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1. 发明授权

US3883685A Picture signal conversion system 失效
标题翻译：图像信号转换系统
公开(公告)号：US3883685A
公开(公告)日：1975-05-13
申请号：US37995073
申请日：1973-07-17
申请人： HITACHI LTD
发明人： YUMDE YASUFUMI , FURUHATA TAKASHI
IPC分类号： H04B1/66 , G11B20/08 , H04N5/917 , H04N7/00 , H04N7/08 , H04N7/081 , H04N7/12 , H04N19/00
CPC分类号： H04N7/12 , H04N5/917 , H04N7/002
摘要： A system for converting an analog picture signal of a wide band into a pulse train signal of a narrow band composed of means for sampling and storing a picture signal of at least one frame, means for reading the stored signal at each sample value at an arbitrary rate, and means for producing a train of pulses with pulse intervals proportional to the read out sample values can reduce the average transmission time because the entire time of the pulse train signal representing one frame of picture varies depending on the contents of the picture. A system for converting a pulse train signal of a narrow band into an analog picture signal of a wide band composed of means for producing a signal of sample amplitudes proportional to the pulse intervals of a supplied pulse train signal, and storing means in which the signal of sample amplitudes is written at each pulse of the pulse train signal and from which the picture signal is read out at the rate equal to the period of sampling the picture signal after the end of the writing of a signal of one picture in the storing mean.
摘要翻译：一种用于将宽带的模拟图像信号转换为由用于采样和存储至少一帧的图像信号的装置组成的窄带的脉冲串信号的装置，用于以任意的每个样本值读取所存储的信号的装置速率和用于产生具有与读取的采样值成比例的脉冲间隔的脉冲序列的装置可以减少平均传输时间，因为表示一帧图像的脉冲串信号的整个时间根据图像的内容而变化。一种用于将窄带的脉冲串信号转换成宽带的模拟图像信号的系统，所述宽带的模拟图像信号包括用于产生与所提供的脉冲序列信号的脉冲间隔成比例的采样幅度的信号的装置，以及存储装置，在脉冲串信号的每个脉冲上写入采样幅度，并且以等于在存储平均值中的一个图像的信号的写入结束之后的图像信号的采样周期的速率读出图像信号。

2. 发明授权

US3919716A Magnetic recording and/or reproducing apparatus for bandwidth reduced video signal and delayed audio signal 失效
标题翻译：用于带宽降低的视频信号和延迟音频信号的磁记录和/或再现装置
公开(公告)号：US3919716A
公开(公告)日：1975-11-11
申请号：US37613473
申请日：1973-07-03
申请人： HITACHI LTD
发明人： YUMDE YASUFUMI , NARITA SHO , MURAI MIKIO , KUBOTA TAKASHI
IPC分类号： H04N5/928 , G11B20/02 , G11B20/12 , H04N5/782 , H04N5/92 , H04N5/937 , H04N7/12 , H04N9/802 , E04H12/34 , H04N7/00
CPC分类号： H04N5/92 , H04N5/782 , H04N5/9202 , H04N5/937 , H04N9/802
摘要： A video signal recording device comprises magnetic tape recording means for the audio frequency band and first memory means capable of storing a video signal representing one picture, the video signal being written in the memory means at a high speed and read out at a low speed to thereby to convert the signal into a signal in the audio frequency band, so that a signal such as a television signal representing a frame or field is converted into a signal in the audio frequency band by the first memory means and recorded in the magnetic tape recording means together with an audio signal. The audio signal is delayed for a period of time equal to the processing time required for the bandwidth reduction of the video signal. A video signal reproducing device comprises a magnetic tape reproducing means for the audio frequency band and second memory means capable of storing a video signal representing one picture, the video signal being written in the second memory means at a low speed and read at a high speed to thereby to convert a signal in the audio frequency band into a signal of the video frequency band, so that the video signal of the audio frequency band reproduced from the magnetic tape reproducing means is converted into a signal in the video frequency band by the second memory means and repeatedly read out of it to thereby produce a video signal representing a still picture.
摘要翻译：视频信号记录装置包括用于音频频带的磁带记录装置和能够存储表示一个图像的视频信号的第一存储装置，该视频信号被高速写入存储装置并以低速读出，从而将信号转换成音频频带中的信号，使得诸如表示帧或场的电视信号的信号被第一存储装置转换成音频频带中的信号并记录在磁带记录中意味着连同音频信号。音频信号被延迟一段时间等于视频信号的带宽减小所需的处理时间。视频信号再现装置包括用于音频频带的磁带再现装置和能够存储表示一个图像的视频信号的第二存储装置，该视频信号以低速被写入第二存储装置并以高速读取从而将音频频带中的信号转换为视频频带的信号，使得从磁带再现装置再现的音频频带的视频信号被转换成视频频带中的信号，第二个存储装置并重复读出，从而产生表示静止图像的视频信号。

