公开(公告)号：US4843493A

公开(公告)日：1989-06-27

申请号：US838958

申请日：1986-03-12

申请人： Takashi Furuhata ,  Yasufumi Yumde ,  Fujio Okamura ,  Takaharu Noguchi ,  Toshifumi Shibuya ,  Katsuo Mohri ,  Takao Arai ,  Toshimichi Terada

发明人： Takashi Furuhata ,  Yasufumi Yumde ,  Fujio Okamura ,  Takaharu Noguchi ,  Toshifumi Shibuya ,  Katsuo Mohri ,  Takao Arai ,  Toshimichi Terada

IPC分类号： G11B15/467 ,  G11B15/473

CPC分类号： G11B15/4672 ,  G11B15/4678 ,  G11B15/4738

摘要： A method of producing a tracking control signal in a rotary head type magnetic recording and reproducing apparatus and a rotary head type magnetic recording and reproducing apparatus capable of a proper tracking by the use of the tracking control signal. First and second tracking signals are recorded on local portions of each odd-numbered track and the first tracking signal and a third tracking signal are recorded on local portions of each even-numbered track in such a manner that the second tracking signals on two odd-numbered track adjacent to any one even-numbered track are not overlapped with each other and the third tracking signals on two even-numbered tracks adjacent to any one odd-numbered track are not overlapped with each other when viewed in a direction perpendicular to the longitudinal direction of the tracks; upon scanning of a track crosstalk signals are detected from two adjacent track simultaneously with reproduction of the first and second or third tracking signals; and the detected crosstalk signals are compared by the use of timing of the reproduction of the first tracking signal for each track thereby producing a tracking control signal. The second tracking signal may have a frequency equal to that of the third tracking frequency.

摘要翻译： 一种在旋转磁头式磁记录和再现装置中产生跟踪控制信号的方法以及能够通过使用跟踪控制信号进行适当跟踪的旋转磁头型磁记录和再现装置。 第一跟踪信号和第二跟踪信号被记录在每个奇数号的轨道的本地部分上，并且第一跟踪信号和第三跟踪信号被记录在每个偶数轨迹的本地部分上， 与任何一个偶数编号的轨道相邻的编号轨道彼此不重叠，并且在与任何一个奇数编号的轨道相邻的两个偶数轨道上的第三跟踪信号在垂直于纵向的方向上观察时不彼此重叠 轨道方向; 在轨道的扫描时，与第一和第二或第三跟踪信号的再现同时从两个相邻轨道检测串扰信号; 并且通过使用每个轨道的第一跟踪信号的再现的定时来比较检测到的串扰信号，从而产生跟踪控制信号。 第二跟踪信号可以具有等于第三跟踪频率的频率。

公开(公告)号：US4210927A

公开(公告)日：1980-07-01

申请号：US903609

申请日：1978-05-08

申请人： Yasufumi Yumde ,  Takashi Furuhata

发明人： Yasufumi Yumde ,  Takashi Furuhata

IPC分类号： H04N11/02 ,  H04N11/04 ,  H04N9/32

CPC分类号： H04N11/042

摘要： A method for transmitting a color video signal on a narrow-band transmission line such as a telephone line or an audio tape recorder is disclosed. The carrier frequency is so reduced that no clock signal of high frequency is used. The carrier chrominance signal and the brightness or luminance signal are transmitted separately in time-division multiplication thereby to eliminate color distortion. The write clock signal frequency for the carrier chrominance signal is rendered inversely proportional to the product of a given number determined by the number of samples required for faithful transmission of the carrier chrominance signal and a multiple enabling the carrier frequency to be minimized. The read clock signal frequency for the carrier chrominance signal is reduced to one over an integer of the luminance signal, so that the carrier chrominance signal is read at intervals of the integer in order of storage in a memory. At the time of writing the color chrominance signal in the memory, the write clock frequency therefor is rendered equal to the write clock frequency for the luminance signal. Thus the capacity of the memory for the carrier chrominance signal is one over an integer of that for the luminance signal.

摘要翻译： 公开了一种在诸如电话线或音频磁带记录器的窄带传输线上发送彩色视频信号的方法。 载波频率减小，不使用高频时钟信号。 载波色度信号和亮度或亮度信号以时分乘法分开发送，从而消除颜色失真。 载波色度信号的写时钟信号频率与由载波色度信号的忠实传输所需的采样数确定的给定数乘以与允许载波频率最小化的倍数的乘积成反比。 用于载波色度信号的读取时钟信号频率减少到亮度信号的整数之一，使得载波色度信号以整数的间隔以存储在存储器中的顺序被读取。 在存储器中写入彩色色度信号时，其写入时钟频率等于亮度信号的写入时钟频率。 因此，用于载波色度信号的存储器的容量是用于亮度信号的容量的一个整数。

