公开(公告)号：US06560282B2

公开(公告)日：2003-05-06

申请号：US09265732

申请日：1999-03-09

申请人： Katsumi Tahara ,  Yoshihiro Murakami ,  Takuya Kitamura ,  Kanji Mihara

发明人： Katsumi Tahara ,  Yoshihiro Murakami ,  Takuya Kitamura ,  Kanji Mihara

IPC分类号： H04N712

CPC分类号： H04N19/0006 ,  H04N19/10 ,  H04N19/107 ,  H04N19/115 ,  H04N19/152 ,  H04N19/40 ,  H04N19/428 ,  H04N19/61

摘要： The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and,the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history information, and performs a present encoding process by using the past encoding parameters selectively so that the present encoding process is optimized. Furthermore, the encoder describe the past encoding parameters into the encoded bitstream as the history information so as to reuse the history information in advance encoding process. The picture quality of the video data does not deteriorate even if decoding and encoding processes are carried out repeatedly by the transcoder.

摘要翻译： 本发明提供一种具有MPEG解码器和MPEG编码器的代码转换器，用于改变GOP​​结构以及作为编码处理的结果获得的编码比特流的比特率。 MPEG编码器接收在过去的编码处理中生成的过去的编码参数作为历史信息，并且通过选择性地使用过去的编码参数来执行当前编码处理，使得当前编码处理被优化。 此外，编码器将过去的编码参数描述为编码比特流中的历史信息，以便在预编码处理中重用历史信息。 即使通过代码转换器重复执行解码和编码处理，视频数据的图像质量也不会劣化。

公开(公告)号：USRE43111E1

公开(公告)日：2012-01-17

申请号：US12152287

申请日：2008-05-12

申请人： Katsumi Tahara ,  Hiromi Yoshinari

发明人： Katsumi Tahara ,  Hiromi Yoshinari

IPC分类号： H04N7/50 ,  H04N7/26 ,  G06T9/00

CPC分类号： H04N7/54 ,  H04N9/8047 ,  H04N19/159 ,  H04N19/40 ,  H04N19/46 ,  H04N19/61 ,  H04N21/23614 ,  H04N21/4348

摘要： A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.

摘要翻译： 指示图像间编码（I图像），前向或后向预测编码（P图像）和双向预测编码（B图像）之一的图像类型标识符被包括在图像信号中 信号被编码，并且信号被解码时。 初始和后续编码和解码中的每一个都是所包含的图像类型的函数。

公开(公告)号：US07126993B2

公开(公告)日：2006-10-24

申请号：US10371897

申请日：2003-02-20

申请人： Takuya Kitamura ,  Mamoru Ueda ,  Katsumi Tahara

发明人： Takuya Kitamura ,  Mamoru Ueda ,  Katsumi Tahara

IPC分类号： H04N7/12 ,  H04N5/26 ,  H04N7/26 ,  H04B1/11

CPC分类号： H04N5/4401 ,  H04N7/083 ,  H04N7/085 ,  H04N7/088 ,  H04N11/20 ,  H04N19/107 ,  H04N19/11 ,  H04N19/112 ,  H04N19/122 ,  H04N19/124 ,  H04N19/136 ,  H04N19/137 ,  H04N19/149 ,  H04N19/152 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/188 ,  H04N19/196 ,  H04N19/40 ,  H04N19/46 ,  H04N19/463 ,  H04N19/61 ,  H04N19/70 ,  H04N21/2343 ,  H04N21/235 ,  H04N21/23602 ,  H04N21/23614 ,  H04N21/2662 ,  H04N21/4342 ,  H04N21/4348 ,  H04N21/435

摘要： Encoding parameters of picture and higher layers of importance to a number of applications, and encoding parameters of slice and lower layers of no importance to all applications are converted into auxiliary packets inserted respectively into a V-blanking area and an H-blanking area of a video-data signal output by a history-information-multiplexing apparatus employed in a video-decoding system. On the other hand, a video-encoding system extracts back the auxiliary packets superposed on the V-blanking area and the H-blanking area from an input base-band video signal. As a result, a technique of superposing information on data can be changed in accordance with the importance of the information and required information can be fetched with ease.

