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公开(公告)号：US5692103A
公开(公告)日：1997-11-25
申请号：US230140
申请日：1994-04-20
申请人： Philip Lockwood , Patrice Alexandre
发明人： Philip Lockwood , Patrice Alexandre
摘要： In the recognition phase, the signal originating from a sensor is processed to obtain parameters which are compared with those stored in a dictionary in the learning phases so as to recognize the voice structures uttered by the user in a noisy environment. The obtaining of the said parameters during the learning and recognition phases includes the formation of digital frames of predetermined length from the signal originating from the sensor, the transformation of each frame from the time domain to the frequency domain to obtain a spectrum X(i), and the application of an inverse transformation, from the frequency domain to the time domain, to the magnitude .vertline.X(i).vertline..sup..gamma., where .vertline.X(i).vertline. represents the modulus of the spectrum and .gamma. represents an appropriate exponent.
摘要翻译： 在识别阶段，处理来自传感器的信号，以获得与学习阶段中存储在字典中的信号进行比较的参数，以便在噪声环境中识别用户发出的声音结构。 在学习和识别阶段期间获得所述参数包括从源自传感器的信号形成预定长度的数字帧，从时域到频域的每个帧的变换以获得频谱X（i） ，以及从频域到时域的逆变换到量值| X（i）|的应用 γ，其中| X（i）| 表示光谱的模量，γ表示适当的指数。
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公开(公告)号：US20050254791A1
公开(公告)日：2005-11-17
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： The invention relates to a device for recoding images, using a given set throughout, from a video stream comprising image sequences initially coded according to at least one mode. The inventive device comprises: means of extracting information which is associated with the recoding of images, said information representing at least the complexity of recoding each image; means of extracting information, such as coding complexity information, which is associated with the initial coding of the images; means of calculating a ratio, called the complexity ratio, of the complexities of recoding images recoded previously using the aforementioned mode to the complexities of the initial coding of said images; means of updating a smoothed complexity ratio for said mode according to the complexity ratio; and means of recoding each image according to said mode by estimating the complexity of each image to be recoded as the product of the complexity of the initial coding of said image by the smoothed complexity ratio for said mode. The invention is suitable for MPEG-2 and H26L coding.
摘要翻译： 本发明涉及一种用于从包括根据至少一种模式最初编码的图像序列的视频流中整个使用给定的集合来重新编码图像的装置。 本发明的装置包括：提取与图像重新编码相关联的信息的装置，所述信息至少表示对每个图像进行编码的复杂度; 提取与图像的初始编码相关联的诸如编码复杂度信息的信息的装置; 将先前使用上述模式重新编码的图像的复原度的复合度的比率计算为所述图像的初始编码的复杂度的装置; 根据复杂度比，更新所述模式的平滑复杂度比的装置; 以及根据所述模式对每个图像进行编码的装置，通过估计要被重新编码的每个图像的复杂度，作为所述图像的初始编码的复杂度乘以所述模式的平滑复杂度比的乘积。 本发明适用于MPEG-2和H26L编码。
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公开(公告)号：US20050117644A1
公开(公告)日：2005-06-02
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：US20050031211A1
公开(公告)日：2005-02-10
申请号：US10488920
申请日：2002-08-22
申请人： Olivier Meur , Patrice Alexandre , Ludovic Noblet
发明人： Olivier Meur , Patrice Alexandre , Ludovic Noblet
CPC分类号： H04N19/87 , H04N19/107 , H04N19/114 , H04N19/142 , H04N19/177 , H04N19/179 , H04N19/61 , H04N19/80 , H04N19/82
摘要： The invention relates to a device and a method for coding video images by motion compensation. The device according to the invention incorporates incorporated means of coding and means of filtering. It comprises means of calculation of a recursivity coefficient as a function of an estimated noise level and of a prediction error, means of measurement of the intra-image correlation and of the inter-image correlation, means of selection of 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 means of coding of the current input image as a function of the type of coding selected.
摘要翻译： 本发明涉及一种通过运动补偿对视频图像进行编码的装置和方法。 根据本发明的装置结合了编码装置和滤波装置。 它包括作为估计噪声水平和预测误差的函数的递归系数的计算装置，图像内相关性和图像间相关性的测量装置，选择适用于 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的函数，并且作为估计的噪声电平的函数的装置，作为当前输入图像的编码的函数 选择的编码类型
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公开(公告)号：US06212233B1
公开(公告)日：2001-04-03
申请号：US09180255
申请日：1998-11-06
申请人： Patrice Alexandre , Claude Perron , Ludovic Noblet
发明人： Patrice Alexandre , Claude Perron , Ludovic Noblet
IPC分类号： H04N712
CPC分类号： H04N19/44 , H04N19/124 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/164 , H04N19/50 , H04N19/61
摘要： The invention relates to a process for coding digital data of a video sequence for its transmission and a variable bit rate. It is characterized in that the bit rate regulation in respect of the image at the instant n is performed as a function of a bit rate prediction in respect of the transmission channel for the instant n+&tgr;, &tgr; being a constant time between the instant of storage of an image in the buffer of the coder and the instant of output of this image from the buffer of the decoder.
摘要翻译： 本发明涉及用于对其发送的视频序列的数字数据进行编码和可变比特率的过程。其特征在于，根据比特率来执行相对于时刻n的图像的比特率调整 关于即时n +＆tgr，＆tgr的传输信道的预测 是在编码器的缓冲器中存储图像的时刻与从解码器的缓冲器输出该图像的时刻之间的恒定时间。
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