公开(公告)号：US3941921A

公开(公告)日：1976-03-02

申请号：US396440

申请日：1973-09-12

申请人： Yasufumi Yumde ,  Takashi Furuhata

发明人： Yasufumi Yumde ,  Takashi Furuhata

IPC分类号： H04N7/12 ,  H04N1/28

CPC分类号： H04N7/122

摘要： A system for converting a broad-band picture signal into a narrow-band signal or converting a narrow-band picture signal into a broad-band signal comprising a first memory means which has a capacity of storing a picture signal corresponding to one frame and can record and reproduce a broad-band picture signal at the same speed as the transmitted speed, and a second memory means which has a capacity of storing a picture signal corresponding to one scanning line and is such that writing speed and reading speed can be freely varied. In broad-to-narrow conversion, a broad-band picture signal corresponding to one frame is stored in the first memory means and is read out repeatedly from the first memory means at a speed equal to the speed with which a picture signal is commonly transmitted, and individual line signals appearing from the first memory means are successively written in the second memory means at a suitable time interval and are read out from the second memory means at a low speed corresponding to the desired frequency band. In narrow-to-broad conversion, individual line signals of a broad-to-narrow converted picture signal are successively written in the second memory means at a low speed and are read out therefrom at a high speed to be written in the first memory means, and after the signal corresponding to one frame is written in the first memory means according to the order of the scanning lines, this signal is read out from the first memory means to provide a broad-band picture signal. A plurality of second memory means may be provided so as to improve the efficiency in respect of time of transfer of the signal from the first to the second memory means or from the second to the first memory means and to reduce the period of time occupied by the broad-to-narrow converted frame signal.

摘要翻译： 一种用于将宽带图像信号转换成窄带信号或将窄带图像信号转换成宽带信号的系统，其包括具有存储对应于一帧的图像信号的能力的第一存储装置，并且可以 以与传输速度相同的速度记录和再现宽带图像信号;以及第二存储装置，其具有存储对应于一条扫描线的图像信号的能力，并且使得写入速度和读取速度可以自由变化 。 在宽到窄的转换中，对应于一帧的宽带图像信号被存储在第一存储装置中，并且以等于图像信号被共同传输的速度的速度从第一存储装置重复读出 ，并且从第一存储器装置出现的各个线路信号以合适的时间间隔连续地写入第二存储器装置，并以对应于期望频带的低速从第二存储装置中读出。 在窄到宽的转换中，宽到窄的转换的图像信号的各行信号以低速连续地写入第二存储装置，并从高速读出，以写入第一存储装置 并且在根据扫描线的顺序将对应于一帧的信号写入第一存储装置之后，从第一存储装置读出该信号以提供宽带图像信号。 可以提供多个第二存储器装置，以便提高从第一存储装置或第二存储装置传送信号的时间方面的效率，并且减少由第一存储装置传送到第二存储装置的时间 宽到窄的转换帧信号。

公开(公告)号：US4292652A

公开(公告)日：1981-09-29

申请号：US905524

申请日：1978-05-12

申请人： Yasufumi Yumde ,  Takashi Furuhata

发明人： Yasufumi Yumde ,  Takashi Furuhata

IPC分类号： H04N7/12

CPC分类号： H04N7/125

摘要： In receiving a narrow band video signal transmitted through a narrow band transmission line such as a telephone line, a sound tape recorder or the like, the narrow band video signal is first stored in memories and is then read out therefrom at a higher reading-out speed than the writing-in speed so that the band allocated to the read-out signal is broadened to facilitate the display of the video signal. When reading out the video signal from the memories, the timing of reading out even lines constituting a display image of the video signal is shifted from the timing of reading out odd lines constituting the same display image by a time substantially equal to half the reciprocal of the frequency in terms of the bandwidth of the read-out video signal, the reciprocal corresponding to the resolution limit for the received video signal.

摘要翻译： 在接收通过诸如电话线，声带录音机之类的窄带传输线传输的窄带视频信号时，将窄带视频信号首先存储在存储器中，然后从较高读出读出 速度高于写入速度，使得分配给读出信号的频带变宽以便于视频信号的显示。 当从存储器中读出视频信号时，读出构成视频信号的显示图像的偶数行的定时从构成相同显示图像的奇数行的读出定时偏移大约等于 读出视频信号的带宽的频率，对应于接收的视频信号的分辨率极限的倒数。

