公开(公告)号：US06795499B1

公开(公告)日：2004-09-21

申请号：US09583422

申请日：2000-05-31

申请人： Motoki Kato ,  Koji Obata ,  Nobuhiro Igi ,  Yoshikazu Takashima

发明人： Motoki Kato ,  Koji Obata ,  Nobuhiro Igi ,  Yoshikazu Takashima

IPC分类号： H04N712

CPC分类号： H04N21/44016 ,  G11B27/034 ,  G11B27/036 ,  G11B2220/20 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8063 ,  H04N19/115 ,  H04N19/124 ,  H04N19/152 ,  H04N19/172 ,  H04N19/177 ,  H04N19/196 ,  H04N19/197 ,  H04N19/40 ,  H04N19/61 ,  H04N21/23406 ,  H04N21/23424 ,  H04N21/23655 ,  H04N21/44004

摘要： An encoder to encode video streams representing a moving picture is provided whose video encoder calculates a bit storage quantity an STD video buffer should have when input of a stream ending with a first picture to the STD video buffer ends, calculates an initial bit storage quantity of a second picture of a stream concatenated to the end of the first picture and starting with the second picture, in a VBV buffer, based on the calculated bit storage quantity of the STD buffer, and encodes the stream based on the bit storage quantity. The video encoder further calculates a bit storage quantity of the STD video buffer, for decoding a picture of the stream in the STD video buffer, calculates, based on the calculated bit storage quantity, a bit storage quantity the VBV buffer should have for ending decoding of a fourth picture of a second stream concatenated to the beginning of a third picture and ending with the fourth picture, and encodes the stream based on the calculated bit storage quantity. With such encoding, a part of video streams can be re-coded without referencing to information indicative of an initial status of a video buffer when editing the video streams.

公开(公告)号：US06795498B1

公开(公告)日：2004-09-21

申请号：US09576594

申请日：2000-05-22

申请人： Motoki Kato ,  Koji Obata ,  Nobuhiro Igi ,  Hideyuki Narita

发明人： Motoki Kato ,  Koji Obata ,  Nobuhiro Igi ,  Hideyuki Narita

IPC分类号： H04B760

CPC分类号： H04N19/40 ,  H04N19/61

摘要： An image processing system comprising a decoder 10 and an encoder 30. The decoder 10 comprises a section 12 for decoding a bit stream to generate image data, generating coding parameters for each layer and generating an error flag indicating whether the coding parameters can be effectively used. The encoder 30 comprises a control section 41, an MB-parameter calculating section 36, an encoding section 38 and a variable-length encoding section 39. The section 41 determines, from the error flag, whether or not the coding parameters can be effectively used or not. The section 36 calculates coding parameters when the coding parameters generated by the section 12 are invalid. The sections 38 and 39 encodes the image data by using the coding parameters generated by the section 12 when these parameters are valid, and by using the coding parameters calculated by the section 36 when the coding parameters generated by the section 12 are invalid.

摘要翻译： 包括解码器10和编码器30的图像处理系统。解码器10包括用于对比特流进行解码以产生图像数据的部分12，为每个层生成编码参数并生成指示编码参数是否可以被有效地使用的错误标志 。 编码器30包括控制部分41，MB参数计算部分36，编码部分38和可变长度编码部分39.部分41根据误差标志确定是否可以有效地使用编码参数 或不。 当部分12产生的编码参数无效时，部分36计算编码参数。 部分38和39通过使用当这些参数有效时由部分12产生的编码参数，并且当由部分12产生的编码参数无效时，使用由部分36计算的编码参数来编码图像数据。

公开(公告)号：US06466625B1

公开(公告)日：2002-10-15

申请号：US09220746

申请日：1998-12-23

申请人： Hiroshi Kobayashi ,  Minoru Morio ,  Motoki Kato ,  Nobuhiro Igi ,  Koji Obata

发明人： Hiroshi Kobayashi ,  Minoru Morio ,  Motoki Kato ,  Nobuhiro Igi ,  Koji Obata

