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    Method and apparatus for entropy coding in image compression
    52.
    发明授权
    Method and apparatus for entropy coding in image compression 有权

    公开(公告)号：US10142629B2

    公开(公告)日：2018-11-27

    申请号：US15386022

    申请日：2016-12-21

    Applicant: MEDIATEK INC.

    Inventor： Tung-Hsing Wu ,  Li-Heng Chen ,  Han-Liang Chou

    IPC: H04N19/112 ,  H04N7/12 ,  H04N19/184 ,  H04N19/13 ,  H04N19/44 ,  H04N19/136

    Abstract: A method and apparatus of image coding including adaptive entropy coding are disclosed. According to this method, input pixels associated with a group of symbols generated from image or video data are received. Maximum bit-depth of the group of symbols is then determined. If the maximum bit-depth of the group of symbols is smaller than a first bit-depth threshold, the group of symbols is encoded or decoded using Golomb-Rice coding. If the maximum bit-depth of the group of symbols is greater than or equal to the first bit-depth threshold, the group of symbols is encoded or decoded using second entropy coding, where the second entropy coding is different from the Golomb-Rice coding. Outputs corresponding to encoded or decoded output associated with the group of symbols are provided. The maximum bit-depth of the group of symbols is signaled at the encoder or recovered at the decoder by parsing the bitstream.

    Method and Apparatus for Sign Data Hiding of Video and Image Data
    57.
    发明申请
    Method and Apparatus for Sign Data Hiding of Video and Image Data 审中-公开
    用于签名数据隐藏视频和图像数据的方法和装置

    公开(公告)号：US20170034524A1

    公开(公告)日：2017-02-02

    申请号：US15292149

    申请日：2016-10-13

    Applicant: MEDIATEK INC.

    Inventor： Kun-Bin Lee ,  Ting-An Lin ,  Tung-Hsing Wu

    IPC: H04N19/48 ,  H04N19/60 ,  H04N19/124

    CPC classification number: H04N19/48 ,  H04N19/124 ,  H04N19/436 ,  H04N19/467 ,  H04N19/60 ,  H04N19/70

    Abstract: A method and apparatus for processing transform coefficients for a video coder or encoder is disclosed in the present invention. Embodiments according to the present invention reduce the storage requirement for sign bit hiding (SBH), improve the parallelism of SBH processing or simplify parity checking. Partial quantized transform coefficients (QTCs) of a transform block may be processed before all QTCs of the transform block are received. Zero and non-zero QTCs of a scan block may be processed concurrently and the QTCs of multiple scan blocks in a transform block may also be processed concurrently when computing cost function for SBH compensation. The range for searching for a value-modification QTC may be less than the scan block to be processed. Parity checking on QTCs may be based on least significant bits (LSBs) of all QTCs or all non-zero QTCs of a scan block.

    Abstract translation: 在本发明中公开了一种用于处理视频编码器或编码器的变换系数的方法和装置。 根据本发明的实施例减少了符号位隐藏（SBH）的存储要求，提高了SBH处理的并行性或简化了奇偶校验。 可以在接收到变换块的所有QTC之前处理变换块的部分量化变换系数（QTC）。 可以同时处理扫描块的零和非零QTC，并且当计算SBH补偿的成本函数时，变换块中的多个扫描块的QTC也可以同时处理。 用于搜索值修改QTC的范围可能小于要处理的扫描块。 QTC的奇偶校验可以基于所有QTC的最低有效位（LSB）或扫描块的所有非零QTC。

    INTER PREDICTION METHOD WITH CONSTRAINED REFERENCE FRAME ACQUISITION AND ASSOCIATED INTER PREDICTION DEVICE
    58.
    发明申请
    INTER PREDICTION METHOD WITH CONSTRAINED REFERENCE FRAME ACQUISITION AND ASSOCIATED INTER PREDICTION DEVICE 审中-公开
    具有约束参考帧采集的INTER预测方法和相关的帧间预测装置

    公开(公告)号：US20160373763A1

    公开(公告)日：2016-12-22

    申请号：US15145807

    申请日：2016-05-04

    Applicant: MEDIATEK INC.

    Inventor： Tung-Hsing Wu ,  Han-Liang Chou

    IPC: H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/577

    CPC classification number: H04N19/105 ,  H04N19/172 ,  H04N19/31 ,  H04N19/33 ,  H04N19/426 ,  H04N19/46 ,  H04N19/50

    Abstract: An inter prediction method includes performing reference frame acquisition for inter prediction of a first frame in a first frame group to obtain at least one reference frame, and performing the inter prediction of the first frame according to the at least one reference frame. The at least one reference frame used by the inter prediction of the first frame is intentionally constrained to include at least one first reference frame obtained from reconstructed data of at least one second frame in the first frame group. The first frame group has at least one first frame, including the first frame, and the at least one second frame. Frames in the first frame group have a same image content but different resolutions.

    Abstract translation: 帧间预测方法包括对第一帧组中的第一帧进行帧间预测执行参考帧获取以获得至少一个参考帧，以及根据至少一个参考帧执行第一帧的帧间预测。 由第一帧的帧间预测使用的至少一个参考帧有意地被约束为包括从第一帧组中的至少一个第二帧的重建数据获得的至少一个第一参考帧。 第一帧组具有至少一个第一帧，包括第一帧和至少一个第二帧。 第一帧组中的帧具有相同的图像内容，但分辨率不同。

    METHOD AND APPARATUS FOR PERFORMING BLOCK PREDICTION SEARCH BASED ON RESTORED SAMPLE VALUES DERIVED FROM STORED SAMPLE VALUES IN DATA BUFFER
    59.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING BLOCK PREDICTION SEARCH BASED ON RESTORED SAMPLE VALUES DERIVED FROM STORED SAMPLE VALUES IN DATA BUFFER 审中-公开
    基于从数据缓冲区中存储的样本值导出的恢复样本值来执行块预测搜索的方法和装置

    公开(公告)号：US20150139311A1

    公开(公告)日：2015-05-21

    申请号：US14534184

    申请日：2014-11-06

    Applicant: MEDIATEK INC.

    Inventor： Tung-Hsing Wu ,  Kun-Bin Lee

    IPC: H04N19/14 ,  H04N19/176 ,  H04N19/50 ,  H04N19/159

    CPC classification number: H04N19/14 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/423 ,  H04N19/50 ,  H04N19/593

    Abstract: A block prediction search method includes at least following steps: utilizing a data buffer to store bit-depth reduced sample values of a plurality of samples in a first pixel line; detecting occurrence of an edge in the first pixel line according to restored sample values derived from stored sample values in the data buffer; and determining a block prediction vector for a pixel group in a second pixel line different from the first pixel line, wherein the block prediction vector is determined based at least partly on a last edge count value indicative of a number of samples in the first pixel line that have gone by since the edge occurs.

    Abstract translation: 块预测搜索方法至少包括以下步骤：利用数据缓冲器将多个样本的比特深度降低的采样值存储在第一像素线中; 根据从数据缓冲器中存储的样本值导出的恢复的样本值来检测第一像素行中的边缘的出现; 以及确定与所述第一像素行不同的第二像素行中的像素组的块预测矢量，其中，所述块预测矢量至少部分地基于指示所述第一像素行中的采样数的最后边缘计数值来确定 自从边缘发生以来已经过去了。

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