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1.发明授权Method and apparatus for detecting synchronization shift between original image and reproduced image of video signal 失效用于检测原始图像与视频信号的再现图像之间的同步偏移的方法和装置公开(公告)号：US06489988B1
公开(公告)日：2002-12-03
申请号：US09012858
申请日：1998-01-23
IPC分类号： H04N1702
CPC分类号： H04N17/06 , H04N17/004
摘要： This invention aims to provide a method and apparatus for detecting a synchronization shift in which the synchronization shift between an original image and a reproduced image can be accurately detected even if noises are generated by a video codec or the like. An original image sent out from an image source 1 has a sine wave for synchronization overwritten thereon in a frame memory. The image on which the sine wave has been overwritten is decoded in a codec and stored in another frame memory. The two images srored. in two frame memories are simultaneously started to be read out. From the image from the other frame memory, only the sine wave is extracted in a notch filter, subjected to an offset correction in an adder, and inputted to asynchronization shift detecting unit. The synchronization shift detecting unit uses the sine wave to detect line, frame and horizontal pixel shifts. Since a sine wave is used as a synchronization marker and only the sine wave is extracted in the notch filter, the synchronization shift can be accurately detected.
摘要翻译： 本发明的目的在于提供一种用于检测同步偏移的方法和装置，其中即使通过视频编解码器等产生噪声也能够准确地检测原始图像和再现图像之间的同步偏移。 从图像源1发送的原始图像在帧存储器中具有用于同步的正弦波。 已经覆盖了正弦波的图像以编码解码器解码并存储在另一个帧存储器中。 这两个图像被扫描。 同时开始在两帧存储器中读出。 从另一个帧存储器的图像中，只有在陷波滤波器中提取正弦波，在加法器中进行偏移校正，并输入到异步移位检测单元。 同步移位检测单元使用正弦波来检测线，帧和水平像素移位。 由于使用正弦波作为同步标记，并且仅在陷波滤波器中提取正弦波，因此可以准确地检测同步偏移。
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公开(公告)号：US06239834B1
公开(公告)日：2001-05-29
申请号：US08775876
申请日：1997-01-02
IPC分类号： H04N1700
CPC分类号： H04N17/004
摘要： An apparatus for evaluating digital picture quality, includes a SNR calculation module for calculating a SNR based upon differences between data of video picture to be evaluated and data of original video picture, a module for calculating a power of AC component of overall data of one of the video pictures in a frame, and a weighting module for weighting the calculated SNR based upon the calculated power of the AC component.
摘要翻译： 一种用于评估数字图像质量的装置，包括：SNR计算模块，用于基于要评估的视频图像的数据与原始视频图像的数据之间的差异来计算SNR;模块，用于计算以下之一的总体数据的AC分量的功率; 帧中的视频图像，以及用于基于所计算的AC分量的功率对所计算的SNR进行加权的加权模块。
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3.发明授权
公开(公告)号：US5568196A
公开(公告)日：1996-10-22
申请号：US422059
申请日：1995-04-14
IPC分类号： G06T5/00 , G06T7/20 , G06T9/00 , H04N5/21 , H04N11/04 , H04N19/117 , H04N19/137 , H04N19/139 , H04N19/182 , H04N19/189 , H04N19/196 , H04N19/423 , H04N19/46 , H04N19/50 , H04N19/503 , H04N19/51 , H04N19/60 , H04N19/61 , H04N19/625 , H04N19/70 , H04N19/80 , H04N19/85 , H04B7/12
CPC分类号： H04N5/21 , H04N19/527 , H04N19/61 , H04N19/82 , H04N19/86
摘要： An accurate motion vector is locally estimated in a moving image, and motion compensation is performed on the image in the immediately preceding frame based on the motion vector obtained. Next, a low pass filter is applied between the current frame and the immediately preceding frame that has been motion compensated. By controlling the filter coefficient in pixel units when the filter is applied, blurring of a moving image is suppressed to a minimum while noise is largely reduced.
