公开(公告)号：US6061495A

公开(公告)日：2000-05-09

申请号：US891547

申请日：1997-07-11

申请人： Naofumi Yanagihara ,  Nobuaki Izumi

发明人： Naofumi Yanagihara ,  Nobuaki Izumi

IPC分类号： H04N5/783 ,  G11B20/10 ,  H04N5/7826 ,  H04N5/92 ,  H04N5/93 ,  H04N9/804 ,  H04N9/877 ,  H04N9/888 ,  H04N19/102 ,  H04N19/162 ,  H04N19/167 ,  H04N19/423 ,  H04N19/44 ,  H04N19/50 ,  H04N19/503 ,  H04N19/577 ,  H04N19/61 ,  H04N19/625 ,  H04N19/70 ,  H04N19/85 ,  H04N19/91

CPC分类号： H04N9/8042 ,  H04N5/78263 ,  H04N5/783 ,  H04N9/877 ,  H04N9/888

摘要： A recording/reproducing apparatus for reproducing recorded encoded picture data from a recording medium in varying speed without picture disruption. The recorded picture data are read from the recording medium and stored in a buffer memory. A detection circuit detects a picture header in the stored picture data and, depending upon the results of such detection, may or may not supply a clock signal therefrom. If a picture header is not detected, the detection circuit supplies the clock signal to the buffer memory and a delaying circuit. In response thereto, the stored picture data are read out from the buffer memory and supplied to the delaying circuit so as to be delayed by a predetermined amount prior to being supplied therefrom. If a picture header is detected during varying speed reproduction by the detection circuit, the clock signal is not supplied to the buffer memory and the delaying circuit, whereupon the delaying circuit outputs "0"s for a predetermined time period.

摘要翻译： 一种记录/再现装置，用于以无变化的速度从记录介质再现记录的编码图像数据而没有图像中断。 记录的图像数据从记录介质读取并存储在缓冲存储器中。 检测电路检测所存储的图像数据中的图像标题，并且根据这种检测的结果，可以提供或不提供时钟信号。 如果没有检测到图像头，则检测电路将时钟信号提供给缓冲存储器和延迟电路。 响应于此，存储的图像数据从缓冲存储器读出并提供给延迟电路，以便在被提供之前被延迟预定量。 如果在通过检测电路的变速再现期间检测到图像头，则时钟信号不被提供给缓冲存储器和延迟电路，于是延迟电路在预定时间段内输出“0”。

公开(公告)号：US06963606B1

公开(公告)日：2005-11-08

申请号：US09341401

申请日：1998-11-05

申请人： Naofumi Yanagihara ,  Nobuaki Izumi

发明人： Naofumi Yanagihara ,  Nobuaki Izumi

IPC分类号： H04N19/103 ,  H04N19/114 ,  H04N19/126 ,  H04N19/134 ,  H04N19/136 ,  H04N19/137 ,  H04N19/146 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/40 ,  H04N19/423 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/577 ,  H04N19/59 ,  H04N19/60 ,  H04N19/61 ,  H04N19/625 ,  H04N19/85 ,  H04N19/88 ,  H04N19/91 ,  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 input 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 a 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取消成帧，然后由可变长度解码（VLD）部分12进行解码，将其逆量化 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在正交变换域（频域）中进行所需的分辨率转换。 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的可变长度编码编码的量化（Q）部分19进行量化 并作为第二格式的数字信号（MPEG视频信号）输出。

公开(公告)号：US5835664A

公开(公告)日：1998-11-10

申请号：US841114

申请日：1997-04-29

申请人： Yuka Oikawa ,  Naofumi Yanagihara ,  Nobuaki Izumi

发明人： Yuka Oikawa ,  Naofumi Yanagihara ,  Nobuaki Izumi

IPC分类号： G11B15/12 ,  G11B15/18 ,  G11B20/10 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/92 ,  H04N9/804 ,  H04N9/87

CPC分类号： H04N9/8047 ,  G11B15/125 ,  G11B15/1875 ,  H04N5/783 ,  H04N5/78266 ,  H04N9/87

摘要： A method and an apparatus for reproducing digital video signals in which every one-frame data of the digital video signals are recorded on n tracks of a recording medium by an inclined azimuth recording system are varying speed reproduced by a rotary head having n heads with a varying playback speed such that A=a(t.multidot.m.+-.1)/n, where a is a constant equal to 1 or 2 and m is a constant which is an integer other than 0. A picture corresponding to the digital video signals read out with the varying playback speed S is displayed on the screen. In this manner, non-continuous lines caused by temporal difference in neighboring macro-blocks during varying speed reproduction may be rendered less obtrusive for improving the picture quality of the varying speed reproduced picture.

