公开(公告)号：US4723161A

公开(公告)日：1988-02-02

申请号：US841175

申请日：1986-03-19

申请人： Toshio Koga

发明人： Toshio Koga

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/50 ,  H04N7/12

CPC分类号： H04N19/12 ,  H04N19/112 ,  H04N19/30 ,  H04N19/61

摘要： In order to encode image signals using interframe correlation while maintaining high data compression as well as high resulting images, a motion compensated interframe prediction error is orthogonally transformed and then is subject to quantization. Thereafter, the quantized error signal undergoes inverse orthogonal transformation. In order to compensate for distortions caused by the quantization, a difference between the inversely orthogonally transformationed error signal and the original prediction error signal is quantized. By selecting the quantization characteristics, the influence or contribution of the orthogonal transformation can be controlled continuously.

摘要翻译： 为了在保持高数据压缩以及高成像图像的同时使用帧间相关编码图像信号，对运动补偿帧间预测误差进行正交变换，然后进行量化。 此后，经量化误差信号进行逆正交变换。 为了补偿由量化造成的失真，量化反向正交变换的误差信号与原始预测误差信号之间的差异。 通过选择量化特性，可以连续地控制正交变换的影响或贡献。

公开(公告)号：US4202011A

公开(公告)日：1980-05-06

申请号：US865147

申请日：1977-12-28

申请人： Toshio Koga

发明人： Toshio Koga

IPC分类号： G06T9/00 ,  H04N7/46 ,  H04N11/04 ,  H04N7/12

CPC分类号： H04N19/00 ,  H04N19/124 ,  H04N19/152 ,  H04N19/587 ,  H04N19/59 ,  H04N19/50

摘要： A television signal coder of the type which makes use of correlations to compress the amount of information transmitted. n fields are selected for every m fields (m, n being positive integers; m>n), and a predicted signal level for each picture element in the n fields is represented by an interpolated value of the respective spatially corresponding picture elements in the preceding and succeeding fields. The prediction error which is the difference between the interpolated value and each corresponding picture element is coded and transmitted. The signal for the remaining (m-n) fields are coded and transmitted according to conventional coding systems.

摘要翻译： 一种使用相关性来压缩发送的信息量的类型的电视信号编码器。 对于每个m个场（m，n是正整数; m> n）选择n个场，并且n个场中的每个像素的预测信号电平由前面的相应的空间对应的像素的内插值表示 和后续领域。 编码并发送作为内插值与每个对应的像素之间的差的预测误差。 剩余（m-n）场的信号根据常规编码系统进行编码和传输。

公开(公告)号：US5032905A

公开(公告)日：1991-07-16

申请号：US522026

申请日：1990-05-11

申请人： Toshio Koga

发明人： Toshio Koga

IPC分类号： G06T9/00 ,  G06T7/20 ,  H04N5/14

CPC分类号： H04N5/147 ,  G06T7/208 ,  H04N19/142 ,  H04N19/179 ,  H04N19/87 ,  H04N5/144

摘要： On detecting a drastic change, such as a scene change, between current and previous ones of successive pictures which are represented by a digital video signal and each of which comprises a predetermined number of picture elements, the digital video signal is processed by using correlations between the picture elements within each of the successive pictures to produce a processed signal which represents processed results for each of the successive pictures. A statistical distribution of the processed results is calculated from the processed signal. The statistical distribution of the processed results in the current picture is collated with the statistical distribution of the processed results in the previous picture to be produced as a change detection signal representative of the drastic change with reference to a relationship between the statistical distribution of the processed results in the current picture and the statistical distribution of the processed results in the previous picture. The processed signal may be obtained by producing a difference signal between the digital video signal and a prediction signal predictive of the digital video signal by using the correlations. Alternatively, an orthogonal transform is carried out for the digital video signal to produce the processed signal.

摘要翻译： 在检测由数字视频信号表示的每个连续画面中的当前和前一个之间的剧烈变化（例如场景变化），并且每个包括预定数量的像素时，通过使用数字视频信号之间的相关性来处理数字视频信号 每个连续图像内的图像元素，以产生处理的信号，其表示每个连续图像的处理结果。 根据处理后的信号计算处理结果的统计分布。 将当前图像中的处理结果的统计分布与要产生的前一图像中的处理结果的统计分布进行比较，作为代表激烈变化的变化检测信号，参考处理的统计分布 导致当前图片和上一图片中处理结果的统计分布。 可以通过使用相关性在数字视频信号和预测数字视频信号的预测信号之间产生差分信号来获得经处理的信号。 或者，对数字视频信号执行正交变换以产生处理的信号。

公开(公告)号：US4802006A

公开(公告)日：1989-01-31

申请号：US796682

申请日：1985-11-12

申请人： Kazumoto Iinuma ,  Toshio Koga ,  Akihiro Furukawa ,  Sakae Okubo ,  Hideo Hashimoto ,  Naoki Mukawa