摘要翻译： 在运动图像中局部地估计准确的运动矢量，并且基于所获得的运动矢量对前一帧中的图像执行运动补偿。 接下来，在当前帧和已经被运动补偿的前一帧之间施加低通滤波器。 通过在施加滤波器时以像素为单位来控制滤波器系数，将噪声大大降低时，运动图像的模糊被抑制到最小。
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4.发明授权Direct encoding system of composite video signal using inter-frame motion compensation 失效使用帧间运动补偿的复合视频信号的直接编码系统
公开(公告)号：US5475430A
公开(公告)日：1995-12-12
申请号：US245042
申请日：1994-05-17
申请人： Takahiro Hamada , Shuichi Matsumoto
发明人： Takahiro Hamada , Shuichi Matsumoto
IPC分类号： H04N19/50 , G06F17/14 , H04N5/14 , H04N11/04 , H04N19/107 , H04N19/134 , H04N19/136 , H04N19/147 , H04N19/196 , H04N19/423 , H04N19/503 , H04N19/51 , H04N19/523 , H04N19/59 , H04N19/60 , H04N19/61 , H04N19/85 , H04N19/91 , H04N19/93 , H04N11/06
CPC分类号： H04N5/145 , H04N11/044 , H04N19/619
摘要： Direct encoding of composite video signal which includes both luminance signal (Y) and chrominance signal (C) is carried out without separating luminance signal from chrominance signal. A motion of a block in a frame (8) which provides a motion vector (MV.sub.x, MV.sub.y), and a from a preceding frame is detected in a motion detector reference block is defined in said preceding frame which is locally decoded according to said motion vector. A block to be encoded in a current frame is converted through Hadamard conversion H (1). A composite motion compensation (7) provides a prediction block according to said reference block, which is subject to phase compensation of color sub-carrier, according to remainder of the value MV.sub.x +MV.sub.y when said value is divided by 4assuming that sampling frequency of video signal is four times as high as color sub-carrier frequency. The difference (9) of each element between output matrix of said Hadamard conversion (1) and matrix of said prediction block is quantized (2) and encloded (3). The encoded output is transmitted together with said motion vector. Thus, composite video signal is encoded directly signal, and excellent signal quality with high compression ratio is obtained.
摘要翻译： 包括亮度信号（Y）和色度信号（C）两者的复合视频信号的直接编码在不分离亮度信号与色度信号的情况下进行。 在运动检测器参考块中检测到提供运动矢量（MVx，MVy）和前一帧的帧（8）中的块的运动被定义在根据所述运动进行局部解码的所述先前帧中 向量。 在当前帧中编码的块通过Hadamard转换H（1）进行转换。 复合运动补偿（7）根据所述参考块提供预测块，该参考块根据颜色副载波的相位补偿，根据值MVx + MVy的剩余值，当所述值除以4，视频的采样频率 信号是彩色副载波频率的四倍。 将所述Hadamard转换（1）的输出矩阵与所述预测块的矩阵之间的每个元素的差（9）量化（2）并包围（3）。 编码输出与所述运动矢量一起发送。 因此，复合视频信号被直接编码信号，并且获得具有高压缩比的优良信号质量。
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公开(公告)号：US06546054B1
公开(公告)日：2003-04-08
申请号：US09501720
申请日：2000-02-10
IPC分类号： H04N712
摘要： An input video signal is distributed to two links. The distributed video signals are coded by encoders in a spacewise or timewise shifted manner, and then, are transmitted over the transmission links. On a receiving side, the video signals are decoded by decoders, respectively. An averaging processor determines an average of the video signals per pixel, and then, outputs it. A data selector selects an output from the averaging processor when the plural links are operated normally; to the contrary, it selects a decoded output on the normal link in the case where an accident occurs in any one of the plural links. Specific methods for shifting the video signals spacewise or timewise include: a method for shifting a timing of intra-frame coding; a method for shifting the video signals on the links by several pixels or lines at least one of upward, downward, rightward and leftward; a method for disposing a sampling conversion filter in at least one of the links; and the like. According to the present invention, it is possible to provide a video transmission system using the plural links in which the transmission capacity of a backup link can be effectively used while high reliability of transmission can be ensured.
