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    Method and apparatus for encoding a digital video signal
    13.
    发明授权
    Method and apparatus for encoding a digital video signal 失效
    用于对数字视频信号进行编码的方法和装置

    公开(公告)号：US5745644A

    公开(公告)日：1998-04-28

    申请号：US967015

    申请日：1992-10-27

    申请人： Naofumi Yanagihara ,  Masaki Oguro

    发明人： Naofumi Yanagihara ,  Masaki Oguro

    IPC分类号： H04N5/92 ,  H04N5/926 ,  H04N9/804 ,  H04N9/808 ,  H04N11/04 ,  H04N19/126 ,  H04N19/149 ,  H04N19/174 ,  H04N19/186 ,  H04N19/423 ,  H04N19/46 ,  H04N19/59 ,  H04N19/60 ,  H04N19/625 ,  H04N19/65 ,  H04N19/66 ,  H04N19/70 ,  H04N19/85 ,  H04N19/88 ,  H04N19/91 ,  H04N5/917 ,  H04N11/02

    CPC分类号： H04N5/9264 ,  H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/192 ,  H04N19/46 ,  H04N19/59 ,  H04N19/60 ,  H04N19/88 ,  H04N9/804 ,  H04N19/13 ,  H04N19/146 ,  H04N19/65 ,  H04N19/91

    摘要： Methods and apparatus are provided for encoding a digital video signal provided as a plurality of blocks of video data. The video data in block form are subjected to discrete cosine transformation to yield respective DC components and respective pluralities of AC components. The plurality of AC components are variable length encoded and, in certain embodiments, the DC components and variable-length encoded AC components of each block are arranged in a data stream so that the DC components precede the variable-length encoded AC components and relatively lower frequency variable length encoded AC components precede relatively higher frequency ones thereof. Error correction codes for the transformed data also are supplied. In certain embodiments of the invention, the transformed video data are arranged as a sequence of fixed length symbols so that the beginning of each of a plurality of blocks of transformed data corresponds with the beginning of a respective symbol within the sequence. In addition, an address indicating the position of a subsequent block is included within the sequence in association with a preceding block.

    摘要翻译： 提供了用于对作为多个视频数据块提供的数字视频信号进行编码的方法和装置。 以块形式的视频数据进行离散余弦变换以产生相应的DC分量和相应的多个AC分量。 多个AC分量是可变长度编码的，并且在某些实施例中，每个块的DC分量和可变长度编码的AC分量被布置在数据流中，使得DC分量在可变长度编码的AC分量之前，并且相对较低 频率可变长度编码的AC分量先于其相对较高的频率。 还提供了变换数据的纠错码。 在本发明的某些实施例中，经变换的视频数据被排列成固定长度符号的序列，使得多个变换数据块中的每一个的开始对应于序列内相应符号的开头。 此外，指示后续块的位置的地址与前一块相关联地包括在该序列内。

    Method and apparatus for encoding a digital image signal
    14.
    发明授权
    Method and apparatus for encoding a digital image signal 失效
    用于对数字图像信号进行编码的方法和装置

    公开(公告)号：US5699475A

    公开(公告)日：1997-12-16

    申请号：US012480

    申请日：1993-02-02

    申请人： Masaki Oguro ,  Naofumi Yanagihara

    发明人： Masaki Oguro ,  Naofumi Yanagihara

    IPC分类号： G06T9/00 ,  H04N5/783 ,  H04N7/52 ,  H04N9/804 ,  H04N11/04 ,  H04N19/126 ,  H04N19/136 ,  H04N19/14 ,  H04N19/149 ,  H04N19/174 ,  H04N19/186 ,  H04N19/189 ,  H04N19/196 ,  H04N19/423 ,  H04N19/46 ,  H04N19/60 ,  H04N19/625 ,  H04N19/65 ,  H04N19/70 ,  H04N19/85 ,  H04N19/88 ,  H04N19/89 ,  H04N19/91 ,  H04N19/93 ,  H04N5/917 ,  H04N7/26

    CPC分类号： H04N9/8047 ,  H04N11/044 ,  H04N19/124 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/89 ,  H04N21/236 ,  H04N21/434 ,  H04N19/146 ,  H04N5/783

