Video coding method and apparatus
    91.
    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 predecoding and decoding bitstream including base layer
    92.
    发明申请
    Method and apparatus for predecoding and decoding bitstream including base layer 有权
    用于对包括基本层的比特流进行预解码和解码的方法和装置

    公开(公告)号:US20060013300A1

    公开(公告)日:2006-01-19

    申请号:US11180634

    申请日:2005-07-14

    申请人: Woo-jin Han

    发明人: Woo-jin Han

    摘要: A method and apparatus for extracting a higher quality video stream for a given bit-rate by replacing a specific frame by a base layer frame at a predecoder are provided. A predecoding method performed by the predecoder includes selecting a mode by determining frames to be skipped according to a predetermined criterion among frames located at positions where the base layer exists, and extracting a portion of the bitstream according to the selected mode and extraction conditions.

    摘要翻译: 提供了一种用于通过在预解码器处由基本层帧替换特定帧来为给定比特率提取较高质量视频流的方法和装置。 由预解码器执行的预解码方法包括:通过根据位于基层存在的位置的帧中的预定标准来确定要跳过的帧来选择模式,并且根据所选择的模式和提取条件提取比特流的一部分。

    Method and apparatus for supporting motion scalability
    93.
    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。

    Apparatus and method for scalable video coding providing scalability in encoder part
    94.
    发明申请
    Apparatus and method for scalable video coding providing scalability in encoder part 审中-公开
    用于可缩放视频编码的装置和方法,其在编码器部分中提供可扩展性

    公开(公告)号:US20050169379A1

    公开(公告)日:2005-08-04

    申请号:US11043929

    申请日:2005-01-28

    摘要: A method and apparatus for scalable encoding providing scalability in an encoder. The scalable video encoding apparatus includes a mode selector that determines a temporal filtering order of a frame and a predetermined time limit as a condition for determining to which frame temporal filtering is to be performed, and a temporal filter which performs motion compensation and temporal filtering, according to the temporal filtering order determined in the mode selector, on frames that satisfy the above-described condition. According to the method and apparatus, since scalability is provided in the encoder, stability in the operation of real-time, bidirectional video streaming applications, such as video conferencing, can be ensured.

    摘要翻译: 一种用于在编码器中提供可扩展性的可伸缩编码的方法和装置。 可分级视频编码装置包括模式选择器,其确定帧的时间滤波顺序和预定时间限制作为用于确定要对哪个帧进行时间滤波的条件;以及时间滤波器,其执行运动补偿和时间滤波, 根据在模式选择器中确定的时间滤波顺序,在满足上述条件的帧上。 根据该方法和装置,由于在编码器中提供了可扩展性,因此可以确保视频会议等实时双向视频流应用的运行的稳定性。

    Bit-rate control method and apparatus for normalizing visual quality
    95.
    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。

    Method and apparatus for transforming and inverse-transforming image
    99.
    发明授权
    Method and apparatus for transforming and inverse-transforming image 有权
    用于变换和逆变换图像的方法和装置

    公开(公告)号:US08649624B2

    公开(公告)日:2014-02-11

    申请号:US13304073

    申请日:2011-11-23

    IPC分类号: G06K9/36 G06K9/46

    摘要: Provided are a method and apparatus for transforming an image, in which an input image is transformed into a frequency domain by selectively using a plurality of frequency transform algorithms according to a frequency characteristic of the input image. The method includes: selecting a frequency transform algorithm to be used for a current block from a plurality of frequency transform algorithms according to a result obtained by transforming frequencies of peripheral blocks adjacent to the current block; and transforming the current block into a frequency domain by using the selected frequency transform algorithm.

    摘要翻译: 提供了一种用于变换图像的方法和装置,其中通过根据输入图像的频率特性选择性地使用多个频率变换算法将输入图像变换为频域。 该方法包括:根据通过变换与当前块相邻的外围块的频率获得的结果,从多个频率变换算法中选择要用于当前块的频率变换算法; 并通过使用所选择的频率变换算法将当前块变换成频域。