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    • 5. 发明授权
    • Impulse noise reducer detecting impulse noise from an audio signal
    • 脉冲降噪器检测来自音频信号的脉冲噪声
    • US06795559B1
    • 2004-09-21
    • US09723201
    • 2000-11-28
    • Kenichi TauraMasahiro TsujishitaMasayuki TsujiMasayuki Ishida
    • Kenichi TauraMasahiro TsujishitaMasayuki TsujiMasayuki Ishida
    • H04B1500
    • H04B1/1027
    • An impulse noise reducer detects impulse noise in an audio signal by detecting and smoothing the high-frequency amplitude of the audio signal, attenuating the non-smoothed amplitude according to the smoothed amplitude, and comparing the attenuated amplitude with a threshold. Impulse noise is discriminated from high-frequency audio components because the latter tend to occur in longer-lasting bursts and are therefore attenuated more strongly. The impulse noise reducer is simplified because it does not have to perform intermediate-frequency signal processing, and its sensitivity is not affected by adjacent-channel signals because these signals are substantially absent from the audio signal. The impulse noise reducer can be implemented by digital signal processing, and is suitable for use in a medium-wave AM audio broadcast receiver.
    • 脉冲噪声降低器通过检测和平滑音频信号的高频振幅来检测音频信号中的脉冲噪声,根据平滑的幅度衰减非平滑幅度,并将衰减幅度与阈值进行比较。 脉冲噪声与高频音频分量区分开来,因为后者往往会发生在持续较长的脉冲串中,因此会更强烈地衰减。 由于不需要执行中频信号处理,所以脉冲噪声减少器被简化,并且其灵敏度不受相邻信道信号的影响,因为这些信号基本上不存在于音频信号中。 脉冲减噪器可以通过数字信号处理实现,适用于中波AM音频广播接收机。
    • 7. 发明授权
    • Telecine signal conversion method and an up-converter
    • 电视电影信号转换方法和上变频器
    • US6144410A
    • 2000-11-07
    • US770833
    • 1996-12-20
    • Hidehiko KikuchiMasayuki Ishida
    • Hidehiko KikuchiMasayuki Ishida
    • H04N5/253G11B27/32G11B27/34H04N7/01H04N11/20
    • H04N7/0112G11B27/323G11B27/34H04N7/012
    • Telecine signal conversion method for converting an interlaced scan telecine signal generated by 2-3 pull-down system, wherein a picture of the first frame is converted into an interlaced signal of the first and second fields and a picture in the following second frame is converted into an interlaced signal in the third, fourth and fifth fields, into a progressively scanned telecine signal comprising steps of detecting a pull-down phase of the interlaced scan telecine signal, specifying the first and second fields based on the detected pull-down phase, composing picture signals of the specified first and second fields and generating progressively scanned telecine signals from the picture signals of the first and second frames, and specifying the third and fourth fields based on the detected pull-down phase, composing picture signals of the specified third and fourth fields and generating progressively scanned telecine signals from the picture signals of the third, fourth and fifth frames.
    • 用于转换由2-3下拉系统产生的隔行扫描电视电影信号的电视电影信号转换方法,其中第一帧的图像被转换成第一和第二场的隔行扫描信号,并且在随后的第二帧中的图像被转换 将第三,第四和第五场中的隔行扫描信号转换为渐进扫描的电视电影信号,包括以下步骤:检测隔行扫描电视电影信号的下拉相位,基于检测到的下拉相指定第一和第二场, 构成指定的第一和第二场的图像信号,并且从第一和第二帧的图像信号产生逐渐扫描的电视电影信号,并且基于检测到的下拉相指定第三和第四场,构成指定的第三和第二帧的图像信号 和第四场,并且从第三,第四和第五帧的图像信号产生渐进扫描的电视电影信号 es。
    • 8. 发明授权
    • Picture replacement system and picture replacement method
    • 图片更换系统和图片更换方法
    • US5973751A
    • 1999-10-26
    • US819600
    • 1997-03-17
    • Masayuki IshidaToru Koguma
    • Masayuki IshidaToru Koguma
    • H04N5/278H04N5/272H04N9/74H04N5/262
    • H04N5/2723H04N5/272
    • A picture replacement system for replacing a specified area of an original picture, with a desired picture comprising at least one camera for shooting an original picture of the subject; at least one irradiation unit for radiating a specified area of the subject with a predetermined invisible light ray; a picture generation unit for generating a desired picture that matches a size of the specified area; a detection unit for detecting the invisible light ray reflecting from the specified area that has passed around an obstruction in front of the specified area of the subject without being obstructed; a key signal generation unit for generating a key signal indicating a replacement area of the original picture based on a detection result of the detection unit; and a replacement unit for replacing the specified area within the replacement area with a desired picture corresponding to the key signal indicating the replacement area.
    • 一种图像替换系统,用于替换原始图像的指定区域,其中所需图像包括用于拍摄被摄体的原始图像的至少一个相机; 至少一个照射单元,用于以预定的不可见光线照射被摄体的指定区域; 图像生成单元,用于生成与指定区域的大小匹配的期望图像; 检测单元,用于检测从被遮蔽物体的指定区域前方的障碍物周围的特定区域反射的不可见光线; 键信号生成单元,用于根据检测单元的检测结果生成指示原始图像的替换区域的键信号; 以及替换单元,用于用与指示替换区域的键信号相对应的期望图像替换替换区域内的指定区域。