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Joint Project For Digital Mobile Multimedia Communiucation Research

数字移动多媒体通信研究联合项目

基本信息

批准号：
06044206
负责人：
TOMINAGA Hideyoshi
金额：
$ 11.2万
依托单位：
Waseda University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06044206/
关键词：
Mobile Multimedia MPEG-4 Very Low Bitrate Communication High Compression Information Refrigerator Data Processibility Feature Analysis Scalability Face Tracking 極小ゾーン

项目摘要

Based on the last year's activity results, three major research activities have been done during this year : Comparison and evaluation of key technologies, Development of verification model, Development and implementation of video coding method based on a structuring model called Video Document Architecture.First, on comparison and evaluation ofkey technologies. Test were performed after classifying the possible algorithms by their functionalities, the class of test sequences and their bitrates. MPEG-1 was used as an anchor for CIF format, and H : 263 for QCIF of CIF.Results show that the anchor and block-based methods tend to behave better performance at higher bitrates around 10kbps, and that the framerate is one of the most influential factors on the decoded images. Candidates of promising key technologies include combination of long and short term memories, wavelet coding on intra frames, combination of global MC and local affine MC,block partitioning, matching pursuits, etc.Next, on development of verification model. Long lasting discussion finally reached an agreement that the verification model should have the plural input video contents as video object planes, and that it should hold the following technologies : H.263 extended motion vectors and advanced prediction modes, quadtree coding for binary alpha and quadtree coding plus VQ for grayscale alpha, boundary coding by padding.Finally, on development and implementation of coding method based on Video Document Architecture. A coding format based on the concept of structured video is developed. According to this concept, a set of picture information is separated into some structural factors, saved as materials to be part of video sequence. When in video editing, these materials are selectively manipulated or synthesized to generate a whole new sequence. The editing simulation indicate that the workload for editing process becomes significantly improved.

在去年活动成果的基础上，本年度主要开展了三项研究活动：关键技术的比较与评价、验证模型的开发、基于视频文档结构模型的视频编码方法的开发与实现。在对可能的算法按其功能、测试序列类别和比特率分类后进行测试。采用MPEG-1作为CIF格式的锚点，采用H：263作为CIF的QCIF格式。结果表明，基于锚点和基于块的方法在10 kbps左右的较高比特率下往往表现出更好的性能，并且帧速率是对解码图像影响最大的因素之一。有前途的关键技术包括长短期记忆相结合、帧内小波编码、全局MC和局部仿射MC相结合、分块、匹配追踪等。经过长时间的讨论，最终达成一致意见，即验证模型应该具有多个输入视频内容作为视频对象平面，并且它应该具有以下技术：H.263扩展的运动矢量和高级预测模式，用于二进制alpha的四叉树编码和用于灰度alpha的四叉树编码加VQ，通过填充的边界编码。最后，基于视频文档结构的编码方法的开发与实现。提出了一种基于结构化视频概念的编码格式。根据这一概念，将一组图像信息分解成若干结构因子，作为素材保存下来，成为视频序列的一部分。在视频编辑中，这些材料被选择性地操纵或合成，以生成一个全新的序列。编辑模拟表明，编辑过程的工作量得到显着改善。