公开(公告)号：US4004082A

公开(公告)日：1977-01-18

申请号：US510630

申请日：1974-09-30

申请人： Yasufumi Yumde ,  Takashi Furuhata ,  Kotaro Kawamura

发明人： Yasufumi Yumde ,  Takashi Furuhata ,  Kotaro Kawamura

IPC分类号： H04B14/02 ,  H04J3/00 ,  H04N5/917 ,  H04N5/92 ,  H04N7/00 ,  H04N7/12 ,  H03K1/17 ,  H03K7/00

CPC分类号： H04N5/917 ,  H04B14/026 ,  H04N5/92

摘要： A signal multiplexing method and system for transmitting a television signal by a narrow-band transmission medium incapable of transmitting d.c. components. In this method, a two-polarity pulse train signal consisting of pulses of alternately inverted polarities is subject to pulse modulation by the video information only of the television signal. The horizontal and vertical synchronizing signals indicative of the beginning of a line, field or the like are coded in such a form that some of the successive pulses in the pulse train signal have the same polarity.

摘要翻译： 一种用于通过窄带传输介质发送电视信号的信号复用方法和系统，其不能发送直流 组件。 在该方法中，由交替反转极性的脉冲组成的双极性脉冲串信号仅通过电视信号的视频信息进行脉冲调制。 指示行，场等的开始的水平和垂直同步信号以使得脉冲串信号中的一些连续脉冲具有相同极性的形式被编码。

公开(公告)号：US4642708A

公开(公告)日：1987-02-10

申请号：US759963

申请日：1985-07-29

申请人： Takashi Furuhata ,  Katsuo Mohri ,  Katsuo Konishi

发明人： Takashi Furuhata ,  Katsuo Mohri ,  Katsuo Konishi

IPC分类号： G11B5/588 ,  G11B5/53 ,  G11B5/592 ,  G11B15/467 ,  G11B5/56

CPC分类号： G11B5/5927 ,  G11B15/4677 ,  G11B5/534 ,  G11B5/5921

摘要： The rotary head type helical scanning magnetic tape recording and reproducing apparatus is provided with an auxiliary recording head for recording pilot signals adjacent to a main head for recording a signal to be recorded, and an auxiliary reproducing head for reproducing the recorded pilot signals.The pilot signals recorded to an antecedent track are reproduced by the auxiliary reproducing head at the time of recording to the next track. A tracking control of the main head at the time of next track recording is effected according to the reproduced pilot signals.

摘要翻译： 旋转磁头式螺旋扫描磁带记录和再现装置设置有用于记录与用于记录要记录的信号的主磁头相邻的导频信号的辅助记录头和用于再现记录的导频信号的辅助再现磁头。 记录到前一轨道的导频信号在记录时由辅助再现头再现到下一个轨道。 根据再现的导频信号，进行下一个磁道记录时的主磁头的跟踪控制。

公开(公告)号：US4507690A

公开(公告)日：1985-03-26

申请号：US382104

申请日：1982-05-26

申请人： Nobuo Azuma ,  Kenji Satoh ,  Katsuo Mohri ,  Takashi Furuhata

发明人： Nobuo Azuma ,  Kenji Satoh ,  Katsuo Mohri ,  Takashi Furuhata

IPC分类号： H04N5/7826 ,  G11B15/02 ,  G11B27/024 ,  G11B27/028 ,  H04N5/765 ,  H04N5/77 ,  H04N5/78

CPC分类号： G11B15/02 ,  G11B27/028 ,  H04N5/77 ,  G11B2220/90 ,  G11B27/024 ,  Y10S358/906

摘要： A device for controlling consecutive recording of video information containing signals, on a magnetic recording medium in a magnetic recording and reproducing apparatus, fed from a video camera with variable time spacing. The device comprises a control switch rendered non-conductive or conductive when a pause switch in the magnetic recording and reproducing apparatus is actuated or released, and a member for initializing a sync signal generator in the video camera with a signal produced in synchronism with the rotation of a head carrying disc driving motor of the magnetic recording and reproducing apparatus, whereby energy consumption is lowered and synchronization between successive video information signals is attained rapidly during the consecutive recording of video information signals from the video camera.

摘要翻译： 一种用于控制在具有可变时间间隔的摄像机馈送的磁记录和再现装置中的磁记录介质上连续记录包含信号的视频信息的装置。 该装置包括当磁记录和再现装置中的暂停开关被致动或释放时呈现非导通或导通的控制开关，以及用于利用与旋转同步产生的信号来初始化摄像机中的同步信号发生器的构件 的磁记录和再现装置的磁头驱动电动机，由此能量消耗降低，并且在从摄像机连续记录视频信息信号期间快速获得连续的视频信息信号之间的同步。

