Method of encoding flags in layer using inter-layer correlation, method and apparatus for decoding coded flags
    41.
    发明申请
    Method of encoding flags in layer using inter-layer correlation, method and apparatus for decoding coded flags 审中-公开
    使用层间相关编码层中标记的方法,用于解码编码标志的方法和装置

    公开(公告)号:US20070086516A1

    公开(公告)日:2007-04-19

    申请号:US11476103

    申请日:2006-06-28

    IPC分类号: H04B1/66 H04N7/12

    摘要: A method and apparatus for efficiently encoding diverse flags being used in a multilayer-based scalable video codec, based on an inter-layer correlation. The encoding method includes judging whether flags of a current layer included in a specified unit area are all equal to flags of a base layer, setting a specified prediction flag according to the result of judgment, and if it is judged that the flags of the current layer are equal to the flags of the base layer, skipping the flags of the current layer and inserting the flags of the base layer and the prediction flag into a bitstream.

    摘要翻译: 一种用于在基于层间相关性的基于多层的可伸缩视频编解码器中有效地编码各种标记的方法和装置。 编码方法包括:判断包含在指定单位区域中的当前层的标志是否全部等于基本层的标志,根据判断结果设定指定的预测标志,如果判断为当前的标志 层等于基本层的标志,跳过当前层的标志,并将基本层的标志和预测标记插入到比特流中。

    Method and apparatus for entropy encoding and entropy decoding fine-granularity scalability layer video data
    42.
    发明申请
    Method and apparatus for entropy encoding and entropy decoding fine-granularity scalability layer video data 审中-公开
    用于熵编码和熵解码细粒度可扩展层视频数据的方法和装置

    公开(公告)号:US20070071088A1

    公开(公告)日:2007-03-29

    申请号:US11525912

    申请日:2006-09-25

    IPC分类号: H04B1/66 H04N11/04

    摘要: Methods and apparatuses for entropy encoding and decoding Fine-granularity Scalability (FGS) layer video data are provided. The encoding method includes extracting residual data between a first block and a second block in a layer lower than the FGS layer corresponding to the first block; obtaining transform coefficients; dividing the transform coefficients in the first block into at least two subblocks; calculating the length of a prefix of first coefficients in the subblocks; and combining the prefix with a suffix used to distinguish the first coefficients; and VLC encoding the first coefficients. The encoding apparatus includes a subblock divider, a prefix generator, and a significant coefficient encoding unit. The decoding method includes calculating a range of a transform coefficient using a length of a prefix of the transform coefficient; extracting a value of the transform coefficient; VLC decoding the value; and combining first and second subblocks having the decoded coefficients.

    摘要翻译: 提供熵编码和解码的方法和装置细粒度可扩展性(FGS)层视频数据。 所述编码方法包括:在与所述第一块相对应的所述FGS层以下的层中提取第一块与第二块之间的残差数据; 获得变换系数; 将第一块中的变换系数划分为至少两个子块; 计算子块中第一系数的前缀的长度; 以及将前缀与用于区分第一系数的后缀组合; 和VLC编码第一系数。 编码装置包括子块分割器,前缀生成器和有效系数编码单元。 解码方法包括使用变换系数的前缀的长度来计算变换系数的范围; 提取变换系数的值; VLC解码值; 以及组合具有解码系数的第一和第二子块。

    Video coding method and apparatus using multi-layer based weighted prediction
    43.
    发明申请
    Video coding method and apparatus using multi-layer based weighted prediction 审中-公开
    使用多层加权预测的视频编码方法和装置

    公开(公告)号:US20060291562A1

    公开(公告)日:2006-12-28

    申请号:US11454908

    申请日:2006-06-19

    摘要: A method and apparatus for efficiently encoding a plurality of layers using inter-layer information in a multi-layer based video codec are disclosed. The video encoding method includes operations of reading the weighting factors of one layer; performing motion compensation on reference frames for the current frame based on a motion vector; generating a predicted frame for the current frame by acquiring a weighted sum of the motion-compensated reference frames using the read weighting factors; and encoding the difference between the current frame and the predicted frame.

