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    Digital signal conversion method and digital signal conversion device
    32.
    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：US07227898B2

    公开(公告)日：2007-06-05

    申请号：US11081208

    申请日：2005-03-16

    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，并通过反向加权（IW）部分14反相加权。 然后，通过分辨率转换部分16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）部分20通过可变长度编码编码的量化（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。

    Picture information conversion method and apparatus
    35.
    发明授权
    Picture information conversion method and apparatus 失效
    图片信息转换方法和装置

    公开(公告)号：US06714592B1

    公开(公告)日：2004-03-30

    申请号：US09711331

    申请日：2000-11-13

    申请人： Yu Liu ,  Naofumi Yanagihara ,  Kazushi Sato ,  Takeshi Kubozono ,  Shintaro Okada

    发明人： Yu Liu ,  Naofumi Yanagihara ,  Kazushi Sato ,  Takeshi Kubozono ,  Shintaro Okada

    IPC分类号： H04N712

    CPC分类号： H04N19/40 ,  H04N19/124 ,  H04N19/149 ,  H04N19/152 ,  H04N19/177 ,  H04N19/61

    摘要： A picture information conversion method and apparatus in which, if the compressed picture information with a variable or non-recognized information volume is input, optimum compression processing on the compressed picture information is performed to prevent underflow and/or overflow to suppress deterioration of the picture quality. A compressed information analysis device 3 analyzes the structure of the picture type of the GOP of the compressed picture information input to the FF buffer 2. A bit allocation device 5 generates a pseudo GOP of the input compressed picture information, based on N frames stored in the FF buffer 2 and on the analysis result information stored in the information buffer 4, and allocates a pre-set code volume to respective pictures of the generated GOP so that the output compressed picture information will be at a second bitrate.

    摘要翻译： 一种图像信息转换方法和装置，其中如果输入具有可变或未识别的信息量的压缩图像信息，则执行对压缩图像信息的最佳压缩处理以防止下溢和/或溢出以抑制图像的劣化 质量。 压缩信息分析装置3分析输入到FF缓冲器2的压缩图像信息的GOP的图像类型的结构。比特分配装置5基于存储在N帧中的N个帧来生成输入的压缩图像信息的伪GOP FF缓冲器2和存储在信息缓冲器4中的分析结果信息，并且将所预定的代码量分配给生成的GOP的各个图像，使得输出的压缩图像信息将处于第二位速率。

    Picture decoding method and apparatus
    36.
    发明授权
    Picture decoding method and apparatus 失效
    图像解码方法及装置

    公开(公告)号：US06580830B1

    公开(公告)日：2003-06-17

    申请号：US09358032

    申请日：1999-07-21

    申请人： Kazushi Sato ,  Kenji Komori ,  Tetsuo Kaneko ,  Satoshi Mitsuhashi ,  Masami Goseki ,  Naofumi Yanagihara

    发明人： Kazushi Sato ,  Kenji Komori ,  Tetsuo Kaneko ,  Satoshi Mitsuhashi ,  Masami Goseki ,  Naofumi Yanagihara

    IPC分类号： G06K936

    CPC分类号： H04N7/014 ,  G06F17/147 ,  H04N7/0125 ,  H04N19/122 ,  H04N19/132 ,  H04N19/157 ,  H04N19/176 ,  H04N19/523 ,  H04N19/59 ,  H04N19/61 ,  H04N19/80 ,  H04N19/90

    摘要： An MPEG downdecoder is to be provided which eliminates dephasing of pixels of moving picture data without losing properties inherent in a picture obtained on interlaced scanning. In the case of a field DCT mode, 4×4 decimating IDCT is executed for phase correction for a ¼ pixel for pixels in the vertical direction of a top field and for phase correction for ¾ pixel for pixels in the vertical direction of a bottom field. In the case of a frame DCT mode, the totality of coefficients of a DCT block are IDCTed and separated into two pixel blocks associated with interlaced scanning. The low-frequency components of these two pixel blocks are IDCTed to synthesize the two pixel blocks. The pixels in the vertical direction of the top field are phase-corrected by a ¼ pixel, while those in the vertical direction of the bottom field are phase-corrected by a ¾ pixel.

    摘要翻译： 将提供一种MPEG降解编码器，其消除了运动图像数据的像素的去相位，而不会损失在隔行扫描中获得的图像中固有的特性。 在场DCT模式的情况下，对顶场的垂直方向上的像素的1/4像素执行4×4抽取IDCT，并且对于底场的垂直方向上的像素的¾像素进行相位校正。 在帧DCT模式的情况下，DCT块的系数的总和被IDCT化并分离成与隔行扫描相关联的两个像素块。 这两个像素块的低频分量被IDCTed以合成两个像素块。 顶场的垂直方向上的像素被1/4像素相位校正，而底场的垂直方向上的像素被¾像素相位校正。

    Television signal recording/reproducing apparatus and method with DC shifter
    37.
    发明授权
    Television signal recording/reproducing apparatus and method with DC shifter 失效
    具有直流移位器的电视信号记录/再现装置和方法

    公开(公告)号：US5909531A

    公开(公告)日：1999-06-01

    申请号：US881813

    申请日：1997-06-24

    申请人： Keiji Kanota ,  Naofumi Yanagihara

    发明人： Keiji Kanota ,  Naofumi Yanagihara

    IPC分类号： H04N5/92 ,  H04N5/783 ,  H04N7/00 ,  H04N9/804 ,  H04N9/808 ,  H04N9/82 ,  H04N9/83 ,  H04N11/16 ,  H04N9/79

    CPC分类号： H04N9/832 ,  H04N7/007 ,  H04N9/8047 ,  H04N11/167 ,  H04N5/783 ,  H04N9/8216 ,  H04N9/8233

    摘要： Recording and reproducing a television signal with a DC shifter prevents compression distortion of a PAL plus television signal. The PAL plus television signal includes a vertical resolution signal for enhancing vertical resolution which vertical resolution signal is included in the same compression blocks as some of the component video signals. Such compression blocks are shifted to a DC set up value so that the signals within those compression blocks do not have varying DC offsets which otherwise could result in compression distortion. Similarly, upon reproduction, the DC set up value is removed after decompression and the original television signal is restored with complete vertical resolution.

    摘要翻译： 用DC移位器记录和再现电视信号可以防止PAL加电视信号的压缩失真。 PAL plus电视信号包括用于增强垂直分辨率的垂直分辨率信号，垂直分辨率信号包括在与一些分量视频信号相同的压缩块中。 这样的压缩块被转移到DC建立值，使得那些压缩块内的信号不具有变化的DC偏移，否则可能导致压缩失真。 类似地，在再现时，在解压缩之后，DC设置值被去除，并且以完全的垂直分辨率恢复原始电视信号。