    摘要： A digital image signal is encoded for recording by placing in a sync block approximately an integer number of macro blocks representing orthogonally transformed image data for a certain portion of the image. When a sync block is reproduced at high speed, the reproduced data therein corresponds to a displayable portion of the image including DC components and both low and high frequency AC components. Also, each sync block contains fixed length areas for the orthogonal transform coefficient data according to the 4:1:1 (or 4:2:0) format in which four blocks of luminance coefficients and two blocks of color difference coefficients represent a certain portion of an image, and also contains at least one fixed length overflow area for the high frequency coefficients which exceed the capacity of the fixed length coefficient areas. An error in the low frequency coefficients in the fixed length areas does not harm the high frequency coefficients since they are in separately addressed areas. Before a set of macro blocks is compressed into variable length encoded data, with the amount of encoded data for each set being kept within a target value so as to fit into fixed length recording tracks, the macro blocks are shuffled so that the central portions of an image are at the beginning of the set for reducing the noticeability of errors in a reproduced image.

    摘要翻译： 将数字图像信号编码用于通过在同步块中放置大约整数个表示用于图像的特定部分的正交变换的图像数据的宏块来进行记录。 当以高速再现同步块时，其中的再现数据对应于包括DC分量和低频和高频AC分量的图像的可显示部分。 此外，每个同步块根据4：1：1（或4：2：0）格式的正交变换系数数据的固定长度区域，其中四个亮度系数块和两个色差系数块表示某一部分 并且还包含超过固定长度系数区域的容量的高频系数的至少一个固定长度的溢出区域。 固定长度区域中的低频系数的误差不会对高频系数造成损害，因为它们处于单独寻址的区域。 在将一组宏块压缩成可变长度编码数据之前，将每组的编码数据量保持在目标值内，以便适合于固定长度的记录轨道，这些宏块被混洗，使得中心部分 该图像位于该集合的开头，用于减少再现图像中的错误的可察觉性。

    Apparatus for magnetically recording digital data
    15.
    发明授权
    Apparatus for magnetically recording digital data 失效
    用于磁记录数字数据的装置

    公开(公告)号：US5416651A

    公开(公告)日：1995-05-16

    申请号：US785413

    申请日：1991-10-30

    申请人： Akihiro Uetake ,  Naofumi Yanagihara ,  Keiji Kanota

    发明人： Akihiro Uetake ,  Naofumi Yanagihara ,  Keiji Kanota

    IPC分类号： G11B5/008 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/73 ,  G11B5/85 ,  G11B20/00 ,  G11B20/14 ,  G11B20/18 ,  H04N5/782 ,  H04N5/7826 ,  H04N5/926 ,  H04N7/26 ,  H04N9/804 ,  H04N9/806 ,  G11B5/02 ,  G11B5/58 ,  H04N5/78

    CPC分类号： H04N9/8063 ,  G11B20/00007 ,  G11B20/1426 ,  G11B20/1813 ,  G11B20/1833 ,  G11B5/0086 ,  G11B5/09 ,  G11B5/187 ,  G11B5/21 ,  G11B5/85 ,  H04N19/98 ,  H04N5/782 ,  H04N5/9261 ,  H04N9/8042 ,  H04N9/806 ,  H04N5/78263 ,  H04N9/8047

    摘要： A digital VTR is provided with a block segmenting circuit for converting an input digital picture signal into data segmented into blocks of picture elements, an encoding circuit for compressing and encoding the output data of the block segmenting circuit block-by-block, a channel encoding circuit for channel encoding the encoded output data from the encoding circuit, an audio signal encoding circuit for encoding an input digital audio signal, and an additional code generating circuit for generating an additional control code which includes subdata. The encoded picture data from the channel encoding circuit, the encoded audio data output from the audio signal encoding circuit, the additional control code and pilot signal data for tracking are recorded in skewed tracks traced on a magnetic tape by a magnetic head or heads mounted on a rotary drum, with each skewed track having pilot signal data recorded at least adjacent the end portion of the track at which the magnetic head enters into contract with such track, subdata recorded at the other end portion at which the magnetic head leaves the track, and the picture data and the audio data recorded at an intermediate portion of the track, so that both picture data and audio data can be reproduced with high quality while the subdata can be played back with relatively high accuracy.

