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    • 2. 发明公开
    • A METHOD FOR CODING A SEQUENCE OF DIGITAL IMAGES
    • 方法编码数字图像序列
    • EP2904780A1
    • 2015-08-12
    • EP12815666.8
    • 2012-12-18
    • Siemens Aktiengesellschaft
    • WIGE, EugenAMON, PeterKAUP, AndréHUTTER, Andreas
    • H04N19/00H04N19/593
    • H04N19/182H04N19/105H04N19/137H04N19/14H04N19/593
    • The invention refers to a method for coding a sequence of digital images (I), wherein the method uses a number of prediction modes for predicting values of pixels (P1) in the images (I) based on reconstructed values of pixels in image areas processed previously, where a prediction error (PE) between predicted values and the original values of pixels (P1) is processed for generating the coded sequence of digital images (CI). The invention is characterized in that a preset prediction mode (NLM) is an intra-prediction mode based on pixels of a single image (I), in which preset prediction mode (NLM). In a step i), for a region (R) of pixels with reconstructed values in the single image (I) and for a template (TE) of an image area, a first patch (PA1) of pixels in the region (R) which surround a first pixel (P1) to be predicted based on the template (TE) is compared with several second patches (PA2), each second patch (PA2) being assigned to a second pixel (P2) in the region (R) and consisting of pixels in the region (R) which surround the second pixel (P2) based on the template (TE), thereby determining a similarity measure (SM) for each second pixel (P2) describing the similarity between reconstructed values of the pixels of the second patch (PA2) assigned to the respective second pixel (P2) and the reconstructed values of the pixels of the first patch (PA1). In a step ii), a predicted value of each first pixel (PI) is determined based on a weighted sum of values of the second pixels (P2), where the value of each second pixel (P2) is weighted by a weighting factor which is monotonously decreasing in dependency on a decreasing similarity described by the similarity measure (SM) for the respective second pixel (P2).
    • 5. 发明公开
    • METHOD FOR PROCESSING A COMPRESSED VIDEO STREAM
    • VERFAHREN ZUR VERARBEITUNG EINES KOMPRIMIERTEN VIDEOSTROMS
    • EP2619982A2
    • 2013-07-31
    • EP12705232.2
    • 2012-01-16
    • Siemens Aktiengesellschaft
    • LAUMER, MarcusAMON, PeterHUTTER, AndreasKAUP, André
    • H04N7/18
    • H04N19/48H04N5/147H04N19/146H04N19/172H04N19/188H04N19/87
    • For a compressed video stream formed of a sequence of compressed data packets, each compressed packet is assigned to a frame by processing the undecoded data packet. A frame includes packets. A first plurality of frames is assigned to a first sliding window and a second plurality of frames is assigned to a second sliding window. The first and second sliding windows have different frames. A first window indicator is calculated by determining a first indicator representing an average number of packets per frame within the first window, and/or a second indicator representing size information of the data within the first window. A second window indicator is calculated by determining a third indicator representing an average number of packets per frame within the second window, and/or a fourth indicator representing size information of the data within the second window. The first and the second window indicators are compared.
    • 对于由压缩数据分组序列形成的压缩视频流,通过处理未解码的数据分组将每个压缩分组分配给一帧。 帧包括数据包。 第一多个帧被分配给第一滑动窗口,并且第二多个帧被分配给第二滑动窗口。 第一和第二滑动窗口具有不同的框架。 通过确定第一指示符来计算第一窗口指示符,该第一指示符表示第一窗口内的每帧的平均数量,和/或表示第一窗口内的数据的大小信息的第二指示符。 通过确定表示第二窗口内的每帧的平均分组数量的第三指示符和/或表示第二窗口内的数据的大小信息的第四指示符来计算第二窗口指示符。 比较第一和第二窗口指标。