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公开(公告)号：US4392162A
公开(公告)日：1983-07-05
申请号：US192196
申请日：1980-09-30
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
IPC分类号： G11B27/10 , G11B5/008 , G11B20/18 , G11B27/02 , H04N5/783 , H04N5/92 , H04N5/926 , H04N5/93 , H04N9/808 , H04N9/877 , H04N5/785
摘要： Apparatus is provided for use in a digital video signal playback device of the type having a record medium in which plural channels of digital video signals are recorded in a like plurality of tracks. Plural transducers, such as playback heads, are associated with respective ones of the channels and reproduce the digital video signals from the plural tracks, each transducer normally reproducing a respective, predetermined channel of the digital video signals. A detector detects the particular channel with which the digital video signal reproduced by each transducer is associated. A signal interchanger is provided with plural channel outputs and is responsive to the detector for directing digital video signals which have been reproduced by transducers associated with channels which differ from the channels of the reproduced digital video signals to the proper channel outputs as determined by the detector. Thus, regardless of the particular transducer which reproduces the digital video signals from a track, that digital video signal nevertheless is supplied to its proper channel output.
摘要翻译： 提供了一种用于具有记录介质的数字视频信号重放设备的设备，其中多个通道的数字视频信号被记录在相同的多个磁道中。 诸如回放头的多个换能器与相应的通道相关联，并且从多个轨道再现数字视频信号，每个换能器通常再现数字视频信号的相应的预定通道。 检测器检测由每个换能器再现的数字视频信号与之相关联的特定通道。 信号交换器设置有多个通道输出，并且响应于检测器，用于引导已经由与再现的数字视频信号的通道不同的通道相关联的换能器再现的数字视频信号到由检测器确定的适当的通道输出 。 因此，无论从轨道再现数字视频信号的特定换能器，该数字视频信号仍被提供给其正确的声道输出。
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公开(公告)号：US4463387A
公开(公告)日：1984-07-31
申请号：US254741
申请日：1981-04-16
CPC分类号： H04N5/9201 , H04N5/78266 , H04N9/802 , H04N9/808
摘要： A digitized video data recording and/or reproducing system comprises a plurality of rotary magnetic heads are disposed on a rotary tape guide drum on the periphery of which a magnetic tape is helically transported at a predetermined wrap angle. A signal processing circuit divides a digitized video signal such that each horizontal scan interval thereof contains a plurality of data blocks, and a signal distributing circuit distributes the blocks of the digitized video data sequentially to the magnetic heads, so that every nth block of each horizontal scan interval is distributed to a respective one of the heads, where n is an even integer. Preferably, there are eight blocks in each horizontal scan interval, and every fourth block is distributed to a respective head.
摘要翻译： 数字化视频数据记录和/或再现系统包括多个旋转磁头，其设置在旋转磁带引导鼓上，周边以预定的包角螺旋形地传送磁带。 信号处理电路将数字化视频信号分割成其每个水平扫描间隔包含多个数据块，并且信号分配电路将数字化视频数据的块顺序地分配给磁头，使得每个水平的每第n个块 扫描间隔被分配给相应的一个磁头，其中n是偶数整数。 优选地，在每个水平扫描间隔中存在八个块，并且每个第四块被分配到相应的头。
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公开(公告)号：US4429334A
公开(公告)日：1984-01-31
申请号：US194830
申请日：1980-10-07
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US4275466A
公开(公告)日：1981-06-23
申请号：US98770
申请日：1979-11-29
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
摘要： A sync signal extracting circuit suitable for a digital information processing apparatus, such as a digital video tape recorder, is provided, which can promptly detect an incorrect sync state and which can quickly and accurately recover a correct sync state. The circuit extracts the sync signals or portions from a digital information signal consisting of a plurality of successive blocks, each consisting of N successive bits (where N is an integer) and each having a sync signal or portion consisting of a predetermined sync bit pattern and a data portion. The circuit comprises a sync bit pattern detecting circuit for generating a detected sync signal when it detects the occurrence of the sync bit pattern in the information signal, a counting circuit for providing a count having a successive one of N cyclical count values in response to each successive bit of the information signal and generating a counted sync signal at every Nth bit of the information signal, and a check mode circuit for memorizing the count of the counting circuit when the detected sync signal is generated other than in conjunction with the counted sync signal, for generating a checked sync signal if a detected sync signal is generated the next time the counting circuit equals the memorized count, and for changing the count of the counting circuit in response to the generation of the checked sync signal so that the counting circuit will be synchonized with the detected sync signals which gave rise to the checked sync signal.
