus includes a first device for processing a first time segment of a video signal in response to a second time segment of the video signal. The first time segment relates to a first frame or field while the second time segment relates to a second frame or field which precedes the first frame or field. A second device is operative for interrupting the processing by the first device when the video signal starts to be subjected to an editing process. A third device is operative for recording an editing information signal and an output signal of the first device on a recording medium. The editing information signal represents a time of occurrence of the editing process.

Abstract translation: 视频信号记录装置包括响应于视频信号的第二时间段来处理视频信号的第一时间段的第一装置。 第一时间段涉及第一帧或场，而第二时间段涉及在第一帧或场之前的第二帧或场。 当视频信号开始进行编辑处理时，第二装置用于中断第一装置的处理。 第三装置用于在记录介质上记录第一装置的编辑信息信号和输出信号。 编辑信息信号表示编辑处理的发生时间。

公开(公告)号：US5598273A

公开(公告)日：1997-01-28

申请号：US519014

申请日：1995-08-24

Applicant: Kazuhiro Kurisaki ,  Yoshikazu Kanazawa ,  Yoshiaki Mimura

Inventor： Kazuhiro Kurisaki ,  Yoshikazu Kanazawa ,  Yoshiaki Mimura

IPC: G11B5/035 ,  G11B27/36 ,  H04N9/793 ,  H04N9/83 ,  H04N5/782

CPC classification number: H04N9/83 ,  G11B27/36 ,  G11B5/035 ,  H04N9/7936

Abstract: In a magnetic recording control device, a plurality of test signals of different frequencies are recorded on and reproduced from a magnetic recording medium, and the reproduction levels of the test signals are detected. From the detection results, the frequency characteristics and electro-magnetic conversion characteristics of the magnetic recording medium are judged. A frequency correction in accordance with the judged frequency characteristics, and a record level correction in accordance with the judged electro-magnetic conversion characteristics are conducted on a video signal to be recorded.

Abstract translation: 在磁记录控制装置中，将不同频率的多个测试信号记录在磁记录介质上并从磁记录介质再现，并且检测测试信号的再现电平。 根据检测结果，判断磁记录介质的频率特性和电磁转换特性。 对要记录的视频信号进行根据所判断的频率特性的频率校正和根据所判断的电磁转换特性的记录电平校正。

公开(公告)号：US4556917A

公开(公告)日：1985-12-03

申请号：US466479

申请日：1983-02-15

Applicant: Akira Shibata ,  Keiichi Komatsu

Inventor： Akira Shibata ,  Keiichi Komatsu

IPC: G11B20/00 ,  G11B5/027 ,  H04N5/923 ,  H04N9/79 ,  H04N9/793 ,  H04N9/802 ,  H04N9/82 ,  H04N9/83 ,  H04N9/835 ,  H04N5/78

CPC classification number: H04N9/8355 ,  H04N5/923 ,  H04N9/7933 ,  H04N9/7936

Abstract: Disclosed is a magnetic recording/reproducing apparatus, in which a luminance signal and a carrier chrominance signal are separated from a composite color video signal, a luminance carrier signal is frequency-modulated with the luminance signal, a frequency of a subcarrier signal of the carrier chrominance signal is frequency-converted into a low band frequency so as to dispose the carrier chrominance signal in the frequency band lower than the lower side band of the luminance signal, a sound carrier signal is frequency-modulated with an aural signal, the aural signal is disposed in the frequency band between the luminance signal and the carrier chrominance signal, and the video signal and the aural signal are frequency-multiplexed and recorded. A comb line filter is inserted in a recording luminance signal processing circuit for separating the luminance signal from the composite color video signal and for processing the luminance signal.

Abstract translation: 公开了一种磁记录/再现装置，其中亮度信号和载波色度信号与复合彩色视频信号分离，亮度载波信号用亮度信号进行频率调制，载波的子载波信号的频率 色度信号被频率转换为低频带频率，以将载波色度信号置于低于亮度信号的下侧频带的频带中，声音载波信号用听觉信号进行频率调制，听觉信号 被布置在亮度信号和载波色度信号之间的频带中，并且视频信号和听觉信号被频率复用和记录。 梳状滤波器插入记录亮度信号处理电路中，用于从合成彩色视频信号中分离出亮度信号并处理亮度信号。

公开(公告)号：US4719518A

公开(公告)日：1988-01-12

申请号：US899545

申请日：1986-08-22

Applicant: Koichi Kido ,  Kenji Shibayama ,  Masahiko Tsuruta ,  Akira Hirota ,  Masato Mihara ,  Osamu Inoue

