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：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：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：US3947870A

公开(公告)日：1976-03-30

申请号：US490282

申请日：1974-07-22

申请人： Yasufumi Yumde ,  Hiroaki Nabeyama ,  Michio Masuda

发明人： Yasufumi Yumde ,  Hiroaki Nabeyama ,  Michio Masuda

IPC分类号： H04N5/91 ,  G11B20/02 ,  H04N1/00 ,  H04N1/21 ,  H04N5/76 ,  H04N7/025 ,  H04N7/03 ,  H04N7/035 ,  H04N7/08 ,  H04N7/081 ,  H04N7/087 ,  H04N9/79 ,  H04N9/873 ,  H04N9/00

CPC分类号： H04N7/087 ,  H04N1/00098 ,  H04N1/2104 ,  H04N9/873

摘要： There is provided a receiving system for receiving the video signal for each one frame. The video signal is divided into line signals each corresponding to the horizontal scanning period and transmitted sequentially in such a manner that each line signal is inserted in a television signal during each vertical blanking period.The line signals inserted in the transmitted television signal are separated therefrom and the separated line signals are selectively recorded on the odd and even field tracks of a rotary recording medium.Switches for selectively recording the line signals on the even field and odd field tracks are controlled by the output of an odd/even field selection signal generating circuit. The number of revolutions of the rotating recording medium is determined so that the line signals selectively recorded on the even field and odd field tracks of the rotating recording medium are arranged in the correct order and without leaving any spaces between the line signals or causing the line signals to overlap with each other. When the video signals for one frame have been recorded on the rotating recording medium, the one-frame video signals recorded on the rotating recording medium are repeatedly read out to reproduce a still picture.

摘要翻译： 提供了一个接收系统，用于接收每一帧的视频信号。 该视频信号被分成与水平扫描周期对应的线信号，并且以每个垂直消隐期间的每一行信号插入电视信号的顺序传送。

公开(公告)号：US5189564A

公开(公告)日：1993-02-23

申请号：US321778

申请日：1989-03-10

申请人： Nobutaka Amada ,  Takaharu Noguchi ,  Hiroyuki Kimura ,  Masaharu Kobayashi ,  Takao Arai ,  Yasufumi Yumde ,  Kuniaki Miura

发明人： Nobutaka Amada ,  Takaharu Noguchi ,  Hiroyuki Kimura ,  Masaharu Kobayashi ,  Takao Arai ,  Yasufumi Yumde ,  Kuniaki Miura

IPC分类号： G11B20/10 ,  H04L27/18 ,  H04L27/227

CPC分类号： H04L27/2082 ,  G11B20/10 ,  H04L27/227

摘要： In an information recording/reproducing apparatus for recording/reproducing a digital audio signal on/from a magnetic medium, a modulator/demodulator for modulating/demodulating the digital signal by offset quadrature phrase shift keying (O-QPSK). This technique is particularly applicable to the multi-layer recording of video and audio signals in a video tape recording/reproducing system and has the advantage of avoiding interference between the recorded digital audio and video signals at the time of reproduction.

摘要翻译： 在用于在磁介质上记录/再现数字音频信号的信息记录/再现装置，用于通过偏移正交短语移位键控（O-QPSK）来调制/解调数字信号的调制器/解调器。 该技术特别适用于视频磁带记录/再现系统中的视频和音频信号的多层记录，并且具有在再现时避免记录的数字音频和视频信号之间的干扰的优点。

公开(公告)号：US4081834A

公开(公告)日：1978-03-28

申请号：US698519

申请日：1976-06-22

申请人： Tadashi Takamiya ,  Yasufumi Yumde

发明人： Tadashi Takamiya ,  Yasufumi Yumde

IPC分类号： G11B20/02 ,  H04N5/12 ,  H04N5/932 ,  H04N5/95 ,  H04N5/04 ,  H04N5/76 ,  H04N5/78

CPC分类号： H04N5/126 ,  H04N5/932

摘要： A horizontal synchronizing signal contained in a composite video signal undergoing a phase fluctuation is phase modulated and substituted for the original horizontal synchronizing signal. The phase modulation of the horizontal synchronizing signal of the input signal is effected at a phase modulation circuit and then the phase modulated signal is applied to an AFC circuit unit which has the same transfer characteristic as that of a horizontal AFC circuit of an ordinary television receiver set. The phase modulation circuit is controlled by a signal in response to a phase difference between the output of the AFC circuit unit and the original horizontal synchronizing signal. A composite video signal containing the horizontal synchronizing signal subjected to the phase modulation in this manner is applied to the television receiver set, thereby displaying a picture image free from the fluctuation.

