搜索结果: 1-13 共查到“信息处理技术 MPEG-7”相关记录13条 . 查询时间(0.383 秒)
针对MPEG的去块效应技术的研究及其VLSI实现
方块效应 区域分类 自适应滤波
2010/11/25
现今随着数据压缩的广泛应用，以及MPEG视频编解码的普遍使用，块效应噪声也随之而来。为了消除块效应、提高视频质量，许多去块效应的算法[2-12]被人们所提出，然而大部分算法的运算量都很大，不适合应用在视频处理芯片上。针对这个问题，H.-S. Kong等人[13]提出了一种新的自适应后处理算法，该算法既能有效消除块效应又大幅度地降低了运算量，然而对图像边缘信息保护不够。本文在H.-S. Kong等人...
Rate Distortion Modeling of Skip Mode and Early Skip Mode Selection for H.264/MPEG-4 AVC
Rate Distortion Modeling Skip Mode Early Skip Mode
2009/12/31
This paper proposed a linear rate-distortion (RD) cost model for skip mode in H.264. The proposed RD cost model is derived theoretically based on the quantization scheme of H.264, and the simulation r...
提出直接从MPEG数据流中寻找和跟踪运动物体的新算法.寻找是基于运动矢量的区域增长法,运动矢量的获得通过一个专门的滤波器,该滤波器主要应用于运动物体的边界宏块,运动轨迹由DCT的DC和部分AC系数进行校正,该方法运算量小,能实时处理,实验结果较好.
一种基于八叉树的Huffman解码方法及其在MPEG-4中的应用
数据压缩 Huffman解码 八叉树
2009/4/3
传统的二值Huffman解码方法的解码效率较低。为了提高解码速度，该文提出了一种基于八叉树的Huffman解码方法。该方法将Huffman码表示为八叉树结构，并根据各个节点在树中的位置将码表重建为一维数组。解码时，每次从码流中读取3 bit码元，并使用数值计算代替判断和跳转操作，从而提高了解码效率。将本文方法应用于MPEG-4 VLC和RVLC解码的实验结果表明，该方法在内存增加不大的情况下能大幅...
一种用于MPEG-4形状编码的快速运动估计算法
运动估计 形状编码 MPEG-4
2009/3/26
该文提出了一种用于MPEG-4形状编码的快速运动估计算法。该算法利用了形状编码及形状信息的固有特性，即基于上下文的运动估计特性、相邻二值alpha块的运动矢量相关性以及形状信息的二值特性。模拟结果表明，该算法具有运算量少、处理速度快的特点，适用于MPEG-4形状编码的实时软件实现。
A Motion Vector Predictor Architecture for AVS and MPEG-2 HDTV Decoder,
Motion compensation Motion vector prediction AVS MPEG
2006/12/31
In the advanced Audio Video coding Standard (AVS), many efficient coding tools are adopted in motion compensation, such as new motion vector prediction, direct mode matching, variable block-sizes etc....
Reducing Spatial Resolution for MPEG-2 to H.264/AVC Transcoding
Reducing Spatial Resolution MPEG-2 to H.264/AVC Transcoding
2005/12/31
Transcoding is an important technique for reducing the bit rate or spatial resolution to meet the constrained transmission bandwidths and terminal capabilities. In this paper, we propose a spatial dow...
ERMSCT: MPEG-7 Based Didactical AV Courseware Building Tool for Heterogeneous Terminals
MPEG-7 Didactical AV Courseware Heterogeneous Terminals
2004/12/31
Now video courseware is not adaptive to heterogeneous terminals, and its description metadata is too much simple to efficiently and effectively search, store,and evaluate the teaching quality. For muc...
An Efficient VLSI Architecture of the Sample Interpolation for MPEG-4 Advanced Simple Profile
Efficient VLSI Architecture the Sample Interpolation MPEG-4 Advanced Simple Profile
2004/12/31
Sample interpolation which has a computationally expensive finite impulse response (FIR) digital filter is one of the key modules in MPEG-4 Advanced Simple Profile (ASP). Normal FIR architectures have...
Architectures of incorporating MPEG-4 AVC into three-dimensional wavelet video Coding,
MPEG-4 AVC three-dimensional wavelet video Coding
2004/12/31
3D subband video coding provides an elegant fulldimensional solution for scalable video coding. However,
due to the Motion-Compensated Temporal Filtering (MCTF) with open-loop structure and no good r...
Autmatic Moving Object Extraction in Mpeg Video
Autmatic Moving Object Extraction Mpeg Video
2003/12/31
In this paper, we propose a moving object extraction technique for MPEG coded data directly. It is a changebased
motion object extraction approach, which discriminates background and moving objects b...
MPEG Transcoding For DVD recording.
Learning and Synthesizing MPEG-4 Compatible 3-D Face Animation from Video Sequence
MPEG-4 Compatible 3-D Face Animation Video Sequence
2003/12/31
Learning and Synthesizing MPEG-4 Compatible 3-D Face Animation from Video Sequence.