3. 发明授权

US3927420A Frequency dependent compensating circuit for magnetic recording signals 失效
标题翻译：用于磁记录信号的频率相关补偿电路
公开(公告)号：US3927420A
公开(公告)日：1975-12-16
申请号：US41215373
申请日：1973-11-02
申请人： HITACHI LTD
发明人： HAYASHI KENJI , YUMDE YASUFUMI , KAWAMURA KOTARO
IPC分类号： G11B5/035 , G11B5/00 , G11B5/09 , H03G5/22 , G11B5/45 , H03F3/45
CPC分类号： H03G5/22 , G11B5/00
摘要： A magnetic recording and/or reproducing apparatus for audio signals whose frequency to phase characteristic is linear and which comprises a correcting circuit to increase the gain in the high frequency components thereby compensating for the loss of the high frequency components of the reproduced signal which otherwise may occur. The correcting circuit comprises at least one delay circuit, means for obtaining a signal with a predetermined time delay Tau and a 2 Tau delay signal, means for adding a no delay signal to the 2 Tau delay signal, and means for subtracting the added signal from the Tau delay signal.
摘要翻译：用于其频相特性为线性的音频信号的磁记录和/或再现装置，其包括用于增加高频分量中的增益的校正电路，从而补偿再生信号的高频分量的损失，否则可能发生。校正电路包括至少一个延迟电路，用于获得具有预定时间延迟τ和2τ延迟信号的信号的装置，用于将2延迟信号加到2 tau延迟信号的装置，以及用于从 τ延迟信号。

4. 发明授权

US3905039A System for band conversion of color picture signal 失效
标题翻译：彩色图像信号的频带转换系统
公开(公告)号：US3905039A
公开(公告)日：1975-09-09
申请号：US39661173
申请日：1973-09-12
申请人： HITACHI LTD
发明人： YUMDE YASUFUMI , FURUHATA TAKASHI
IPC分类号： H04N5/915 , H04N9/86 , H04N11/02 , H04N9/42
CPC分类号： H04N9/86 , H04N5/915 , H04N11/02
摘要： A system for converting a simultaneous color picture signal of a wide band into a field sequential color picture signal of a narrow band and a system for reconverting a field sequential color picture signal of a narrow band into a simultaneous color picture signal of a wide band. The former system comprises memory means capable of varying the writing speed and the reading speed and having the memory capacity capable of storing a picture signal of one frame, means for switching two input signals to output them at every field period, means for obtaining one of the two chrominance signals of a simultaneous color picture signal at the odd numbered field and obtaining the other chrominance signal at the even numbered field by means of the switching means, and means for writing at a high speed and reading at a low speed in and from the memory means the luminance signal and the chrominance signals different at every field of the color picture signal. The latter system comprises memory means capable of varying the writing speed and the reading speed, having the memory capacity capable of storing a picture signal of one frame, capable of repeatedly reading the stored signal therefrom, and capable of simultaneously reading therefrom signals differing by one field period from each other, means for writing a signal of one frame of a field sequential color picture signal of a narrow band in the memory means at a low speed, and means for repeatedly reading the stored signal at a high speed and obtaining two chrominance signals from the simultaneously read out signals differing by one field period.
摘要翻译：一种用于将宽带的同时彩色图像信号转换为窄带的场顺序彩色图像信号的系统和用于将窄带的场顺序彩色图像信号重新转换为宽带的同时彩色图像信号的系统。前一个系统包括能够改变写入速度和读取速度并具有能够存储一帧的图像信号的存储器容量的存储装置，用于在每个场周期切换两个输入信号以输出它们的装置，用于获得在奇数场的同时彩色图像信号的两个色度信号，并通过切换装置在偶数场获得另一个色度信号，以及用于高速写入并以低速读取的装置存储器是指彩色图像信号的每个场的亮度信号和色度信号不同。后一种系统包括能够改变写入速度和读取速度的存储装置，其具有能够存储一帧的图像信号的存储容量，能够从其重复读取所存储的信号，并且能够同时从其中读取不同于1的信号场周期，用于以低速在存储装置中写入窄带的场顺序彩色图像信号的一帧的信号的装置，以及用于以高速反复读取所存储的信号的装置，并获得两个色度来自同时读出的信号的信号不同于一个场周期。

5. 发明授权

US3685886A Filter for image pickup in surface-sequential color television 失效
标题翻译：用于表面序列彩色电视中的图像抽取滤波器
公开(公告)号：US3685886A
公开(公告)日：1972-08-22
申请号：US3685886D
申请日：1970-10-06
申请人： HITACHI LTD
发明人： NAKAJIMA TOSHIHIKO , YUMDE YASUFUMI
IPC分类号： H04N9/07 , G02B5/22
CPC分类号： H04N9/07
摘要： A filter for image pickup in surface-sequential color television, comprising a rotary disc consisting of a tricolor filter for red, green and blue, boundary lines for division of said three-color filter being in such a spiral form that the tangential line of said each boundary line and the scanning line of an image pickup tube are coincident.
摘要翻译：一种用于表面顺序彩色电视中的图像拾取的滤光器，包括由用于红色，绿色和蓝色的三色滤色器组成的旋转盘，所述三色滤色器的划分为使得所述三色滤色器的切线图像拾取管的每个边界线和扫描线重合。

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