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公开(公告)号：EP0705034A3
公开(公告)日：1997-04-02
申请号：EP95306767.5
申请日：1995-09-26
发明人： Yamauchi, Eiji , Hashimoto, Kiyokazu , Oka, Hidemi , Kashiro, Takao , Hidaka, Iwao , Yamamoto, Yoshiki
IPC分类号： H04N5/926
摘要： The digital processing apparatus (P1) includes a high speed response PLL (13) that produces a first clock signal (Sc1) locked on the horizontal synchronization signal (H. sync.) included in the video signal (Sv) input thereto. A analog to digital converter (19) converts the input video signal (Sv) with respect to the first clock signal (Sc1) into a digitized video signal (Svc). A write controller (7) controls a video memory (6) to store the digitized video signal (Svc) based on the first clock signal (Sc1). A low speed response PLL (15) produces a second clock signal (Sc2) based on the vertical synchronization signal (V. sync.) included in the video signal (Sv). A read controller (8) controls the video memory (6) to read out the stored digitized video signal (Svc) therefrom based on the second control signal (Sc2). In thus constructed digital processing apparatus (P1) can store and read the digitized video signal (Svc) to and from the video memory (6) stably, enabling to process the video signal (Svc) read out from the video memory (6) effectively and securely.
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公开(公告)号：EP0175275A2
公开(公告)日：1986-03-26
申请号：EP85111498.3
申请日：1985-09-11
摘要： (57) A non-linear signal processing apparatus used in a video tape recorder or a video disk player is disclosed. A time variation of an input signal or a processed version thereof is non-linearly processed by a differential circuit (19) and a closed loop including a non-linear circuit (22). The non-linearly processed time variation of the signal or a processed version thereof is arithmetically operated with the input signal. Thus, the same non-linear characteristic as that obtained by the prior art analog signal technique is attained by the digital signal processing technique which is superior in integrity and stability. By appropriately selecting the characteristic of the non-linear circuit, higher effect than obtainable by the analog signal processing technique is achieved.
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公开(公告)号：EP0677841B1
公开(公告)日：2001-06-20
申请号：EP94302617.9
申请日：1994-04-13
发明人： Honjo, Kenichi , Maruoka, Toshihiko , Isaka, Haruo , Gotou, Makoto , Ichikawa, Kei , Hashimoto, Kiyokazu , Shimotashiro, Masafumi
IPC分类号： G11B15/18 , G11B15/467 , G11B15/087 , G11B15/12
CPC分类号： G11B15/087 , G11B15/125 , G11B15/1875 , G11B15/4678
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4.发明授权Tracking error detecting circuit of magnetic recording and reproducing apparatus 失效磁记录和重放装置中的跟踪误差检测电路
公开(公告)号：EP0499238B1
公开(公告)日：1996-12-11
申请号：EP92102345.3
申请日：1992-02-12
发明人： Shimotashiro, Masafumi , Hashimoto, Kiyokazu , Gotou, Makoto , Isaka, Haruo , Ichikawa, Kei , Honjo, Kenichi , Takeuchi, Akihiro , Sakakibara, Yoshio
IPC分类号： G11B5/584
CPC分类号： G11B5/5922
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公开(公告)号：EP0677841A1
公开(公告)日：1995-10-18
申请号：EP94302617.9
申请日：1994-04-13
发明人： Honjo, Kenichi , Maruoka, Toshihiko , Isaka, Haruo , Gotou, Makoto , Ichikawa, Kei , Hashimoto, Kiyokazu , Shimotashiro, Masafumi
IPC分类号： G11B15/18 , G11B15/467 , G11B15/087 , G11B15/12
CPC分类号： G11B15/087 , G11B15/125 , G11B15/1875 , G11B15/4678
摘要： A magnetic recording and reproducing apparatus comprises a recorder for recording information signals so as to form tracks obliquely on a magnetic tape, and recording pilot signals so that the frequency may differ between different modes such as SP and LP, a reproducing head for reproducing recorded information, an error detecting circuit for comparing the level difference of pilot signals recorded in both tracks adjacent to the track to be scanned by the reproducing head and issuing a tracking error signal, and a controller for controlling the feed of the magnetic tape so that the tracking error signal may be balanced. Preferably, in LP mode, pilot signal of higher frequency than in SP mode is recorded. In a tracking error detector for magnetic recording and reproducing apparatus for detecting pilot signal, reproduced signals are sampled at a frequency at a common multiple of each pilot frequency, a pilot signal is detected, and a tracking error signal is issued.