摘要翻译： 包含在经历相位波动的复合视频信号中的水平同步信号被相位调制并代替原始的水平同步信号。 输入信号的水平同步信号的相位调制在相位调制电路中进行，然后相位调制信号被施加到具有与普通电视接收机的水平AFC电路相同的传送特性的AFC电路单元 组。 相位调制电路由响应于AFC电路单元的输出与原始水平同步信号之间的相位差的信号控制。 将包含以这种方式进行相位调制的水平同步信号的复合视频信号应用于电视接收机组，从而显示没有波动的图像。

公开(公告)号：US4743977A

公开(公告)日：1988-05-10

申请号：US901803

申请日：1986-08-29

申请人： Atsushi Yoshioka ,  Kuniaki Miura ,  Kazunori Kotani ,  Michio Masuda ,  Yasufumi Yumde ,  Takao Aria

发明人： Atsushi Yoshioka ,  Kuniaki Miura ,  Kazunori Kotani ,  Michio Masuda ,  Yasufumi Yumde ,  Takao Aria

IPC分类号： H04N9/80 ,  H04N9/79 ,  H04N9/797 ,  H04N9/815 ,  H04N9/825 ,  H04N9/835 ,  H04N9/86 ,  G11B5/02 ,  H04N5/782

CPC分类号： H04N9/7921 ,  H04N9/825 ,  H04N9/8355

摘要： Disclosed is a VTR of the helical scan type having a plurality of rotary magnetic heads. This VTR can select one of a first and a second signal recording forms which are different from each other, and record signals on a magnetic tape. In the first recording form, a frequency-modulated video signal including a luminance signal and a color signal and a frequency-modulated sound signal are recorded on the same track so as to be superimposed one on the other. In the second signal recording form, a frequency-modulated luminance signal and a frequency-modulated color signal are recorded separately on tracks adjacent to each other. This VTR has compatibility with respect to the recording/reproducing of two different signals.

摘要翻译： 公开了具有多个旋转磁头的螺旋扫描型的VTR。 该VTR可以选择彼此不同的第一和第二信号记录形式之一，并将信号记录在磁带上。 在第一记录形式中，包括亮度信号和彩色信号的频率调制视频信号以及频率调制的声音信号被记录在相同的轨道上，以便彼此叠加。 在第二信号记录形式中，频率调制亮度信号和调频色信号分别记录在彼此相邻的轨道上。 该VTR与两个不同信号的记录/再现有兼容性。

公开(公告)号：US4937686A

公开(公告)日：1990-06-26

申请号：US929909

申请日：1986-11-13

申请人： Takao Arai ,  Masaharu Kobayashi ,  Nobutaka Amada ,  Yasufumi Yumde ,  Hiroaki Takahashi

发明人： Takao Arai ,  Masaharu Kobayashi ,  Nobutaka Amada ,  Yasufumi Yumde ,  Hiroaki Takahashi

IPC分类号： G11B20/10 ,  G11B20/18 ,  H04N5/928

CPC分类号： H04N5/928 ,  G11B20/10527 ,  G11B20/1809 ,  G11B2020/1087

摘要： A PCM audio signal recording and reproducing apparatus samples an audio signal with a sampling frequency having an asynchronous relation to a field frequency of a video signal; converts it to a PCM signal, adds error detection/correction data to a predetermined number of PCM data, forms a data frame by those signals, modulates it in accordance with a predetermined modulation system, and records the audio signal together with the video signal or just the audio signal on a record medium by using a rotary head type scanner which is controlled so as to have a synchronous relation to the field frequency of the video signal. A digital signal processing circuit having a memory of a predetermined capacity is provided, and the number of digital data to be recorded in one data frame is varied in accordance with a difference between the number of input data of the digital audio signal to the digital signal processing circuit and the number of output data supplied to the record medium for recording. In the recording mode, the PCM audio signal is sectioned into blocks, a data block address signal is added to each block to indicate a relative order of a block to the other blocks and is completely added in one track, certain number of blocks are combined to form a block set for processing signals, and an identification signal completing in the block and an interleave block address signal for indicating a relative order to other blocks are added to each block.

摘要翻译： PCM音频信号记录和再现装置以与视频信号的场频率具有异步关系的采样频率对音频信号进行采样; 将其转换为PCM信号，将错误检测/校正数据添加到预定数量的PCM数据，通过这些信号形成数据帧，根据预定的调制系统对其进行调制，并将音频信号与视频信号一起记录或 通过使用被控制为与视频信号的场频率具有同步关系的旋转头型扫描仪，仅在记录介质上的音频信号。 提供具有预定容量的存储器的数字信号处理电路，并且要记录在一个数据帧中的数字数据的数量根据数字音频信号的输入数据数与数字信号之间的差异而变化 处理电路和提供给用于记录的记录介质的输出数据的数量。 在记录模式下，将PCM音频信号分割为块，将数据块地址信号添加到每个块，以指示块与其他块的相对顺序，并将其完全添加到一个轨道中，将一定数量的块组合 形成用于处理信号的块集合，并且在块中完成的识别信号和用于指示其他块的相对顺序的交织块地址信号被添加到每个块。