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公开(公告)号：US07561568B2
公开(公告)日：2009-07-14
申请号：US11154915
申请日：2005-06-16
IPC分类号： H04L12/56
CPC分类号： H04N21/23655
摘要： A multiplexing device is coupled to various coding devices. The multiplexing device does not attempt to mutually synchronize the various coding devices but, instead, circumvents such synchronization while making it possible to work with the various coding devices and to obtain synchronous actions at the input of the multiplexer. In particular, the multiplexing device transmits control commands and an instant of action to each of the coding devices.
摘要翻译： 多路复用装置耦合到各种编码装置。 复用装置不试图使各种编码装置相互同步，而是避免这样的同步，同时使得可以与各种编码装置一起工作并且在多路复用器的输入端获得同步动作。 具体地，复用装置向每个编码装置发送控制命令和动作时刻。
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公开(公告)号：US20060002410A1
公开(公告)日：2006-01-05
申请号：US11154915
申请日：2005-06-16
CPC分类号： H04N21/23655
摘要： The invention relates to a method and a device for multiplexing. The device is able to receive data packets from at least one coding device, some of the data packets comprising a time label, said device comprising a time reference and being able to transmit commands to the said coding device. According to the invention, the device is characterized in that it comprises: means for calculating an instant of action for the coding device at which it desires that the coding device perform the said command as a function of the instant at which it transmits the said command to the said coding device, of the time label of the data packets, of its time reference and of the maximum transfer time between the coding device and the multiplexing device, means for transmitting said instant of action and the said command to the coding device.
摘要翻译： 本发明涉及一种复用方法和装置。 该设备能够从至少一个编码设备接收数据分组，一些数据分组包括时间标签，所述设备包括时间参考，并且能够向所述编码设备发送命令。 根据本发明，该装置的特征在于：它包括：用于计算编码装置的动作时刻的装置，其中期望编码装置根据其发送所述命令的时刻执行所述命令 向所述编码装置发送数据分组的时间标签及其时间参考和编码装置与多路复用装置之间的最大传送时间的装置，用于将所述动作时刻和所述命令发送到编码装置的装置。
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公开(公告)号：US07907666B2
公开(公告)日：2011-03-15
申请号：US10504105
申请日：2003-02-10
CPC分类号： H04N19/40 , H04N19/105 , H04N19/126 , H04N19/14 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/177 , H04N19/61
摘要： Image sequences are advantageously recoded based on an evaluation of complexities before and after trans-coding of the images. Initially, information is extracted representing at least the complexity of recoding each image. A complexity ratio is calculated in accordance with the complexities of images recoded previously using the aforementioned mode to the complexities of the initial coding of said images. After smoothing the complexity ratio undergoes updating. Each image is recoded according to the mode by estimating the complexity of each image to be recoded as the product of the complexity of the initial coding of the image by the smoothed complexity ratio for the mode.
摘要翻译： 基于对图像的转码之前和之后的复杂度的评估，有利地重新编码图像序列。 首先，提取代表每个图像重新编码的复杂度的信息。 根据先前使用上述模式重新编码的图像的复杂度与所述图像的初始编码的复杂度来计算复杂度比。 平滑后，复杂性比例会更新。 根据该模式，通过估计要被重新编码的每个图像的复杂度作为图像的初始编码的复杂度乘以该模式的平滑复杂度比的乘积，根据该模式重新编码。
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公开(公告)号：US07245782B2
公开(公告)日：2007-07-17
申请号：US10433805
申请日：2001-11-23
IPC分类号： G06K9/40
CPC分类号： H04N5/21
摘要： The invention relates to a process, to a device for smoothing dark regions of images and to a coding system. a noise level is associated with each image and a luminance value is associated with each pixel, a threshold value is calculated, at least two values delimiting a smoothing range are defined, for each current pixel, the luminance of the pixel is compared with the said values, if the luminance of the current pixel lies in a smoothing range, the luminance of several pixels in an analysis window is compared with the said values, if the luminance of certain pixels lies in the same range as the value of the luminance of the current pixel, the value of the luminance of the current pixel is modified as a function of the said threshold values.
