Method and apparatus of intra mode coding

    公开(公告)号:US10070126B2

    公开(公告)日:2018-09-04

    申请号:US14123201

    申请日:2012-04-18

    摘要: Method and apparatus for intra prediction mode coding and decoding are disclosed. In one embodiment, the encoding and decoding process assigns individual indices and codewords to DC mode and Planar mode respectively. The flag is set if the current intra prediction mode is equal to any of one or more neighboring intra prediction modes. Variable length codes are designed for a remaining mode set. If the flag is not set, the currently intra prediction mode is encoded using the variable length codes. In another embodiment, multiple most probable modes are used. If the current intra prediction mode is not equal to any of the multiple most probable modes, the current intra prediction mode is encoded using variable length codes designed for the corresponding remaining modes according the ranking order of the remaining modes.

    Method and Apparatus of Improved Intra Prediction Mode Coding
    4.
    发明申请
    Method and Apparatus of Improved Intra Prediction Mode Coding 有权
    改进的预测模式编码方法与装置

    公开(公告)号:US20120177112A1

    公开(公告)日:2012-07-12

    申请号:US13171858

    申请日:2011-06-29

    IPC分类号: H04N7/26

    摘要: A method and apparatus for improved intra chroma prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra coding modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. Furthermore, a Luma_mode has also been used in intra prediction of chroma component to further improve the performance in the High Efficiency Video Coding (HEVC) standard being developed. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. Spatial features in a picture often exist in both luma and chroma components. The intra luma prediction mode and intra chroma prediction mode will have high probability to be the same. Accordingly, an embodiment according to the present invention adaptively assigns variable length codes to a set of mode symbols associated with intra chroma prediction by assigning a shortest code to the Luma_mode. Luma_mode not only can be the best luma mode of the corresponding luma block but also can be selected from several corresponding luma modes. The maximum length of chroma prediction codes is decreased by one bit when Luma_mode is equal to one of frequent modes. The coding efficiency of arithmetic coding of chroma prediction codes is further improved by selecting the context upon neighboring blocks.

    摘要翻译: 公开了一种用于改进的帧内色度预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 实际上,将图像划分成块,并且以块为基础执行帧内模式预测。 在较新的编码系统中,已经使用诸如垂直模式,水平模式,直流模式和对角线模式的多个帧内编码模式来提高帧内编码的编码效率。 此外,Luma_mode也被用于色度分量的帧内预测,​​以进一步提高正在开发的高效率视频编码(HEVC)标准中的性能。 然而,用于帧内预测的模式选择信息必须被传送到解码器以进行正确的操作。 图片中的空间特征通常存在于亮度和色度分量中。 内部亮度预测模式和内部色度预测模式将具有相同的概率。 因此,根据本发明的实施例通过向Luma_mode分配最短代码来自适应地将可变长度代码分配给与帧内色度预测相关联的一组模式符号。 Luma_mode不仅可以是对应亮度块的最佳亮度模式,还可以从几个相应的亮度模式中选择。 当Luma_mode等于频繁模式之一时,色度预测码的最大长度减少一位。 通过选择相邻块的上下文,进一步提高色度预测码的算术编码的编码效率。

    Request bits estimation for a Wyner-Ziv codec
    6.
    发明授权
    Request bits estimation for a Wyner-Ziv codec 有权
    为Wyner-Ziv编解码器请求比特估计

    公开(公告)号:US07388521B2

    公开(公告)日:2008-06-17

    申请号:US11537947

    申请日:2006-10-02

    IPC分类号: H03M7/34

    CPC分类号: H03M7/30 H04N19/395

    摘要: Request bits estimation for a Wyner-Ziv codec is described. In one aspect, and prior to communicating Wyner-Ziv parity bits to a Wyner-Ziv decoder, an estimated total number of parity bits to send to the Wyner-Ziv decoder are determined. This estimated number of parity bits allows the Wyner-Ziv decoder to reconstruct a frame of different coded content using the Wyner-Ziv parity bits such that the reconstructed frame will meet particular quality criteria. This estimated number of parity bits is determined independent of a request-bits feedback loop between the Wyner-Ziv coder and the Wyner-Ziv decoder. The estimated number of parity bits is communicated to the Wyner-Ziv decoder for reconstruction and presentation of the frame to a user.