    摘要翻译: 公开了一种使用多层视频编解码器中的层间信息对多层进行有效编码的方法和装置。 视频编码方法包括读取一层加权因子的操作; 基于运动矢量对当前帧的参考帧执行运动补偿; 通过使用读取的加权因子获取运动补偿参考帧的加权和来产生当前帧的预测帧; 并对当前帧和预测帧之间的差进行编码。

    Video coding method and apparatus for reducing mismatch between encoder and decoder
    44.
    发明申请
    Video coding method and apparatus for reducing mismatch between encoder and decoder 审中-公开
    用于减少编码器和解码器之间的不匹配的视频编码方法和装置

    公开(公告)号:US20060250520A1

    公开(公告)日:2006-11-09

    申请号:US11402842

    申请日:2006-04-13

    IPC分类号: H04N11/02

    摘要: A method of reducing a mismatch between an encoder and a decoder in motion compensated temporal filtering, and a video coding method and apparatus using the same. The video coding method includes dividing input frames into one final low-frequency frame and at least one high-frequency frame by performing motion compensated temporal filtering on the input frames; encoding the final low-frequency frame and decoding the encoded final low-frequency frame; re-estimating the at least one high-frequency frame using the decoded final low-frequency frame; and encoding the re-estimated high-frequency frame.

    摘要翻译: 一种在运动补偿时间滤波中减少编码器与解码器之间的失配的方法,以及使用该滤波器的视频编码方法和装置。 视频编码方法包括:通过对输入帧进行运动补偿时间滤波,将输入帧划分成一个最终低频帧和至少一个高频帧; 编码最终的低频帧并解码编码的最终低频帧; 使用解码的最终低频帧重新估计至少一个高频帧; 并对重新估计的高频帧进行编码。

    Multilayer video encoding/decoding method using residual re-estimation and apparatus using the same
    45.
    发明申请
    Multilayer video encoding/decoding method using residual re-estimation and apparatus using the same 审中-公开
    多层视频编码/解码方法采用残差再估计和装置使用相同

    公开(公告)号:US20060165304A1

    公开(公告)日:2006-07-27

    申请号:US11339496

    申请日:2006-01-26

    IPC分类号: G06K9/46

    摘要: A multilayer encoding/decoding method using residual re-estimation and an apparatus using the same are disclosed. The multilayer video encoding method includes (a) encoding a first residual image obtained by subtracting a predicted frame from an original frame, (b) decoding the encoded first residual image and generating a first restored frame by adding the decoded residual image to the predicted frame, (c) deblocking the first restored frame, and (d) encoding a second residual image obtained by subtracting the predicted frame from the first deblocked restored frame.

    摘要翻译: 公开了使用残余再估计的多层编码/解码方法和使用其的装置。 多层视频编码方法包括:(a)通过从原始帧中减去预测帧获得的第一残差图像进行编码,(b)对编码的第一残差图像进行解码,并通过将解码的残留图像与预测帧相加来生成第一恢复帧 (c)解锁第一恢复帧,(d)编码通过从第一解块恢复帧中减去预测帧而获得的第二残差图像。

    Video coding method and apparatus
    46.
    发明申请
    Video coding method and apparatus 审中-公开
    视频编码方法及装置

    公开(公告)号:US20060088222A1

    公开(公告)日:2006-04-27

    申请号:US11247147

    申请日:2005-10-12

    IPC分类号: G06K9/36

    摘要: A video coding method and apparatus are provided for improving compression efficiency or video/image quality by selecting a spatial transform method suitable for characteristics of an incoming video/image during video/image compression. The video coding apparatus includes a temporal transform module for removing temporal redundancy in an input frame to generate a residual frame, a wavelet transform module for performing wavelet transform on the residual frame to generate a wavelet coefficient, a Discrete Cosine Transform (DCT) module for performing DCT on the wavelet coefficient of each DCT block to create a DCT coefficient, and a quantization module for quantizing the DCT coefficient.

    摘要翻译: 提供一种用于通过在视频/图像压缩期间选择适合于输入视频/图像的特性的空间变换方法来提高压缩效率或视频/图像质量的视频编码方法和装置。 视频编码装置包括用于消除输入帧中的时间冗余以产生残余帧的时间变换模块,用于对残差帧执行小波变换以生成小波系数的小波变换模块,用于产生小波系数的离散余弦变换(DCT)模块 对每个DCT块的小波系数执行DCT以产生DCT系数,以及用于量化DCT系数的量化模块。

    Method and apparatus for effectively compressing motion vectors in video coder based on multi-layer
    47.
    发明申请
    Method and apparatus for effectively compressing motion vectors in video coder based on multi-layer 有权
    基于多层视频编码器有效压缩运动矢量的方法和装置

    公开(公告)号:US20060088101A1

    公开(公告)日:2006-04-27

    申请号:US11254051

    申请日:2005-10-20

    摘要: A method and apparatus of improving the compression efficiency of a motion vector by efficiently predicting a motion vector in an enhancement layer from a motion vector in a base layer in a video coding method using a multi-layer are provided. The method includes obtaining a motion vector in a base layer frame having a first frame rate from an input frame, obtaining a motion vector in a first enhancement layer frame having a second frame rate from the input frame, the second frame rate being greater than the first frame rate, generating a predicted motion vector by referring to a motion vector for at least one frame among base layer frames present immediately before and after the same temporal position as the first enhancement layer frame if there is no base layer frame at the same temporal position as the first enhancement layer frame, and coding a difference between the motion vector in the first enhancement layer frame and the generated predicted motion vector, and the obtained motion vector in the base layer.

