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    Methods and devices for coding binary symbols as n-tuples
    42.
    发明公开
    Methods and devices for coding binary symbols as n-tuples 审中-公开
    的方法和装置，用于编码二进制符号作为一个n元组

    公开(公告)号：EP2675160A3

    公开(公告)日：2015-10-28

    申请号：EP12172474.4

    申请日：2012-06-18

    申请人： BlackBerry Limited

    发明人： Nguyen, Nguyen ,  He, Dake

    IPC分类号： H04N7/26

    CPC分类号： H04N19/44 ,  H04N19/124 ,  H04N19/18 ,  H04N19/46

    摘要： Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit. Greater-than-one flags are encoded by grouping them into tuples and by encoding a tuple-based value that is a function of the greater-than-one flags within that tuple. The tuple-based value may permit the decoder to infer the greater-than-one flags in some cases, in which case they are not encoded in the bitstream.

    Multi-level significance map scanning
    43.
    发明授权
    Multi-level significance map scanning 有权
    Scannen von mehrstufigen Signifikanzkarten

    公开(公告)号：EP2595380B1

    公开(公告)日：2015-10-21

    申请号：EP12164134.4

    申请日：2012-04-13

    申请人： BlackBerry Limited

    发明人： He, Dake ,  Nguyen, Nguyen ,  Ji, Tianying

    IPC分类号： H04N19/70 ,  H04N19/46 ,  H04N19/13 ,  H04N19/63 ,  H04N19/129 ,  H04N19/61 ,  H04N19/136 ,  H04N19/18 ,  H04N19/40

    CPC分类号： H04N19/40 ,  H04N19/129 ,  H04N19/13 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/61 ,  H04N19/63 ,  H04N19/70 ,  H04N19/91

    摘要： Methods of encoding and decoding for video data are described in which multi-level significance maps are used in the encoding and decoding processes. The significant-coefficient flags that form the significance map are grouped into contiguous groups, and a significant-coefficient-group flag signifies for each group whether that group contains no non-zero significant-coefficient flags. A multi-level scan order may be used in which significant-coefficient flags are scanned group-by-group. The group scan order specifies the order in which the groups are processed, and the scan order specifies the order in which individual significant-coefficient flags within the group are processed. The bitstream may interleave the significant-coefficient-group flags and their corresponding significant-coefficient flags, if any.

    摘要翻译： 描述用于视频数据的编码和解码的方法，其中在编码和解码过程中使用多级重要性图。 形成有效图的有效系数标记被分组成连续的组，并且对于每个组，有意义的系数组标志表示该组是否包含非零有效系数标志。 可以使用多级扫描顺序，其中显着系数标志逐组扫描。 组扫描顺序指定处理组的顺序，扫描顺序指定处理组内各个有效系数标志的顺序。 比特流可以交织有效系数组标志及其对应的有效系数标志（如果有的话）。

    Resilient signal encoding
    44.
    发明公开
    Resilient signal encoding 审中-公开
    Robuste Signalcodierung

    公开(公告)号：EP2785062A1

    公开(公告)日：2014-10-01

    申请号：EP13160824.2

    申请日：2013-03-25

    申请人： BlackBerry Limited ,  2236008 Ontario Inc.

    发明人： Montminy, Christian Joseph ,  Martin-Cocher, Gaelle Christine ,  He, Dake

    IPC分类号： H04N19/00

    CPC分类号： H04N19/89 ,  H04N19/105 ,  H04N19/107 ,  H04N19/164 ,  H04N19/46 ,  H04N19/61 ,  H04N21/6377 ,  H04N21/6379 ,  H04N21/6583

    摘要： A system and method for resilient signal encoding provide for encoding a data signal to reduce bandwidth required to transmit the encoded signal while mitigating the impact of frames lost or corrupted during transmission. A first frame of the data signal is encoded as an independently decodable frame and is assigned as a reference frame. Subsequent frames of the data signal are encoded as different frames relative to the reference frame. The independently decodable frame and the difference frames are transmitted to a receiver. The receiver decodes the frames and sends an acknowledgement for one or more successfully decoded difference frames. When an acknowledgment is received, a corresponding data signal frame is assigned as the reference frame. Subsequent difference frames are encoded relative to the newly assigned reference frame.

    摘要翻译： 用于弹性信号编码的系统和方法提供对数据信号的编码，以减少发送编码信号所需的带宽，同时减轻传输期间丢失或损坏的帧的影响。 数据信号的第一帧被编码为可独立解码的帧，并被分配为参考帧。 数据信号的后续帧被编码为相对于参考帧的不同帧。 可独立解码的帧和差分帧被发送到接收机。 接收机解码帧并发送一个或多个成功解码的差分帧的确认。 当接收到确认时，分配对应的数据信号帧作为参考帧。 随后的差分帧相对于新分配的参考帧被编码。

    Multi-bit information hiding using overlapping subsets
    47.
    发明公开
    Multi-bit information hiding using overlapping subsets 有权
    Verbergen von Multibit-Information mithilfeüberlappenderUntermengen

    公开(公告)号：EP2675159A1

    公开(公告)日：2013-12-18

    申请号：EP12172293.8

    申请日：2012-06-15

    申请人： BlackBerry Limited

    发明人： He, Dake ,  Wang, Jing ,  Yu, Xiang

    IPC分类号： H04N7/26

    CPC分类号： H04N19/467 ,  H04N19/18 ,  H04N19/48 ,  H04N19/61

    摘要： Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit. Sign bits are hidden in the parity of partially overlapping subsets of a set of coefficients. This enables the hiding of multiple sign bits per coefficient group. In the case that two subsets result in an incorrect parity calculation, the parity of only one coefficient value needs to be adjusted at the encoder in order to correct the reconstruction of both sign bits. Other information bits may be hidden instead of sign bits in some cases.

    摘要翻译： 用于从变换单元中的系数组的编码视频数据的比特流重建系数级的方法和装置。 符号位隐藏在一组系数的部分重叠子集的奇偶校验中。 这使得能够隐藏每个系数组的多个符号位。 在两个子集导致错误的奇偶校验计算的情况下，需要在编码器处调整仅一个系数值的奇偶校验，以便校正两个符号位的重建。 在某些情况下，其他信息位可能被隐藏而不是符号位。