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    • 2. 发明授权
    • Field/frame conversion method for magnetic picture recording with
demodulation, interpolation and de-emphasis after conversion
    • 具有解调,插值和转换后去加重的磁图像记录的场/帧转换方法
    • US4758900A
    • 1988-07-19
    • US885780
    • 1986-07-15
    • Yasuhito Kobayashi
    • Yasuhito Kobayashi
    • H04N7/01G11B5/027G11B20/02G11B20/06H04N5/93H04N9/86
    • H04N5/93H04N9/86
    • A field/frame signal conversion method in a magnetic picture recording for use in an electronic still camera and the like is disclosed which prevents the lowering of a SN ratio of a field signal and the occurrence of flicker caused by delaying the field signal. In the field/frame signal conversion method, an operation of delaying the field signal for the field/frame signal conversion as well as for an arithmetic mean operation, performed for the purpose of preventing the occurrence of the V jitter caused by the field/frame signal conversion, is carried out in the frequency modulated condition of the field signal. Then the arithmetic mean operation is performed after the field signal is frequency demodulated and before it is de-emphasized. Thus, it is possible to prevent lowering of the SN ratio of the field signal resulting from the delay operation on the field signal as well as the occurrence of flicker due to a difference in level between an undelayed filed signal and a one-half horizontal scan period delayed field signal produced when performing the field/frame signal conversion.
    • 公开了一种在电子静态照相机等中使用的磁性图像记录中的场/帧信号转换方法,其防止了场信号的SN比降低和延迟场信号引起的闪烁的发生。 在场/帧信号转换方法中,为了防止由场/帧信号转换引起的V抖动的发生,执行延迟场/帧信号转换的场信号以及算术平均操作的操作 信号转换,在场信号的调频条件下进行。 然后在场信号被频率解调之后并且在其被去强调之前执行算术平均操作。 因此,可以防止由于场信号的延迟操作引起的场信号的SN比降低,以及由于未延迟的场信号和一半水平扫描之间的电平差引起的闪烁的发生 执行场/帧信号转换时产生的周期延迟场信号。
    • 6. 发明授权
    • Field/frame conversion circuit
    • 场/帧转换电路
    • US4812919A
    • 1989-03-14
    • US46710
    • 1987-05-07
    • Yoshiki IwaseYasuhito Kobayashi
    • Yoshiki IwaseYasuhito Kobayashi
    • H04N5/915H04N9/83H04N9/87H04N5/76H04N9/79
    • H04N5/915H04N9/83H04N9/87
    • A field/frame conversion circuit for use in a magnetic recording/reproducing apparatus which magnetically records and reproduces still images or the like.In the field/frame conversion circuit, after the frequency of a field signal obtained from a magnetic recording medium such as a magnetic disc and composed of frequency-multiplexed brightness and chroma signals is converted into a higher frequency band than the frequency band of the brightness signal, the field signal is delayed in the frequency modulated state thereof 0.5 horizontal scan period necessary for the field/frame conversion by a signal delay line having a wide band frequency characteristic. The thus delayed field signal and an undelayed field signal are selected alternately at every one vertical scan period by signal switching means so as to perform the field/frame conversion.
    • 用于磁记录和再现静止图像等的磁记录/再现装置中的场/帧转换电路。 在场/帧转换电路中,在从诸如磁盘的磁记录介质获得的并且由频率复用的亮度和色度信号组成的场信号的频率被转换成比亮度的频带更高的频带 信号,场信号在具有宽带频率特性的信号延迟线进行场/帧转换所需的0.5个水平扫描周期的调频状态下被延迟。 这样延迟的场信号和未延迟的场信号由信号切换装置在每一个垂直扫描周期被交替地选择,以便执行场/帧转换。
    • 7. 发明授权
    • Processing circuit for television sync signals produced from a recording
medium for preforming a non-interlaced display
    • 用于预处理非隔行显示的记录介质产生的用于电视同步信号的处理电路
    • US4766506A
    • 1988-08-23
    • US814617
    • 1985-12-30
    • Motoi YagiTadao MiyabayashiYasuo MorikawaYasuhito Kobayashi
    • Motoi YagiTadao MiyabayashiYasuo MorikawaYasuhito Kobayashi
    • H04N5/04H04N5/06H04N5/91H04N5/93H04N5/932H04N5/78
    • H04N5/932
    • A television synchronizing signal processing circuit includes a reproduction/demodulation circuit for repetitively reading a video signal corresponding to one field from a video signal recording medium and demodulating the video signal and for separating a synchronizing signal from a reproduced/demodulated signal, a first delay circuit for permitting the video signal of the reproduced/demodulated signal which is supplied for every other field from the reproduction/demodulation circuit to be delayed by a time corresponding to one half the period H of a horizontal synchronizing signal, a second delay circuit for delaying a vertical synchronizing signal of the synchronizing signal which is supplied from the reproduction/demodulation circuit, and a waveform synthesizing circuit for synthesizing output signals from the first and second delay circuits to produce a composite video signal. In the processing circuit, the second delay circuit has a variable time TD which is variable within a range of0
    • 电视同步信号处理电路包括一个再现/解调电路,用于重复地从视频信号记录介质读取与一个场相对应的视频信号,并对视频信号进行解调并从再现/解调信号中分离同步信号;第一延迟电路 用于允许来自再现/解调电路的每隔一个场提供的再现/解调信号的视频信号被延迟与水平同步信号的周期H的一半相对应的时间;第二延迟电路,用于延迟 从再现/解调电路提供的同步信号的垂直同步信号和用于合成来自第一和第二延迟电路的输出信号以产生复合视频信号的波形合成电路。 在处理电路中,第二延迟电路具有在0