    摘要翻译： 数字VTR设置有块分割电路，用于将输入数字图像信号转换成分割成图像元素的数据，用于逐块压缩和编码块分割电路的输出数据的编码电路，信道编码 用于对来自编码电路的编码输出数据进行信道编码的电路，用于对输入数字音频信号进行编码的音频信号编码电路，以及用于生成包括子数据的附加控制码的附加码产生电路。 来自频道编码电路的编码图像数据，从音频信号编码电路输出的编码音频数据，附加控制代码和用于跟踪的导频信号数据被记录在磁头上的歪斜轨道上，磁头或磁头安装在 旋转滚筒，其中每个歪斜轨迹具有至少邻近轨道的端部处记录的导频信号数据，在该端部处，磁头与磁头离开轨道的另一端部处记录的这种磁道进行收缩， 以及记录在轨道的中间部分的图像数据和音频数据，使得可以以高质量再现图像数据和音频数据，同时可以以相对高的精度回放子数据。

    Digital high-definition video signal recording and reproducing apparatus
    16.
    发明授权
    Digital high-definition video signal recording and reproducing apparatus 失效
    数字高清视频信号记录和再现设备

    公开(公告)号：US5317413A

    公开(公告)日：1994-05-31

    申请号：US971061

    申请日：1992-11-03

    申请人： Naofumi Yanagihara

    发明人： Naofumi Yanagihara

    IPC分类号： G11B20/10 ,  G11B20/12 ,  H04N5/917 ,  H04N5/92 ,  H04N5/926 ,  H04N7/58 ,  H04N9/79 ,  H04N5/76 ,  H04N5/782

    CPC分类号： H04N21/2365 ,  H04N21/4347 ,  H04N5/917 ,  H04N5/9264 ,  H04N9/7925

    摘要： A high-definition signal (HD) is separated to prevent the quality of an image from being deteriorated when the high-definition signal is mixed with a standard video signal. A low band signal of the HD signal from a decimation circuit (5) is supplied through a discrete cosine transform circuit (7), a quantizer circuit (8), a variable length coder circuit (9) and an encoder circuit (11) to a recording head (12). A signal from the quantizer circuit (8) is supplied through an inverse quantizer circuit (17) to a subtracter circuit (18). A signal from the discrete cosine transform circuit (7) is supplied to the subtracter circuit (18), thereby forming a difference signal between a decoded signal of the compresses signal and the original signal. This difference signal is supplied through a quantizer circuit (19) a run length coding circuit (20) and a variable length coder circuit (21) to an adder circuit (16). A high band signal of the HD signal from the decimation circuit (6) is supplied through a quantizer circuit (13), a run length coder circuit (14) and a variable length coder circuit (15) to the adder circuit (16). Then, a signal from the adder circuit (16) is supplied through an encoder circuit 22 to a recording head 23.

    摘要翻译： 分离高清晰度信号（HD）以防止当高分辨率信号与标准视频信号混合时图像的质量恶化。 来自抽取电路（5）的HD信号的低频信号通过离散余弦变换电路（7），量化器电路（8），可变长度编码器电路（9）和编码器电路（11）提供给 一个记录头（12）。 来自量化器电路（8）的信号通过逆量化器电路（17）提供给减法器电路（18）。 来自离散余弦变换电路（7）的信号被提供给减法器电路（18），从而在压缩信号的解码信号和原始信号之间形成差分信号。 该差分信号通过量化器电路（19）将游程长度编码电路（20）和可变长度编码器电路（21）提供给加法器电路（16）。 来自抽取电路（6）的HD信号的高频带信号通过量化器电路（13），游程长度编码器电路（14）和可变长度编码器电路（15）提供给加法器电路（16）。 然后，来自加法器电路（16）的信号通过编码器电路22提供给记录头23。

    Tracking method for digital signal reproducing apparatus
    17.
    发明授权
    Tracking method for digital signal reproducing apparatus 失效
    数字信号再现设备的跟踪方法

    公开(公告)号：US5095394A

    公开(公告)日：1992-03-10

    申请号：US467526

    申请日：1990-01-19

    申请人： Naofumi Yanagihara

    发明人： Naofumi Yanagihara

    IPC分类号： G11B15/467 ,  G11B21/10

    CPC分类号： G11B15/4677 ,  G11B21/103 ,  G11B21/106

    摘要： Tracking control signals are produced in response to the scanning of data tracks on a record medium, with at least alternate ones of those tracks containing tracking information signals recorded in predetermined areas. The tracks are scanned by a transducer arrangement comprised of first and second heads offset from each other in a direction substantially transverse of the tracks and displaced from each other in a direction substantially parallel to those tracks, such that the first and second heads scan two tracks concurrently over the major portion of a scanning trace of each head. Tracking information signals picked up by the first and second heads during a scanning trace are detected; and a tracking control signal indicative of a tracking error relative to the tracks being scanned is produced in response to those tracking information signals picked up by the two heads.