IPC分类号： H04N718

CPC分类号： H04N9/8042 ,  H04N5/85 ,  H04N19/527 ,  H04N19/61 ,  H04N19/82 ,  H04N19/86

摘要： A picture signal processing method and apparatus in which the block distortion as well as the mosquito noise produced on encoding/decoding a picture is to be suppressed. The picture signal processing apparatus includes a filter for filtering a picture, an encoder 5 for block-encoding the picture, a decoder 13 for decoding an encoded picture from the encoder 5 and a noise reducing unit 14 for reducing at least the block distortion of a picture decoded by the decoding unit 13 to reduce the noise otherwise produced on encoding/decoding the picture.

摘要翻译： 抑制图像编码/解码时产生的块失真以及产生的蚊式噪声的图像信号处理方法和装置。 图像信号处理装置包括用于对图像进行滤波的滤波器，用于对图像进行块编码的编码器5，用于从编码器5解码编码图像的解码器13和用于至少减少图像信号的块失真的噪声降低单元14 由解码单元13解码的图像，以减少在编码/解码图像时产生的噪声。

公开(公告)号：US6160915A

公开(公告)日：2000-12-12

申请号：US958589

申请日：1997-10-29

申请人： Motoki Kato ,  Hideki Koyanagi

发明人： Motoki Kato ,  Hideki Koyanagi

IPC分类号： G06T9/00 ,  H04N7/50 ,  H04N21/234 ,  H04N21/44 ,  G06K9/36

CPC分类号： H04N21/23406 ,  H04N19/115 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/164 ,  H04N19/184 ,  H04N19/61 ,  H04N21/44004

摘要： The present invention enables a stable signal reproduction without overflow or underflow of a buffer in a decoder system even if a transmission bit rate is changed. In particular, when coding and transmitting a digital signal at a variable bit rate, a size of an encoder buffer for temporarily storing a coded signal in an encoder system is controlled according to a coding bit rate from a terminal. The encoder buffer has a code buffer to be used for rate control by the encoder system. The size of this code buffer is determined according to a reception buffer size of a decoder system supplied from a terminal, a maximum value of a coding bit rate supplied from a terminal, and a current bit rate.

摘要翻译： 即使传输比特率改变，本发明也能够在解码器系统中实现稳定的信号再现，而不会缓冲器的溢出或下溢。 具体地，当以可变比特率编码和发送数字信号时，根据来自终端的编码比特率来控制用于在编码器系统中临时存储编码信号的编码器缓冲器的大小。 编码器缓冲器具有用于由编码器系统进行速率控制的代码缓冲器。 根据从终端提供的解码器系统的接收缓冲器大小，从终端提供的编码比特率的最大值和当前比特率来确定该代码缓冲器的大小。

公开(公告)号：US6061404A

公开(公告)日：2000-05-09

申请号：US8060

申请日：1998-01-16

申请人： Jun Yonemitsu ,  Motoki Kato

发明人： Jun Yonemitsu ,  Motoki Kato

IPC分类号： G11B20/10 ,  H04J3/14 ,  H04L13/08 ,  H04N5/85 ,  H04N5/926 ,  H04B14/04

CPC分类号： G11B20/10527 ,  H04N19/115 ,  H04N19/137 ,  H04N19/14 ,  H04N19/184 ,  H04N19/60 ,  H04N5/9261 ,  H04N19/146 ,  H04N19/152 ,  H04N5/85

摘要： An apparatus and a method of encoding a digital signal with which a transmission buffer (an encoder buffer) does not overflow even if recording of a signal on a recording medium is temporarily inhibited attributable to, for example, an external shock or even if transmission of a signal by broadcast or communication is temporarily inhibited because of unsatisfactory state of communication. In a case where recording on an optical disk is temporarily inhibited and an output of data from an encoder is interrupted attributable to, for example, an external shock during an operation for recording a bit stream obtained by encoding a video signal on the optical disk, an encoding bit rate is lowered. Thus, a fact that the encoder buffer overflows can be prevented.