发明人： Kazumoto Iinuma ,  Toshio Koga ,  Akihiro Furukawa ,  Sakae Okubo ,  Hideo Hashimoto ,  Naoki Mukawa

IPC分类号： H04N19/50 ,  H04N7/12

CPC分类号： H04N19/503

摘要： In a predictive encoder for use particularly in a conference television system, a signal processing unit is used in producing a prediction signal and comprises three prediction circuits (22, 23, 31) and a selection circuit (24) coupled to the prediction circuits. The prediction circuits are for producing an inframe, an interframe, and a background prediction signals, respectively. Those signals are produced by processing an original signal at instants which precede a current instant and are different from one another. The selection circuit is for selecting one of the inframe, the interframe, and the background prediction signals. Therefore, it is possible to produce the prediction signal suitably predictive of the original signal. The signal processing circuit serves equally well in a predictive decoder.

摘要翻译： 在特别是在会议电视系统中使用的预测编码器中，信号处理单元用于产生预测信号，并且包括三个预测电路（22,23,31）和耦合到预测电路的选择电路（24）。 预测电路分别用于产生帧间帧，帧间帧和背景预测信号。 这些信号通过在当前时刻之前的时刻处理原始信号而产生，并且彼此不同。 选择电路用于选择帧内，帧间和背景预测信号之一。 因此，可以产生适当地预测原始信号的预测信号。 信号处理电路在预测解码器中同样良好地工作。

公开(公告)号：US4710810A

公开(公告)日：1987-12-01

申请号：US708272

申请日：1985-03-05

申请人： Toshio Koga

发明人： Toshio Koga

IPC分类号： H04N19/50 ,  G06T9/00 ,  H04N7/12 ,  H04B1/66

CPC分类号： H04N19/51

摘要： A video signal compression circuit for encoding a video signal to reduce the quantity of video information that is transmitted without loss of information and a video signal decompressing circuit for recovering the video signal from its compressed coded form. The encoding circuit includes means for detecting the motion contained in the video signal to generate motion vectors which are representative of this motion. Each picture frame produced from the transmitted video signal is divided into many block units. The motion vectors are generated according to the order of the block units rather than according to the order in which the video signal is transmitted. Thereafter, the vectors are reconverted to the order of the input video signal. The input video signal and the converted motion vectors are used for generating a prediction error signal which indicates motion in the video signal. The prediction error signal is encoded using a variable length coding scheme. On the receiving end, a decoding circuit is used for reproducing the original video signal. The decoding circuit includes means for decoding the output of the coding means on the transmitter side to reproduce the prediction error signal. The reproduced prediction error signal is converted into an appropriate time sequence which matches that of the input video signal and then the input video signal is reproduced in response to the reconverted prediction error signal and the motion vectors which are received from the transmitter.

摘要翻译： 一种视频信号压缩电路，用于对视频信号进行编码，以减少在不丢失信息的情况下发送的视频信息的数量，以及用于从其压缩编码形式恢复视频信号的视频信号解压缩电路。 编码电路包括用于检测包含在视频信号中的运动以产生代表该运动的运动矢量的装置。 从发送的视频信号产生的每个图像帧被划分成多个块单元。 运动矢量根据块单位的顺序而不是根据发送视频信号的顺序生成。 此后，向量被转换为输入视频信号的顺序。 输入视频信号和转换的运动矢量用于产生指示视频信号中的运动的预测误差信号。 使用可变长度编码方案对预测误差信号进行编码。 在接收端，使用解码电路再现原始视频信号。 解码电路包括用于解码发射机侧的编码装置的输出以再现预测误差信号的装置。 再现的预测误差信号被转换成与输入视频信号相匹配的适当时间序列，然后响应于从转发器接收到的再转换预测误差信号和运动矢量再现输入视频信号。

公开(公告)号：US4562468A

公开(公告)日：1985-12-31

申请号：US493974

申请日：1983-05-12

申请人： Toshio Koga

发明人： Toshio Koga

IPC分类号： G06T9/00 ,  H04N19/50 ,  H04N7/13

CPC分类号： H04N19/567 ,  H04N19/124 ,  H04N19/152 ,  H04N19/503 ,  H04N19/51 ,  H04N19/50

摘要： In an adaptive predictive coding apparatus for coding an input television signal so as to perform predictive coding by determining an optimum prediction function among a plurality of prediction functions for each of a plurality of blocks obtained by dividing up a frame of the input television signal, each of the blocks having a plurality of picture elements, and to perform selection of quantizing characteristic and coding control such as subline and subsample coding, data necessary for representing a given prediction function of the plurality of prediction functions and data necessary for representing a prediction error amount per the block for the given prediction function are evaluated. Sums of evaluated data are compared to produce, on a block by block basis, one of the prediction functions which provides a minimal sum as an optimum prediction function.

