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    • 6. 发明申请
    • Adaptive Coding and Decoding
    • 自适应编码和解码
    • US20090129464A1
    • 2009-05-21
    • US12087577
    • 2007-01-12
    • Joel JungGuillaume LarocheMarc Ballavoine
    • Joel JungGuillaume LarocheMarc Ballavoine
    • H04N7/32H04N11/02
    • H04N19/517H04N19/196H04N19/463H04N19/52
    • The invention relates to a method of transmitting an image portion, which method comprises, in a coding phase analyzing a coding context, adapting a parameter of a group of prediction functions that can be used for coding, forming a first predicted descriptor using a selected prediction function, and determining and transmitting a residue between the first predicted descriptor and the current descriptor. The method further includes a decoding phase comprising analyzing a decoding context, adapting a parameter of a group of prediction functions that can be used for decoding, forming a second predicted descriptor using a selected prediction function and combining the second predicted descriptor and the received residue to deliver a decoded version of the current descriptor.
    • 本发明涉及一种发送图像部分的方法,该方法包括:在分析编码上下文的编码阶段中,对可用于编码的一组预测函数的参数进行调整,使用所选择的预测形成第一预测描述符 功能,以及确定和发送第一预测描述符和当前描述符之间的残差。 该方法还包括解码阶段,包括分析解码上下文,调整可用于解码的一组预测函数的参数,使用所选择的预测函数形成第二预测描述符,并将第二预测描述符和接收到的残差组合 提供当前描述符的解码版本。
    • 9. 发明授权
    • Method of measuring digital video quality
    • 测量数字视频质量的方法
    • US06822675B2
    • 2004-11-23
    • US10014242
    • 2001-12-11
    • Joel JungJorge E. Caviedes
    • Joel JungJorge E. Caviedes
    • H04N521
    • H04N17/004H04N19/527H04N19/85H04N19/86
    • The present invention relates to a method of measuring video quality. Said method comprises a step of determining (21) at least one reference level (JND) above which visual artifacts become noticeable to a group of subjects, with a corresponding predetermined artifact metric (M), from a set of reference sequences (RS) of digital pictures only comprising a corresponding artifact. The method of measuring video quality also comprises a step of measuring (22) at least one artifact level (L) of the input sequence (IS) with the corresponding predetermined artifact metric (M). It further comprises a step of computing (23) a video quality metric (OQM) of the input sequence from at least one ratio of the artifact level (L) to the reference level (JND) corresponding to a same predetermined artifact metric. Such a method of measuring video quality provides an objective quality metric.
    • 本发明涉及一种测量视频质量的方法。 所述方法包括以下步骤:确定(21)至少一个参考水平(JND),在所述至少一个参考水平(JND)之上,从一组参考序列(RS) 数字图片只包含相应的神器。 测量视频质量的方法还包括用相应的预定伪像度量(M)测量(22)至少一个输入序列(IS)的伪像级(L)的步骤。 它还包括从对应于相同的预定伪像度量的伪像级别(L)到参考级别(JND)的至少一个比率来计算(23)输入序列的视频质量度量(OQM)的步骤。 这种测量视频质量的方法提供了客观的质量度量。
    • 10. 发明申请
    • Video encoding method and device
    • 视频编码方法和设备
    • US20090097555A1
    • 2009-04-16
    • US11794808
    • 2005-12-15
    • Marc BaillavoineJoel JungJean-Christophe Amiel
    • Marc BaillavoineJoel JungJean-Christophe Amiel
    • H04N7/32
    • H04N19/67H04N19/46H04N19/895
    • Successive images (F) of a video sequence are encoded in order in generate parameters which are included in an output flow (F) that is to be transmitted to a decoder. The encoding of certain images is effected in Inter mode relative to one or several previous images of the sequence. The output flow also includes long term marking commands for certain images and demarking commands for previously marked images. Each long-term marked image is kept in a memory by the decoder until a corresponding demarking command is received. Return information on the restoration of the images of the video sequence by the decoder is received by the encoder (1) and analyzed in order to identify an image that has been lost by the decoder. It is possible to encode a following image of the sequence in Inter mode in relation to a long-term marked image in response to identification of an image lost to the decoder.
    • 视频序列的连续图像(F)按照要被发送到解码器的输出流(F)中包含的生成参数的顺序进行编码。 某些图像的编码在相对于序列的一个或多个先前图像的Inter模式下实现。 输出流还包括用于特定图像的长期标记命令和用于先前标记的图像的标记命令。 每个长期标记的图像由解码器保存在存储器中,直到接收到相应的标记命令。 由解码器恢复视频序列的图像的返回信息由编码器(1)接收并进行分析,以识别由解码器丢失的图像。 响应于对解码器丢失的图像的识别,可以相对于长期标记的图像在Inter模式中对序列的后续图像进行编码。