    摘要翻译: 描述了Wyner-Ziv编解码器的请求比特估计。 在一个方面中,并且在将Wyner-Ziv奇偶校验位传送到Wyner-Ziv解码器之前,确定发送到Wyner-Ziv解码器的估计的奇偶校验位数。 该估计的奇偶校验位数允许Wyner-Ziv解码器使用Wyner-Ziv奇偶校验位来重建不同编码内容的帧,使得重建的帧将满足特定的质量标准。 独立于Wyner-Ziv编码器和Wyner-Ziv解码器之间的请求位反馈环路来确定该估计的奇偶校验位数。 将估计的奇偶校验位数传送给Wyner-Ziv解码器,以重构并向用户呈现帧。

    Method and apparatus of improved intra luma prediction mode coding
    8.
    发明授权
    Method and apparatus of improved intra luma prediction mode coding 有权
    改进的内部亮度预测模式编码的方法和装置

    公开(公告)号:US09596483B2

    公开(公告)日:2017-03-14

    申请号:US13198697

    申请日:2011-08-04

    摘要: A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. The present invention provides multiple intra prediction mode candidates based on neighboring intra prediction modes so that there is a better chance for predictor hit. Accordingly, improved coding efficiency is achieved.

    摘要翻译: 公开了一种用于改进帧内预测模式编码的方法和装置。 帧内预测利用图片内或图片区域内的空间相关性。 在高效率视频编码(HEVC)中,考虑了用于帧内预测模式的编码方案,其中将当前块的帧内预测模式与对应于两个相邻块的两个内部亮度预测模式的最小值进行比较。 如果当前块的帧内预测模式与两个相邻帧内亮度预测模式的最小值相同,则发送单个位以指示该情况。 否则,以固定长度的码字发送当前帧内预测模式的信息。 本发明提供了基于相邻帧内预测模式的多个帧内预测模式候选,使得预测器命中的机会更好。 因此,实现了改进的编码效率。

    Wyner-Ziv coding with multiple side information
    9.
    发明授权
    Wyner-Ziv coding with multiple side information 有权
    Wyner-Ziv编码与多方信息

    公开(公告)号:US08340192B2

    公开(公告)日:2012-12-25

    申请号:US12047317

    申请日:2008-03-12

    IPC分类号: H04N11/04

    摘要: A Wyner-Ziv coding scheme jointly utilizes multiple side information at the decoder is described. A new probability model is introduced based on an extended turbo decoding trellis, so that the transitional probability is calculated from the probabilities conditioned on multiple side information. The proposed scheme handles multiple side information in a multi-dimensional manner to potentially achieve coding performance better than either selecting one side information or generating a single side information by averaging several side information. When the decoder receives multiple streams of parity bits, the conditional probabilities on the parity bits from the multiple streams all contribute in turbo decoding. The errors existing in some of the streams can be automatically eliminated during the decoding process.

    摘要翻译: 描述了在解码器处共同利用多边信息的Wyner-Ziv编码方案。 基于扩展turbo解码网格引入新的概率模型,从而根据多边信息的概率计算过渡概率。 所提出的方案以多维方式处理多个侧面信息,以便比选择一个侧面信息或通过平均多个边缘信息来生成单个侧面信息来潜在地实现编码性能。 当解码器接收到多个奇偶校验位流时,来自多个流的奇偶校验位的条件概率在turbo解码中都有贡献。 在解码过程中可以自动消除一些流中存在的错误。

    METHOD TO INCREASE CROP GRAIN YIELD UTILIZING COMPLEMENTARY PAIRED GROWTH AND YIELD GENES
    10.
    发明申请
    METHOD TO INCREASE CROP GRAIN YIELD UTILIZING COMPLEMENTARY PAIRED GROWTH AND YIELD GENES 审中-公开
    使用补充成对生长和产量基因增加作物籽粒产量的方法

    公开(公告)号:US20120272353A1

    公开(公告)日:2012-10-25

    申请号:US13531876

    申请日:2012-06-25

    摘要: The present invention provides methods to increase crop yield utilizing transgenic complementary paired genes controlling plant growth and yield. The specific genes increase female reproductive organs and are paired with genes responsible for modifying the growth of non-yield specific plant tissues. Plants, plant progeny, seeds and tissues created by these methods are also described. Polynucleotides encoding the paired sequences are provided for expression in a plant of interest. Expression cassettes, plants, plant cells, plant parts and seeds comprising the sequences of the invention are further provided. In specific embodiments, the polynucleotide is operably linked to a constitutive promoter.

    摘要翻译: 本发明提供了利用控制植物生长和产量的转基因互补配对基因来提高作物产量的方法。 特定基因增加雌性生殖器官,并与负责改变非产量特异性植物组织生长的基因配对。 还描述了通过这些方法产生的植物,植物后代,种子和组织。 提供编码配对序列的多核苷酸用于在感兴趣的植物中表达。 还提供了包含本发明序列的表达盒,植物,植物细胞,植物部分和种子。 在具体实施方案中,多核苷酸可操作地连接于组成型启动子。