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    NEAR VISUALLY LOSSLESS VIDEO RECOMPRESSION
    1.
    发明公开
    NEAR VISUALLY LOSSLESS VIDEO RECOMPRESSION 审中-公开
    近视力无损视频恢复

    公开(公告)号：EP3257245A1

    公开(公告)日：2017-12-20

    申请号：EP16704312.4

    申请日：2016-01-26

    申请人： Qualcomm Incorporated

    发明人： PANDA, Prasanjit ,  MALAYATH, Narendranath ,  MOORTHY, Anush, Krishna ,  TIWARI, Mayank

    IPC分类号： H04N19/124 ,  H04N19/172 ,  H04N19/14 ,  H04N19/40

    CPC分类号： H04N19/124 ,  H04N19/14 ,  H04N19/172 ,  H04N19/40 ,  H04N19/428 ,  H04N19/44 ,  H04N19/85

    摘要： Techniques are described for performing near visually lossless video recompression. The disclosed techniques generate video frames having relatively small bitrates and relatively small file sizes while retaining approximately a same level of visually perceivable video quality as the originally recorded video frames. In general, recompression of a video frame takes an input video frame and produces a second copy of the video frame that has the same or lower bitrate. The proposed techniques address the problem of recompressing a video frame with no perceivable loss in visual quality (i.e., visually lossless recompression) compared to the original recording of the video frame. In addition, the disclosed techniques provide one-step recompression of video frames that includes a single decoding and encoding of each video frame.

    MULTI-DIMENSIONAL NEIGHBORING BLOCK PREDICTION FOR VIDEO ENCODING
    2.
    发明授权
    MULTI-DIMENSIONAL NEIGHBORING BLOCK PREDICTION FOR VIDEO ENCODING 有权
    多维NACHBARBLOCKRPÄDIKTION用于视频编码

    公开(公告)号：EP1958448B1

    公开(公告)日：2011-07-27

    申请号：EP06815254.5

    申请日：2006-09-22

    申请人： Qualcomm Incorporated

    发明人： WANG, Kai ,  MALAYATH, Narendranath ,  NAGARAJ, Raghavendra C.

    IPC分类号： H04N7/26

    CPC分类号： H04N19/57 ,  H04N19/109 ,  H04N19/197 ,  H04N19/43 ,  H04N19/52 ,  H04N19/56 ,  H04N19/567 ,  H04N19/61

    摘要： The motion estimation techniques and video encoding device(s) described use a two dimensional pipeline to generate accurate motion estimation parameters for a current video block. The two dimensional pipeline uses previously calculated motion estimation parameters of relevant neighboring video blocks, including a preceding video block on a same row as the current video block, prior to the generation of the accurate motion vectors, motion vector predictors, and mode decision of the current video block The use of the two dimensional pipeline allows accurate motion vector prediction from neighboring video blocks previously not available, in the computation of motion vectors. Three engines may be used in the two dimensional pipeline, a fetch engine, an integer search engine and a fractional and spatial search engine. While the fetch engine and fraction and spatial search engine operate on one row, the integer search engine operates on another row.

    VIDEO CODING WITH FINE GRANULARITY SCALABILITY USING CYCLE-ALIGNED FRAGMENTS
    3.
    发明公开
    VIDEO CODING WITH FINE GRANULARITY SCALABILITY USING CYCLE-ALIGNED FRAGMENTS 有权
    与周期相一致破片细粒度可伸缩性BASIS视频编码

    公开(公告)号：EP2041977A2

    公开(公告)日：2009-04-01

    申请号：EP07799529.8

    申请日：2007-07-12

    申请人： QUALCOMM Incorporated

    发明人： BAO, Yiliang ,  MALAYATH, Narendranath ,  MANJUNATH, Sharath ,  YE, Yan

    IPC分类号： H04N7/26

    CPC分类号： H04N19/34

    摘要： The disclosure describes FGS video coding techniques that use cycle-aligned fragments (CAFs). The techniques may perform cycle-based coding of FGS video data block coefficients and syntax elements, and encapsulate cycles in fragments for transmission. The fragments may be cycle-aligned such that a start of a payload of each of the fragments substantially coincides with a start of one of the cycles. In this manner, cycles can be readily accessed via individual fragments. Some cycles may be controlled with a vector mode to scan to a predefined position within a block before moving to another block. In this manner, the number of cycles can be reduced, reducing the number of fragments and associated overhead. The CAFs may be entropy coded independently of one another so that each fragment may be readily accessed and decoded without waiting for decoding of other fragments. Independent entropy coding may permit parallel decoding and simultaneous processing of fragments.