    摘要翻译: 提供一种通过使用多层的视频编码方法从基层中的运动矢量有效地预测增强层中的运动矢量来提高运动矢量的压缩效率的方法和装置。 该方法包括从输入帧获得具有第一帧速率的基本层帧中的运动矢量,从输入帧获得具有第二帧速率的第一增强层帧中的运动矢量,第二帧速率大于 第一帧速率,如果在相同时刻没有基本层帧的情况下,通过参考紧邻在与第一增强层帧相同的时间位置之前和之后的基本层帧中的至少一个帧的运动矢量来生成预测的运动矢量 位置作为第一增强层帧,并且编码第一增强层帧中的运动矢量与生成的预测运动矢量之间的差,以及所获得的基本层中的运动矢量。

    Method and apparatus for supporting motion scalability
    48.
    发明申请
    Method and apparatus for supporting motion scalability 审中-公开
    支持运动可伸缩性的方法和装置

    公开(公告)号:US20050226335A1

    公开(公告)日:2005-10-13

    申请号:US11104640

    申请日:2005-04-13

    摘要: A method and apparatus for supporting scalability for motion vectors in scalable video coding are provided. The motion estimation apparatus includes a motion estimation module searching for a variable block size and a motion vector that minimize a cost function for each layer according to predetermined pixel accuracy, a sampling module upsampling an original frame when the pixel accuracy is less than a pixel size, and before searching for a motion vector in a layer having a lower resolution than the original frame downsampling the original frame into the low resolution, a motion residual module calculating a residual between motion vectors found in the respective layers, and a rearrangement module rearranging the residuals between the found motion vectors and the found variable block size information using significance obtained from a searched lower layer. Accordingly, true motion scalability can be achieved to improve adaptability to changing network circumstances.

    摘要翻译: 提供了一种用于支持可伸缩视频编码中的运动矢量的可扩展性的方法和装置。 运动估计装置包括:运动估计模块,用于根据预定的像素精度搜索可变块大小和每个层的成本函数最小化的运动矢量;当像素精度小于像素尺寸时,采样模块对原始帧进行上采样 并且在将具有比原始帧低的原始帧的分辨率低的层的运动矢量搜索到低分辨率之前,运动残差模块计算在各个层中找到的运动矢量之间的残差,以及重新排列模块 找到的运动矢量之间的残差和使用从搜索到的下层获得的显着性的找到的可变块大小信息。 因此,可以实现真实的运动可伸缩性,以提高对网络环境变化的适应性。

    Bit-rate control method and apparatus for normalizing visual quality
    49.
    发明申请
    Bit-rate control method and apparatus for normalizing visual quality 审中-公开
    用于使视觉质量正常化的比特率控制方法和装置

    公开(公告)号:US20050084015A1

    公开(公告)日:2005-04-21

    申请号:US10968491

    申请日:2004-10-20

    摘要: A scalable video codec includes an encoder that encodes an original moving picture; a rate control unit that allocates an optimal amount of bits for each coding unit based on a bit-rate desired by a user; a pre-decoder that receives a bit-stream and extracts a bit-stream having an appropriate amount of bits; and a decoder that decodes image sequences of the moving picture from the extracted bit-stream, so as to reconstruct the original moving picture. In particular, the present invention focuses on the operation performed in the rate control unit 340. The rate control unit operates a definition step of a bit-rate function available for use in the predecoder, a pre-summation step to thereby obtain the uniform visual quality, an approximation to determine the distortion function, and a normalization step to allow the total allocated bit-rates to be equal to a target bit-rate.

    摘要翻译: 可分级视频编解码器包括对原始运动图像进行编码的编码器; 速率控制单元,其基于用户期望的比特率为每个编码单元分配最佳的比特量; 接收比特流并提取具有适当位数的比特流的预解码器; 以及解码器,其从提取的比特流解码运动图像的图像序列,以便重构原始运动图像。 特别地,本发明着重于在速率控制单元340中执行的操作。 速率控制单元操作可用于预解码器的比特率函数的定义步骤,预先求和步骤,从而获得均匀的视觉质量,确定失真函数的近似值,以及允许总数的归一化步骤 分配的比特率等于目标比特率。