摘要翻译： 即使记录介质上的信号的记录被暂时禁止，即使传送缓冲器（编码器缓冲器）也不会溢出，即使外部冲击也可能发生数字信号的编码的装置和方法， 由于通信状态不令人满意，暂时禁止通过广播或通信的信号。 在光盘上的记录被暂时禁止并且来自编码器的数据的输出被中断的情况下，可归因于用于记录通过对光盘编码视频信号而获得的位流的操作期间的外部冲击， 编码比特率降低。 因此，可以防止编码器缓冲器溢出的事实。

公开(公告)号：US6040865A

公开(公告)日：2000-03-21

申请号：US991517

申请日：1997-12-16

申请人： Motoki Kato ,  Nobuhiro Igi ,  Kazunori Yasuda

发明人： Motoki Kato ,  Nobuhiro Igi ,  Kazunori Yasuda

IPC分类号： H04N5/92 ,  H03M7/30 ,  H03M7/36 ,  H04N5/00 ,  H04N19/107 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/423 ,  H04N19/46 ,  H04N19/50 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/61 ,  H04N19/625 ,  H04N19/65 ,  H04N19/70 ,  H04N19/85 ,  H04N7/32

CPC分类号： H04N19/61

摘要： The present invention relates to an image signal coding apparatus and method, an image signal transmission method and a recording medium in which an input image signal is divided into a plurality of blocks and a reference image signal is used for carrying out a motion compensative prediction coding to each of the blocks. The present invention is characterized in that a reference image signal is used for each of the blocks to calculate: a motion vector prediction residue of a block for which a motion compensation is carried out; a residue of a block for which no motion compensation is carried out; and an average luminance value of pixel data within a block and a flatness value of the block. For each of the blocks, a magnitude of the aforementioned block motion vector prediction residue is compared to a magnitude of said block residue so that a result of this comparison is used to decide whether to carry out a motion compensation coding. In this process, the average luminance value and the flatness value of the block are used to switch between decision making region division types. According to a result of this decision, a motion compensative prediction coding is carried out for each of the blocks. Thus, even when a prediction residue is small on a flat portion of a image, it is possible to prevent generation of a fixed noise and improve the coding efficiency without deteriorating the image quality.

摘要翻译： 图像信号编码装置及方法，图像信号发送方法以及记录介质技术领域本发明涉及图像信号编码装置和方法，图像信号发送方法以及记录介质，其中输入图像信号被分成多个块，参考图像信号用于执行运动补偿预测编码 到每个块。 本发明的特征在于，对每个块使用参考图像信号来计算：执行运动补偿的块的运动矢量预测残差; 不执行运动补偿的块的残差; 以及块内的像素数据的平均亮度值和块的平坦度值。 对于每个块，将上述块运动矢量预测残差的大小与所述块残差的幅度进行比较，以使得该比较的结果用于决定是否执行运动补偿编码。 在该处理中，块的平均亮度值和平坦度值用于在决策区域划分类型之间切换。 根据该决定的结果，针对每个块执行运动补偿预测编码。 因此，即使在图像的平坦部分上的预测残差较小的情况下，也可以防止产生固定噪声，提高编码效率，而不会降低图像质量。

公开(公告)号：US5771357A

公开(公告)日：1998-06-23

申请号：US701754

申请日：1996-08-22

申请人： Motoki Kato ,  Hideki Koyanagi ,  Toru Wada

发明人： Motoki Kato ,  Hideki Koyanagi ,  Toru Wada

IPC分类号： H04N5/92 ,  H04N1/00 ,  H04N1/40 ,  H04N19/12 ,  H04N19/132 ,  H04N19/136 ,  H04N19/159 ,  H04N19/16 ,  H04N19/167 ,  H04N19/172 ,  H04N19/177 ,  H04N19/196 ,  H04N19/423 ,  H04N19/426 ,  H04N19/46 ,  H04N19/463 ,  H04N19/48 ,  H04N19/50 ,  H04N19/503 ,  H04N19/577 ,  H04N19/587 ,  H04N19/70 ,  H04N19/85 ,  G06F13/00