    VIDEO ENCODING
    4.
    发明公开
    VIDEO ENCODING 审中-公开
    视频编码

    公开(公告)号：EP1982531A2

    公开(公告)日：2008-10-22

    申请号：EP07763672.8

    申请日：2007-02-08

    申请人： QUALCOMM Incorporated

    发明人： NAGARAJ, Raghavendra C. ,  WANG, Kai ,  MALAYATH, Narendranath

    IPC分类号： H04N7/26

    CPC分类号： H04N19/103 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/567 ,  H04N19/61

    摘要： An embodiment is directed to a method for selecting a predictive macroblock partition from a plurality of candidate macroblock partitions in motion estimation and compensation in a video encoder including determining a bit rate signal for each of the candidate macroblock partitions, generating a distortion signal for each of the candidate macroblock partitions, calculating a cost for each of the candidate macroblock partitions based on respective bit rate and distortion signals to produce a plurality of costs, and determining a motion vector from the costs. The motion vector designates the predictive macroblock partition.

    摘要翻译： 一个实施例涉及一种用于在视频编码器中从运动估计和补偿中选择来自多个候选宏块分区的预测宏块分区的方法，该方法包括：确定每个候选宏块分区的比特率信号;为每个候选宏块分区产生失真信号 候选宏块分区，基于各自的比特率和失真信号计算每个候选宏块分区的成本以产生多个成本，以及根据成本确定运动矢量。 运动矢量指定预测宏块分区。

    DISTORTION ESTIMATION FOR QUANTIZED DATA
    5.
    发明公开
    DISTORTION ESTIMATION FOR QUANTIZED DATA 审中-公开
    失真评估FOR DATA量化

    公开(公告)号：EP2119016A2

    公开(公告)日：2009-11-18

    申请号：EP08729316.3

    申请日：2008-02-07

    申请人： QUALCOMM Incorporated

    发明人： MALAYATH, Narendranath ,  MANJUNATH, Sharath

    IPC分类号： H03M7/30 ,  H04N7/26 ,  H04N7/50

    CPC分类号： H04N19/154 ,  H04N19/124

    摘要： Techniques for estimating distortion due to quantization of data are described. A histogram with multiple bins may be obtained for a set of coefficients to be quantized. Distortion due to quantization of the set of coefficients may be estimated based on the histogram and average distortions for the histogram bins. The number of coefficients in each bin may be multiplied with an average distortion for the bin to obtain a per-bin distortion. The per-bin distortions for all of the bins may be accumulated and scaled with a correction factor to obtain the estimated distortion. The techniques may be used to estimate distortions for a set of coding elements. Distortion and rate may be estimated for each coding element for each of multiple quantization steps. A set of quantization steps may be selected for the set of coding elements based on the estimated distortions and the estimated rates for the set of coding elements for different quantization steps.

    INTENSITY COMPENSATION TECHNIQUES IN VIDEO PROCESSING
    10.
    发明公开
    INTENSITY COMPENSATION TECHNIQUES IN VIDEO PROCESSING 审中-公开
    视频处理强度补偿技术

    公开(公告)号：EP2329650A1

    公开(公告)日：2011-06-08

    申请号：EP09791156.4

    申请日：2009-08-04

    申请人： Qualcomm Incorporated

    发明人： NAGARAJ, Raghavendra, C. ,  MOHAN, Sumit ,  MALAYATH, Narendranath ,  BHASKARA, Aravind

    IPC分类号： H04N7/26 ,  H04N7/50

    CPC分类号： H04N19/43 ,  H04N19/44 ,  H04N19/61 ,  H04N19/82

    摘要： Techniques for intensity compensation in video processing are provided. In one configuration, a wireless communication device compliant with the VC1-SMPTE standard (e.g., cellular phone, etc.) comprises a processor that is configured to execute instructions operative to reconstruct reference frames from a received video bitstream. A non-intensity-compensated copy of a reference frame of the bitstream is stored in a memory of the device and used for defining the displayable images and for on-the-fly generation of a stream of intensity-compensated pixels to perform motion compensation calculations for frames of the video bitstream.