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    Optical disk having a continuous information track formed of alternating land and groove track revolutions and a method of tracking the optical disk
    21.
    发明授权
    Optical disk having a continuous information track formed of alternating land and groove track revolutions and a method of tracking the optical disk 失效
    具有由交替的槽脊和槽轨道转数形成的连续信息轨道的光盘和跟踪光盘的方法

    公开(公告)号：US5946285A

    公开(公告)日：1999-08-31

    申请号：US808534

    申请日：1997-02-28

    申请人： Kazuhiko Nakane ,  Masato Nagasawa ,  Hiroyuki Ohata ,  Masayoshi Shimamoto ,  Kouichi Komawaki ,  Kenji Gotoh ,  Yoshinobu Ishida

    发明人： Kazuhiko Nakane ,  Masato Nagasawa ,  Hiroyuki Ohata ,  Masayoshi Shimamoto ,  Kouichi Komawaki ,  Kenji Gotoh ,  Yoshinobu Ishida

    IPC分类号： G11B20/12 ,  G11B7/007 ,  G11B7/09 ,  G11B7/08

    CPC分类号： G11B7/00745 ,  G11B7/00718 ,  G11B7/0901 ,  G11B7/0938

    摘要： In optical disk having a track formed of groove tracks and land tracks connected every revolution to form a single spiral, each revolution-of the tracks is divided into sectors, each having identification signal region at the head of the sector, and the identification signal regions in tracks adjacent to each other are aligned in the radial direction. Prepits are formed in the identification signal region, on an extension of a boundary between groove and land tracks adjacent to each other. The prepits have a width substantially equal to the width of the grooves. The identification signal including address information of the sector. The polarity of tracking error signal is detected at the identification signal region of the recording sector, and whether the recording sector is in a groove track or land track is determined based on the polarity of tracking error signal. The identification signal may include information concerning the timing for switching tracking polarity in accordance with whether groove or land sector is being scanned.

    摘要翻译： 在具有由每转一次连接的沟槽轨道和脊迹道形成的轨道形成单个螺旋的光盘中，轨道的每转都被划分成扇区，每个扇区在扇区的头部具有识别信号区域，并且识别信号区域 在彼此相邻的轨道中在径向方向上对齐。 在识别信号区域中，在彼此相邻的槽和焊盘轨迹之间的边界的延伸部上形成预浸料。 预凹坑的宽度基本上等于槽的宽度。 识别信号包括扇区的地址信息。 在记录扇区的识别信号区域处检测跟踪误差信号的极性，并且基于跟踪误差信号的极性来确定记录扇区是凹槽轨道还是槽脊轨道。 识别信号可以包括关于根据是否正在扫描凹槽或脊扇区的切换跟踪极性的定时的信息。

    Methods of efficiently recording and reproducing an audio signal in a memory using hierarchical encoding
    24.
    发明授权
    Methods of efficiently recording and reproducing an audio signal in a memory using hierarchical encoding 失效
    使用分层编码在存储器中有效地记录和再现音频信号的方法

    公开(公告)号：US5864801A

    公开(公告)日：1999-01-26

    申请号：US79219

    申请日：1998-05-15

    申请人： Kazuhiro Sugiyama ,  Yukari Ono ,  Yoshinobu Ishida

    发明人： Kazuhiro Sugiyama ,  Yukari Ono ,  Yoshinobu Ishida

    IPC分类号： G11C7/16 ,  G10L5/00

    CPC分类号： G11C7/16 ,  G11C2207/16

    摘要： An audio signal is recorded in a semiconductor memory in a plurality of hierarchical levels, with the lowest level sufficing for reproduction with a certain reduced degree of fidelity. Successfully higher hierarchical levels provide successively greater fidelity when reproduced. When the memory has been determined to have reached maximum capacity, recording continues by overwriting the highest hierarchical level of data currently stored in the memory with lower hierarchical levels of new data. A code is recorded in the memory, indicating the number of hierarchical levels recorded therein, for subsequent reproduction. The audio signal can furthermore be recorded in variable-length frames and reproduced at high speed by reading every N-th frame, N being a positive integer, or by reading only frames having at least a certain minimum length.

