会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 23. 发明授权
    • Skip field color recording apparatus
    • 跳过场彩色记录装置
    • US4641202A
    • 1987-02-03
    • US646743
    • 1984-09-04
    • Yoshiyuki NakamuraTetsuro KatoNorio Ebihara
    • Yoshiyuki NakamuraTetsuro KatoNorio Ebihara
    • G11B20/02G11B5/027H04N5/91H04N5/915H04N5/93H04N9/87H04N9/873H04N9/491
    • H04N9/873H04N5/915
    • A video signal reproducing apparatus having a driving mechanism for driving a magnetic tape on which a video signal is recorded as succeeding video tracks and a transducing head device for reproducing the video signal from the succeeding video tracks mounted on a cylindrical drum around which the magnetic tape is wrapped, the transducing head device having a bimorph plate and a transducing head mounted thereon is disclosed. The apparatus includes a field memory for memorizing one field and two field previous video signals of the reproduced video signal, a comparator for comparing a field identification signal of a reference signal with that of the reproduced video signal, a selector for selectively deriving one of the one field and two field previous video signals in response to an output signal of the comparator, and adding circuit for adding at least two succeeding horizontal line signals of the reproduced video signal and for generating an averaging video signal, a detector for detecting the movement of the reproduced video signal in response to the reproduced video signal and the output signal of the memory, a weighting circuit for generating a weighting signal corresponding to the output signal of the detector, a circuit for weighting the output signals of the adding circuit and the driving circuit in response to the weighting signal and a circuit for combining the weighted output with the averaging video signal.
    • 一种视频信号再现装置,具有用于驱动其上记录有视频信号的磁带作为后续视频磁道的驱动机构,以及用于从安装在圆柱形磁鼓上的后续视频磁道再现视频信号的转换头装置, 公开了具有双压电晶片板和安装在其上的换能头的转换头装置。 该装置包括用于存储再现的视频信号的一个场和两个场先前视频信号的场存储器,用于比较参考信号的场识别信号和再现视频信号的场识别信号的比较器,用于选择性地导出再现视频信号之一 响应于比较器的输出信号的一个场和两个场先前的视频信号,以及用于添加再现的视频信号的至少两个后续水平线信号并用于产生平均视频信号的加法电路,用于检测比较器的运动的检测器 响应于再现的视频信号和存储器的输出信号的再现视频信号,用于产生对应于检测器的输出信号的加权信号的加权电路,用于加权加法电路的输出信号和驱动的电路 响应于加权信号的电路和用于将加权输出与平均相组合的电路 视频信号。
    • 24. 发明授权
    • Method for recording and reproducing a digital color video signal
    • 用于记录和再现数字彩色视频信号的方法
    • US4429334A
    • 1984-01-31
    • US194830
    • 1980-10-07
    • Yoshitaka HashimotoNorihisa ShirotaKaichi Yamamoto
    • Yoshitaka HashimotoNorihisa ShirotaKaichi Yamamoto
    • H04N9/808H04N9/873H04N9/877H04N5/91
    • H04N9/808H04N9/873H04N9/877
    • A method for recording a color video signal in a plurality of parallel tracks extending obliquely on a magnetic tape includes the steps of sampling the video signal at a frequency which is at least three times the color sub-carrier frequency of the color video signal, converting the sampled video signal into digital form, and recording respective pluralities of the digitized samples which are arranged in a predetermined sequence sequentially in the plurality of parallel tracks, by either recording respective pluralities of contiguous digitized samples sequentially in the tracks, in which each plurality corresponds to at least one cycle of the color sub-carrier, or by alternately separating contiguous ones of the digitized samples into first and second blocks and recording respective pluralities of successive digitized samples of the first and second blocks sequentially in the tracks with the sampling frequency being equal to four times the color sub-carrier frequency, such that the chrominance component of the digital color video signal can be separated during reproduction so as to correct any error in the phase of the color sub-carrier, and such that with the first embodiment of the last-mentioned step, a digital filter having a chrominance characteristic C=(1-Z.sup. -2)/2 can be used, and with the method according to the second embodiment, a fourth order digital filter having a chrominance characteristic C=(-1=2Z.sup.-2 -Z.sup.-4)/2 can be used to reproduce the chrominance component, where Z is a delay transfer characteristic of the respective filters.
    • 用于在彩色视频信号的彩色副载波频率的至少三倍的频率上对视频信号进行采样的方法,用于在彩色视频信号的彩色副载波频率的至少三倍的频率上对视频信号进行采样, 将采样的视频信号转换为数字形式,并且通过在轨道中顺序地记录多个连续的数字化样本来记录以预定顺序排列在多个并行轨道中的相应多个数字化样本, 到彩色副载波的至少一个周期,或者通过将数字化样本中的相邻的样本交替地分离成第一和第二块,并且以采样频率为单位,在第一和第二块中顺序地记录第一和第二块的相应多个连续数字化采样 等于颜色副载波频率的四倍,使得chr 在再现期间可以分离数字彩色视频信号的偶极分量,以便校正彩色副载波的相位中的任何误差,并且使得在最后提到的步骤的第一实施例中,具有色度特性的数字滤波器 可以使用C =(1-Z -2)/ 2,并且根据第二实施例的方法,具有色度特性C =( - 1 = 2Z-2-Z-4)/ 2的四阶数字滤波器 可以用于再现色度分量,其中Z是相应滤波器的延迟传递特性。