macroblocks造句
例句与造句
- the motion vector of adjacent macroblocks ( spatial or temporal ) is used as the initial searching vector of the current macroblock, to search a multistage in an involute-like scanning
在大多数情况下，图像中运动的变化在图像内和图像间往往是连续的。 - the second technique is error tracking . it is implemented at the encoder . it can terminated the error-progagation affects by intra refreshing the affected macroblocks
差错跟踪技术在编码器方实现，它通过把受错误感染的宏块重新采用帧内编码模式来中止错误的扩散。 - in packet based wireless video communications, when best band distribution, not only source distortion should be considered, but also channel distortion caused by channel errors . the existing macroblock-layer rate control schemes calculates quantization parameters of all macroblocks ( mb ) in a frame in a raster scan order, and then encodes the mbs in the same order . actually, the quantization distortion is heavily dependent upon the coding order of mbs
在基于包的无线视频传输中，最佳带宽分配时，不仅要考虑信源编码失真，也要考虑由于信道差错引起的信道失真；已有的宏块层码率控制算法以矩阵扫描的顺序计算一帧中所有宏块的量化参数，事实上量化失真与宏块的编码顺序有很大关系，改变宏块的编码顺序，使复杂的宏块分配到更多的比特数，显然能大大提高编码效率。 - this paper also present a method that reduces the computational requirements of the encoder, while still upholding picture fidelity and remaining compatible with the h . 263 bitstream standard . often a substantial number of inter-macroblocks in the encoder are reduced to all-zero values after quantization . we introduced a method of predicting when those macrobolcks will quantize to zeros, which in turn allows us to eliminate the computation that would normally be required for those macroblocks
在编码器中宏块经过dct变换和量化后，总有一定数量的宏块的系数全为零，因此在进行dct转换前先进行预测，将那些预测系数全为零的宏块提前查找出来，然后将系数全为零的宏块azq（all-zeroquantizedcoefficients）直接送到熵编码模块进行可变长编码。 - this paper also present a method that reduces the computational requirements of the encoder, while still upholding picture fidelity and remaining compatible with the h . 263 bitstream standard . often a substantial number of inter-macroblocks in the encoder are reduced to all-zero values after quantization . we introduced a method of predicting when those macrobolcks will quantize to zeros, which in turn allows us to eliminate the computation that would normally be required for those macroblocks
在编码器中宏块经过dct变换和量化后，总有一定数量的宏块的系数全为零，因此在进行dct转换前先进行预测，将那些预测系数全为零的宏块提前查找出来，然后将系数全为零的宏块azq（all-zeroquantizedcoefficients）直接送到熵编码模块进行可变长编码。 - It's difficult to find macroblocks in a sentence. 用macroblocks造句挺难的
- compared with the traditional pixel domain video transcoding, the transcoding from hdtv to sdtv in the dct domain, not only avoids the dct and idct transforms, but also avoids motion estimation, the most computation costing process, by making full use of the macroblock motion vector information from the input hdtv stream to construct the motion vector for the according sdtv macroblocks . it ’ s helpful to achieve the hdtv to sdtv video transcoding in the real time
dct域hdtv至sdtv视频转码,与传统的像素域转码相比,不仅避免了dct、idct运算,还通过利用输入hdtv码流中宏块的运动矢量信息直接构造转码后sdtv相应宏块的运动矢量,避免了运算量极大的运动估计过程,有利于hdtv至sdtv实时转码的实现。 - in intra-frame postprocessing error concealment techniques in this dissertation, interpolating pixel values within a damaged macroblock from its four 1-pixel-wide boundaries and introducing the texture information from its four adjacent blocks can improve the quality of reconstructed image . it was found that the visual texture in damaged macroblocks can be reconverted with his algorithm in experiment
本文提出的一种基于视频帧内后处理的错误隐藏算法，采用帧内纹理恢复的内插技术，将相关性最强的象素作为损坏块内插的信息源，并引入相邻块的纹理信息，从而获得较好的图象恢复质量。