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1. 发明授权

US5220477A Cassette tape-loading apparatus 失效
标题翻译：盒带装载装置
公开(公告)号：US5220477A
公开(公告)日：1993-06-15
申请号：US668127
申请日：1991-03-12
申请人： Tomohide Sorihashi , Shigemitsu Higuchi , Hideo Nishijima , Yuji Inaba
发明人： Tomohide Sorihashi , Shigemitsu Higuchi , Hideo Nishijima , Yuji Inaba
IPC分类号： G11B15/43 , G11B15/665
CPC分类号： G11B15/665 , G11B15/43
摘要： A cassette tape-loading apparatus applied to a magnetic recording and reproducing apparatus using a cassette tape comprises a device for determining the amount of rotation of supply and take-up reels, a device for detecting the rotational direction of the reels, and a device for detecting the amount of tape drawn out of the cassette. Before loading the cassette tape, the ratio of winding diameter between the supply and take-up reels is computed, and the result is used to set the torque of the reel-driving motors and start the loading operation. At the time of loading, on the other hand, the amount of rotation of the two reels is determined, and the winding diameters of the reels computed from the winding diameter ratio and the amount of drawn-out tape thereby to set a proper tension of the magnetic tape. Since the tension applied to the magnetic tape and the torques of the reel motors are set in accordance with the winding diameter ratio and the winding diameters, magnetic tape of substantially equal amount is drawn out of each of the two reels, with the result that the magnetic tape is not subjected to an abnormal tension, thereby making possible a stable cassette tape-loading operation without damaging the tape or displacing the tape position.
摘要翻译：使用盒式磁带的应用于磁记录和再现装置的盒式磁带装载装置包括用于确定供应和卷取卷轴的旋转量的装置，用于检测卷轴的旋转方向的装置，以及用于检测从磁带盒中抽出的磁带的数量。在装入盒式磁带之前，计算供给卷轴和卷取卷轴之间的卷绕直径的比例，结果用于设定卷轴驱动电机的转矩并开始加载操作。另一方面，在装载时，确定两个卷轴的旋转量，并且根据卷绕直径比计算出的卷轴的卷绕直径和拉出卷的数量，从而设定适当的张力磁带。由于施加到磁带的张力和卷轴电动机的转矩根据卷绕直径比和卷绕直径设定，所以两个卷轴中的每一个卷取出大致相等量的磁带，结果是磁带不会受到异常张力，从而使得可以稳定的盒式磁带装载操作而不损坏磁带或移动磁带位置。

2. 发明授权

US5636316A Picture signal digital processing unit 失效
标题翻译：图像信号数字处理单元
公开(公告)号：US5636316A
公开(公告)日：1997-06-03
申请号：US283685
申请日：1994-08-01
申请人： Masuo Oku , Yukio Fujii , Masaru Takahashi , Kenji Ichige , Keizo Nishimura , Atsuo Suga , Shigemitsu Higuchi , Tomohide Sorihashi
发明人： Masuo Oku , Yukio Fujii , Masaru Takahashi , Kenji Ichige , Keizo Nishimura , Atsuo Suga , Shigemitsu Higuchi , Tomohide Sorihashi
IPC分类号： H04N9/797 , H04N9/804 , H04N5/92
CPC分类号： H04N9/8047 , H04N9/7973
摘要： A digital processing unit for converting a digital picture signal into data by blocks and for correction encoding a variable-length encoded signal. This digital processing unit includes a digital data compressing section for dividing a picture signal into a plurality of number of blocks, and compressingly outputting digital data of this picture signal based on a processing unit of one or a few blocks, a buffer section for sequentially storing the digital data, and an error correction encoding section for sequentially reading the digital data from this buffer section, and structuring an inner code for each inner block structured by this digital data and structuring an outer code for each predetermined unit of inner blocks, to thereby structure two-dimensional error correction code blocks, to output an error correction code signal. Further, the error correction encoding section has the length of the digital data of the picture signal included in the inner code set to be equal to or larger than a mean code length of predetermined compressed blocks.
摘要翻译：一种数字处理单元，用于将数字图像信号转换成数据块并用于对可变长度编码信号进行校正编码。该数字处理单元包括数字数据压缩部分，用于将图像信号分成多个块，并且基于一个或几个块的处理单元压缩输出该图像信号的数字数据;缓冲部分，用于顺序存储数字数据和纠错编码部分，用于从该缓冲器部分顺序读取数字数据，并且构造由该数字数据构成的每个内部块的内部代码，并为每个内部块的每个预定单位构成外部代码，由此结构二维纠错码块，输出纠错码信号。此外，纠错编码部分将内部码中包括的图像信号的数字数据的长度设置为等于或大于预定压缩块的平均码长。

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