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分层编码     
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  layered coding
     Unequal Error Protection Based on Layered Coding and OFDM
     基于分层编码和OFDM的不等差错保护
短句来源
     Reliable multicast transport protocol mainly includes NACK、ACK based tree、asynchronous layered coding (ALC) androuting assistance protocol.
     可靠组播数据传输协议主要有基于NACK的协议、基于树的ACK协议、异步分层编码协议(ALC)以及路由辅助协议。
短句来源
     Comparison between Layered Coding and Multiple Description Coding for Video Streaming
     视频流传输的分层编码与多重描述编码技术的比较
短句来源
     All notes were categorized in layered coding by the retroactive content analysis method.
     采用回顾性的内容分析法,将各种记录内容进行分层编码,归类;
短句来源
     Due to the combination of PFGS layered coding and Turbo coding with the overall multimedia transmission, the simulation results demonstrated that the algorithm was simple, efficient, accurate, and suitable for various wireless transmission environment.
     结合PFGS分层编码和turbo码 ,对整个多媒体数据传输进行了仿真 ,仿真结果表明该预测算法简单准确 ,精度较高
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  scalable coding
     Scalable coding of MPEG-4
     MPEG-4分层编码
短句来源
     A Scalable Coding Scheme for Videoconference Complied with H.263 Recommendation
     一种与H.263建议兼容的会议电视分层编码方案
短句来源
     Based on the schototics analysis of the two kinds of DCT coefficients, a scalable coding scheme complied with H.263 recommendation is proposed.
     在对运动图象序列的两类DCT系数进行统计分析的基础上,提出了一种与H.263建议完全兼容的会议电视分层编码方案。
短句来源
     This paper investigates all kinds of hierarchical layer structures including media object's semantic expression with hierarchical layer structure, scalable coding, MPEG-4's hierarchical bitstreams organization and delivery multimedia integration framework.
     对MPEG-4中各种分层结构进行了深入的剖析,包括媒体对象语义的分层表达,媒体对象的分层编码,MPEG-4码流的分层组织及最终的多媒体集成传送框架的分层实现等。
短句来源
     In the consideration of the effect of network behaviors, the traditional QoS mechanism isanalyzed and a new video-oriented QoS method which applies the scalable coding of H.263 isproposed. Then a service-based QoS qualitative description method and a QoS negotiationmechanism are proposed.
     考虑到网络行为对差错的影响,本文针对传统的 QoS 控制机制存在的问题,提出了一种面向视频业务的 QoS 控制策略,该策略结合 H.263 分层编码方法,提出了面向业务的 QoS 定性描述方法,并引入了 QoS 协商机制。
短句来源
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  layered encoding
     Based on the quality adaptation mechanism for video playback in the context of unicast and the proxy caching mechanism for VOD system,a proxy caching quality adaptation mechanism is proposed using layered encoding model for realtime streaming media playback in the context of multicast over the Internet. The algorithms of add layer and drop layer and the processes of layer allocation and layer replacement in the proxy cache are discussed.
     在视频单点播放质量适应机制和 VOD系统的代理缓冲机制的基础上 ,就 Internet上流媒体的实时多点播放系统提出了一种以分层编码为模型的代理缓冲质量适应机制 ,着重讨论了数据层的增加和丢弃算法及数据层在代理缓冲空间中的分配和替代过程。
短句来源
  hierarchical coding
     A Still Picture Hierarchical Coding Scheme Based on Wavelet Transform
     基于小波分析的静止图像分层编码方法
短句来源
     An inter frame 3D DCT subband hierarchical coding is proposed in this paper Compared with other coefficient layered coding,this method can get hierarchy of time layer and space layer at the same time Also,it can overcome frequency aliasing effect in general subband coding,and is more flexible than the resolution layered coding which uses temporal subsampling and spacial filter Computer simulation for several well known sequences shows us it can realize the hierarchical image coding which is suitable for the future communication.
     与其它变换系数分层编码相比 ,3D -DCT变换编码概念的引入 ,使该方法可以在实现空间方向分层的同时 ,实现时间方向分层。 另外 ,它比采用时间方向亚抽样和空间滤波器的分辨率分层方法更灵活 ,并克服了频率混叠现象。
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  layered coding
A new variable bit rate layered coding scheme based on subband coding is given in this paper.
      
In this paper, we examine the performance of specific implementations of multiple description coding and of layered coding for video streaming over error-prone packet switched networks.
      
It is shown that, given specific implementations, there is a large variation in relative performance between multiple description coding and layered coding depending on the employed transmission scheme.
      
For scenarios where the packet transmission schedules can be optimized in a rate-distortion sense, layered coding provides a better performance.
      
The proxy can perform media adaptation on its own, either relying on layered coding or using transcoding mainly in the decompressed domain.
      
更多          
  scalable coding
Furthermore, multiple description scalable coding (MDSC) is investigated, and novel MDSC schemes based on 3D wavelet coding are proposed, using the lifting implementation of temporal filtering.
      
This algorithm is designed to maximize the quality of transmitting fine-scalable coded content by exploiting the embedding property of scalable coding.
      
The proposed scheme is directly applicable to scalable coding of multimedia, such as MPEG-4 scalable video coding.
      
We present a video object extraction and scalable coding system designed to meet the above objectives.
      
A uniform resolution scalable coding system can still work properly but might transmit completely unacceptable quality video to the client.
      
更多          
  layered encoding
An alternative to versions is layered encoding, which can also provide multiple quality levels.
      
Layered encoding requires less server storage capacity and may be more suitable for caching; but it typically increases transmission bandwidth due to encoding overhead.
      
Keeping these issues in mind, we propose to take the following approach to layered encoding of human activity in the Sensorium.
      
Multi-layered encoding alone cannot solve all the problems associated with the varying bandwidth constraints in multicast applications.
      
This is the well-known trade-off typically addressed by transcoders and layered encoding schemes.
      
更多          
  hierarchical coding
The suggested methods make it possible to take advantage of the hierarchical coding of images and take into account the special features of geographic information systems.
      
While semantic relations are expressed through an hierarchical coding over the attribute space, episodic links are realized via specific synaptic projections.
      
Hierarchical coding in the perception and memory of spatial layouts
      
The issues we discuss include quality of service, resource reservations, routing, error and traffic control, heterogeneity, and the use of hierarchical coding and open-loop control techniques.
      
The paper presents a hierarchical coding algorithm for 3D medical images based upon hierarchical interpolation with radial basis function networks.
      
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