专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US07010037B2 System and method for rate-distortion optimized data partitioning for video coding using backward adaptation 失效
标题翻译：用于使用向后适应的视频编码的速率失真优化数据划分的系统和方法
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。

22. 发明授权

US06990146B2 Method and system for detecting intra-coded pictures and for extracting intra DCT precision and macroblock-level coding parameters from uncompressed digital video 失效
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.

23. 发明授权

US06826232B2 Fine granular scalable video with embedded DCT coding of the enhancement layer 失效
标题翻译：精细粒度可扩展视频与嵌入式DCT编码的增强层
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。

24. 发明授权

US06810083B2 Method and system for estimating objective quality of compressed video data 失效
标题翻译：用于估计压缩视频数据的客观质量的方法和系统
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）。

25. 发明授权

US06501397B1 Bit-plane dependent signal compression 失效
标题翻译：位平面相关信号压缩
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。

26. 发明授权

US06480547B1 System and method for encoding and decoding the residual signal for fine granular scalable video 有权
标题翻译：用于对细粒度可缩放视频进行编码和解码残留信号的系统和方法
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）。

27. 发明授权

US06292512B1 Scalable video coding system 失效
标题翻译：可扩展视频编码系统
公开(公告)号：US06292512B1
公开(公告)日：2001-09-18
申请号：US09110616
申请日：1998-07-06
申请人： Hayder Radha , Yingwei Chen , Robert A. Cohen
发明人： Hayder Radha , Yingwei Chen , Robert A. Cohen
IPC分类号： H04N0718
CPC分类号： H04N21/658 , H04N19/34 , H04N21/6377
摘要： A system for coding video data comprised of one or more frames codes a portion of the video data using a frame-prediction coding technique, and generates residual images based on the video data and the coded video data. The system then codes the residual images using a fine-granular scalability coding technique, and outputs the coded video data and at least one of the coded residual images to a receiver.
摘要翻译：一种用于对由一个或多个帧组成的视频数据进行编码的系统使用帧预测编码技术对视频数据的一部分进行编码，并且基于视频数据和编码的视频数据生成残差图像。然后，该系统使用细粒度可伸缩性编码技术对残留图像进行编码，并将编码的视频数据和至少一个编码残差图像输出到接收机。

28. 发明申请

US20090080514A1 SENDER SIDE CHANNEL ADAPTIVE VIDEO TRANSMISSION 审中-公开
公开(公告)号：US20090080514A1
公开(公告)日：2009-03-26
申请号：US11719265
申请日：2005-11-14
申请人： Yingwei Chen
发明人： Yingwei Chen
IPC分类号： H04N7/12
CPC分类号： H04N21/23406 , H04N19/132 , H04N19/152 , H04N19/164 , H04N19/176 , H04N19/18 , H04N19/188 , H04N19/46 , H04N19/48 , H04N19/59 , H04N21/234327 , H04N21/2402 , H04N21/2662 , H04N21/44004 , H04N21/8455
摘要： A channel adaptive video transmission system and method. A system (10) is provided that includes: a variable length decoding system (VLD) (14) for generating header codes and discrete cosine transform (DCT) run length codes from the compressed video signal; a DCT codes marking system (16) for inserting markers into the DCT run length codes to define marked DCT coefficient segments; and a bit stream processing system (18) that determines whether to keep marked DCT coefficient segments based on current channel conditions.
摘要翻译：一种信道自适应视频传输系统及方法。提供一种系统（10），其包括：用于从压缩视频信号产生报头代码和离散余弦变换（DCT）游程长度代码的可变长度解码系统（VLD）（14）; 用于将标记插入到DCT游程长度代码中以定义标记的DCT系数段的DCT代码标记系统（16）; 以及基于当前信道条件确定是否保持标记的DCT系数段的比特流处理系统（18）。

29. 发明申请

US20070223888A1 Digital Television Transmission With Error Correction 失效
标题翻译：数字电视传输与纠错
公开(公告)号：US20070223888A1
公开(公告)日：2007-09-27
申请号：US10574608
申请日：2004-09-30
申请人： Yingwei Chen , Dagnachew Birru , James Wendorf
发明人： Yingwei Chen , Dagnachew Birru , James Wendorf
IPC分类号： H04N7/64
CPC分类号： H03M13/356 , H03M13/29 , H04N19/67 , H04N19/89
摘要： In a transmitter, a standard stream of encoded multi-media data and uniform error correction data is transmitted through a first channel. The uniform error correction data provides substantially the same error correction for all portions of the encoded multimedia data. Simultaneously, additional unequal error correction data is generated for critical portions of the standard stream and not for other portions of the standard stream, and the additional error correct data is transmitted through a second channel. In a receiver, the additional error correct data is used to error correct just the critical portions of the standard stream, and then the uniform error correction data is used to error correct all the portions of the encoded multimedia data of the standard stream.
摘要翻译：在发射机中，编码的多媒体数据的标准流和均匀纠错数据通过第一信道传输。均匀纠错数据为编码的多媒体数据的所有部分提供基本相同的纠错。同时，为标准流的关键部分而不是标准流的其他部分生成附加的不相等的纠错数据，并且通过第二通道发送附加的错误正确数据。在接收机中，使用附加的错误校正数据来错误地校正标准流的关键部分，然后使用均匀纠错数据来错误校正标准流的编码多媒体数据的所有部分。

30. 发明授权

US07092448B2 Method and system for estimating no-reference objective quality of video data 有权
公开(公告)号：US07092448B2
公开(公告)日：2006-08-15
申请号：US10155211
申请日：2002-05-24
申请人： Deepak S. Turaga , Yingwei Chen , Jorge Caviedes
发明人： Deepak S. Turaga , Yingwei Chen , Jorge Caviedes
IPC分类号： H04N7/12
CPC分类号： H04N17/004
摘要： The present invention relates to a method and system for estimating the quality of encoded video data without gaining access to the source data. The system is configured to decode compressed video data using an MPEG/H.263 decoder to produce decompressed video data. The decoded data is subject to a discrete cosine transform (DCT) to produce a set of DCT coefficients of the decompressed video data is determined to be intra-coded. Meanwhile, the quantization matrix including a quantizier step size for each block of the decompressed video data are extracted. Following this, statistical properties of the DCT coefficients are extracted from the decoded video. Then, an average quantization error for both AC and DC coefficients is determined using information regarding the quantization and the statistical properties. Finally, this estimated quantization error is used for in computing a peak signal to noise ratio (PSNR).

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式