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    • 6. 发明授权
    • Motion vector refinement for MPEG-2 to H.264 video transcoding
    • 用于MPEG-2到H.264视频转码的运动矢量细化
    • US08731061B2
    • 2014-05-20
    • US13546159
    • 2012-07-11
    • Anthony Peter JochMichael D. Gallant
    • Anthony Peter JochMichael D. Gallant
    • H04N7/50
    • H04N19/40H04N19/513H04N19/523H04N19/56H04N19/61
    • A method for transcoding that includes (A) generating a decoded frame by decoding an MPEG-2 input video stream, the decoded frame including decoded macroblocks; (B) determining a search center for encoding a current macroblock corresponding to a pair of the decoded macroblocks on consecutive macroblock rows, when (i) the encoding uses a predictive field mode and (ii) a current field being encoded is a second field of a current frame that has a first field as a reference field, the search center is a temporally scaled version of a decoded motion vector from an upper or a lower macroblock in the pair; (C) generating a refined motion vector by searching in a temporal search direction about the search center; and (D) generating an H.264 output video stream by encoding the current macroblock based on the refined motion vector.
    • 一种用于代码转换的方法,包括:(A)通过解码MPEG-2输入视频流来生成解码帧,解码的帧包括解码的宏块; (B)当(i)编码使用预测场模式时,确定用于编码与连续宏块行上的一对解码宏块对应的当前宏块的搜索中心,并且(ii)被编码的当前场是第二场 具有第一场作为参考场的当前帧,搜索中心是来自该对中的上或下宏块的解码运动矢量的时间缩放版本; (C)通过在关于搜索中心的时间搜索方向上搜索来生成精细运动矢量; 和(D)通过基于精细运动矢量对当前宏块进行编码来生成H.264输出视频流。
    • 8. 发明授权
    • Refinement of motion vectors in hierarchical motion estimation
    • 运动矢量在分层运动估计中的优化
    • US08149915B1
    • 2012-04-03
    • US11947044
    • 2007-11-29
    • Pavel NovotnyMichael D. GallantLowell L. Winger
    • Pavel NovotnyMichael D. GallantLowell L. Winger
    • H04N7/12
    • H04N19/53H04N19/56
    • A method of motion estimation (ME) refinement. The method generally includes the steps of (A) generating an initial motion vector (MV) by conducting a first ME on an initial block in a picture, the initial block covering an initial area of the picture, (B) generating a current MV by conducting a second ME on a current block in the picture, (i) the current block covering a subset of the initial area and (ii) the second ME being seeded by the initial MV, (C) generating at least one additional MV by conducting at least one third ME on the current block, the at least one third ME being seeded respectively by at least one neighboring MV spatially adjacent to the current MV and (D) generating a refined MV of the current block by storing in a memory a best among the current MV and the additional MV.
    • 一种运动估计(ME)改进方法。 该方法通常包括以下步骤:(A)通过在图像中的初始块上进行第一ME生成初始运动矢量(MV),初始块覆盖图像的初始区域,(B)通过 在图像中的当前块上执行第二ME,(i)覆盖初始区域的子集的当前块和(ii)由初始MV接收的第二ME,(C)通过进行至少一个额外的MV生成 在当前块上的至少一个第三ME,所述至少一个第三ME分别由与当前MV空间相邻的至少一个相邻MV接种,并且(D)通过在存储器中存储最佳地生成当前块的精细MV 在当前MV和额外的MV之间。
    • 9. 发明授权
    • High quality, low memory bandwidth motion estimation processor
    • 高品质,低内存带宽运动估计处理器
    • US07933331B2
    • 2011-04-26
    • US12237741
    • 2008-09-25
    • Michael D. GallantEric C. Pearson
    • Michael D. GallantEric C. Pearson
    • H04N7/28H04N7/36H04N7/48H04N7/50
    • H04N5/145H04N19/43H04N19/433
    • An apparatus generally having a first circuit and a second circuit is disclosed. The first circuit may be configured to (i) copy a plurality of first reference samples of a first reference image from an external memory, the first reference samples being proximate a first position within the first reference image and (ii) generate a first motion vector corresponding to a first current block of a current image by searching among the first reference samples. The second circuit may be configured to (i) copy a plurality of second reference samples of the first reference image from the external memory, the second reference samples being (a) proximate a second position within the first reference image and (b) non-adjacent the first reference samples and (ii) generate a second motion vector corresponding to the first current block by searching among the second reference samples.
    • 公开了一种通常具有第一电路和第二电路的装置。 第一电路可以被配置为(i)从外部存储器复制第一参考图像的多个第一参考样本,第一参考样本靠近第一参考图像内的第一位置,并且(ii)生成第一运动矢量 对应于当前图像的第一当前块,通过在第一参考样本之间进行搜索。 第二电路可以被配置为(i)从外部存储器复制第一参考图像的多个第二参考样本,第二参考样本是(a)接近第一参考图像内的第二位置,以及(b) 邻近第一参考样本,并且(ii)通过在第二参考样本之间进行搜索来生成与第一当前块对应的第二运动向量。
    • 10. 发明授权
    • Multi-standard variable block size motion estimation processor
    • 多标准可变块大小运动估计处理器
    • US07702020B2
    • 2010-04-20
    • US11937632
    • 2007-11-09
    • Michael D. GallantEric C. Pearson
    • Michael D. GallantEric C. Pearson
    • H04N7/12G06K9/36
    • H04N5/145H04N19/107H04N19/109H04N19/43H04N19/523H04N19/57H04N19/61
    • An apparatus generally having a first circuit and a second circuit is disclosed. The first circuit may be configured to generate a plurality of sum values by adding a plurality of pixel difference values between a current block and a reference block, one of the sum values corresponding to each of a plurality of smallest partitions of the current block. The second circuit configured to (i) generate a plurality of intermediate values from the sum values, one of the intermediate values corresponding to each of a plurality of possible partitions of the current block, (ii) store a plurality of lowest values among the intermediate values as the current block is moved through a search window and (iii) generate a motion signal conveying at least one motion vector based on the lowest values.
    • 公开了一种通常具有第一电路和第二电路的装置。 第一电路可以被配置为通过在当前块和参考块之间添加多个像素差值来生成多个和值,其中的一个值对应于当前块的多个最小分区中的每一个。 第二电路被配置为(i)从和值生成多个中间值,与当前块的多个可能分区中的每一个对应的中间值之一,(ii)在中间值中存储多个最低值 通过搜索窗口移动当前块的值,并且(iii)基于最低值生成传送至少一个运动矢量的运动信号。