公开(公告)号：US5712948A

公开(公告)日：1998-01-27

申请号：US396430

申请日：1995-02-28

申请人： Masako Yamada ,  Hideki Kaneko ,  Sadayuki Inoue ,  Ikuo Ohkuma

发明人： Masako Yamada ,  Hideki Kaneko ,  Sadayuki Inoue ,  Ikuo Ohkuma

IPC分类号： H04N5/781 ,  H04N5/92 ,  H04N5/926 ,  H04N5/932 ,  H09N5/928

CPC分类号： H04N5/9268 ,  H04N5/9203 ,  H04N5/932 ,  H04N5/781

摘要： A magnetic recording and reproducing apparatus wherein synchronizing separation of a reproduction video signal can be performed accurately and a stabilized reproduction video signal can be obtained. The magnetic recording and reproducing apparatus includes a switch device for selectively inserting, upon recording, a PCM modulated audio signal into a blanking period of an FM modulated video signal, a PCM region signal generator for identifying a region of a PCM modulated audio signal in a reproduction signal reproduced by a rotary head and generating a control signal representative of a PCM audio signal region, an FM demodulator for FM demodulating a reproduction signal from the rotary head into a reproduction FM demodulation signal, and a clip circuit for clipping a lower end portion of a PCM audio signal region of a reproduction FM demodulation signal from the FM demodulator in accordance with a control signal generated from the PCM region signal generator.

摘要翻译： 可以精确地执行再现视频信号的同步分离的磁记录和再现装置，并且可以获得稳定的再现视频信号。 磁记录和重放装置包括一个开关装置，用于在记录PCM调制音频信号到FM调制视频信号的消​​隐期后有选择地插入PCM区域信号发生器，用于识别PCM调制音频信号的区域 由旋转磁头重放并产生代表PCM音频信号区域的控制信号的再现信号，用于将来自旋转磁头的再现信号FM解调成FM再现解调信号的FM解调器，以及用于限制下端部分的剪辑电路 根据从PCM区域信号发生器产生的控制信号，来自FM解调器的再现FM解调信号的PCM音频信号区域。

公开(公告)号：US5432649A

公开(公告)日：1995-07-11

申请号：US802741

申请日：1991-12-05

申请人： Masako Yamada ,  Hideki Kaneko ,  Sadayuki Inoue ,  Ikuo Ohkuma

发明人： Masako Yamada ,  Hideki Kaneko ,  Sadayuki Inoue ,  Ikuo Ohkuma

IPC分类号： H04N5/781 ,  H04N5/92 ,  H04N5/926 ,  H04N5/932 ,  G11B5/02

CPC分类号： H04N5/9268 ,  H04N5/9203 ,  H04N5/932 ,  H04N5/781

摘要： A magnetic recording and reproducing apparatus wherein synchronizing separation of a reproduction video signal can be performed accurately and a stabilized reproduction video signal can be obtained. The magnetic recording and reproducing apparatus includes a switch device for selectively inserting, upon recording, a PCM modulated audio signal into a blanking period of an FM modulated video signal, a PCM region signal generator for identifying a region of a PCM modulated audio signal in a reproduction signal reproduced by a rotary head and generating a control signal representative of a PCM audio signal region, an FM demodulator for FM demodulating a reproduction signal from the rotary head into a reproduction FM demodulation signal, and a clip circuit for clipping a lower end portion of a PCM audio signal region of a reproduction FM demodulation signal from the FM demodulator in accordance with a control signal generated from the PCM region signal generator.

摘要翻译： 可以精确地执行再现视频信号的同步分离的磁记录和再现装置，并且可以获得稳定的再现视频信号。 磁记录和重放装置包括一个开关装置，用于在记录PCM调制音频信号到FM调制视频信号的消​​隐期后有选择地插入PCM区域信号发生器，用于识别PCM调制音频信号的区域 由旋转磁头重放并产生代表PCM音频信号区域的控制信号的再现信号，用于将来自旋转磁头的再现信号FM解调成FM再现解调信号的FM解调器，以及用于限制下端部分的剪辑电路 根据从PCM区域信号发生器产生的控制信号，来自FM解调器的再现FM解调信号的PCM音频信号区域。

公开(公告)号：US5384665A

公开(公告)日：1995-01-24

申请号：US20325

申请日：1993-02-19

申请人： Ikuo Ohkuma ,  Makoto Kumano ,  Sadayuki Inoue ,  Ken Onishi ,  Junko Ishimoto

发明人： Ikuo Ohkuma ,  Makoto Kumano ,  Sadayuki Inoue ,  Ken Onishi ,  Junko Ishimoto

IPC分类号： G11B27/032 ,  G11B27/30 ,  H04N5/7826 ,  H04N7/26 ,  H04N7/30 ,  H04N9/797 ,  H04N9/804 ,  G11B5/02 ,  G11B5/00 ,  G11B5/09