    摘要翻译： 音频信号被记录在多个层次级的半导体存储器中，其中最低的电平足以以一定的降低的保真度再现。 成功获得更高级别的级别在再现时提供连续更高的保真度。 当存储器已经被确定为已经达到最大容量时，通过用新数据的较低层次级别覆盖当前存储在存储器中的数据的最高层级来继续记录。 代码被记录在存储器中，指示其中记录的分层级数，用于随后的再现。 此外，音频信号可以以可变长度的帧记录，并且通过读取每N个帧，N是正整数，或通过仅读取具有至少一定的最小长度的帧，以高速再现。

    Methods of efficiently recording an audio signal in semiconductor memory
    25.
    发明授权
    Methods of efficiently recording an audio signal in semiconductor memory 失效

    公开(公告)号：US5774843A

    公开(公告)日：1998-06-30

    申请号：US671640

    申请日：1996-06-28

    申请人： Kazuhiro Sugiyama ,  Yukari Ono ,  Yoshinobu Ishida

    发明人： Kazuhiro Sugiyama ,  Yukari Ono ,  Yoshinobu Ishida

    IPC分类号： G11C7/16 ,  G10L5/00

    CPC分类号： G11C7/16 ,  G11C2207/16

    摘要： An audio signal is recorded in a semiconductor memory in a plurality of hierarchical levels, with the lowest level being adequate for reproduction with a certain reduced degree of fidelity. Successively higher hierarchial levels provide successively greater fidelity when reproduced. When the memory has been determined to have reached maximum capacity, recording continues by overwriting the highest hierarchical level of data currently stored in the memory with lower hierarchical levels of new data. A code is recorded in the memory, indicating the number of hierarchical levels recorded therein, for subsequent reproduction. The audio signal can furthermore be recorded in variable-length frames and reproduced at high speed by reading every N-th frame, N being a positive integer, or by reading only frames having at least a certain minimum length.

    Method of efficiently recording an audio signal in semiconductor memory
    26.
    发明授权
    Method of efficiently recording an audio signal in semiconductor memory 失效
    在半导体存储器中高效地记录音频信号的方法

    公开(公告)号：US5752221A

    公开(公告)日：1998-05-12

    申请号：US716566

    申请日：1996-09-18

    申请人： Kazuhiro Sugiyama ,  Yukari Ono ,  Yoshinobu Ishida

    发明人： Kazuhiro Sugiyama ,  Yukari Ono ,  Yoshinobu Ishida

    IPC分类号： G11C7/16 ,  G10L3/02 ,  G10L9/00

    CPC分类号： G11C7/16 ,  G11C2207/16

    摘要： An audio signal is recorded in a semiconductor memory in a plurality of hierarchical levels, with the lowest level sufficing for reproduction with a certain reduced degree of fidelity. Successively higher hierarchical levels provide successively greater fidelity when reproduced. When the memory has been determined to have reached maximum capacity recording continues by overwriting the highest hierarchical level of data currently stored in the memory with lower hierarchical levels of new data. A code is recorded in the memory, indicating the number of hierarchical levels recorded therein, for subsequent reproduction. The audio signal can furthermore be recorded in variable-length frames and reproduced at high speed by reading every N-th frame, N being a positive integer, or by reading only frames having at least a certain minimum length.

    摘要翻译： 音频信号被记录在多个层次级的半导体存储器中，其中最低的电平足以以一定的降低的保真度再现。 随着更高的层次级别在再现时提供连续更高的保真度。 当存储器已经被确定为达到最大容量记录时，通过用新数据的较低分层级覆盖当前存储在存储器中的数据的最高层级来继续。 代码被记录在存储器中，指示其中记录的分层级数，用于随后的再现。 此外，音频信号可以以可变长度的帧记录，并且通过读取每N个帧，N是正整数，或通过仅读取具有至少一定的最小长度的帧，以高速再现。

    Magnetic recorder/reproducer
    29.
    发明授权
    Magnetic recorder/reproducer 失效

    公开(公告)号：US4675754A

    公开(公告)日：1987-06-23

    申请号：US696051

    申请日：1985-01-29

    申请人： Kazuhito Endo ,  Masayuki Ishida ,  Yoshinobu Ishida

    发明人： Kazuhito Endo ,  Masayuki Ishida ,  Yoshinobu Ishida

    IPC分类号： G11B20/10 ,  G11B20/18 ,  G11B5/00 ,  G11B5/09 ,  H04N5/78

    CPC分类号： G11B20/1876 ,  G11B20/10527 ,  G11B20/1809

    摘要： A magnetic recorder/reproducer converts two-channel analog signals into digital signals by a sample-and-hold/A-D converter circuit (3) and controls addresses in a memory circuit (4) by a memory address control circuit (5), to distribute the digital signals into odd sample groups and even sample groups per each channel for arraying the odd sample groups and the even sample groups of the same channel in alternate scanning intervals, thereby to write the same in the memory circuit so that the odd samples and the even samples of the same channel are arrayed in positions separated from each other along the direction of scanning by rotary heads (10, 11). The digital signals thus permutated are modulated by a modulation circuit (7), to be recorded in a magnetic tape by the rotary heads. The digital signals reproduced by the rotary heads are demodulated by a demodulation circuit (14), to be stored in a memory circuit (15). A memory address control circuit (16) controls addresses so as to permute samples of the reproduced digital signals stored in the memory circuit to be in the original array thereof. The reproduced digital signals read from the memory circuit are converted into analog signals by a D-A converter (18), to be outputted through a low-pass filter (19).