公开(公告)号：US20120155556A1

公开(公告)日：2012-06-21

申请号：US13191132

申请日：2011-07-26

申请人： Yingwei Chen ,  Dagnachew Birru ,  James Wallace Wendorf

发明人： Yingwei Chen ,  Dagnachew Birru ,  James Wallace Wendorf

IPC分类号： H04N7/26

CPC分类号： H03M13/356 ,  H03M13/29 ,  H04N19/67 ,  H04N19/89

摘要： A multimedia stream system includes a transmitter and a multimedia data stream receiver. The transmitter at receives raw multimedia data and generates uniform error correction data and a standard multimedia data stream. The multimedia data stream receiver receives the standard multimedia data stream containing encoded multimedia data and the uniform error correction data for error correction of encoded multimedia data.

摘要翻译： 多媒体流系统包括发射机和多媒体数据流接收机。 发射机接收原始多媒体数据，并产生统一的纠错数据和标准多媒体数据流。 多媒体数据流接收器接收包含编码多媒体数据的标准多媒体数据流和用于编码多媒体数据的纠错的统一纠错数据。

公开(公告)号：US20110047607A1

公开(公告)日：2011-02-24

申请号：US12806601

申请日：2010-08-16

申请人： Yingwei Chen ,  Zheng Yang

发明人： Yingwei Chen ,  Zheng Yang

IPC分类号： G06F7/04

CPC分类号： H04L63/0838 ,  G06F21/31 ,  G06F21/43 ,  H04L9/32 ,  H04L63/08 ,  H04L63/083 ,  H04L63/0861

摘要： Verifying a user includes: receiving a service request; generating a text based first dynamic password upon receiving the service request; converting the first dynamic password into sound information; transmitting the sound information to a user terminal over a communication network; receiving over the Internet a second dynamic password entered by the user based on the sound information, the second dynamic password being a text based password; comparing the first and second dynamic passwords for consistency; and indicating that verification is successful if the first and the second dynamic passwords are consistent.

摘要翻译： 验证用户包括：接收服务请求; 在接收到服务请求时生成基于文本的第一动态密码; 将第一个动态密码转换成声音信息; 通过通信网络将声音信息发送到用户终端; 通过互联网接收基于所述声音信息由用户输入的第二动态密码，所述第二动态密码是基于文本的密码; 比较第一和第二动态密码的一致性; 并且指示如果第一和第二动态密码一致，验证是成功的。

公开(公告)号：US20060056455A1

公开(公告)日：2006-03-16

申请号：US10537134

申请日：2003-11-28

申请人： Carles Ruiz Floriach ,  Yingwei Chen

发明人： Carles Ruiz Floriach ,  Yingwei Chen

IPC分类号： H04J3/22

CPC分类号： H04L65/608 ,  H04L12/66 ,  H04L29/06027 ,  H04L65/1016 ,  H04L65/80 ,  H04N21/234327 ,  H04N21/23611 ,  H04N21/2381 ,  H04N21/2662 ,  H04N21/4363 ,  H04N21/4381 ,  H04N21/631 ,  H04N21/6437 ,  H04N21/64792

摘要： Network streams and a method for encapsulating media packets having data therein into the network streams. The network streams includes a base layer stream and an enhancement layer stream. Base-layer media packets are encapsulated into the network packets of the base layer stream, wherein each network packet of the base layer stream includes one, and no more than one, corresponding base-layer media packet. Enhancement-layer media packets are encapsulated into the network packets of the enhancement layer stream, wherein a first portion and a second remaining portion of any enhancement-layer media packet may be respectively included in successive network packets of the enhancement layer stream in order to have each network packet of the enhancement layer stream filled to a constant number of bits that does not exceed a maximum number of bits. The media packets are, but not limited to, video packets or audio packets.