摘要翻译： 本发明涉及一种用于平滑图像暗区和编码系统的装置的处理。 噪声电平与每个图像相关联，并且亮度值与每个像素相关联，计算阈值，为每个当前像素定义限定平滑范围的至少两个值，将像素的亮度与所述 值，如果当前像素的亮度在平滑范围内，则将分析窗口中的几个像素的亮度与所述值进行比较，如果某些像素的亮度处于与像素的亮度值相同的范围内 当前像素，当前像素的亮度值被修改为所述阈值的函数。
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公开(公告)号：US07379604B2
公开(公告)日：2008-05-27
申请号：US10488920
申请日：2002-08-22
CPC分类号： H04N19/87 , H04N19/107 , H04N19/114 , H04N19/142 , H04N19/177 , H04N19/179 , H04N19/61 , H04N19/80 , H04N19/82
摘要： A device and a method for coding video images by motion compensation. The device incorporates a coding unit and a filtering unit. A calculation unit for calculating a recursivity coefficient as a function of an estimated noise level and a prediction error, a measurement unit for measuring the intra-image correlation and the inter-image correlation, a selection unit for selecting a type of coding applied to the current input image as a function at least of the measurements of the inter-image correlation and of the measurements of the intra-image correlation and as a function of the estimated noise level, a coding unit for coding the current input image as a function of the type of coding selected.
摘要翻译： 一种通过运动补偿对视频图像进行编码的装置和方法。 该装置包括编码单元和滤波单元。 一种用于计算作为估计噪声电平和预测误差的函数的递归系数的计算单元，用于测量图像内相关性和图像间相关性的测量单元，选择单元，用于选择应用于 当前输入图像至少作为图像间相关性的测量和图像内相关性的测量和作为估计的噪声电平的函数的函数，编码单元，用于将当前输入图像编码为 选择的编码类型。
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6.发明授权Device and process for regulating bit rate in system for the statistical multiplexing of image streams coded according to MPEG2 coding 有权用于调整系统中比特率的装置和处理，用于根据MPEG2编码编码的图像流的统计复用公开(公告)号：US06654416B1
公开(公告)日：2003-11-25
申请号：US09520205
申请日：2000-03-07
IPC分类号： H04B166
CPC分类号： H04N21/23655 , H04N19/115 , H04N19/126 , H04N19/14 , H04N19/142 , H04N19/149 , H04N19/152 , H04N19/172 , H04N19/177 , H04N19/179 , H04N19/61 , H04N19/85 , H04N19/87
摘要： A device for regulating bit rate in a system for statistically multiplexing several streams of MPEG 2 coded images is disclosed. The statistical multiplexing system includes a device (1) for allocating bit rate using the complexity calculated by a bit rate regulating device (10). Each coder E(i) of an image stream includes a first coding device (20) for performing spatial coding, a second coding device and a memory for storing the complexity X1st| of the last image coded spatially by the first coding device. The complexity (X−GOP) of the last group of pictures is coded by the second coding device (30). Device (10) regulates the bit rate of coder E(i) for determining the complexity value for the next image coded by the second coding device (30), using stored complexity values. This complexity value is transmitted to the bit rate allocator (1) to determine the next bit rate sent to the coder E(i).
摘要翻译： 公开了一种用于调节系统中用于统计复用多个MPEG 2编码图像数据流的比特率的装置。 统计复用系统包括用于使用比特率调节装置（10）计算的复杂度来分配比特率的装置（1）。 图像流的每个编码器E（i）包括用于执行空间编码的第一编码装置（20），第二编码装置和用于存储复杂度X 1的存储器。 由第一编码装置在空间上编码的最后图像。 第二编码装置（30）对最后一组图像的复杂度（X
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7.发明授权Method of coding a video image stream with a view for subsequent recoding using the same type of code 有权使用相同类型的代码对视频图像流进行编码以便后续重新编码的视图的方法公开(公告)号：US07733954B2
公开(公告)日：2010-06-08
申请号：US10296069
申请日：2001-05-09
申请人： Patrice Alexandre , Jean Chatel
发明人： Patrice Alexandre , Jean Chatel
IPC分类号： H04N7/26
摘要： The invention lies within the area of image compression coding, in particular of MPEG type, which uses recoding help data. The invention affords a solution for reusing the help data selectively. To this end, the invention adjoins an electronic signature representative of the constraints of the coder. Thus, it becomes possible to determine whether the help data are reusable or not for a subsequent coding using other constraints.
摘要翻译： 本发明在图像压缩编码领域，特别是使用重新编码帮助数据的MPEG类型的领域。 本发明提供了一种用于有选择地重用帮助数据的解决方案。 为此，本发明与编码器的约束的电子签名相邻。 因此，可以确定帮助数据是否可重用于使用其他约束的后续编码。
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公开(公告)号：US07577196B2
公开(公告)日：2009-08-18
申请号：US10884158
申请日：2004-07-02
CPC分类号： H04N19/177 , H04N19/107 , H04N19/112 , H04N19/114 , H04N19/124 , H04N19/137 , H04N19/14 , H04N19/147 , H04N19/149 , H04N19/172 , H04N19/61
摘要： The invention relates to a device for coding video frame sequences, comprising means (1) for measuring the spatial activity of the video frames to be coded, means (1) for measuring the temporal activity of the video frames to be coded, means (2) for coding the frames as a frame structure or as a field structure. According to the invention, the means (2) for coding the frames as a frame structure or as a field structure are able to choose the field or frame structure dynamically as a function of the measurements of spatial and temporal activity of the said frame.