摘要翻译： 输入视频信号被分配到两个链路。 分布式视频信号由编码器以空间或时间移位的方式编码，然后通过传输链路传输。 在接收侧，视频信号分别由解码器解码。 平均处理器确定每像素的视频信号的平均值，然后输出。 当多个链路正常运行时，数据选择器选择平均处理器的输出; 相反，在多个链接中的任何一个中发生事故的情况下，在正常链路上选择解码输出。 用于将视频信号空间或时间移位的具体方法包括：移动帧内编码定时的方法; 用于将链路上的视频信号向上，向下，向右和向左移动至少一个的方法， 一种在至少一个链路中设置采样转换滤波器的方法; 等等。 根据本发明，可以提供使用多个链路的视频传输系统，其中可以有效地使用备用链路的传输容量，同时可以确保传输的高可靠性。
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公开(公告)号：US5557276A
公开(公告)日：1996-09-17
申请号：US281294
申请日：1994-07-27
IPC分类号： H04N5/14 , H04N1/40 , H04N1/41 , H04N19/00 , H04N19/126 , H04N19/136 , H04N19/169 , H04N19/19 , H04N19/196 , H04N19/44 , H04N19/59 , H04N19/63 , H04N19/80 , H04N19/85 , H03M1/00
CPC分类号： H04N19/86 , H04N19/126 , H04N19/527 , H04N19/124 , H04N19/60
摘要： A quantizer designed by using human visual sensitivity is disclosed, in which when postprocessing is done after inverse quantization an optimum visual sensitivity function for a system involving the postprocessing is obtained for doing quantization by using that visual sensitivity function.Where the postprocessing that is executed after the inverse quantization consists of a filtering process with a characteristic L(.omega.) (.omega. being the frequency) and a 1:2 interpolation process, denoting the optimum visual sensitivity as the output result by W(.omega.) as shown in FIG. 2, the optimum equivalent sensitivity function W'(.omega.) is given asW'(.omega.)=1/2[L(.omega./2)W(.omega./2)+L(.omega./2+.pi.)W(.omega./2+.pi.)].By using this equivalent sensitivity function W'(.omega.) for the quantizer, it is possible to obtain a visually optimum quantizer designed by using human visual sensitivity.
摘要翻译： 公开了通过使用人类视觉灵敏度设计的量化器，其中当在逆量化后进行后处理时，通过使用该视觉灵敏度函数来获得涉及后处理的系统的最佳视觉灵敏度功能进行量化。 在逆量化后执行的后处理由具有特征L（ω）（ω为频率）和1：2内插处理的滤波处理构成，表示作为W（ω）的输出结果的最佳视觉灵敏度， 如图1所示。 如图2所示，最优等效灵敏度函数W'（ω）被给出为W'（ω）= + E，fra 1/2 + EE [L（ω/ 2）W（ω/ 2）+ L（ω/ pi）W（ω/ 2 + pi）]。 通过使用量化器的这种等效灵敏度函数W'（ω），可以获得通过使用人类视觉灵敏度设计的视觉最佳量化器。
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公开(公告)号：US6141449A
公开(公告)日：2000-10-31
申请号：US59356
申请日：1998-04-13
IPC分类号： H04N19/50 , G06T9/00 , H03M7/36 , H04N19/107 , H04N19/126 , H04N19/136 , H04N19/137 , H04N19/147 , H04N19/149 , H04N19/152 , H04N19/176 , H04N19/196 , H04N19/423 , H04N19/503 , H04N19/51 , H04N19/567 , H04N19/61 , H04N19/625 , G06K9/00
CPC分类号： G06T9/007
摘要： This invention provides a mode determination system for maximizing the coding efficiency by minimizing the amount of generated encoded information. An intra-frame picture signal X of 16 pels 16 lines is divided into four sub-blocks of 8 pels.times.8 lines by a DCT block dividing unit. A DCT block dispersion calculation unit calculates the dispersions of the four sub-blocks, and a nonlinear function transform unit transforms the dispersions to values for estimating amounts of generated encoded information. An adder unit adds together the four values for estimating amounts of generated encoded information and outputs the sum. On the other hand, a motion compensated predictive difference Y of 16 pels.times.16 lines undergoes a processing similar to said intra-frame picture signal X by a DCT block dividing unit, a DCT block dispersion calculation unit, a nonlinear function transform unit and an adder unit, and a value for estimating an amount of generated encoded information for the motion compensated predictive difference Y is outputted from the adder unit. An comparator unit outputs a signal for selecting a mode according to which of the two values for estimating amounts of generated encoded information is smaller.