摘要翻译： 一种用于再现数字视频信号的方法和装置，其中通过倾斜方位记录系统将数字视频信号的每一帧数据记录在记录介质的+ E，uns + + EE磁道上，是由旋转 头部具有不同重放速度的n个头，使得A = a（txm +/- 1）/ n，其中+ E，uns a + EE是等于1或2和+ E的常数，uns m + EE是常数 其是除了0之外的整数。在屏幕上显示与以变化的重放速度S读出的数字视频信号相对应的图像。 以这种方式，由于变化速度再现期间的相邻宏块的时间差引起的非连续线可能变得不那么突出，以提高变速再现图像的图像质量。

公开(公告)号：US5677734A

公开(公告)日：1997-10-14

申请号：US515529

申请日：1995-08-15

申请人： Yuka Oikawa ,  Naofumi Yanagihara ,  Nobuaki Izumi

发明人： Yuka Oikawa ,  Naofumi Yanagihara ,  Nobuaki Izumi

IPC分类号： H04N5/92 ,  G11B20/10 ,  H04N7/54 ,  H04N9/804 ,  H04N11/02 ,  H04N7/12

CPC分类号： H04N9/8047 ,  H04N19/126 ,  H04N19/149 ,  H04N19/176 ,  H04N19/192 ,  H04N19/60 ,  H04N19/88 ,  H04N7/54 ,  H04N19/146

摘要： A method and apparatus for recording digital video signals in which digital video signals in the form of DCT coefficients, obtained by e.g., discrete cosine transform, are quantized and compressed so as to be recorded on a recording medium. A first quantization step decision unit determines a quantization step in terms of a video segment made up of plural macro-blocks as a unit so that the quantity of quantized data is less than a pre-set data quantity. A second quantization step decision unit determines a quantization step in terms of the macro-blocks as a unit so that the quantity of quantized data is less than the pre-set data quantity. A quantization unit quantizes the digital video signals with the quantization steps determined by the first quantization step decision unit and the second quantization step decision unit. This enables efficient encoding and improved picture quality.

摘要翻译： 用于记录数字视频信号的方法和装置，其中通过例如离散余弦变换获得的DCT系数形式的数字视频信号被量化和压缩，以便被记录在记录介质上。 第一量化步骤决定单元以由多个宏块构成的视频段为单位确定量化步长，使得量化数据量小于预设数据量。 第二量化步骤决定单元以宏块为单位来确定量化步长，使得量化数据量小于预设数据量。 量化单元利用由第一量化步长决定单元和第二量化步骤决定单元确定的量化步长量化数字视频信号。 这使得能够进行有效的编码和改进的图像质量。

公开(公告)号：US20050157786A1

公开(公告)日：2005-07-21

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： H04N19/103 ,  H04N19/114 ,  H04N19/126 ,  H04N19/134 ,  H04N19/136 ,  H04N19/137 ,  H04N19/146 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/40 ,  H04N19/423 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/577 ,  H04N19/59 ,  H04N19/60 ,  H04N19/61 ,  H04N19/625 ,  H04N19/85 ,  H04N19/88 ,  H04N19/91 ,  H04N7/12

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。

公开(公告)号：US6078723A

公开(公告)日：2000-06-20

申请号：US977748

申请日：1997-11-25

申请人： Naofumi Yanagihara ,  Nobuaki Izumi

发明人： Naofumi Yanagihara ,  Nobuaki Izumi

IPC分类号： H04N5/783 ,  G11B20/10 ,  H04N5/7826 ,  H04N5/92 ,  H04N5/93 ,  H04N9/804 ,  H04N9/877 ,  H04N9/888 ,  H04N19/102 ,  H04N19/162 ,  H04N19/167 ,  H04N19/423 ,  H04N19/44 ,  H04N19/50 ,  H04N19/503 ,  H04N19/577 ,  H04N19/61 ,  H04N19/625 ,  H04N19/70 ,  H04N19/85 ,  H04N19/91

CPC分类号： H04N9/8042 ,  H04N5/78263 ,  H04N5/783 ,  H04N9/877 ,  H04N9/888

摘要： A recording/reproducing apparatus for reproducing recorded encoded picture data from a recording medium in varying speed without picture disruption. The recorded picture data are read from the recording medium and stored in a buffer memory. A detection circuit detects a picture header in the stored picture data and, depending upon the results of such detection, may or may not supply a clock signal therefrom. If a picture header is not detected, the detection circuit supplies the clock signal to the buffer memory and a delaying circuit. In response thereto, the stored picture data are read out from the buffer memory and supplied to the delaying circuit so as to be delayed by a predetermined amount prior to being supplied therefrom. If a picture header is detected during varying speed reproduction by the detection circuit, the clock signal is not supplied to the buffer memory and the delaying circuit, whereupon the delaying circuit outputs "0"s for a predetermined time period.

