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    • 42. 发明授权
    • Apparatus for recording/reproducing a digital signal at variable speeds
    • 用于以可变速度记录/再现数字信号的装置
    • US4942487A
    • 1990-07-17
    • US157795
    • 1988-02-19
    • Takaharu NoguchiTakao Arai
    • Takaharu NoguchiTakao Arai
    • G11B5/09G11B15/18G11B15/467G11B27/00
    • G11B27/005G11B15/1875G11B15/4678
    • A digital signal recording/reproducing apparatus for enabling recording/reproduction at variable speeds including normal speed, and at least one of N-times normal speed and 1/N-times normal speed while maintaining the reproducing frequency constant so as to not require switching of analog circuits. At the time of reproduction at normal speed, N-times normal speed or 1/N-times normal speed, the feed speed of the magnetic tape and the timing of picking up of a reproducing signal from the magnetic tape are varied while the speed of revolution of a cylinder of a rotary head is maintained constant so that the timing of detection of pilot signals for generating a tracking error signal is varied to cope with difference in track scanning conditions in recording and reproducing modes.
    • 一种数字信号记录/再现装置,用于在保持再现频率恒定的同时能够以包括正常速度在内的可变速度和N倍正常速度和1 / N倍正常速度中的至少一个进行记录/再现,从而不需要切换 模拟电路。 在正常速度再现N倍正常速度或正常速度的1 / N倍时,磁带的进给速度和从磁带拾取再现信号的定时被改变,而速度 旋转磁头的气缸的旋转保持恒定,使得用于产生跟踪误差信号的导频信号的检测定时被改变以应对记录和再现模式中的磁道扫描条件的差异。
    • 48. 发明申请
    • Recording/playback system for medium compliant to copy control
    • 录音/播放系统,适合中档兼容复制控制
    • US20060067530A1
    • 2006-03-30
    • US11236725
    • 2005-09-28
    • Takaharu NoguchiAkira ShibataHitoaki Owashi
    • Takaharu NoguchiAkira ShibataHitoaki Owashi
    • H04N7/167
    • H04N5/913G11B20/00086H04N2005/91328
    • By introducing a new copy control system into video signals subjected to picture quality restriction satisfactory only in small-sized PMP displays, a new business model in which copyrighters, consumers and makers can have mutual prosperity is created. “A new copy control rule of prohibiting a video signal output with a picture quality equivalent to that at time of recording from being copied, but permitting a video signal sufficiently degraded in picture quality as compared with time of recording to be copied” is added to the copy-never, copy-one-generation, and copy-free states belonging to the conventional copy control rule. The quality for which the copyrighter can permit copying corresponds to half the current number of DVD pixels. If a quality restricting scheme of thinning out pixels to half compared with time of recording is used, therefore, needs of consumers desiring to enjoy PMPs are satisfied while protecting rights of copyrighters.
    • 通过将新的复制控制系统引入到仅在小型PMP显示器中令人满意的图像质量限制的视频信号中,创建了一种新的商业模式,其中复印机,消费者和制造商可以相互繁荣。 “与被复制的记录时相同的图像质量的视频信号输出的新的复制控制规则被添加到与要复制的记录的时间相比在图像质量中充分劣化的视频信号” 属于常规复制控制规则的复制永远不会复制一代和无副本状态。 复印机可以允许复印的质量对应于当前DVD像素数量的一半。 如果使用与记录时间相比减半像素的质量限制方案,则保护想要享受PMP的消费者的需求得到满足,同时保护了复印机的权利。