变长编码 meaning in Chinese
variable-length encoding
Examples
- This paper first research on main technologies used by avs standard , which include prediction , transform , quantization , in - loop filter , and entropy encoding , and then focus on the 2d - vlc entropy coder of avs , which is context - based adaptive coder . this encoder operates on run - level pair , and it uses the type of current block and value of current coefficients to switch vlc code - table . these tables are designed according to the distribution of transformed coefficients , and this way is much better than using only one table to code all residual coefficients in one 8x8 block
本文首先详细研究了avs标准的核心技术,包括预测编码、变换量化、环路滤波器以及扫描和熵编码等,之后重点研究了avs标准中使用的基于上下文的2d - vlc变长编码方法,这种方法编码的是( run , level )数对,同时根据当前编码块的类型和残差系数这两种上下文信息来切换码表,这些码表是预先根据变换系数在不同位置的分布信息设计好的,这样要比只使用一个变长码表来编码块内所有位置上的残差系数的压缩效果要好得多。 - This thesis is part of the project of national science foundation of china “ study on color video coding based on four - dimensional matrix ” . a multi - matrix theory model has been established in the project . and the color video is presented into a four dimensional matrix model and the four - dimensional discrete cosine transform ( 4d - mdct ) is applied to reduce the correlation between color components and adjacent pixels
将多个彩色视频帧构建在一个四维矩阵模型中进行运动补偿预测、四维矩阵离散余弦变换和矩阵量化,最后利用基于上下文的变长编码方法进行压缩,以全面去除彩色视频各象素之间、各彩色分量之间以及连续帧之间的相关性,从而实现高信噪比条件下的高倍压缩。 - Recurring to resynchronization marker , data partitioning and rvlc , video files with errors are dealt with . the article codes and decodes video source files with errors , computing every algorithm ' s psnr , comparing video pictures " subjective and objective quality
运用重同步标志( resyncmarker ) 、数据分离( datapartitioning )和可逆变长编码( rvlc )对含错的视频文件分别做错误处理。以mpeg - 4错误恢复方法对糟糕视频源文件编码、解码，计算该算法的psnr ，比较视频帧的主客观质量。