中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

150 records (took 0.033 seconds)

    Facsimile-based video compression method and system
    1.
    发明授权
    Facsimile-based video compression method and system 失效
    基于传真的视频压缩方法和系统

    公开(公告)号：US5740278A

    公开(公告)日：1998-04-14

    申请号：US606043

    申请日：1996-02-16

    Applicant: Toby Berger ,  Yi-Jen Chiu

    Inventor： Toby Berger ,  Yi-Jen Chiu

    IPC: G06T9/00 ,  H04N7/32 ,  H04N7/36 ,  H04N7/46 ,  G06K9/36 ,  H04N7/12

    CPC classification number: H04N19/00 ,  H04N19/503 ,  H04N19/507 ,  H04N19/587 ,  H04N19/59 ,  H04N19/93

    Abstract: A method and system for compressing and decompressing video image data in real time employs thresholding and facsimile-based encoding to eliminate the need for computationally intensive two-dimensional transform-based compression techniques. The method operates first by forming a difference frame which contains only information pertaining to the difference between a current video image frame and a computed approximation of the video image frame. The difference frame is fed to a thresholder which categorizes each pixel in the frame as being either in a first set having intensities above or at a preset threshold, or a second set having intensities below a preset threshold. A facsimile-based compression algorithm is then employed to encode the first set of above or at threshold pixel locations. To compress the intensity data for each above or at threshold pixel, a quantizer and lossless encoder are preferably employed, with the quantizer serving to categorize the intensities by groups, and the lossless encoder using conventional coding, such as Huffman coding, to compress the intensity data further. Various techniques may be employed with the embodiments of the invention to adjust the actual amount of compressed data generated by the method and system to accommodate communication lines with different data rate capabilities.

    Abstract translation: 用于实时压缩和解压缩视频图像数据的方法和系统采用阈值和基于传真的编码，以消除对基于计算密集型二维变换的压缩技术的需要。 该方法首先通过形成仅包含与当前视频图像帧和计算出的视频图像帧的近似之间的差异的信息的差分帧来操作。 差分帧被馈送到将帧中的每个像素分类为具有高于或处于预设阈值的强度的第一组的阈值器，或者具有低于预设阈值的强度的第二组。 然后采用基于传真的压缩算法对上述第一组或阈值像素位置进行编码。 为了压缩每个上述或阈值像素处的强度数据，优选地采用量化器和无损编码器，量化器用于按组分组强度，并且使用诸如霍夫曼编码的常规编码的无损编码器来压缩强度 数据进一步。 本发明的实施例可以采用各种技术来调整由方法和系统生成的压缩数据的实际量，以适应​​具有不同数据速率能力的通信线路。

    Byte-based prefix encoding
    2.
    发明授权
    Byte-based prefix encoding 失效
    基于字节的前缀编码

    公开(公告)号：US5973626A

    公开(公告)日：1999-10-26

    申请号：US42509

    申请日：1998-03-17

    Applicant: Toby Berger ,  Yi-Jen Chiu ,  Mikio Kawahara

    Inventor： Toby Berger ,  Yi-Jen Chiu ,  Mikio Kawahara

    IPC: H03M7/42 ,  H03M7/40 ,  H03M7/00

    CPC classification number: H03M7/42

    Abstract: Two software-only prefix encoding techniques employ encoding look-up tables to produce contributions to the encoded bit stream that are incremented in integral numbers of bytes to facilitate accelerated encoding rates at the expense of an acceptable trade-off in increased memory size requirements. The first technique, referred to as offset-based encoding, employs encoding tables which eliminate most of the bit-based operations that need to be performed by a prefix encoder without inordinately expanding memory requirements. In offset-based encoding, a Huffman table is employed which contains information for each number of bits by which the length of a Huffman word is offset from an integral number of bytes. The encoding method generates bytes of encoded data, even though the Huffman code has variable length code words for each symbol to be encoded. The second technique, referred to as byte-based encoding, employs a byte-based Huffman encoding table which operates even faster than the offset-based encoding scheme because it does not employ any bit-based operations at all; however, this is achieved at the expense of a considerable expansion in memory requirements.

    Abstract translation: 两个仅软件前缀编码技术采用编码查找表来产生对以字节为单位递增的编码比特流的贡献，以便以增加的存储器大小要求的可接受的折衷为代价来加速编码速率。 称为基于偏移的编码的第一种技术使用编码表，其消除了需要由前缀编码器执行的大部分基于位的操作，而不会不断扩大存储器需求。 在基于偏移的编码中，使用霍夫曼表，其包含每个比特数的信息，通过该信息，霍夫曼字的长度与整数字节偏移。 编码方法生成编码数据的字节，即使霍夫曼代码对于要编码的每个符号具有可变长度代码字。 被称为基于字节的编码的第二种技术采用基于字节的霍夫曼编码表，其基于偏移的编码方案运行甚至更快，因为它完全不采用任何基于位的操作; 然而，这是以大量的内存需求扩张为代价的。

    SYSTEM AND METHOD FOR ENHANCED DMVD PROCESSING
    3.
    发明申请
    SYSTEM AND METHOD FOR ENHANCED DMVD PROCESSING 有权
    用于增强DMVD处理的系统和方法