摘要翻译： 提供一种适用于诸如数字磁带录像机的数字信息处理装置的同步信号提取电路，其可以及时检测不正确的同步状态，并能够快速准确地恢复正确的同步状态。 该电路从由多个连续块组成的数字信息信号中提取同步信号或部分，每个连续块由N个连续位（其中N是整数）组成，并且每个具有同步信号或由预定同步位模式组成的部分， 数据部分。 该电路包括同步位模式检测电路，用于当其检测到信息信号中的同步位模式的出现时产生检测到的同步信号;计数电路，用于响应于每个N个周期计数值提供具有N个周期计数值的连续的一个的计数 信息信号的连续位，并在信息信号的每第N位产生计数的同步信号;以及检查模式电路，用于当检测到的同步信号与计数的同步信号相结合时存储计数电路的计数 如果在下一次计数电路等于存储的计数时产生检测到的同步信号，并且响应于所检查的同步信号的产生来改变计数电路的计数，使得计数电路将 与检测到的同步信号同步，产生检查的同步信号。
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公开(公告)号：US4533937A
公开(公告)日：1985-08-06
申请号：US416329
申请日：1982-09-09
申请人： Kaichi Yamamoto , Jun Yonemitsu
发明人： Kaichi Yamamoto , Jun Yonemitsu
CPC分类号： H04N9/75
摘要： A key signal generating apparatus for a digital chromakey system for generating a key signal in accordance with the difference between a reference hue corresponding to a back color data and a hue of an input video data in U-V chroma signal coordinates, in which the gain of key signal is determined by quadratic curve groups in the U-V chroma signal coordinates.
摘要翻译： 一种用于数字色度系统的键信号产生装置，用于根据UV色度信号坐标中的与背色数据相对应的参考色调和输入视频数据的色调之间的差产生一个键信号，其中键增益 信号由UV色度信号坐标中的二次曲线组确定。
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公开(公告)号：US4509016A
公开(公告)日：1985-04-02
申请号：US581204
申请日：1984-02-21
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
CPC分类号： H04N9/455
摘要： A signal detecting circuit detects the presence in an input signal of a component of a predetermined frequency f.sub.p. The circuit includes a sampling arrangement for sampling the input signal at predetermined times separated by a sampling period 1/f.sub.s and providing first, second, and third signal samples. An adding circuit provides a sum signal A+C from the first and third signal samples, and a calculating circuit provides a calculated signal 2B cos .theta. from the second signal sample, where .theta. is the phase relation of the signal samples 2.pi.f.sub.s /f.sub.p. A comparator provides an output signal when the values of the sum signal A+B and the calculated signal 2B cos .theta. are substantially equal, indicating the presence of the component of interest.
摘要翻译： 信号检测电路检测在预定频率fp的分量的输入信号中的存在。 该电路包括采样装置，用于以预定时间对采样周期1 / fs分隔的输入信号进行采样，并提供第一，第二和第三信号采样。 加法电路提供来自第一和第三信号采样的和信号A + C，并且计算电路从第二信号样本提供计算的信号2Bcosθ，其中θ是信号样本2 pi fs / fp的相位关系 。 当和信号A + B和计算出的信号2Bcosθ的值基本上相等时，比较器提供输出信号，指示感兴趣的分量的存在。
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公开(公告)号：US4488169A
公开(公告)日：1984-12-11
申请号：US396339
申请日：1982-07-08
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
CPC分类号： H04N9/75
摘要： In a digital chromakey apparatus, a digital key signal is generated in response to specified chroma information of first digital video signal designating a foreground scene and the first digital video signal is switched into second digital video signal designating a background scene in accordance with level of the digital key signal. According to this invention, the digital key signal is adjusted or compensated in level at portions of leading and trailing edges thereof so as to expand or compress the area of chromakey.
摘要翻译： 在数字彩色设备中，响应于指定前景场景的第一数字视频信号的指定色度信息产生数字键信号，并且将第一数字视频信号切换为指定背景场景的第二数字视频信号， 数字键信号。 根据本发明，数字键信号在其前缘和后缘的部分被调整或补偿，以便扩展或压缩色度区域。
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公开(公告)号：US06300972B1
公开(公告)日：2001-10-09
申请号：US08995477
申请日：1997-12-22
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
IPC分类号： H04N714
摘要： A video card capable of being mounted in an information processing apparatus so as to enable suitable performance of a television conference system etc., wherein video data fetched into a video card from a camera by a capture operation is recorded in the first region of a DRAM and encoded at a signal processing unit. The encoded video data is recorded in the second region of the DRAM, sequentially transferred to a main memory of a notebook type PC, and transmitted to a network via a communication I/F card. The video data received from the network is stored once in the main memory, transferred to the fourth region of the DRAM of the video card, decoded at the signal processing unit, and recorded in the third region of the DRAM. Immediately before the next capture operation, the video data which was fetched into the first region of the DRAM before this and the received video data which has been recorded in the third region are displayed on a display via a VGA controller.