摘要翻译： 一种磁记录和再现设备包括：记录器，用于记录信息信号以便在磁带上倾斜地形成磁道，并记录导频信号，使得频率可以在诸如SP和LP的不同模式之间不同;用于再现记录信息的再现磁头 ，一个误差检测电路，用于比较记录在与由再现磁头扫描的磁道相邻的两个磁道中的导频信号的电平差，并发出一个跟踪误差信号;以及一个控制器，用于控制磁带的馈送，使得跟踪 错误信号可能是平衡的。 优选地，在LP模式下，记录频率高于SP模式的导频信号。 在用于检测导频信号的磁记录和再现设备的跟踪误差检测器中，以每个导频的公倍数的频率对再现信号进行采样，检测导频信号并发出跟踪误差信号。
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公开(公告)号：EP0705034A2
公开(公告)日：1996-04-03
申请号：EP95306767.5
申请日：1995-09-26
发明人： Yamauchi, Eiji , Hashimoto, Kiyokazu , Oka, Hidemi , Kashiro, Takao , Hidaka, Iwao , Yamamoto, Yoshiki
IPC分类号： H04N5/926
摘要： The digital processing apparatus (P1) includes a high speed response PLL (13) that produces a first clock signal (Sc1) locked on the horizontal synchronization signal (H. sync.) included in the video signal (Sv) input thereto. A analog to digital converter (19) converts the input video signal (Sv) with respect to the first clock signal (Sc1) into a digitized video signal (Svc). A write controller (7) controls a video memory (6) to store the digitized video signal (Svc) based on the first clock signal (Sc1). A low speed response PLL (15) produces a second clock signal (Sc2) based on the vertical synchronization signal (V. sync.) included in the video signal (Sv). A read controller (8) controls the video memory (6) to read out the stored digitized video signal (Svc) therefrom based on the second control signal (Sc2). In thus constructed digital processing apparatus (P1) can store and read the digitized video signal (Svc) to and from the video memory (6) stably, enabling to process the video signal (Svc) read out from the video memory (6) effectively and securely.
摘要翻译： 数字处理装置（P1）包括产生锁定在输入到其中的视频信号（Sv）中所包括的水平同步信号（H sync）的第一时钟信号（Sc1）的高速响应PLL（13）。 模数转换器（19）将输入视频信号（Sv）相对于第一时钟信号（Sc1）转换为数字化视频信号（Svc）。 写控制器（7）基于第一时钟信号（Sc1）控制视频存储器（6）存储数字化视频信号（Svc）。 低速响应PLL（15）基于包括在视频信号（Sv）中的垂直同步信号（V. sync）产生第二时钟信号（Sc2）。 读取控制器（8）基于第二控制信号（Sc2）控制视频存储器（6）从其读出存储的数字化视频信号（Svc）。 在这样构成的数字处理装置（P1）中，可以稳定地存储和读出数字化视频信号（Svc），从而可以有效地处理从视频存储器（6）读出的视频信号（Svc） 并牢固地。
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7.发明公开Tracking error detecting circuit of magnetic recording and reproducing apparatus 失效检测磁记录和重现装置的检测电路错误
公开(公告)号：EP0499238A3
公开(公告)日：1993-01-13
申请号：EP92102345.3
申请日：1992-02-12
发明人： Shimotashiro, Masafumi , Hashimoto, Kiyokazu , Gotou, Makoto , Isaka, Haruo , Ichikawa, Kei , Honjo, Kenichi , Takeuchi, Akihiro , Sakakibara, Yoshio
IPC分类号： G11B5/584
CPC分类号： G11B5/5922
摘要： A tracking error detecting circuit in which tracking error detecting pilot signals having different frequencies are added to a main signal every track and recorded onto a magnetic recording medium, and upon reproduction, reproduction output levels of the pilot signals reproduced as crosstalks from both of adjacent tracks are compared, and a tracking error is detected. n signals having the same frequencies as those of the pilot signals and whose phases are different are generated and multiplied to the reproduction signal. Unnecessary components are eliminated by n LPFs. The amplitude values of the reproduced pilot signals are vector separated and detected. Further, the vector separated amplitude values are vector synthesized and detected. Therefore, by multiplying the signals having the same frequencies as those of the pilot signals, the synchronous detection is performed. The influence due to the undetected pilot phases is solved by detecting by performing the vector separation and synthesis. Therefore, the amplitude values can be certainly detected by the synchronous detection. The S/N ratio of the reproduction pilot signals can be determined by the LPFs. Even in the case of a bad transmission S/N ratio of the reproduction pilot signals which could not be coped by the conventional construction, the amplitude values can be certainly detected.