摘要翻译： 在用于对输入电视信号进行编码的自适应预测编码装置中，通过对通过划分输入的电视信号的帧获得的多个块中的每个块确定多个预测函数中的最佳预测函数来执行预测编码， 具有多个图像元素的块，并且执行量化特性和诸如子线和子样本编码的编码控制的选择，用于表示多个预测函数的给定预测函数所需的数据和表示预测误差量所需的数据 对于给定预测函数的每个块进行评估。 比较评估数据的和，以逐块的方式产生提供最小和作为最佳预测函数的预测函数之一。

公开(公告)号：US4371895A

公开(公告)日：1983-02-01

申请号：US225401

申请日：1981-01-15

申请人： Toshio Koga

发明人： Toshio Koga

IPC分类号： G06T9/00 ,  H04N7/32 ,  H04N7/36 ,  H04N7/12

CPC分类号： H04N19/152 ,  H04N19/50 ,  H04N19/503 ,  H04N19/51

摘要： A coded video signal transmitting and receiving system comprises in combination a coding apparatus using a plurality of prediction functions and provided for a transmitter, a decoding apparatus provided for a receiver, and a coded signal transmission path, whereby a coded video signal transmitted from the coding apparatus via the transmission path is received at the decoding apparatus and decoded thereby. In the coding apparatus, from a video signal received in time series, two dimensional blocks each consisting of a plurality of picture elements which extend over a plurality of scanning lines are formed, and the video signal is delivered out in a different sequence from that of the input time series. A predictive error value per block with respect to arbitrary one of the plurality of prediction functions associated with each block is generated, and a prediction function to generate a subsequent prediction error value is designated by use of part or all of prediction error values. An optimum prediction function selected from prediction functions is determined after a predetermined time has elapsed to generate prediction signals for picture elements in the two-dimensional block sequentially in accordance with the optimum prediction function. In coding the input video signal, at least a signal representative of the optimum prediction function and the prediction error signal are compressed and transmitted via the transmission path to the decoding apparatus in which the compressed code signal is expanded for decoding.

摘要翻译： 编码视频信号发送和接收系统包括组合使用多个预测功能并提供给发射机的编码装置，为接收机提供的解码装置和编码信号传输路径，由此编码的视频信号从编码 通过传输路径的装置在解码装置处被接收并被解码。 在编码装置中，从时间序列接收的视频信号中，形成由多个沿着多条扫描线延伸的多个像素构成的二维块，并且以与 输入时间序列。 生成相对于与每个块相关联的多个预测函数中的任意一个的每块的预测误差值，并且通过使用预测误差值的一部分或全部来指定用于生成后续预测误差值的预测函数。 在经过预定时间之后确定从预测函数中选择的最佳预测函数，以根据最佳预测函数依次生成二维块中的图像元素的预测信号。 在对输入视频信号进行编码时，至少表示最佳预测功能的信号和预测误差信号经由传输路径被压缩并发送到其中压缩码信号被扩展以解码的解码装置。

公开(公告)号：US5550589A

公开(公告)日：1996-08-27

申请号：US334441

申请日：1994-11-04

申请人： Hirohisa Shiojiri ,  Toshio Koga

发明人： Hirohisa Shiojiri ,  Toshio Koga

IPC分类号： H04N7/08 ,  H04J3/16 ,  H04J3/22 ,  H04N7/081 ,  H04N7/12 ,  H04N7/24 ,  H04N7/52 ,  H04N7/58 ,  H04N11/02 ,  H04N19/00 ,  H04N19/102 ,  H04N19/115 ,  H04N19/126 ,  H04N19/15 ,  H04N19/172 ,  H04N19/423 ,  H04N19/46 ,  H04N19/503 ,  H04N19/70 ,  H04N19/85 ,  H04N19/91 ,  H04N21/234 ,  H04N21/2365 ,  H04N21/2368 ,  H04N21/434 ,  H04N21/44

CPC分类号： H04N21/23406 ,  H04N21/2365 ,  H04N21/2368 ,  H04N21/4341 ,  H04N21/4347

摘要： A method of adaptively multiplexing a plurality of video channel data is disclosed. A multiplexed data includes a plurality of frames each of which contains a plurality of sub-frames. The video channel data are adaptively allocated to the sub-frames. A memory occupancy value of a buffer, which is provided in each of a plurality of video channels, is determined. The buffer is arranged to receive the corresponding video information. A plurality of control signals are produced each of which indicates the memory occupancy value of the corresponding buffer. Following this, a look-up table is accessed which includes a plurality of video channel assignment data for assigning the video channel data to The sub-frames. Thus, one of the channel data assignment data is derived from the look-up table. The video channel data are then multiplexed using one of said channel data assignment data derived from the look-up table.

