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    • 4. 发明申请
    • SELECTION OF WATERMARKS FOR THE WATERMARKING OF COMPRESSED VIDEO
    • 选择水印的压缩视频
    • US20110158465A1
    • 2011-06-30
    • US12737829
    • 2009-08-18
    • Dekun ZouJeffrey Adam BloomShan He
    • Dekun ZouJeffrey Adam BloomShan He
    • H04N7/26G06K9/00
    • H04N19/00763G06T1/0028G06T2201/0051G06T2201/0053G06T2201/0061G06T2201/0202H04N19/154H04N19/467H04N19/593
    • A method comprises accessing changes which can be watermarks in a list for coded data, the changes having an syntax element, an original value and an candidate alternative value; determining for a subset a group of compliant changes from the changes, the complaint changes being compliant with a coding protocol such as a CABAC encoding protocol; and selecting for the subset only compliant changes that result in the subset having only one candidate alternative value for each syntax elements and result in only compliant changes also meeting at least one performance criterion. The method can include determining fidelity, recoverability, or robustness of the watermarks and removing or preventing watermarks from being in the subset based on the fidelity, recoverability, or robustness, wherein fidelity, recoverability, and robustness are performance criteria. The method can include determining at least two performance values for the watermarks, determining some collective metric of the at least two performance values, and removing or preventing watermarks from being in the subset based on the same collective metric.
    • 一种方法包括访问可以是用于编码数据的列表中的水印的改变,所述改变具有语法元素,原始值和候选替代值; 根据变化确定子集一组合规变更,投诉变化符合诸如CABAC编码协议之类的编码协议; 以及仅为所述子集选择合规变更,所述变化导致所述子集对于每个语法元素仅具有一个候选替代值,并且仅导致符合变化也符合至少一个性能标准。 该方法可以包括确定水印的保真度,可恢复性或鲁棒性,并且基于保真度,可恢复性或鲁棒性去除或防止水印在子集中,其中保真度,可恢复性和鲁棒性是性能标准。 该方法可以包括确定水印的至少两个性能值,确定至少两个性能值的一些集合度量,以及基于相同的集合度量去除或防止水印在该子集中。
    • 5. 发明申请
    • MODIFYING A CODED BITSTREAM
    • 修改编码的BITSTREAM
    • US20100027684A1
    • 2010-02-04
    • US12450200
    • 2007-11-02
    • Dekun ZouJeffrey Adam BloomPeng YinOscar Divorra Escoda
    • Dekun ZouJeffrey Adam BloomPeng YinOscar Divorra Escoda
    • H04B1/66G06K9/00
    • G06T1/0035G06T2201/0053H04N19/13H04N19/467H04N19/48H04N19/70
    • Implementations may relate to various aspects of modifying, or using, a coded bitstream, or to recovering water-marking information from data. In one implementation, a coded bitstream is modified to allow for the application of a watermark to the coded bitstream without changing the coding of any other syntax elements in the bitstream. This is performed by identifying conditions necessary to change a coded syntax element without disrupting the interpretation of subsequent coded elements. The coded syntax element is replaced with another coded value if the modified value generates the same decoding variables as the original value would have generated. Particular implementations focus on syntax elements coded using entropy coding, including, for example, Context-based Adaptive Binary Arithmetic Coding (CABAC). Regardless of the type of coding or watermarking, various implementations may provide for recovering watermarking information. Particular implementations recover watermarking information using detection data and feature information.
    • 实现可以涉及修改或使用编码比特流或从数据中恢复水印信息的各个方面。 在一个实现中,编码比特流被修改为允许将水印应用于编码比特流,而不改变比特流中任何其他语法元素的编码。 这是通过识别改变编码语法元素所必需的条件而不中断后续编码元素的解释来执行的。 如果修改后的值产生与原始值相同的解码变量,则将编码语法元素替换为其他编码值。 特定实现集中于使用熵编码编码的语法元素,包括例如基于上下文的自适应二进制算术编码(CABAC)。 不管编码或水印的类型如何,各种实现可以提供恢复水印信息。 具体实现使用检测数据和特征信息来恢复水印信息。
    • 8. 发明授权
    • Video quality monitoring
    • 视频质量监控
    • US08885050B2
    • 2014-11-11
    • US13025558
    • 2011-02-11
    • Beibei WangDekun ZouRan DingTao LiuSitaram BhagavathyNiranjan NarvekarJeffrey A. BloomGlenn L. Cash
    • Beibei WangDekun ZouRan DingTao LiuSitaram BhagavathyNiranjan NarvekarJeffrey A. BloomGlenn L. Cash
    • H04N17/00
    • H04N17/004
    • Systems and methods of perceptual quality monitoring of video information, communications, and entertainment that can estimate the perceptual quality of video with high accuracy, and can be used to produce quality scores that better correlate with subjective quality scores of an end user. The systems and methods of perceptual quality monitoring of video can generate, from an encoded input video bitstream, estimates of one or more quality parameters relating to the video, such as the coding bit rate parameter, the video frame rate parameter, and the packet loss rate parameter, and provide these video quality parameter estimates to a predetermined video quality estimation model. Because the estimates of the video quality parameters are generated from the encoded input video bitstream as it is being received, the systems and methods are suitable for use as QoE monitoring tools.
    • 视频信息,通信和娱乐的感知质量监控的系统和方法可以高精度地估计视频的感知质量,并且可以用于产生与最终用户的主观质量得分更好相关的质量分数。 视频的感知质量监视的系统和方法可以从编码的输入视频比特流中产生与视频相关的一个或多个质量参数的估计,例如编码比特率参数,视频帧速率参数和分组丢失 速率参数,并将这些视频质量参数估计提供给预定的视频质量估计模型。 因为视频质量参数的估计在编码的输入视频比特流被接收时产生,所以系统和方法适合用作QoE监视工具。
    • 9. 发明申请
    • AUDIO VIDEO OFFSET DETECTOR
    • 音频视频偏移检测器
    • US20140192263A1
    • 2014-07-10
    • US14209036
    • 2014-03-13
    • Jeffrey A. BloomDekun ZouRan Ding
    • Jeffrey A. BloomDekun ZouRan Ding
    • H04N5/04
    • H04N5/04H04N21/233H04N21/23418H04N21/4307H04N21/4394H04N21/44008
    • Systems and methods of measuring a temporal offset between audio content and video content that employ audio fingerprints from an audio signal in the audio content, and video fingerprints from video frames in the video content. The systems obtain reference audio and video fingerprints prior to transmission of video over a media channel, and obtain target audio and video fingerprints subsequent to transmission of the video over the media channel. Each fingerprint has an associated time stamp. Using the reference and target audio fingerprints and their associated time stamps, the systems determine an audio time stamp offset. Using the reference and target video fingerprints and their associated time stamps, the systems determine a video time stamp offset. Using the audio and video time stamp offsets, the systems determine a temporal offset between the video content and the audio content introduced by the media channel.
    • 测量在音频内容中使用音频指纹的音频内容和视频内容之间的时间偏移的系统和方法,以及来自视频内容中视频帧的视频指纹。 在通过媒体信道传输视频之前,系统获得参考音频和视频指纹,并且在通过媒体信道传输视频之后获得目标音频和视频指纹。 每个指纹都有相关的时间戳。 使用参考和目标音频指纹及其相关的时间戳,系统确定音频时间戳偏移量。 使用参考和目标视频指纹及其相关的时间戳,系统确定视频时间戳偏移量。 使用音频和视频时间戳偏移,系统确定视频内容和由媒体频道引入的音频内容之间的时间偏移。