摘要翻译： 网络流和用于将其中具有数据的媒体分组封装到网络流中的方法。 网络流包括基本层流和增强层流。 基层媒体分组被封装到基层流的网络分组中，其中基本层流的每个网络分组包括一个且不超过一个对应的基本层媒体分组。 增强层媒体分组被封装到增强层流的网络分组中，其中任何增强层媒体分组的第一部分和第二剩余部分可以分别包括在增强层流的连续网络分组中，以便具有 增强层流的每个网络分组被填充到不超过最大比特数的常数比特数。 媒体分组是但不限于视频分组或音频分组。

公开(公告)号：US07010037B2

公开(公告)日：2006-03-07

申请号：US10295669

申请日：2002-11-15

申请人： Jong Chul Ye ,  Yingwei Chen

发明人： Jong Chul Ye ,  Yingwei Chen

IPC分类号： H04N7/18

CPC分类号： H04N19/147 ,  H04N19/18 ,  H04N19/187 ,  H04N19/19 ,  H04N19/37 ,  H04N19/61

摘要： A system and method are disclosed that provide a simple and efficient layered video coding technique using a backward adaptive rate-distortion optimized data partitioning (RD-DP) of DCT coefficients. The video coding system may include an rate-distortion optimized data partitioning encoder and decoder. The RD-DP encoder adapts the partition point block-by-block which greatly improves the coding efficiency of the base layer bit stream without explicit transmission thereby saving the bandwidth significantly. The RD-DP decoder can also find the partition location in backward-fashion from the decoded data.

摘要翻译： 公开了一种使用DCT系数的后向自适应速率失真优化数据划分（RD-DP）提供简单而有效的分层视频编码技术的系统和方法。 视频编码系统可以包括速率失真优化的数据分割编码器和解码器。 RD-DP编码器逐块调整分区，大大提高了基本层比特流的编码效率，无需显式传输，从而显着节省带宽。 RD-DP解码器还可以从解码数据中以后向方式找到分区位置。

公开(公告)号：US06990146B2

公开(公告)日：2006-01-24

申请号：US09995999

申请日：2001-11-16

申请人： Yingwei Chen

发明人： Yingwei Chen

IPC分类号： H04N7/18

CPC分类号： H04N19/103 ,  H04N19/126 ,  H04N19/136 ,  H04N19/172 ,  H04N19/196 ,  H04N19/44 ,  H04N19/60 ,  H04N19/85

摘要： The present invention relates to a method and system for extracting coding parameters from uncoded video data. Encoded video data is decoded using an MPEG decoder to produce decompressed video data. A DC computation operation is performed to recover an intra-dc-precision level from the decompressed video data, such that if the intra-dc-precision level is less than a first predetermined threshold, the decompressed video data is classified as an intra-coded picture. If the intra-dc-precision level is equal to the first predetermined threshold, a discrete cosine transform (DCT) is performed to produce a set of DCT coefficients for at least one AC frequency band in the decompressed video data. Then, an average quantizer step size is computed based on the AC data and if the average quantizer step size is greater than a second predetermined threshold, the decompressed video data being processed is classified as an intra-coded picture. Thereafter, the quantization matrix data of a frame of the decompressed video data is extracted. In addition, a quantizer scale and a DCT type value for each block of the decompressed video data is extracted.

公开(公告)号：US06925126B2

公开(公告)日：2005-08-02

申请号：US09837036

申请日：2001-04-18

申请人： Tse-Hua Lan ,  Yingwei Chen ,  Zhun Zhong

发明人： Tse-Hua Lan ,  Yingwei Chen ,  Zhun Zhong

IPC分类号： G06T9/00 ,  H04N19/156 ,  H04N21/258 ,  H04N21/2662 ,  H04N21/462 ,  H04N7/12

CPC分类号： H04N21/4621 ,  H04N19/126 ,  H04N19/132 ,  H04N19/156 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/59 ,  H04N19/61 ,  H04N19/90 ,  H04N21/25808 ,  H04N21/2662

摘要： A method and system of regulating the computation load of an MPEG decoder in a video processing system are provided. The video processing system processes the header information of a compressed video data stream including a plurality of macroblocks with a motion vector associated therewith. Then, the computation load of each functional block of the MPEG decoder is adjusted according to predetermined criteria; thus, substantial computational overhead is desirably avoided.