    公开(公告)号：US20140146890A1

    公开(公告)日：2014-05-29

    申请号：US13996582

    申请日：2010-12-21

    Applicant: Yi-Jen Chiu ,  Yi-Jen Chiu ,  Wenhao Zhang ,  Hong Jiang

    Inventor： Yi-Jen Chiu ,  Yi-Jen Chiu ,  Wenhao Zhang ,  Hong Jiang

    IPC: H04N19/51 ,  H04N19/436

    CPC classification number: H04N19/513 ,  H04N19/436 ,  H04N19/44

    Abstract: To let decoder side motion vector derivation (DMVD) coded blocks be decoded in parallel, decoder side motion estimation (ME) dependency on spatially neighboring reconstructed pixels can be removed. Mirror ME and projective ME are only performed on two reference pictures, and the spatially neighboring reconstructed pixels will not be considered in the measurement metric of the decoder side ME. Also, at a video decoder, motion estimation for a target block in a current picture can be performed by calculating a motion vector for a spatially neighboring DMVD block, using the calculated motion vector to predict motion vectors of neighboring blocks of the DMVD block, and decoding the DMVD block and the target block in parallel. In addition, determining a best motion vector for a target block in a current picture can be performed by searching only candidate motion vectors in a search window, wherein candidate motion vectors are derived from a small range motion search around motion vectors of neighboring blocks.

    Abstract translation: 为了使解码器侧运动矢量导出（DMVD）编码块并行解码，可以去除对空间相邻的重建像素的解码器侧运动估计（ME）依赖性。 镜像ME和投影ME仅在两个参考图像上执行，并且在解码器侧ME的测量度量中将不考虑空间相邻的重建像素。 此外，在视频解码器中，可以使用所计算的运动矢量来计算当前图像中的目标块的运动估计，以通过计算空间相邻的DMVD块的运动矢量来预测DMVD块的相邻块的运动矢量，以及 对DMVD块和目标块进行并行解码。 此外，通过仅在搜索窗口中仅搜索候选运动矢量来执行确定当前图片中的目标块的最佳运动矢量，其中，从围绕相邻块的运动矢量的小范围运动搜索导出候选运动矢量。

    Power efficient motion estimation techniques for video encoding
    6.
    发明授权
    Power efficient motion estimation techniques for video encoding 有权
    用于视频编码的功率有效的运动估计技术

    公开(公告)号：US09591326B2

    公开(公告)日：2017-03-07

    申请号：US13638628

    申请日：2010-03-31

    Applicant: Lidong Xu ,  Yi-Jen Chiu ,  Hong Jiang

    Inventor： Lidong Xu ,  Yi-Jen Chiu ,  Hong Jiang

    IPC: H04N19/53 ,  H04N19/30 ,  H04N19/187 ,  H04N19/37 ,  H04N19/33 ,  H04N19/57 ,  H04N19/105 ,  H04N19/174 ,  H04N19/61 ,  H04N19/176 ,  H04N19/573 ,  H04N19/109

    CPC classification number: H04N19/53 ,  H04N19/105 ,  H04N19/109 ,  H04N19/174 ,  H04N19/176 ,  H04N19/187 ,  H04N19/30 ,  H04N19/33 ,  H04N19/37 ,  H04N19/57 ,  H04N19/573 ,  H04N19/61

    Abstract: Adaptive control can use hierarchical motion estimation (HME) and/or multiple reference motion estimation (MRME) for the motion estimation of current encoding blocks. Both HME and MRME are allowed in the motion estimation to achieve a high coding gain. Control consists of slice level control and macro-block (MB) level control. A slice is one or more contiguous macroblocks. In slice level control, it is decided to use only one reference frame or use multiple reference frames to coding current slice based on the motion vectors obtained in coarse level motion estimation. In MB level control, it is decided to perform MRME or perform HME for the MB and its subblocks based on the coarse level motion vectors of the MB.

    Abstract translation: 自适应控制可以对当前编码块的运动估计使用分层运动估计（HME）和/或多参考运动估计（MRME）。 在运动估计中允许HME和MRME两者实现高编码增益。 控制由片级控制和宏块（MB）级控制组成。 切片是一个或多个连续的宏块。 在片级控制中，决定仅使用一个参考帧或者使用多个参考帧来基于在粗略级运动估计中获得的运动矢量对当前片进行编码。 在MB级别控制中，决定执行MRME或基于MB的粗略级别运动向量对MB及其子块执行HME。

    CROSS-CHANNEL RESIDUAL PREDICTION
    10.
    发明申请
    CROSS-CHANNEL RESIDUAL PREDICTION 审中-公开
    跨渠道残留预测

    公开(公告)号：US20140219347A1

    公开(公告)日：2014-08-07

    申请号：US14244411

    申请日：2014-04-03

    Applicant: Lidong Xu ,  Yi-Jen Chiu ,  Yu Han ,  Wenhao Zhang

    Inventor： Lidong Xu ,  Yi-Jen Chiu ,  Yu Han ,  Wenhao Zhang

    IPC: H04N19/61

    CPC classification number: H04N19/105 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61

    Abstract: Systems, apparatus and methods are described including determining a prediction residual for a channel of video data; and determining, using the first channel's prediction residual, a prediction residual for a second channel of the video data. Further, a prediction residual for a third channel of the video data may be determined using the second channel's prediction residual.

    Abstract translation: 描述了系统，装置和方法，包括确定视频数据的信道的预测残差; 以及使用所述第一信道的预测残差来确定所述视频数据的第二信道的预测残差。 此外，可以使用第二信道的预测残差来确定视频数据的第三信道的预测残差。

Patent Agency Ranking