    Digital signal conversion method and digital signal conversion device
    18.
    发明授权
    Digital signal conversion method and digital signal conversion device 失效
    数字信号转换方法和数字信号转换装置

    公开(公告)号：US07526030B2

    公开(公告)日：2009-04-28

    申请号：US11818036

    申请日：2007-06-13

    申请人： Naofumi Yanagihara ,  Nobuaki Izumi

    发明人： Naofumi Yanagihara ,  Nobuaki Izumi

    IPC分类号： H04B1/66

    CPC分类号： H04N19/59 ,  H04N19/107 ,  H04N19/122 ,  H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/137 ,  H04N19/152 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/197 ,  H04N19/40 ,  H04N19/46 ,  H04N19/48 ,  H04N19/547 ,  H04N19/56 ,  H04N19/57 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

    摘要： An inputted digital signal of a first format (DV video signal) is restored to a variable-length code by having its framing cancelled by a de-framing section 11, then decoded by a variable-length decoding (VLD) section 12, inversely quantized by an inverse quantizing (IQ) section 13, and inversely weighted by an inverse weighting (IW) section 14. Then, required resolution conversion in the orthogonal transform domain (frequency domain) is carried out on the inversely weighted video signal by a resolution converting section 16. After that, the video signal having the resolution converted is weighted by a weighting (W) section 18, then quantized by a quantizing (Q) section 19, coded by variable-length coding by a variable-length coding (VLC) section 20, and outputted as a digital signal of a second format (MPEG video signal).

    摘要翻译： 将第一格式（DV视频信号）的输入数字信号通过由去帧部分11消除其成帧而被恢复为可变长度码，然后由可变长度解码（VLD）部分12解码，反量化 通过逆量化（IQ）部分13，并通过逆加权（IW）部分14反相加权。然后，通过分辨率转换对反相加权的视频信号执行正交变换域（频域）中的所需分辨率转换 之后，通过加权（W）部分18对具有分辨率转换的视频信号进行加权，然后由可变长度编码（VLC）编码的量化（Q）部分19进行量化， 并作为第二格式（MPEG视频信号）的数字信号输出。

    Shutter time compensation
    19.
    发明申请
    Shutter time compensation 有权
    快门时间补偿

    公开(公告)号：US20080309778A1

    公开(公告)日：2008-12-18

    申请号：US11818673

    申请日：2007-06-15

    申请人： Ali Tabatabai ,  Chuen-Chien Lee ,  Mohammed Zubair Visharam ,  Naofumi Yanagihara ,  Yoichi Yagasaki ,  Teruhiko Suzuki ,  Liming Wang

    发明人： Ali Tabatabai ,  Chuen-Chien Lee ,  Mohammed Zubair Visharam ,  Naofumi Yanagihara ,  Yoichi Yagasaki ,  Teruhiko Suzuki ,  Liming Wang

    IPC分类号： H04N5/228 ,  H04N5/00

    CPC分类号： H04N5/232 ,  H04N5/2258 ,  H04N5/23245 ,  H04N5/2628

    摘要： A hybrid imaging device is configured to capture low resolution video and high resolution still images. The imaging device is configured to apply motion information obtained from the low resolution video to a reference high resolution still image to generate a missing moment of interest high resolution still image. The low-resolution video is captured at a high frame rate in conjunction with a few high-resolution still pictures taken at periodic intervals. A user locates a desired scene of interest, e.g. a moment of interest, from the captured video, and a post-processing technique is used to generate the high resolution still picture corresponding to the selected moment of interest. The high resolution still image is generated using texture information from one or more nearby captured high resolution still images and motion information from the low-resolution video frame corresponding to the selected moment of interest.

    摘要翻译： 混合成像装置被配置为捕获低分辨率视频和高分辨率静止图像。 成像装置被配置为将从低分辨率视频获得的运动信息应用于参考高分辨率静止图像，以产生缺失的兴趣高分辨率静止图像。 低分辨率视频以高帧速率捕获，并结合以周期性间隔拍摄的几张高分辨率静态照片。 用户定位所期望的感兴趣的场景，例如， 利用拍摄视频的时刻和后处理技术来生成与所选择的兴趣时刻相对应的高分辨率静止图像。 使用来自一个或多个附近拍摄的高分辨率静止图像的纹理信息和来自对应于所选择的感兴趣时刻的低分辨率视频帧的运动信息来生成高分辨率静止图像。