CPC分类号： H04N9/8047 ,  G11B27/032 ,  G11B27/3063 ,  H04N19/124 ,  H04N19/152 ,  H04N19/187 ,  H04N19/37 ,  H04N19/60 ,  H04N19/13 ,  H04N19/146 ,  H04N19/30 ,  H04N19/91 ,  H04N5/78263 ,  H04N9/7973

摘要： Specified modular arithmetic is applied to input digital data to divide the input data into two main codes and a subcode. Otherwise, input digital data is divided into two pieces of digital data according to a specified rule. The digital data is divided so that the original input digital data can be completely restored if the two main codes and the subcode or both of the divided data are used, and the original input digital data can be nearly correctly restored even when one of the main codes or one of the divided data is used.

摘要翻译： 应用指定的模数运算来输入数字数据，将输入数据分成两个主要代码和一个子代码。 否则，输入数字数据按照规定被分成两部分数字数据。 数字数据被分割，使得如果使用两个主要代码和子代码或两个分割数据，则原始输入数字数据可以被完全恢复，并且即使当主要 代码或分割数据之一被使用。

公开(公告)号：US5845041A

公开(公告)日：1998-12-01

申请号：US327815

申请日：1994-10-17

申请人： Ikuo Ohkuma ,  Sadayuki Inoue ,  Tohru Inoue ,  Yoshinori Asamura ,  Kimitoshi Hongo

发明人： Ikuo Ohkuma ,  Sadayuki Inoue ,  Tohru Inoue ,  Yoshinori Asamura ,  Kimitoshi Hongo

IPC分类号： H04N5/7826 ,  H04N5/783 ,  H04N7/26 ,  H04N9/804 ,  H04N9/82 ,  H04N21/236 ,  H04N21/434 ,  H04N5/91 ,  H04N5/917

CPC分类号： H04N21/236 ,  H04N19/00 ,  H04N21/434 ,  H04N5/783 ,  H04N5/78266 ,  H04N9/8047 ,  H04N9/8227

摘要： A video signal recording and reproducing apparatus for recording a video signal whose information amount is compressed using a high-efficiency encoding employing an orthogonal transform, wherein encoded data obtained by encoding only low-frequency coefficients are recorded separately from normal encoded data. When the amount of information after compression falls short of a presdetermined amount available for recording, the encoded data of low-frequency coefficients are added to fill the vacancy. For the low-frequency coefficients, check words are appended that which provide a greater minimum distance compared with other coefficients. The low-frequency coefficients are doubly encoded for error-correction.

摘要翻译： 一种视频信号记录和再现装置，用于使用正交变换的高效率编码来记录其信息量被压缩的视频信号，其中通过仅对低频系数进行编码而获得的编码数据与正常编码数据分开记录。 当压缩后的信息量低于可用于记录的预定量时，添加低频系数的编码数据以填充空位。 对于低频系数，检查与其他系数相比提供更大最小距离的字。 低频系数被双重编码用于纠错。

公开(公告)号：US5574570A

公开(公告)日：1996-11-12

申请号：US057774

申请日：1993-05-06

申请人： Ikuo Ohkuma ,  Makoto Kumano ,  Kihei Ido ,  Ken Onishi

发明人： Ikuo Ohkuma ,  Makoto Kumano ,  Kihei Ido ,  Ken Onishi

IPC分类号： G11B20/18 ,  G11B27/032 ,  G11B27/036 ,  G11B27/30 ,  H03M13/35 ,  H04N9/804 ,  H04N9/806 ,  H04N9/82 ,  H04N9/888 ,  H04N5/76 ,  G11B5/02 ,  H04N5/91

CPC分类号： G11B27/3027 ,  G11B20/1813 ,  G11B27/036 ,  H03M13/35 ,  H04N9/8042 ,  H04N9/8066 ,  H04N9/8227 ,  H04N9/888 ,  G11B2220/90 ,  G11B27/032

摘要： When recording HD video signals, twice the number of tracks are used as compared to recording the conventional NTSC video signals, and video signals are recorded in the audio sector. HD video signals are encoded with the same number of checks as the error-correcting code of the present video signals, with the number of information symbols being increased. When recording HD video signals and present video signals, these signals are encoded so that the shortest recording wavelength is the same with either signal.

摘要翻译： 当记录高清视频信号时，与记录常规NTSC视频信号相比，使用两倍数量的磁道，并且视频信号被记录在音频扇区中。 HD视频信号用与当前视频信号的纠错码相同数量的检查进行编码，信息符号数量增加。 当记录HD视频信号并呈现视频信号时，对这些信号进行编码，使得最短记录波长与任一信号相同。