摘要翻译： 公开了一种自适应地复用多个视频信道数据的方法。 复用数据包括多个帧，每个帧包含多个子帧。 视频信道数据被自适应地分配给子帧。 确定在多个视频通道中的每一个中提供的缓冲器的存储器占用值。 缓冲器被布置成接收相应的视频信息。 产生多个控制信号，每个控制信号指示相应缓冲器的存储器占用值。 接下来，访问包括用于将视频频道数据分配给子帧的多个视频频道分配数据的查找表。 因此，从查找表中导出一个频道数据分配数据。 然后，使用从查找表导出的所述频道数据分配数据之一来复用视频频道数据。

公开(公告)号：US5424777A

公开(公告)日：1995-06-13

申请号：US294795

申请日：1994-08-25

申请人： Toshio Koga ,  Masayuki Okajima

发明人： Toshio Koga ,  Masayuki Okajima

IPC分类号： G06T9/00 ,  H04N19/89 ,  H04N7/30 ,  H04N7/32

CPC分类号： H04N19/89 ,  H04N19/61 ,  H04N19/619 ,  H04N19/107

摘要： A time-varying image signal coding apparatus including a local encoded signal being quantized by a quantizing circuit, and the quantized signal is selected when refreshing is to be accomplished, and subjected to code transform by a code transform circuit to be transmitted to a time-varying image signal decoding apparatus. The signal supplied from the quantizing circuit is a transform coefficient in the transform region, and this is divided into a plurality of groups to be refreshed on a group-by-group basis. The transfer control on a group-by-group basis when refreshing is to take place is accomplished with a control signal supplied from a switching control circuit, and this control signal also undergoes code transform by the code transform circuit to be transmitted to the time-varying image signal decoding apparatus. In the time-varying image signal decoding apparatus, in accordance with the switching control signal transmitted from the time-varying image signal coding apparatus, refreshing is achieved by such selection that the transform coefficient to be refreshed is directly written into a frame memory from a code inverse transform circuit. When a time-varying image signal is to be transferred by using interframe transform and transform coding, grouping is achieved by the units of transform coefficient, and frames are rewritten with each group independent of others.

摘要翻译： 一种时变图像信号编码装置，包括由量化电路量化的本地编码信号，并且在完成刷新时选择量化信号，并经过代码变换电路进行代码变换， 可变图像信号解码装置。 从量化电路提供的信号是变换区域中的变换系数，并且将其分组为要逐个刷新的多个组。 当通过从切换控制电路提供的控制信号来实现刷新时逐个进行基于组的传送控制，该控制信号也经过代码变换电路进行代码变换， 可变图像信号解码装置。 在时变图像信号解码装置中，根据从时变图像信号编码装置发送的切换控制信号，通过这样的选择来实现刷新，使得要刷新的变换系数被直接写入帧存储器 代码逆变换电路。 当通过使用帧间变换和变换编码来传送时变图像信号时，通过变换系数的单位实现分组，并且每个组都独立于其他组重写帧。

公开(公告)号：US4920426A

公开(公告)日：1990-04-24

申请号：US118128

申请日：1987-11-09

申请人： Yoshinori Hatori ,  Toshio Koga ,  Kiichi Matsuda ,  Naoki Mukawa

发明人： Yoshinori Hatori ,  Toshio Koga ,  Kiichi Matsuda ,  Naoki Mukawa

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30

CPC分类号： H04N19/14 ,  H04N19/126 ,  H04N19/132 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60 ,  H04N19/13 ,  H04N19/146 ,  H04N19/91

摘要： In an image coding system having a plurality of coding characteristics, such as quantization characteristics, information of a digital image signal sequence is monitored in each of a number of predetermined intervals by forming a histogram of a sequence of coefficients which is calculated from the digital image signal sequence in accordance with each of the coding characteristics. The amount of information is calculated by summing up the coefficients in relation to every one of the coding characteristics. An optimum one of the coding characteristics is indicated by the coding control circuit to code the coefficient sequence into a sequence of coded signals in accordance with the optimum coding characteristic. The coefficient sequence in each frame may be divided into a sequence of blocks each of which is judged to be either valid or invalid in relation to each coding characteristic. Results of judgement may be included in the amount of information.

摘要翻译： 在具有多个编码特性（诸如量化特性）的图像编码系统中，通过形成从数字图像计算出的系数序列的直方图来监视数字图像信号序列的信息，其数量以预定间隔的数量 信号序列根据每个编码特性。 通过将与每个编码特性相关的系数相加来计算信息量。 由编码控制电路指示最佳编码特性之一，根据最佳编码特性将系数序列编码为编码信号序列。 每个帧中的系数序列可以被划分为块序列，每个块的序列被判断为与每个编码特性有关或无效。 判断结果可能包括在信息量中。