摘要翻译： 本发明涉及一种用于编码视频帧序列的装置，包括用于测量要编码的视频帧的空间活动的装置（1），用于测量要编码的视频帧的时间活动的装置（1），装置 ），用于将帧编码为帧结构或作为场结构。 根据本发明，用于将帧编码为帧结构或场结构的装置（2）能够根据所述帧的空间和时间活动的测量动态地选择场或帧结构。
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公开(公告)号：US06229925B1
公开(公告)日：2001-05-08
申请号：US09081447
申请日：1998-05-19
IPC分类号： G06K936
CPC分类号： H04N19/87 , H04N19/114 , H04N19/137 , H04N19/14 , H04N19/142 , H04N19/146 , H04N19/15 , H04N19/159 , H04N19/177 , H04N19/179 , H04N19/61 , H04N19/80 , H04N19/85
摘要： The invention relates to a device for pre-processing video images intended to be coded in the MPEG 2 format. The MPEG 2 standard provides that, mode which exploits the spatial redundancy of the images. The images thus coded then define a succession of groups of images, a group of images being referred to as a GOP. The pre-processing device according to the invention comprises an image memory and an analysis circuit. The image memory makes it possible to store the various images contained in the forecast GOP of rank ok and ax of the first few images contained in the GOP of rank ok+l, ax being an integer greater than or equal to 1. The analysis circuit is linked to the image memory and makes it possible to perform measurements on the images contained therein. The knowledge about the images of the GOP of rank and about the first images of the forecast GOP of rank k+1 which is ascertained following the above mentioned measurements is then used for coding the GOP of rank k. The invention applies to systems for coding images according to the MPEG 2 standard.
摘要翻译： 本发明涉及一种用于预处理以MPEG2格式编码的视频图像的装置。 MPEG 2标准提供了利用图像的空间冗余的模式。 因此，如此编码的图像定义了一组连续的图像，一组图像被称为GOP。根据本发明的预处理装置包括图像存储器和分析电路。图像存储器使得可以存储 包含在秩ok的预测GOP中的各种图像和包含在等级ok + l的GOP中的前几个图像的ax，ax是大于或等于1的整数。分析电路链接到图像存储器 可以对其中包含的图像执行测量。 关于GOP的等级图像和关于按照上述测量确定的秩k + 1的预测GOP的第一图像的知识然后被用于对等级k的GOP进行编码。本发明适用于编码的系统 图像根据MPEG 2标准。
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公开(公告)号：US07082167B2
公开(公告)日：2006-07-25
申请号：US10096707
申请日：2002-03-13
申请人： Patrice Alexandre , Xavier Ducloux , Gildas Guelou
发明人： Patrice Alexandre , Xavier Ducloux , Gildas Guelou
IPC分类号： H04N7/12
CPC分类号： H04N21/23655 , H04N19/115 , H04N19/126 , H04N19/14 , H04N19/15 , H04N19/154 , H04N19/176 , H04N19/61 , H04N21/23614
摘要： The present invention relates to a method and a device for monitoring the quality of video data having to undergo coding and decoding, making it possible to maintain predetermined constant quality of the video data after decoding. The method is such that information representing the complexity of video data to be coded is received from at least one coder. For each video-data item to be coded, a reference quantization value is calculated as a function of the complexity. For each video-data item to be coded, a reference throughput calculated as a function of the reference quantization value and of the value of the predetermined constant quality is calculated and transmitted to the coder, allowing the coder to code each video data item so as to obtain video data at the predetermined quality, after decoding.
摘要翻译： 本发明涉及用于监视经过编码和解码的视频数据的质量的方法和装置，使得可以在解码之后维持预定的视频数据的恒定质量。 该方法是从至少一个编码器接收表示要被编码的视频数据的复杂度的信息。 对于要编码的每个视频数据项，根据复杂度来计算参考量化值。 对于要编码的每个视频数据项，计算作为参考量化值和预定恒定质量值的函数计算的参考吞吐量并将其发送到编码器，从而允许编码器对每个视频数据项进行编码，以便 在解码之后以预定质量获得视频数据。
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