Inventor： Koichi Kido ,  Kenji Shibayama ,  Masahiko Tsuruta ,  Akira Hirota ,  Masato Mihara ,  Osamu Inoue

IPC: H04N5/782 ,  H04N5/7826 ,  H04N9/79 ,  H04N9/793 ,  H04N9/802 ,  H04N9/82 ,  H04N9/825 ,  H04N9/835 ,  H04N9/86 ,  H04N

CPC classification number: H04N5/78263 ,  H04N5/78213 ,  H04N9/7921 ,  H04N9/7936 ,  H04N9/802 ,  H04N9/8222 ,  H04N9/8255 ,  H04N9/835 ,  H04N9/86

Abstract: A magnetic recording apparatus for carrying out a recording by selectively using one of two kinds of recording systems comprises first through fourth rotary magnetic heads, a first circuit for producing an FM luminance signal, second and third circuits for producing first and second frequency division multiplexed signals, and a switching circuit. The first and second heads are mounted on a rotary body at mutually opposing positions, and have the same height position. The third and fourth heads are mounted on the rotary body at mutually opposing positions respectively in vicinities of the first and second heads along a rotating direction of the rotary body, and have the same height position. The switching circuit selectively supplies the output signals of the first and second circuits to the first through fourth heads when a luminance/color separation recording system is selected as the recording system, and selectively supplies the output signal of the third circuit to the first and second heads or to the third and fourth heads when a low band conversion color recording system is selected as the recording system.

Abstract translation: 通过选择性地使用两种记录系统中的一种进行记录的磁记录装置包括第一至第四旋转磁头，用于产生FM亮度信号的第一电路，用于产生第一和第二频分复用信号的第二和第三电路 ，以及开关电路。 第一和第二头部在彼此相对的位置处安装在旋转体上，具有相同的高度位置。 第三和第四头部沿着旋转体的旋转方向分别在第一和第二头部附近相互相对的位置处安装在旋转体上，并且具有相同的高度位置。 当选择亮度/颜色分离记录系统作为记录系统时，切换电路选择性地将第一和第二电路的输出信号提供给第一至第四磁头，并且选择性地将第三电路的输出信号提供给第一和第二磁头 当选择低频转换彩色记录系统作为记录系统时，磁头或者到第三和第四磁头。

公开(公告)号：US4668988A

公开(公告)日：1987-05-26

申请号：US665417

申请日：1984-10-25

Applicant: Takayuki Sasaki ,  Masaaki Arai

Inventor： Takayuki Sasaki ,  Masaaki Arai

IPC: H04B1/62 ,  G11B20/02 ,  G11B20/24 ,  H04B14/04 ,  H04N5/14 ,  H04N5/92 ,  H04N5/923 ,  H04N9/79 ,  H04N9/793 ,  H04N9/86

CPC classification number: H04N9/7936 ,  H04N5/14 ,  H04N5/923 ,  H04N9/7904 ,  H04N9/86

Abstract: A non-linear digital emphasis circuit for non-linearly emphasizing a high frequency component of an input digital video signal in accordance with an amplitude of the digital video signal. This emphasis circuit comprises: a digital filter for emphasizing the high frequency component of the digital video signal; and a memory in which a data conversion table to non-linearly compress the amplitude of the digital video signal is written and to which the digital video signal is supplied as an address input. The respective polarities of the address input of the memory and of the readout output therefrom are inverted by a polarity inverter in accordance with the polarity of the digital video signal. With this emphasis circuit, an error of the frequency characteristic and time and temperature changes thereof are not caused and no adjustment of the characteristic is needed. Also, this circuit can be formed as an integrated circuit by utilizing only digital circuits.

Abstract translation: 一种非线性数字加重电路，用于根据数字视频信号的幅度非线性地强调输入数字视频信号的高频分量。 该强调电路包括：数字滤波器，用于强调数字视频信号的高频分量; 并且写入其中非线性压缩数字视频信号的幅度的数据转换表被写入并且数字视频信号被提供给其的地址输入的存储器。 根据数字视频信号的极性，通过极性反相器将存储器的地址输入和读出输出的相应极性反转。 利用该强调电路，不会引起频率特性及其时间和温度变化的误差，并且不需要调整特性。 此外，该电路可以仅通过利用数字电路形成为集成电路。