摘要翻译： 一种记录/再现装置，用于以无变化的速度从记录介质再现记录的编码图像数据而没有图像中断。 记录的图像数据从记录介质读取并存储在缓冲存储器中。 检测电路检测所存储的图像数据中的图像标题，并且根据这种检测的结果，可以提供或不提供时钟信号。 如果没有检测到图像头，则检测电路将时钟信号提供给缓冲存储器和延迟电路。 响应于此，存储的图像数据从缓冲存储器读出并提供给延迟电路，以便在被提供之前被延迟预定量。 如果在通过检测电路的变速再现期间检测到图像头，则时钟信号不被提供给缓冲存储器和延迟电路，于是延迟电路在预定时间段内输出“0”。

公开(公告)号：US07593464B2

公开(公告)日：2009-09-22

申请号：US11082022

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。

公开(公告)号：US07221709B2

公开(公告)日：2007-05-22

申请号：US11081946

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。

公开(公告)号：US06674897B1

公开(公告)日：2004-01-06

申请号：US08929747

申请日：1997-09-15

申请人： Kiminori Sugisaki ,  Jason Fischl ,  Nobuaki Izumi ,  Naofumi Yanagihara ,  Yuka Kiyama

发明人： Kiminori Sugisaki ,  Jason Fischl ,  Nobuaki Izumi ,  Naofumi Yanagihara ,  Yuka Kiyama

IPC分类号： G06K900

CPC分类号： H04N11/044 ,  H04N9/8047 ,  H04N19/122 ,  H04N19/126 ,  H04N19/137 ,  H04N19/14 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/88

摘要： A picture data compressing device has picture data divided by a blocking circuit 1 in to a plurality of blocks, each block consisting of a pre-set number of pixels and shuffled by a shuffling circuit 2. The blocked and shuffled data is transformed by a DCT circuit 3 into data in the frequency domain and re-quantized by a quantization circuit 4, thereby compressing the picture data. A red detector 6 determines whether a block from the shuffling circuit 2 is the red-based block. If the red detector 6 detects a red-based block, a controller 7 controls the quantization circuit 4 so that the quantization step of the quantization circuit 4 will become finer. Thus, the data of the red-based block susceptible to block distortion may be quantized with a finer quantization step for improving reproduction and alleviating block distortion.

摘要翻译： 图像数据压缩装置具有由阻塞电路1分割成多个块的图像数据，每个块由预定数量的像素组成并由混洗电路2进行混洗。阻塞和混洗数据被DCT变换 电路3转换成频域的数据并由量化电路4重新量化，由此压缩图像数据。 红色检测器6确定来自混洗电路2的块是否是基于红色的块。 如果红色检测器6检测到基于红色的块，则控制器7控制量化电路4，使得量化电路4的量化步长变得更细。 因此，可以通过更精细的量化步长来量化易受块失真的红色块的数据，以改善再现并减轻块失真。

公开(公告)号：US5710858A

公开(公告)日：1998-01-20

申请号：US518329

申请日：1995-08-23

申请人： Yuka Oikawa ,  Naofumi Yanagihara ,  Nobuaki Izumi

发明人： Yuka Oikawa ,  Naofumi Yanagihara ,  Nobuaki Izumi

IPC分类号： G11B15/12 ,  G11B15/18 ,  G11B20/10 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/92 ,  H04N9/804 ,  H04N9/87

CPC分类号： H04N9/8047 ,  G11B15/125 ,  G11B15/1875 ,  H04N5/783 ,  H04N5/78266 ,  H04N9/87

摘要： A method and an apparatus for reproducing digital video signals in which every one-frame data of the digital video signals are recorded on n tracks of a recording medium by an inclined azimuth recording system are varying speed reproduced by a rotary head having n heads with a varying playback speed such that A=a(t.multidot.m.+-.1)/n, where a is a constant equal to 1 or 2 and m is a constant which is an integer other than 0. A picture corresponding to the digital video signals read out with the varying playback speed S is displayed on the screen. In this manner, non-continuous lines caused by temporal difference in neighboring macro-blocks during varying speed reproduction may be rendered less obtrusive for improving the picture quality of the varying speed reproduced picture.

摘要翻译： 一种用于再现数字视频信号的方法和装置，其中通过倾斜方位记录系统将数字视频信号的每一帧数据记录在记录介质的n个轨道上，是由具有n个磁头的旋转磁头重现的变化速度， 变化的重放速度使得A = a（txm +/- 1）/ n，其中a是等于1或2的常数，m是除了0以外的整数的常数。读出对应于数字视频信号的图像 在屏幕上显示变化的播放速度S. 以这种方式，由于变化速度再现期间的相邻宏块的时间差引起的非连续线可能变得不那么突出，以提高变速再现图像的图像质量。