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    • 2. 发明公开
    • DATA COMPRESSION FOR VIDEO
    • 数据压缩视频
    • EP2522142A2
    • 2012-11-14
    • EP11704450.3
    • 2011-02-18
    • Skype
    • BIVOLARSKY, LazarNILSSON, MattiasVAFIN, RenatANDERSEN, Soren Vang
    • H04N7/26H04N7/50H04N7/46G06T3/40
    • H04N19/115H04N19/105H04N19/107H04N19/119H04N19/146H04N19/176H04N19/46H04N19/48H04N19/59H04N19/61
    • A method of transmitting video data from a transmitter to a receiver, the method comprising: receiving data values of a video signal at a higher resolution; at the transmitter, combining groups of the data values into one or more first units of a first lower-resolution arrangement; encoding and transmitting the first lower-resolution arrangement to the receiver; at the transmitter, combining groups of the data values into one or more second units of a second lower-resolution arrangement, wherein the second units are offset from the first units by a fractional shift such that each second unit partially overlaps with at least one first unit; encoding and transmitting the second lower-resolution arrangement to the receiver; and transmitting an indication of said shift to the receiver; and at the receiver, combining the first and second lower-resolution arrangements based on the indication so as to reconstruct an image of at least a higher resolution than that of the first and second lower- resolution arrangements.
    • 一种从发射机向接收机传输视频数据的方法,该方法包括:以较高分辨率接收视频信号的数据值; 在发射机处,将数据值组组合成第一较低分辨率布置的一个或多个第一单元; 将所述第一较低分辨率布置编码并发送到所述接收器; 在发射机处,将数据值组组合成第二较低分辨率布置的一个或多个第二单元,其中第二单元从第一单元偏移分数移位,使得每个第二单元部分地与至少一个第一单元 单元; 将所述第二较低分辨率布置编码并发送到所述接收器; 以及向所述接收器发送所述转变的指示; 并且在接收器处,基于该指示组合第一和第二较低分辨率布置,以便重构至少比第一和第二较低分辨率布置的分辨率更高的分辨率的图像。
    • 10. 发明公开
    • MODE DECISION WITH PERCEPTUAL - BASED INTRA SWITCHING
    • MODUSENTSCHEIDUNG MIT WAHRNEHMUNGSBASIERTER INTRASCHALTUNG
    • EP2712481A1
    • 2014-04-02
    • EP12729138.3
    • 2012-06-22
    • Skype
    • NILSSON, MattiasVAFIN, RenatANDERSEN, Soren Vang
    • H04N7/26H04N7/50H04N7/64
    • A video coding method includes for each target image portion to be encoded, selecting a preferred one of a set of encoding modes by optimizing a function comprising an estimate of distortion and a measure of bit rate required to encode the target image portion, the encoding modes comprising at least an intra frame mode and an inter frame mode; and transmitting the encoded video stream over a lossy channel. The estimate of distortion is based on a contribution from possible new loss over the channel comprising possible loss of the target block, and on a contribution from possible past loss over the channel comprising possible loss in a history of the encoded video stream upon which decoding of the target portion depends. The method includes accumulating the contribution from past loss over time, such that the estimate of distortion grows irrespective of the contribution from new loss.
    • 视频编码方法包括:对于要编码的每个目标图像部分,通过优化包括失真估计和编码目标图像部分所需的比特率的度量的函数来选择一组编码模式中的优选模式,编码模式 至少包括帧内模式和帧间模式; 以及通过有损的信道发送编码的视频流。 失真的估计是基于包括目标块的可能丢失的信道上可能的新损失的贡献,以及可能的过去在信道上的损失的贡献,包括编码视频流的历史中的可能损失, 目标部分依赖。 该方法包括随着时间的推移累积过去损失的贡献,使得失真的估计值与新损失的贡献无关。