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31. 发明授权

US5668677A Apparatus for recording and reproducing variable length codes 失效
标题翻译：用于记录和再现可变长度码的装置
公开(公告)号：US5668677A
公开(公告)日：1997-09-16
申请号：US220172
申请日：1994-03-30
申请人： Takahito Seki , Yukio Kubota
发明人： Takahito Seki , Yukio Kubota
IPC分类号： G11B20/12 , G11B27/30 , H04N5/7826 , H04N5/784 , H04N5/92 , H04N5/926 , H04N7/54 , G11B5/09 , G11B5/00
CPC分类号： H04N5/9268 , G11B20/1208 , G11B27/3027 , G11B27/3063 , H04N5/9264 , H04N7/54 , G11B2220/90 , H04N5/78263 , H04N5/784
摘要： A digital signal recording and reproducing apparatus are disclosed which can record digital data of the advanced television (ATV) system or some other digital data onto a recording medium without the necessity of displacing recording areas for sub codes of the recording medium and can thus make effective use of the recording capacity of the recording medium. When an ordinary television signal is to be recorded, the length of the Inter Block Gap IBG and amble areas between an audio signal recording area and a video signal recording area is set to an integral number of times the length of a synchronizing block of a digital audio signal and a digital video signal. When data of the ATV system or like data are to be recorded, the data are recorded continuously from the audio signal recording area to the video signal recording area.
摘要翻译：公开了一种数字信号记录和再现装置，其可以将高级电视（ATV）系统的数字数据或一些其他数字数据记录到记录介质上，而不需要移动用于记录介质的子代码的记录区域，并且因此可以有效地使用记录介质的记录容量。当要记录普通的电视信号时，音频信号记录区和视频信号记录区之间的间隔间隙IBG的长度和位置之间的长度被设置为数字的同步块的长度的整数倍音频信号和数字视频信号。当要记录ATV系统或类似数据的数据时，将数据从音频信号记录区连续记录到视频信号记录区。

32. 发明授权

US5337193A Apparatus for selectively recording and/or reproducing a video signal with a PCM audio signal or with an FM audio signal 失效
标题翻译：用于利用PCM音频信号或FM音频信号选择性地记录和/或再现视频信号的装置
公开(公告)号：US5337193A
公开(公告)日：1994-08-09
申请号：US408570
申请日：1989-09-18
申请人： Noboru Murabayashi , Takahito Seki
发明人： Noboru Murabayashi , Takahito Seki
IPC分类号： G11B5/008 , G11B15/087 , G11B15/12 , G11B20/10 , H04N5/782 , H04N5/91 , H04N9/835 , G11B5/02
CPC分类号： G11B20/10527 , G11B15/087 , G11B15/125 , G11B5/00878 , H04N5/78213 , H04N5/91 , H04N9/8355
摘要： A VTR has heads adapted for reading out a video signal, a PCM audio signal, and an FM audio signal, respectively, from a magnetic tape, and a signal detecting circuit operable to detect which of the video, PCM and FM signals are recorded on the magnetic tape and to provide a signal indicative thereof to a system control circuit which controls a switching circuit for selectively connecting FM and PCM audio demodulating circuits with a signal output line, so that the video signal and the PCM audio signal or the video signal and the FM audio signal are output to be reproduced. The VTR further includes a recording system adapted to record a video signal, a PCM audio signal, and an FM audio signal in respective magnetic layers of a magnetic tape which are at different depths relative to the surface of the magnetic tape in accordance with a predetermined recording current relationship used for recording the video, FM audio and PCM audio signals so as to improve the S/N ratio of each signal when reproduced.
摘要翻译： VTR具有分别从磁带读出视频信号，PCM音频信号和FM音频信号的头部，以及可操作以检测哪个视频PCM和FM信号被记录在其上的信号检测电路并且向系统控制电路提供指示信号的信号，该系统控制电路控制用于选择性地将FM和PCM音频解调电路与信号输出线连接的开关电路，使得视频信号和PCM音频信号或视频信号和 FM音频信号被输出以被再现。 VTR还包括记录系统，其适于在磁带的相应磁性层中记录视频信号，PCM音频信号和FM音频信号，磁带相对于磁带的表面处于与磁带表面不同的深度记录用于记录视频，FM音频和PCM音频信号的电流关系，以便在再现时提高每个信号的S / N比。

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