摘要翻译： 提供了一种在视频处理系统中调节MPEG解码器的计算负荷的方法和系统。 视频处理系统处理包括具有与其相关联的运动矢量的多个宏块的压缩视频数据流的标题信息。 然后，根据预定标准调整MPEG解码器的每个功能块的计算负荷; 因此，期望避免大量的计算开销。

公开(公告)号：US06826232B2

公开(公告)日：2004-11-30

申请号：US09467589

申请日：1999-12-20

申请人： Yingwei Chen ,  Hayder Radha ,  Mihaela Van Der Schaar

发明人： Yingwei Chen ,  Hayder Radha ,  Mihaela Van Der Schaar

IPC分类号： H04N718

CPC分类号： H04N19/34 ,  H04N19/129 ,  H04N19/14 ,  H04N19/176

摘要： The present invention is directed to a method for encoding video data in an embedded fashion in order to achieve fine granular scalable video. The method includes the video data being transformed into a plurality of DCT coefficients. Further, the DCT coefficients are arranged into sub-groups and the DCT coefficients are scanned according to the sub-groups. The DCT coefficients being scanned by the sub-groups enables a higher level of scalability to be achieved.

摘要翻译： 本发明涉及一种用于以嵌入方式对视频数据进行编码的方法，以便实现细粒度可缩放视频。 该方法包括将视频数据变换为多个DCT系数。 此外，DCT系数被布置成子组，并且根据子组扫描DCT系数。 由子组扫描的DCT系数能够实现更高级别的可扩展性。

公开(公告)号：US06810083B2

公开(公告)日：2004-10-26

申请号：US09996003

申请日：2001-11-16

申请人： Yingwei Chen ,  Jorge Caviedes

发明人： Yingwei Chen ,  Jorge Caviedes

IPC分类号： H04N712

CPC分类号： H04N17/004 ,  H04N19/60 ,  H04N19/85

摘要： The present invention relates to a method and system for evaluating the quality of encoded video data without gaining access to the source data or the compressed video bitstream. The system is configured to decode compressed video data using an MPEG decoder to produce decompressed video data. The decoded data is analyzed to determine whether the decompressed video data is intra-coded. If so, a discrete cosine transform (DCT) is performed to produce a set of DCT coefficients for at least one AC frequency band in the decompressed video data. At the same time, quantization matrix data of a frame of the decompressed video data as well as a quantizer scale for each block of the decompressed video data are extracted. Thereafter, the variance of the converted DCT coefficients is obtained, and then an average quantization error for each set of said DCT coefficients is determined based on the variance, the quantization matrix, and the quantizer scale. Lastly, a peak signal to noise ratio (PSNR) is calculated based on the resultant average quantization error.

摘要翻译： 本发明涉及一种用于评估编码视频数据的质量而不获取对源数据或压缩视频比特流的访问的方法和系统。 该系统被配置为使用MPEG解码器对压缩的视频数据解码以产生解压缩的视频数据。 分析解码数据以确定解压缩的视频数据是否被帧内编码。 如果是这样，则执行离散余弦变换（DCT）以在解压缩的视频数据中产生用于至少一个AC频带的一组DCT系数。 同时，解压缩的视频数据的帧的量化矩阵数据以及解压缩的视频数据的每个块的量化器标度被提取。 此后，获得转换的DCT系数的方差，然后基于方差，量化矩阵和量化器尺度确定每组所述DCT系数的平均量化误差。 最后，基于所得到的平均量化误差来计算峰值信噪比（PSNR）。