摘要翻译： 本发明提供一种模式确定系统，用于通过最小化生成的编码信息的量来最大化编码效率。 16像素16行的帧内图像信号X被DCT块分割单元划分为8个像素×8行的4个子块。 DCT块色散计算单元计算四个子块的色散，并且非线性函数变换单元将色散变换为用于估计生成的编码信息的量的值。 加法器单元将用于估计所生成的编码信息的量的四个值相加，并输出该和。 另一方面，16像素×16行的运动补偿预测差Y由DCT块分割单元，DCT块色散计算单元，非线性函数变换单元和加法器单元进行类似于所述帧内图像信号X的处理 并且从加法器单元输出用于估计运动补偿预测差Y的生成编码信息量的值。 比较器单元输出用于选择模式的信号，根据用于估计所生成的编码信息的量的两个值中的哪一个较小的模式。
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公开(公告)号：US5699499A
公开(公告)日：1997-12-16
申请号：US498400
申请日：1995-07-05
CPC分类号： G06T7/2013 , H04N19/51 , H04N19/80 , H04N5/145 , H04N7/014 , G06T2207/10016
摘要： It is sought to provide a motion vector post-processor, which can improve motion vectors of blocks containing boundaries of objects in different movements to provide as visually satisfactory interpolated field quality as possible. Motion vectors generated in a motion estimator are stored in a memory, and their magnitudes are calculated in a magnitude calculator. Magnitude data is fed to an order statistics filter. The filter detects the serial number of a motion vector (for instance third motion vector) less than a magnitude at the center among a plurality of (for instance nine) input motion vectors and outputs corresponding serial number data to the memory. The memory outputs the vector corresponding to the input serial number data to a field interpolator. According to the invention, it is possible to provide a motion vector of an area containing small movement as motion vector of a block containing mixed movements.