公开(公告)号：US6041160A

公开(公告)日：2000-03-21

申请号：US879038

申请日：1997-06-19

申请人： Yoichi Yagasaki ,  Katsumi Tahara

发明人： Yoichi Yagasaki ,  Katsumi Tahara

IPC分类号： H04N5/92 ,  G06F21/10 ,  G06T9/00 ,  H04N7/167 ,  H04N7/169 ,  H04N7/50 ,  H04N9/804 ,  H04N19/00 ,  H04N19/423 ,  H04N19/46 ,  H04N19/70 ,  H04N19/85 ,  H04N21/4367 ,  H04N5/91

CPC分类号： H04N9/8042 ,  H04N19/61

摘要： A picture encoding method in which the picture signal can be scrambled without deteriorating the picture quality of the encoded picture of the MPEG system. A B-picture f the input picture signal is given random offset in the horizontal direction on the slice basis and encoded by an MPEG encoding device. An offset amount is written as a key on the disc along with the encoded data. A decoding device corrects the offset amount in the slice basis using the key of the reproduced signal. The picture signal can be scrambled in this manner without modifying the MPEG system.

摘要翻译： 可以对图像信号进行加扰而不恶化MPEG系统的编码图像的图像质量的图像编码方法。 输入图像信号的B图像在片基上在水平方向上被赋予随机偏移量，并由MPEG编码装置编码。 偏移量与编码数据一起写入盘上的键。 解码装置使用再生信号的键来校正切片的偏移量。 可以以这种方式对图像信号进行加扰而不修改MPEG系统。

公开(公告)号：US5949792A

公开(公告)日：1999-09-07

申请号：US841681

申请日：1997-04-30

申请人： Mikita Yasuda ,  Katsumi Tahara ,  Noriaki Oishi ,  Shinji Negishi

发明人： Mikita Yasuda ,  Katsumi Tahara ,  Noriaki Oishi ,  Shinji Negishi

IPC分类号： G11B27/034 ,  G11B27/10 ,  G11B27/30 ,  H04N5/85 ,  H04N7/24 ,  H04N7/32 ,  H04N7/52 ,  H04N9/804 ,  H04N9/82 ,  H04J3/24

CPC分类号： H04N21/4347 ,  G11B27/034 ,  G11B27/105 ,  G11B27/3027 ,  H04N19/152 ,  H04N21/21805 ,  H04N21/42646 ,  H04N21/4325 ,  H04N21/4341 ,  H04N21/44004 ,  H04N21/44016 ,  H04N7/52 ,  H04N9/8042 ,  G11B2220/20 ,  G11B2220/2525 ,  H04N19/50 ,  H04N5/85 ,  H04N9/8227

摘要： A method for encoding a digital signal which is free from overflow and/or underflow of decoder buffer when video and audio data are reproduced while switching a plurality of bit streams from one to another, is disclosed. The method includes the steps of receiving a plurality of digital signal bit streams, detecting sizes of access units, as an encoding unit, of the plural digital signal bit streams, and decode times thereof, comparing the detected sizes of the access units at each decode time, with each other to select a maximum value thereof, providing a virtual stream composed of access units each having a size identical to the selected maximum value at each decode time, and packetizing each of the plural digital signal bit streams, wherein the plural digital signal bit streams are packetized by using padding packets each having a size corresponding to a difference in size between each access unit of the plural digital signal bit streams and that of the virtual stream, when the size of the access unit of the plural digital signal bit streams is less than the size of the access unit of the virtual stream. In accordance with the present invention, there are also provided an apparatus for encoding the digital signal, a method for recording the digital signal on a recording medium, and a method for transmitting the digital signal.

摘要翻译： 公开了一种在将多个比特流从一个切换到另一个时再现视频和音频数据时，对解码器缓冲器的溢出和/或下溢的数字信号进行编码的方法。 该方法包括以下步骤：接收多个数字信号比特流，检测多个数字信号比特流中的多个数字信号比特流作为编码单元的大小及其解码时间，比较每个解码时检测到的存取单元大小 时间彼此选择其最大值，提供由每个具有与每个解码时间所选择的最大值相同的大小的访问单元组成的虚拟流，以及分组多个数字信号比特流中的每一个，其中多个数字 当多个数字信号比特的存取单元的大小在多个数字信号比特流的访问单元和虚拟流的访问单元之间的大小时，通过使用各自具有与多个数字信号比特流的每个访问单元之间的大小差异的大小的填充分组来分组信号比特流 流小于虚拟流的访问单元的大小。 根据本发明，还提供了一种用于对数字信号进行编码的装置，一种用于在记录介质上记录数字信号的方法和一种用于发送数字信号的方法。