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8.发明公开Tracking error detecting circuit of magnetic recording and reproducing apparatus 失效Aufzeichnungs- undWiedergabegerät，Spurfolgefehlerdetektionsschaltungfürmagnetisches Aufzeichnungs- undWiedergabegerät。
公开(公告)号：EP0499238A2
公开(公告)日：1992-08-19
申请号：EP92102345.3
申请日：1992-02-12
发明人： Shimotashiro, Masafumi , Hashimoto, Kiyokazu , Gotou, Makoto , Isaka, Haruo , Ichikawa, Kei , Honjo, Kenichi , Takeuchi, Akihiro , Sakakibara, Yoshio
IPC分类号： G11B5/584
CPC分类号： G11B5/5922
摘要： A tracking error detecting circuit in which tracking error detecting pilot signals having different frequencies are added to a main signal every track and recorded onto a magnetic recording medium, and upon reproduction, reproduction output levels of the pilot signals reproduced as crosstalks from both of adjacent tracks are compared, and a tracking error is detected. n signals having the same frequencies as those of the pilot signals and whose phases are different are generated and multiplied to the reproduction signal. Unnecessary components are eliminated by n LPFs. The amplitude values of the reproduced pilot signals are vector separated and detected. Further, the vector separated amplitude values are vector synthesized and detected. Therefore, by multiplying the signals having the same frequencies as those of the pilot signals, the synchronous detection is performed. The influence due to the undetected pilot phases is solved by detecting by performing the vector separation and synthesis. Therefore, the amplitude values can be certainly detected by the synchronous detection. The S/N ratio of the reproduction pilot signals can be determined by the LPFs. Even in the case of a bad transmission S/N ratio of the reproduction pilot signals which could not be coped by the conventional construction, the amplitude values can be certainly detected.
摘要翻译： 一种跟踪误差检测电路，其中具有不同频率的跟踪误差检测导频信号被添加到每个磁道的主信号并记录在磁记录介质上，并且在再现时，作为来自两个相邻轨道的串扰再现的导频信号的再现输出电平 进行比较，并检测到跟踪误差。 产生具有与导频信号相同频率且相位不同的n个信号，并将其乘以再现信号。 不必要的组件由n个LPF消除。 再现的导频信号的振幅值被矢量分离和检测。 此外，矢量分离的振幅值是矢量合成和检测的。 因此，通过将具有与导频信号相同的频率的信号相乘，进行同步检测。 通过执行向量分离和合成的检测来解决由于未检测到的导频相的影响。 因此，可以通过同步检测肯定地检测振幅值。 再现导频信号的S / N比可以由LPF确定。 即使在传统结构无法应付的再现导频信号的传输S / N比差的情况下，也可以肯定地检测振幅值。
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公开(公告)号：EP0175275B1
公开(公告)日：1989-11-29
申请号：EP85111498.3
申请日：1985-09-11
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