摘要翻译： 一种视频卡，其能够安装在信息处理设备中，以便能够实现电视会议系统等的适当性能，其中通过捕获操作从摄像机获取的视频数据被记录在DRAM的第一区域中 并在信号处理单元处编码。 编码的视频数据被记录在DRAM的第二区域中，顺序地传送到笔记本型PC的主存储器，并且经由通信I / F卡发送到网络。 从网络接收的视频数据被存储在主存储器中一次，被传送到视频卡的DRAM的第四区域，在信号处理单元处解码，并被记录在DRAM的第三区域中。 紧接着在下一次捕捉操作之前，被取出到DRAM之前的DRAM的第一区域的视频数据和已被记录在第三区域中的接收的视频数据经由VGA控制器显示在显示器上。
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9.发明授权Apparatus for recording digital data of various kinds on a slant track of a recording tape 失效用于在记录带的倾斜轨道上记录各种数字数据的装置
公开(公告)号：US4672480A
公开(公告)日：1987-06-09
申请号：US669857
申请日：1984-11-09
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
IPC分类号： G11B5/008 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/00 , G11B27/30 , G11B27/32 , G11B5/09
CPC分类号： G11B20/10527 , G11B20/1209 , G11B20/1809 , G11B27/005 , G11B27/3027 , G11B27/32 , G11B27/322 , G11B5/00873 , G11B5/00878 , G11B20/1211 , G11B2020/10546 , G11B2220/90
摘要： Digital data is recorded on a slant track of a magnetic tape by a rotary head, in which the sampling frequency of the digital data can be changed in accordance with the nature of the digital data. The recording apparatus comprises a memory for writing the digital data in response to an input clock signal which is synchronized with the sampling frequency and reading the digital data therefrom in response to a system clock signal; and a circuit for converting the digital data read out from the memory into a data block having such a capacity that the data block can be recorded during one scan of the rotary head. Even when the data rate of the input digital signal is unclear, if the data rate lies within a range where the buffer memory does not overflow, the apparatus can continuously record the input digital signal. Thus, the apparatus can easily interface with an external computer.
摘要翻译： 数字数据通过旋转磁头记录在磁带的倾斜磁道上，数字数据的采样频率可以根据数字数据的性质而改变。 记录装置包括：响应于与采样频率同步并响应于系统时钟信号从其读取数字数据的输入时钟信号来写入数字数据的存储器; 以及用于将从存储器读出的数字数据转换成具有在旋转磁头的一次扫描期间能够记录数据块的容量的数据块的电路。 即使当输入数字信号的数据速率不清楚时，如果数据速率处于缓冲存储器不溢出的范围内，则设备可以连续记录输入的数字信号。 因此，该装置可以容易地与外部计算机接口。
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公开(公告)号：US4437125A
公开(公告)日：1984-03-13
申请号：US315450
申请日：1981-10-27
申请人： Kaichi Yamamoto
发明人： Kaichi Yamamoto
IPC分类号： H04L1/00 , G11B20/18 , H04N5/782 , H04N5/7826 , H04N5/92 , H04N5/926 , H04N5/93 , H04N9/804 , H04N9/808 , H04N9/888 , H04N5/785
CPC分类号： H04N5/926 , G11B20/1806 , H04N5/782 , H04N5/9201 , H04N5/93 , H04N9/888
摘要： An identification signal is generated to identify a digital signal, such as a digital video signal reproduced by a digital video tape recorder (DVTR), as odd or even. Commencing periodically, such as at the onset of each field interval, identification signals occurring at intervals in the digital signal are sampled, and an odd plurality (e.g., three) thereof determined to be error-free are stored. A synthetic identification signal is generated whose value is determined by the majority of the stored identification signals. The generated signal is then stored, for example, in a cascade of flip-flops, to provide a second synthetic identification signal from the onset of each field interval until the majority of the sampled identification signals is determined. In a circuit for processing a digital video signal, an identification signal for identifying line intervals as even or odd is derived by taking the modulo-two sum of field and frame identification signals to determine the state of the line identification signal at the beginning of each field, and thereafter inverting the identification signal at each line interval.
摘要翻译： 产生识别信号以识别数字信号，例如由数字录像机（DVTR）再现的数字视频信号，奇数或偶数。 定期地，例如在每个场间隔的开始时，以数字信号中的间隔发生的识别信号被采样，并且存储确定为无错误的奇数个（例如，三个）。 产生合成识别信号，其值由所存储的识别信号的大部分确定。 然后，所生成的信号例如被存储在级联的触发器中，以从每个场间隔的开始提供第二合成识别信号，直到确定了大部分采样的识别信号。 在用于处理数字视频信号的电路中，通过采用场和帧识别信号的模二来确定用于识别线间隔为偶数或奇数的识别信号，以确定每个开始处的行识别信号的状态 场，然后在每个行间隔反转识别信号。
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