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    • 3. 发明授权
    • Chroma signal recording and reproducing circuit
    • 色度信号记录和再现电路
    • US4524380A
    • 1985-06-18
    • US447387
    • 1982-12-07
    • Akira ShibataKeiichi KomatsuTomomitsu KuroyanagiNoboru Kojima
    • Akira ShibataKeiichi KomatsuTomomitsu KuroyanagiNoboru Kojima
    • H04N5/923H04N9/79H04N9/793H04N9/83H04N9/84H04N9/898H04N9/491
    • H04N5/923H04N9/7933H04N9/7936H04N9/83H04N9/84H04N9/898
    • A chroma signal recording and reproducing circuit of a magnetic recording and reproducing apparatus having a recording circuit for frequency-modulating a luminance signal of a color video signal, low-frequency converting a chroma signal and frequency-multiplexing those signals for recording and a reproducing circuit for frequency-converting the low-frequency converted chroma signal in a reproduced signal and frequency-demodulating the FM luminance signal to reproduce a color video signal is disclosed. The circuit comprises a chroma signal recording circuit including a first ACC circuit and a first frequency converter connected to the first ACC circuit, and a chroma signal reproducing circuit including a second ACC circuit, a second frequency converter connected to the second ACC circuit, a comb filter connected to the second frequency converter and a deemphasis circuit connected to the output of the comb filter.
    • 具有用于对彩色视频信号的亮度信号进行频率调制的记录电路,对色度信号进行低频转换和频率复用这些用于记录的信号的磁记录和再现装置的色度信号记录和再现电路以及再生电路 用于对再现信号中的低频转换色度信号进行频率转换,并对FM亮度信号进行频率解调以再现彩色视频信号。 该电路包括色度信号记录电路,该色度信号记录电路包括连接到第一ACC电路的第一ACC电路和第一变频器,以及包括第二ACC电路的色度信号再现电路,连接到第二ACC电路的第二变频器,梳子 连接到第二变频器的滤波器和连接到梳状滤波器的输出的去加重电路。
    • 4. 发明授权
    • Color video signal recording apparatus
    • 彩色视频信号记录装置
    • US4554596A
    • 1985-11-19
    • US438246
    • 1982-11-01
    • Akira ShibataNoboru KojimaTomomitsu Kuroyanagi
    • Akira ShibataNoboru KojimaTomomitsu Kuroyanagi
    • H04N9/84H04N9/493
    • H04N9/84
    • Disclosed is a color video signal recording apparatus wherein the chrominance signal and the luminance signal are separated from the composite color video signal, the luminance signal is transformed into a frequency modulation signal and the chrominance signal is converted to have a lower frequency so that both reformed signals are recorded on a frequency multiplex basis on a recording medium. In processing a TV signal of CCIR system, the chrominance signal is controlled to have a frequency of 3/8 N.multidot.f.sub.H (where N is an odd number) and have its phase shifted by 90.degree. in every horizontal scanning period; in processing a TV signal of NTSC system, the chrominance signal is controlled to have a frequency of 3/8 N.multidot.f.sub.H (where N is an integer) and have its phase shifted by 90.degree. or 180.degree. in every horizontal scanning period, while the control being made such that 1/4 N is an integer in case of 90.degree. phase shift of (3N-2)/4 is an integer in case of 180.degree. phase shift.