公开(公告)号：US5675379A

公开(公告)日：1997-10-07

申请号：US520840

申请日：1995-08-29

申请人： Motoki Kato ,  Tsuyoshi Oda ,  Katsumi Tahara

发明人： Motoki Kato ,  Tsuyoshi Oda ,  Katsumi Tahara

IPC分类号： H04N5/92 ,  G11B11/10 ,  G11B11/105 ,  G11B20/10 ,  H03M7/30 ,  H04N5/85 ,  H04N9/11 ,  H04N9/804 ,  H04N19/00 ,  H04N19/126 ,  H04N19/132 ,  H04N19/134 ,  H04N19/137 ,  H04N19/147 ,  H04N19/177 ,  H04N19/194 ,  H04N19/196 ,  H04N19/423 ,  H04N19/503 ,  H04N19/587 ,  H04N19/61 ,  H04N19/625 ,  H04N19/65 ,  H04N19/80 ,  H04N19/85 ,  H04N19/91 ,  H04N3/36 ,  H04N5/253 ,  H04N9/47

CPC分类号： H04N9/8042 ,  H04N19/114 ,  H04N19/115 ,  H04N19/132 ,  H04N19/177 ,  H04N19/61 ,  H04N19/146 ,  H04N19/152 ,  H04N5/85 ,  H04N9/11

摘要： A method and apparatus for encoding moving picture signals. A plurality of encoding picture groups, each consisting of a pre-set number of encoding pictures freed of redundant pictures from a plurality of original pictures represented by the input moving picture signals, are formed, and the number of original pictures used for forming the encoding picture groups and the group-based target bit amount are calculated. The moving picture signals of the encoding pictures are encoded from one picture group to another based upon the target bit amount. Even if the encoding picture rate is changed from one picture group to another, the target bit amount can be adaptively controlled with these changes in the encoding picture rate. Consequently, there is no risk of the output bit rate significantly surpassing the target value. In addition, there is no risk of the total bit amount in the bit stream exceeding the target amount to render it impossible to record the bit stream on a desired moving picture signal recording medium.

摘要翻译： 一种用于编码运动图像信号的方法和装置。 形成多个编码图像组，每个编码图像组由从由输入的运动图像信号表示的多个原始图像中排除冗余图像的预设数量的编码图像组成，并且用于形成编码的原始图像的数量 计算图像组和基于组的目标比特量。 基于目标比特量，编码图像的运动图像信号从一个图像组被编码到另一个图像组。 即使编码图像速率从一个图像组改变​​到另一个图像组，也可以通过编码图像速率的这些变化自适应地控制目标比特量。 因此，没有输出比特率显着超过目标值的风险。 此外，比特流中的总比特量不存在超过目标量的风险，使得不可能将比特流记录在期望的运动图像信号记录介质上。

公开(公告)号：US5504530A

公开(公告)日：1996-04-02

申请号：US83057

申请日：1993-06-25

申请人： Nobuhisa Obikane ,  Katsumi Tahara ,  Yoichi Yagasaki ,  Jun Yonemitsu ,  Teruhiko Suzuki

发明人： Nobuhisa Obikane ,  Katsumi Tahara ,  Yoichi Yagasaki ,  Jun Yonemitsu ,  Teruhiko Suzuki

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/36 ,  H04N7/46 ,  H04N7/50

CPC分类号： H04N19/577 ,  H04N19/107 ,  H04N19/112 ,  H04N19/122 ,  H04N19/124 ,  H04N19/132 ,  H04N19/137 ,  H04N19/152 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/59 ,  H04N19/61

摘要： A compression-coded high definition television signal is decoded and converted to a standard NTSC signal without loss of interlacing so that the resulting picture exhibits smooth motion. The compression-coding of the HDTV signal includes DCT processing to produce an 8.times.8 block of coefficient data. Upon decoding, the upper left quadrant of the coefficient data array is used to form a 4.times.4 subblock of coefficient data but the last row of elements of the subblock is replaced by corresponding elements of the eighth row of the 8.times.8 block of coefficient data.