CPC分类号： H04N19/00 ,  H04N19/132 ,  H04N19/587 ,  H04N19/59 ,  H04N19/61

摘要： A moving picture is encoded into groups of video image pictures with each frame composed of fields of different field polarities including a predetermined field polarity. The polarity of the first field of a series of frames to be encoded into a respective group of image pictures is set to the predetermined field polarity. Alternatively, the polarity of the first field of the series of frames may be identified by data transmitted with the encoded moving picture. The encoded moving picture is decoded at a decode start time designated when the first field in each respective group of image pictures is of the predetermined field polarity. Alternatively, the decode start time is generated on the basis of the data designating the field polarity of the first field. A computer-readable medium provides a medium on which the encoded moving picture is recorded and directs a computer to decode the encoded moving picture when the first image picture in each respective group of image pictures is an encoded field of the predetermined field polarity or, alternatively, when the field read from the medium is the first field as designated by designating data.

摘要翻译： 运动图像被编码成视频图像图像组，每个帧由包括预定场极性的不同场极性的场组成。 要编码到相应图像图像组中的一系列帧的第一场的极性被设置为预定场极性。 或者，可以通过用编码的运动图像发送的数据来识别该系列帧的第一场的极性。 编码运动图像在每个相应图像图像组中的第一场具有预定场极性时指定的解码开始时间被解码。 或者，基于指定第一场的场极性的数据来​​生成解码开始时间。 计算机可读介质提供其上记录有编码运动图像的介质，并且当每个相应图像图像组中的第一图像图像是预定场极性的编码场时，引导计算机对编码的运动图像进行解码，或者 当从介质读取的场是通过指定数据指定的第一场。

公开(公告)号：US5719986A

公开(公告)日：1998-02-17

申请号：US641491

申请日：1996-05-01

申请人： Motoki Kato ,  Takashi Kojima

发明人： Motoki Kato ,  Takashi Kojima

IPC分类号： H04N5/92 ,  G11B20/10 ,  H04N5/781 ,  H04N5/782 ,  H04N5/85 ,  H04N9/804 ,  H04N11/04 ,  H04N19/00 ,  H04N19/126 ,  H04N19/134 ,  H04N19/136 ,  H04N19/139 ,  H04N19/14 ,  H04N19/169 ,  H04N19/176 ,  H04N19/177 ,  H04N19/186 ,  H04N19/194 ,  H04N19/196 ,  H04N19/423 ,  H04N19/50 ,  H04N19/503 ,  H04N19/51 ,  H04N19/513 ,  H04N19/61 ,  H04N19/625 ,  H04N19/63 ,  H04N19/65 ,  H04N19/85 ,  H04N19/86 ,  H04N19/89 ,  H04N19/91 ,  H04N7/32

CPC分类号： H04N9/8042 ,  H04N19/107 ,  H04N19/124 ,  H04N19/14 ,  H04N19/149 ,  H04N19/15 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/61 ,  H04N19/146 ,  H04N19/152 ,  H04N5/781 ,  H04N5/782 ,  H04N5/85

摘要： A method for encoding video signals including a first step of generating the information on picture characteristics at least including the luminance information of the input video signals in terms of a pre-set time interval as a unit, a second step of calculating the mean bit rate of the input video signals, a third step of calculating the information on the amount of bits generated per pre-set time interval of the input video signals, a fourth step of calculating the encoding difficulty per pre-set time interval based upon the information on picture characteristics, information on the amount of generated bits and the information on the total amount of usable data, a fifth step of determining the encoding bit rate per pre-set time interval by applying the encoding difficulty to a function for finding the encoding bit rate pre-set by the mean bit rate and a sixth step of encoding the input video signals in accordance with the encoding bit rate obtained per said pre-set time interval.