    • 公开了一种彩色视频信号记录装置,其中色度信号和亮度信号与复合彩色视频信号分离,将亮度信号变换为频率调制信号,并将色度信号转换为具有较低的频率,使得重整 信号在记录介质上以频率多路复用为基础记录。 在处理CCIR系统的TV信号时,色度信号被控制为具有3/8 N×fH(N为奇数)的频率,并且在每个水平扫描周期中相位偏移90°; 在处理NTSC系统的TV信号时,色度信号被控制为具有3/8 N×fH(其中N是整数)的频率,并且在每个水平扫描周期中其相位偏移90°或180°,而控制 使得在180°相移的情况下,(3N-2)/ 4的90°相移的情况下,1/4 N是整数。
    • 5. 发明授权
    • Video signal recording/reproducing apparatus
    • 视频信号记录/再现装置
    • US4630132A
    • 1986-12-16
    • US559086
    • 1983-12-07
    • Toshimichi TeradaNoboru KojimaAkira Shibata
    • Toshimichi TeradaNoboru KojimaAkira Shibata
    • H04N5/7826H04N9/82H04N9/825H04N9/493H04N5/78
    • H04N9/8255H04N5/78263H04N9/8205H04N9/8216H04N9/825
    • A helical scan type magnetic recording/reproducing apparatus in which a magnetic tape is guided helically around a rotary magnetic head assembly over an angular range approximating to 360.degree.. Two magnetic heads are disposed relatively closely to each other at an angle smaller than 180.degree.. The rotary magnetic heads assembly performs a single complete rotation for a unit period, for example, one field period. In recording, video signal of the unit period undergoes time axis compression to be compressed to a period corresponding to a scanning period of the heads during which the magnetic heads are in contact with the magnetic tape in each rotation of the head assembly and supplied to alternately the magnetic heads which are so designed that the azimuth angles of the respective gaps differ from each other. Alternatively, the video signal is separated into a luminance signal and a chrominance signal, wherein the former is supplied to one of the magnetic heads while the latter is simultaneously supplied to the other.
    • 一种螺旋扫描型磁记录/再现装置,其中磁带在近似于360度的角度范围内螺旋地绕旋转磁头组件被引导。 两个磁头以小于180°的角度彼此相对靠近地设置。 旋转磁头组件在单个周期内执行单个完整旋转,例如,一个场周期。 在记录中,单位周期的视频信号经历时间轴压缩,以被压缩到对应于在头部组件的每次旋转期间磁头与磁带接触的磁头的扫描周期的时间段,并交替提供 磁头被设计成使得各间隙的方​​位角彼此不同。 或者,视频信号被分成亮度信号和色度信号,其中前者被提供给一个磁头,而后者则被提供给另一个。
    • 8. 发明授权
    • Television signal recording/reproducing apparatus of color-under
recording type
    • 彩色录像类型的电视信号记录/重放装置
    • US5016111A
    • 1991-05-14
    • US271310
    • 1988-11-15
    • Toshiyuki SakamotoNoboru KojimaIsao Nakagawa
    • Toshiyuki SakamotoNoboru KojimaIsao Nakagawa
    • H04N9/78H04N9/79H04N9/83H04N9/84H04N9/87
    • H04N9/7908H04N9/7904H04N9/83H04N9/831
    • A television signal recording/reproducing apparatus of the color-under recording type wherein an input composite video signal is separated into a luminance signal and a color signal. For the separated luminance signal, calculation of the interframe signals is executed so that the color signal component remaining in the separated luminance signal is removed by a frame comb filter. And the input signal and the output signal of the frame comb filter are mixed with each other. For the separated color signal, calculation of the interframe signals is executed so that the luminance signal component remaining in the separated color signal is removed by a frame comb filter. And the input signal and the output signal of the frame comb filter are mixed with each other. Each of the signal mixing ratios is controlled in accordance with the interframe level difference in the luminance signal. And the mixed signals are recorded on a recording medium after predetermined recording processes. Mutual interference between the luminance signal and the color signal is eliminated to consequently prevent deterioration of the signal-to-noise ratio while achieving a high image quality.
    • 一种彩色录像类型的电视信号记录/重放装置,其中输入的复合视频信号被分成亮度信号和彩色信号。 对于分离的亮度信号,执行帧间信号的计算,使得残留在分离的亮度信号中的彩色信号分量被帧梳状滤波器去除。 并且帧梳状滤波器的输入信号和输出信号彼此混合。 对于分离的彩色信号,执行帧间信号的计算,使得残留在分离的彩色信号中的亮度信号分量被帧梳状滤波器去除。 并且帧梳状滤波器的输入信号和输出信号彼此混合。 根据亮度信号中的帧间电平差来控制每个信号混合比。 并且在预定的记录处理之后,混合信号被记录在记录介质上。 消除亮度信号和彩色信号之间的相互干扰,从而防止信号噪声的降低,同时实现高图像质量。