摘要翻译： 压缩编码的高分辨率电视信号被解码并转换成标准NTSC信号，而不会失去隔行扫描，使得所得到的图像呈现平滑的运动。 HDTV信号的压缩编码包括产生8×8系数数据块的DCT处理。 在解码时，系数数据阵列的左上象限用于形成系数数据的4×4子块，但子块的最后一行元素由系数数据的8×8块的第8行的相应元素代替。

公开(公告)号：US5485279A

公开(公告)日：1996-01-16

申请号：US87207

申请日：1993-07-02

申请人： Jun Yonemitsu ,  Katsumi Tahara ,  Teruhiko Suzuki

发明人： Jun Yonemitsu ,  Katsumi Tahara ,  Teruhiko Suzuki

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N5/781 ,  H04N5/782 ,  H04N5/85 ,  H04N5/92 ,  H04N7/01 ,  H04N9/804 ,  H04N9/888 ,  H04N19/102 ,  H04N19/112 ,  H04N19/12 ,  H04N19/189 ,  H04N19/36 ,  H04N19/423 ,  H04N19/46 ,  H04N19/463 ,  H04N19/50 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/517 ,  H04N19/59 ,  H04N19/60 ,  H04N19/61 ,  H04N19/625 ,  H04N19/635 ,  H04N19/65 ,  H04N19/70 ,  H04N19/85 ,  H04N19/89 ,  H04N19/91 ,  H04N7/32

CPC分类号： H04N9/8047 ,  H04N19/112 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30 ,  H04N19/37 ,  H04N19/48 ,  H04N19/503 ,  H04N19/577 ,  H04N19/59 ,  H04N19/61 ,  H04N19/90 ,  H04N5/781 ,  H04N5/782 ,  H04N5/85 ,  H04N9/888

摘要： Reproducing an input image of reduced resolution with respect to the vertical and horizontal directions in high picture quality by processing a coded bit stream of normal resolution. A difference signal (mismatching error signal) representing the difference between a predicted image of the normal resolution and a predicted image of a half resolution with respect to the vertical and horizontal directions is coded and the coded difference signal is transmitted. When producing the predicted image, image data is subjected to motion compensation according to a specified prediction mode.

摘要翻译： 通过处理正常分辨率的编码比特流，再现相对于高图像质量的垂直和水平方向的分辨率降低的输入图像。 编码表示正常分辨率的预测图像与相对于垂直和水平方向的半分辨率的预测图像之间的差的差分信号（失配误差信号），并且发送编码差分信号。 当产生预测图像时，根据指定的预测模式对图像数据进行运动补偿。

公开(公告)号：US5164828A

公开(公告)日：1992-11-17

申请号：US658787

申请日：1991-02-21

申请人： Katsumi Tahara ,  Seiichi Emoto

发明人： Katsumi Tahara ,  Seiichi Emoto

IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/46 ,  H04N7/50

CPC分类号： H04N19/587 ,  H04N19/112 ,  H04N19/126 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/60 ,  H04N19/61 ,  H04N19/80 ,  H04N19/82 ,  H04N19/124 ,  H04N19/13 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/50 ,  H04N19/91

摘要： In a video signal transmission system, in which video signals are transformed to high efficiency coded data and are then transmitted, a quantization step size is enlarged when quantizing intra coded picture data to avoid an excessive increase in the amount of data generated. The amount of residual data in a transmission buffer memory is monitored, and frame dropping is initiated when it exceeds a certain predetermined level, but the frame dropping operation is not completed until the amount of residual data falls below a different, smaller predetermined level. Video signals which are sent immediately after a transmission line is connected to a destination are intra coded to enhance system usability.

公开(公告)号：USRE40415E1

公开(公告)日：2008-07-01

申请号：US09497026

申请日：2000-02-02

申请人： Katsumi Tahara ,  Hiromi Yoshinari

发明人： Katsumi Tahara ,  Hiromi Yoshinari

IPC分类号： H04N7/12 ,  H04B1/66

CPC分类号： H04N21/4348 ,  H04N5/765 ,  H04N7/54 ,  H04N9/8042 ,  H04N19/159 ,  H04N19/172 ,  H04N19/40 ,  H04N19/46 ,  H04N19/61 ,  H04N21/23614

摘要： A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.

摘要翻译： 指示图像间编码（I图像），前向或后向预测编码（P图像）和双向预测编码（B图像）之一的图像类型标识符被包括在图像信号中 信号被编码，并且信号被解码时。 初始和后续编码和解码中的每一个都是所包含的图像类型的函数。