摘要翻译： 一种用于编码视频信号的方法，包括：以预定的时间间隔为单位产生关于图像特性的信息的至少包括输入视频信号的亮度信息的第一步骤;计算平均比特率的第二步骤 输入视频信号的第三步骤，计算关于输入视频信号的每个预定时间间隔产生的比特量的信息的第三步骤;基于关于每个预定时间间隔的信息计算每个预设时间间隔的编码难度的第四步骤 图像特性，关于生成比特量的信息和关于可用数据总量的信息;第五步骤，通过将编码难度应用于寻找编码比特率的函数来确定每个预设时间间隔的编码比特率 按照平均比特率预设，以及根据每个预定时间间隔获得的编码比特率对输入视频信号进行编码的第六步骤。

公开(公告)号：US5666461A

公开(公告)日：1997-09-09

申请号：US454598

申请日：1995-05-30

申请人： Katsuji Igarashi ,  Jun Yonemitsu ,  Yoichi Yagasaki ,  Yasushi Fujinami ,  Tomoyuki Sato ,  Motoki Kato ,  Teruhiko Suzuki

发明人： Katsuji Igarashi ,  Jun Yonemitsu ,  Yoichi Yagasaki ,  Yasushi Fujinami ,  Tomoyuki Sato ,  Motoki Kato ,  Teruhiko Suzuki

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/36 ,  H04N7/46 ,  H04N7/50 ,  H04N5/92 ,  H04N5/76 ,  H04N5/917

CPC分类号： H04N19/00 ,  H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/503 ,  H04N19/577 ,  H04N19/61 ,  H04N19/85 ,  H04N19/98 ,  H04N19/70

摘要： An encoder considers a frame representing a picture as comprised of areas. For each area, the encoder decides which of frame-based or field-based orthogonal transformation will be most efficient at reducing spatial redundancy in that area. For each area, the encoder decides which of frame-based or field-based predictive encoding will be most efficient at reducing temporal redundancy in that area. The encoder encodes each area of the picture frame using the most efficient orthogonal transformation technique and using the most efficient predictive encoding technique to produce an encoded signal. A decoder decodes the encoded signal. The encoded signal is recorded on a recording medium, transmitted over a transmission channel, or broadcast.

摘要翻译： 编码器将表示图像的帧视为由区域组成。 对于每个区域，编码器决定哪个基于帧的或基于场的正交变换将最有效地减少该区域中的空间冗余。 对于每个区域，编码器决定哪个基于帧的或基于场的预测编码在减少该区域的时间冗余方面将是最有效的。 编码器使用最有效的正交变换技术对图像帧的每个区域进行编码，并使用最有效的预测编码技术来产生编码信号。 解码器解码编码信号。 编码信号被记录在通过传输信道或广播传输的记录介质上。

公开(公告)号：US5410350A

公开(公告)日：1995-04-25

申请号：US5311

申请日：1993-01-15

申请人： Motoki Kato ,  Yoichi Yagasaki ,  Jun Yonemitsu

发明人： Motoki Kato ,  Yoichi Yagasaki ,  Jun Yonemitsu

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

CPC分类号： H04N19/98 ,  H04N19/12 ,  H04N19/61

摘要： A motion picture coding and decoding system is provided, which permits high picture quality to be obtained with less information amount than that in case of a system having the sole function of DCT coding, permits reduction of block distortion of reproduced picture and permits coding efficiency increase. One picture frame is divided into a plurality of blocks for block-by-block coding. At this time, discrete cosine transform (DCT) coding and intra-block non-transform coding (NTC) are adaptively switched one over to the other according to the character of pattern. In case of the intra-block non-transform coding, predictive values of block and quantizing width are transmitted. Each block is adaptively selected with sub block of frame construction or sub block of field construction.

摘要翻译： 提供了一种运动图像编码和解码系统，其允许以比具有唯一DCT编码功能的系统的情况更少的信息量获得高图像质量，允许减少再现图像的块失真并且允许编码效率增加 。 一个画面被分成多个用于逐块编码的块。 此时，离散余弦变换（DCT）编码和块内非变换编码（NTC）根据模式的特性自适应地切换到另一个。 在块内非变换编码的情况下，发送块和量化宽度的预测值。 每个块由框架结构的子块或现场构造的子块自适应地选择。