摘要翻译： 寻求提供运动矢量后处理器，其可以改善包含不同运动中物体边界的块的运动矢量，以提供尽可能视觉上令人满意的内插场质量。 在运动估计器中生成的运动矢量存储在存储器中，并且它们的幅度在幅度计算器中计算。 幅度数据被馈送到订单统计过滤器。 滤波器检测小于多个（例如九个）输入运动矢量中的中心的幅度的运动矢量（例如第三运动矢量）的序列号，并将相应的序列号数据输出到存储器。 存储器将对应于输入序列号数据的矢量输出到场插值器。 根据本发明，可以提供包含小移动的区域的运动矢量作为包含混合运动的块的运动矢量。
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9.发明授权Video quality evaluating equipment for reproduced image of video signal subject to digital compression 失效用于数字压缩的视频信号的再现图像的视频质量评估设备
公开(公告)号：US5574500A
公开(公告)日：1996-11-12
申请号：US542356
申请日：1995-10-12
申请人： Takahiro Hamada , Shuichi Matsumoto
发明人： Takahiro Hamada , Shuichi Matsumoto
IPC分类号： H04N19/60 , H04N17/00 , H04N17/06 , H04N19/423 , H04N19/625 , H04N19/70
CPC分类号： H04N17/06 , H04N17/004
摘要： A sync controller 14 controls an amount of delay of a delay part 15 so that original video data entered from a video source 1 is synchronized with reproduced video data which is compressed and reproduced by a system to be evaluated. A first OT calculator 17 orthogonally transforms a reproduced image, a second OT calculator 21 orthogonally transforms an original image and a subtractor 19 obtains a difference value of the same order coefficients in one block. A WSNR calculator 22 weights the difference with a weighting function which varies with a position of a coefficient of orthogonally transformed data and a magnitude of an AC power in the block after orthogonal transform of the original image and subsequently obtains an average weighted S/N ratio of each video frame or a plurality of video frames. Finally, a subjective evaluation value calculator 23 calculates a subjective evaluation value (deterioration percentage) according to the average weighted S/N ratio. Consequently, the present invention enables to provide a video quality evaluating equipment for a reproduced image of a video signal subject to digital compression capable of economically evaluating the video quality in a short period of time.
摘要翻译： 同步控制器14控制延迟部分15的延迟量，使得从视频源1输入的原始视频数据与被评估的系统压缩和再现的再现视频数据同步。 第一OT计算器17对再现图像进行正交变换，第二OT计算器21对原始图像进行正交变换，减法器19获得一个块中相同阶数系数的差分值。 WSNR计算器22对与原始图像的正交变换后的正交变换数据的位置和交流电力的大小变化的加权函数进行加权，并随后获得平均加权的S / N比 的每个视频帧或多个视频帧。 最后，主观评价值计算部23根据平均加权S / N比计算主观评价值（恶化百分比）。 因此，本发明能够提供一种用于经受数字压缩的视频信号的再现图像的视频质量评估设备，能够在短时间内经济地评估视频质量。
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公开(公告)号：US5576766A
公开(公告)日：1996-11-19
申请号：US329530
申请日：1994-10-26
IPC分类号： H04N19/50 , G06T9/00 , H03M7/30 , H04N19/107 , H04N19/136 , H04N19/149 , H04N19/169 , H04N19/176 , H04N19/18 , H04N19/189 , H04N19/196 , H04N19/423 , H04N19/46 , H04N19/503 , H04N19/59 , H04N19/60 , H04N19/61 , H04N19/625 , H04N19/63 , H04N19/70 , H04N7/32 , H04N7/30
CPC分类号： H04N19/48 , H04N19/149 , H04N19/176 , H04N19/18 , H04N19/61 , H04N19/63 , H04N19/107 , H04N19/146
摘要： A moving picture encoder which is able to improve the encoding efficiency wherein a controller controls an inter/intra mode switch for generating intra and inter signals Y2 and Y4, these signals being stored in a memory. A combining unit generates a combination pattern from the intra and inter signals Y2 and Y4 stored in the memory. An information amount estimator estimates the information amounts concerning the signals Y2 and Y4 and combination pattern. A minimum information amount determining unit determines the minimum one of the estimated information amounts. The controller causes a selector to select the signal or combination pattern that corresponds to the minimum information amount for quantizing and transmitting the result to a succeeding stage.
摘要翻译： 一种运动图像编码器，其能够提高编码效率，其中控制器控制用于产生帧内和帧间信号Y2和Y4的帧间/帧内模式切换，这些信号被存储在存储器中。 组合单元从存储在存储器中的帧内和帧间信号Y2和Y4生成组合模式。 信息量估计器估计与信号Y2和Y4有关的信息量和组合模式。 最小信息量确定单元确定估计信息量中的最小值。 控制器使选择器选择对应于最小信息量的信号或组合模式，用于量化并将结果发送到后续阶段。
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