公开(公告)号：US4907081A

公开(公告)日：1990-03-06

申请号：US184776

申请日：1988-04-22

申请人： Fujio Okamura ,  Keizo Nishimura ,  Shigemitsu Higuchi ,  Takashi Furuhata

发明人： Fujio Okamura ,  Keizo Nishimura ,  Shigemitsu Higuchi ,  Takashi Furuhata

IPC分类号： H03M7/36 ,  H04N5/926 ,  H04N7/26 ,  H04N11/04

CPC分类号： H04N5/9262 ,  H04N19/10 ,  H04N19/124 ,  H04N19/50 ,  H04N19/90

摘要： A coding device in which N digital signals (time-sequential sampled data), obtained by sampling and quantizing analog video signals, are brought together in one group (N being an integer greater than two) and coded. Among these N sampled data, at least one of them serving as a reference is coded with a number of quantization bits n, which is so great that errors due to the quantization can be neglected, and for the other sampled data the difference between the reference sampled data and each of the others is compressed and coded with a number of bits, which is smaller than n. In this way, even if a coding error is produced; effects thereof are restricted within the gorup where it is produced they are not exerted on the other groups, and thus error propagation does not occur.

摘要翻译： 编码装置，其中通过对模拟视频信号进行采样和量化获得的N个数字信号（时序采样数据）被组合在一起（N是大于2的整数）并被编码。 在这些N个采样数据中，用作参考的至少一个作为参考用多个量化位n进行编码，这样量化位数很大，使得可以忽略由于量化引起的误差，而对于其他采样数据，参考 采样数据，其他每一个被压缩和编码，其数量小于n。 这样，即使产生编码错误， 其产生的限制在产生它们的情况下不会施加在其他组上，因此不会发生错误传播。

公开(公告)号：US4954902A

公开(公告)日：1990-09-04

申请号：US336620

申请日：1989-04-10

申请人： Takashi Furuhata ,  Kenji Satoh

发明人： Takashi Furuhata ,  Kenji Satoh

IPC分类号： G11B5/592 ,  G11B15/467 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/92 ,  H04N5/937

CPC分类号： G11B5/592 ,  G11B15/4675 ,  H04N5/783 ,  H04N5/937

摘要： A tracking control device for use in a rotary magnetic head type magnetic recording/reproducing apparatus, having a device for generating synchronizing signals in synchronism with the rotation of rotary magnetic heads, at a recording mode, records on a magnetic tape original information signals time-base converted so that the synchronizing information included in the information signals is in a predetermined synchronizing relation with said synchronizing signals, together with said synchronizing information; and at a reproduction mode of the recorded information, time-base converts the information signals and synchronizing information to restore the original information and controls the relative speed between the magnetic tape and rotary magnetic heads so that the time of the phase difference between the synchronizing signals and the reproduced synchronizing information is a predetermined value.

摘要翻译： 一种用于旋转磁头型磁记录/再现装置的跟踪控制装置，具有用于在记录模式下与旋转磁头的旋转同步地产生同步信号的装置，在磁带上记录原始信息信号， 基站转换，使得包含在信息信号中的同步信息与所述同步信号一起与所述同步信号预定的同步关系; 并且在记录信息的再现模式下，时基转换信息信号和同步信息以恢复原始信息并控制磁带和旋转磁头之间的相对速度，使得同步信号之间的相位差的时间 并且再现的同步信息是预定值。

公开(公告)号：US4916553A

公开(公告)日：1990-04-10

申请号：US170119

申请日：1988-03-15

申请人： Atsushi Yoshioka ,  Takashi Furuhata ,  Hitoaki Owashi ,  Katsuo Mouri

发明人： Atsushi Yoshioka ,  Takashi Furuhata ,  Hitoaki Owashi ,  Katsuo Mouri

IPC分类号： H04N5/7826 ,  H04N5/92 ,  H04N9/896

CPC分类号： H04N9/896 ,  H04N5/78266 ,  H04N5/92

摘要： In a rotary magnetic head helical scan type video tape recorder using a segment recording system, a video signal of one vertical scanning period is divided into n video signal blocks, where n is an integer equal to or larger than 2, and a redundant period having a selected length is inserted into the video signal blocks in a recording mode. Each of the video signal blocks has a number of horizontal scanning lines equal or smaller than N/n, where N is the number of the horizontal scanning lines in a field of the video signal. In a reproducing mode, a time axis error of reproduced series of the video signal blocks is corrected at least during the redunant periods. Then, the corrected blocks are converted into the original video signal.

摘要翻译： 在使用分段记录系统的旋转磁头螺旋扫描型磁带录像机中，将一个垂直扫描周期的视频信号分成n个视频信号块，其中n是等于或大于2的整数，并且具有 在记录模式下将选定的长度插入到视频信号块中。 每个视频信号块具有等于或小于N / n的多条水平扫描线，其中N是视频信号的场中的水平扫描线的数量。 在再现模式中，至少在冗余期间校正视频信号块的再现系列的时间轴误差。 然后，校正的块被转换成原始视频信号。