搜索结果: 1-15 共查到“信息处理技术 H.264/AVC”相关记录15条 . 查询时间(0.083 秒)
基于纹理特征的H.264/AVC顽健视频水印算法
顽视频水印 H.264/AVC 纹理特征
2011/11/28
在分析现有视频水印算法的基础上，结合H.264压缩编码标准的特性，提出了一种新的基于纹理特征的视频顽健水印算法。算法先对当前帧4×4块进行整数离散余弦变换，判断其是否是纹理块，再采用能量差的方式自适应选择系数嵌入水印。实验结果表明，该算法对视频质量和码率的影响较小，并且能有效抵抗高斯噪声、低通滤波、重编码等常见的视频水印攻击。
Novel Statistical Modeling, Analysis and Implementation of Rate-Distortion Estimation for H.264/AVC Coders
Novel Statistical Modeling Analysis Rate-Distortion Estimation
2010/6/30
Novel Statistical Modeling, Analysis and Implementation of Rate-Distortion Estimation for H.264/AVC Coders.
A Novel Rate Estimation Model for Mode Decision of H.264/AVC
Rate Estimation Model Mode Decision H.264/AVC
2009/12/31
To acquire the optimal coding mode of each macroblock, the H.264/AVC encoder exhaustively calculates the ratedistortion cost for all available modes and chooses the minimum one as the best mode. There...
视频图像复杂度估计的H.264/AVC码率控制
码率控制 H.264/AVC 视频编码
2009/10/10
为了在相对有限的传输比特率下获得最佳的视觉质量，严格地保证编码比特流满足带宽和假设参考解码缓冲区的限制，码率控制成为视频图像压缩技术中重要的一部分。根据指数型率失真模型，调和平均数预测当前帧的图像复杂度，提出了一种新的H.264/AVC码率控制改进算法。实验数据表明，调和平均数方法相比于线性预测方法更为有效和准确。相比于JVT-G012码率控制算法，新算法获得了较高的比特预测精度，具备更优的缓冲区...
优化的H.264/AVC码率控制算法
码率控制 量化参数 平均绝对值差
2009/10/9
由于通信信道带宽有限，有必要对视频编码的输出码率进行控制。基于视频编码标准H.264采用的码率控制算法，在初始QP值的设定以及宏块层码率控制方面提出了改进。在初始QP值的计算上，提出了利用基于bpp、熵和梯度的图像复杂度对初始QP值进行估计的方法。另外利用时间上的预测信息和空间上的MAD梯度信息在宏块层对MAD预测进行了改进，能更有效地实现对码率的精确控制。实验结果表明，与H.264标准参考软件J...
基于DSP的H.264/AVC滤波器优化设计
H.264编码 环内去块效应滤波器 DSP平台 流水线
2009/8/20
在H.264/AVC视频标准中，自适应环路滤波器用于消除预测和变换过程中引入的块效应，提高编码性能，但它具有较高的复杂性，占据大量的运算时间。针对这一问题，设计和实现一种基于数字信号处理DSP平台的流水线设计方法，采用条件判断减少跳转，利用并行性加速运算。实验数据表明，该方法能提高环路滤波器的效率。
Effective algorithms for fast transcoding of AVS to H.264/AVC in the spatial
AVS H.264/AVC Transcoding Mode mapping
2007/12/31
This paper proposes a transcoding scheme from AVS to H.264/AVC. As highcompression
video coding standards, H.264/AVC jointly developed by MPEG and ITU and
AVS developed by the Audio Video Coding Sta...
A context-based adaptive fast Intra_4x4 prediction mode decision algorithm for H.264/AVC video coding
context-based fast Intra_4x4 prediction mode decision algorithm H.264/AVC video coding
2007/12/31
In this paper, we propose a context-based adaptive fast Intra_4x4 prediction mode decision algorithm for H.264/AVC. Firstly, a 3-order Markov random field model is introduced to describe the spatial d...
A Novel Two-Pass VBR Coding Algorithm for the H.264/AVC Video Coder Based on a New Analytical R-D Model
Two-Pass VBR Coding Algorithm the H.264/AVC Video Coder Analytical R-D Model
2007/12/31
In this paper, the generalized Gaussian distribution is employed first to model the 16(4*4) integer transform coefficients of the residue image in H.264 videos. Then the distortion-rate function of ge...
Adaptive Block-Size Transform Based on Extended Integer 8x8/4x4 Transforms for H.264/AVC
Block-Size Transform Extended Integer 8x8/4x4 Transforms H.264/AVC
2006/12/31
In this paper, a low-complexity Adaptive Block-size Transform (ABT) scheme is proposed for the H.264/AVC.The integer 8x8/4x4 discrete cosine transforms with an extended relation are applied to the pro...
Short Change Detection on H.264/AVC Compressed Video
Short Change Detection H.264/AVC Compressed Video
2005/12/31
Abstract—This paper deals with the problem of shot-change detection on H.264/AVC compressed video. As H.264/AVC employs several new coding tools, the statistic information of
macroblock is different ...
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...
Rate-distortion analysis for H.264/AVC video coding and its application to rate control
Rate-distortion analysis H.264/AVC video coding rate control
2005/12/31
In this paper, an efficient rate-control scheme for H.264/AVC video encoding is proposed. The redesign of the quantization scheme in H.264/AVC results in that the relationship between the quantization...
AN IMPLEMENTED ARCHITECTURE OF DEBLOCKING FILTER FOR H.264/AVC
IMPLEMENTED ARCHITECTURE DEBLOCKING FILTER H.264/AVC
2004/12/31
H.264/AVC is a new international standard for the compression of natural video images, in which a deblocking filter has been adopted to remove blocking artifacts. In this paper, we propose an efficien...
Mode Mapping Method for H.264/AVC Spatial Downscaling Transcoding
Mode Mapping Method H.264/AVC Spatial Downscaling Transcoding
2004/12/31
Transcoding is a very effective method for universal media adaptation. Spatial resolution downscaling is one of the most popular transcoding applications. Although a number of transcoding methods have...