公开(公告)号：US06501397B1

公开(公告)日：2002-12-31

申请号：US09578286

申请日：2000-05-25

申请人： Hayder Radha ,  Yingwei Chen ,  Mihaela Van Der Schaar-Mitrea

发明人： Hayder Radha ,  Yingwei Chen ,  Mihaela Van Der Schaar-Mitrea

IPC分类号： H03M700

CPC分类号： H04N19/34 ,  H04N19/12 ,  H04N19/147 ,  H04N19/184 ,  H04N19/436 ,  H04N19/46

摘要： The present invention is directed to a variable coding of the bit-planes for a particular source signal. This includes first partitioning or grouping the different bit-planes into embedded sub-signals and then coding each sub-signal. This technique enables an encoder according to the present invention to control and achieve a desired trade-off point between scalability and coding-efficiency. Therefore, in cases where bit or bit-plane level granularity is not required, coding efficiency can be improved by combining two or more bit-planes prior to coding. In addition, since the statistical nature of each bit-plane is different, the level of grouping used across the bit-planes can vary.

摘要翻译： 本发明涉及用于特定源信号的位平面的可变编码。 这包括首先将不同的位平面划分或分组成嵌入的子信号，然后对每个子信号进行编码。 这种技术使得根据本发明的编码器能够在可扩展性和编码效率之间控制和实现期望的权衡点。 因此，在不需要位或位平面级粒度的情况下，可以通过在编码之前组合两个或多个位平面来提高编码效率。 另外，由于每个位平面的统计特性不同，所以在平面上使用的分组水平可以变化。

公开(公告)号：US06480547B1

公开(公告)日：2002-11-12

申请号：US09419672

申请日：1999-10-15

申请人： Yingwei Chen ,  Mihaela Van Der Schaar ,  Hayder Radha

发明人： Yingwei Chen ,  Mihaela Van Der Schaar ,  Hayder Radha

IPC分类号： H04N712

CPC分类号： H04N19/34 ,  H04N19/13 ,  H04N19/29 ,  H04N19/61 ,  H04N19/63

摘要： There is disclosed a video encoder and a video decoder. The video encoder comprises base layer circuitry for receiving an input stream of video frames and generating compressed base layer video data for transmission to a streaming video receiver. The base layer video data comprises original transform coefficients (O) associated with the input stream of video frames and reconstructed base layer transform coefficients (B) associated with the original transform coefficients. The video encoder also comprises enhancement layer circuitry for receiving the original transform coefficients (O) and the reconstructed base layer transform coefficients (B) and generating a residual signal (R) proportional to a difference between the original transform coefficients (O) and the reconstructed base layer transform coefficients (B). The enhancement layer circuitry encodes and sends to the streaming video receiver a sign of the residual signal (R) and the bit planes of the residual signal (R). The video decoder comprises base layer circuitry for receiving compressed base layer video data and determining reconstructed base layer transform coefficients (B) associated with a quantization of the base layer video data. The video decoder further comprises enhancement layer circuitry for receiving enhancement layer video data associated with the compressed base layer video data and determining a residual signal (R) and a sign associated with the residual signal (R). The enhancement layer circuitry reconstructs enhancement layer transform coefficients (E) from the residual signal (R) and the plurality of reconstructed base layer transform coefficients (B).

摘要翻译： 公开了一种视频编码器和视频解码器。 视频编码器包括用于接收视频帧的输入流并生成用于传输到流式视频接收机的压缩基本层视频数据的基本层电路。 基层视频数据包括与视频帧的输入流相关联的原始变换系数（O）和与原始变换系数相关联的重建的基本层变换系数（B）。 视频编码器还包括用于接收原始变换系数（O）和重构的基本层变换系数（B）的增强层电路，并产生与原始变换系数（O）和重建的变换系数（O）之间的差成比例的残差信号 基层变换系数（B）。 增强层电路对流视频接收机编码残留信号（R）的符号和残留信号（R）的位平面。 视频解码器包括用于接收压缩的基本层视频数据和确定与基本层视频数据的量化相关联的重建的基本层变换系数（B）的基本层电路。 视频解码器还包括增强层电路，用于接收与压缩的基本层视频数据相关联的增强层视频数据，并确定残余信号（R）和与残留信号（R）相关联的符号。 增强层电路从剩余信号（R）和多个重建的基本层变换系数（B）重建增强层变换系数（E）。