On the basis of enhancing the quality of the communication , the mechanism that the communication agent identifies automatically the clients which have many different character - set scheme is improved and specific project is designed 改进了通讯代理对多码制客户端的自动识别机制，使得服务器端对多码制客户端的识别更加准确，通讯更加稳定。
In this way , the distortion of high coefficients is increased by allocating less bits to them while the distortion of low coefficients is reduced relatively by allocating more bits to them when the total bit - rate is constant 在码率一定的情况下，通过加大高频分量的失真，降低其所占码率，可以相应地分配更多码字给低频分量，从而减小低频分量失真。
The three poor distressed men , too anxious for their condition to get any sleep , were however set down under the shelter of a great tree , at about a quarter of a mile from me , and as i thought out of sight of any of the rest 那三个可怜的人，深为自己目前的处境忧虑，睡也睡不着，只好在一棵大树的荫凉下呆呆地坐着，离我大约一百多码远。而且，看样子其他人看不见他们坐的地方。
If we can get network bandwidth information in detail and tune encoding and streaming method , the whole stream media system will be improved . we design one active measuring bandwidth - based multi - rates encoding and streaming system . by probing bandwidth information , we ' can make unit multi - format , multi - rates encoding policy 本论文着重设计这样的系统，它能主动的预先获得网络带宽情况，并根据带宽制定分级的多码率编码策略，可以同时编码不同格式的流媒体文件，也可以将多种码率的流编码到单个的流媒体文件中。
In all kinds of complicated network , oriented linking and unlinking , communication frequency resource is strained , and bandwith to transmitting audio frequency signal is too restricted , complicated and fluky , while audio frequency data exponential have been increased in the last several years . under the circumstances , based on the research of predecessor , this paper studies wavelet analysis ' s maths gist and practices significance on signal process , and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data , which gives attention to coding efficiency , multirate and compression delay . simulation experiment on the arithmetic has been done by matlab 针对无连接和面向连接的各种复杂网络环境下,通信频带资源紧张,音频传输带宽有限且复杂多变,而各种音频数据又日益增多的局面,本文研究小波分析在信号处理方面的数学依据和在数据压缩方面的实际意义,在前人不断工作的基础上,提出了一种优化小波包变换编码方案用于音频数据的压缩算法,兼考虑了编码效率、多码率和压缩时延多个方面,并在matlab环境下做了仿真实验，对各种音频信号及多种小波函数做了仿真结果比较,实验结果证明该算法可以在一定计算复杂度下可以很好地改进压缩效果,达到多码率下实现实时编解码的过程,在高速dsp芯片等硬件设备支持下,可以有效应用于实际复杂多变信源编码。
Harq , amc and multi - code in hsdpa have replaced the osvf and power control technology in release99 protocol . in a short time , the ues who are near to nodeb can be allowed to transfer more data with some higher modulation method . it increases the throughput of certain ues , as well as the throughput of a cell Hsdpa采用harq 、 amc 、多码传输等技术替代release99中物理信道使用的变扩频因子( osvf )和功率控制技术,使靠近nodeb的用户在短期内可以得到更多传输数据量和更高阶的编码调制组合,提高用户吞吐量,使系统从短期的变化中受益。
We give a clear mathematical description of it and prove that it can be used in current avs standard . pcbe build up a mapping using recursion , and this mapping can help to reduce these redundancies . because multi - tables switch and escape code technologies are employed in avs , pcbe is improved to support multi - tables switch and escape code , and we get some new recursion expressions and code tables for avs 由于avs标准中的2d - vlc算法使用了多码表切换以及escape码等技术,所以针对avs标准的特点对算法进行了面向多码表切换以及escape码处理的修改,推导出了适用于avs标准的递归公式并统计了修改后pcbe编码器的码表,然后在avs标准的参考软件中实现了本算法。
Because the conventional video coding schemes base on single antenna but not multiple antenna . the video signal should be decomposed into several sub - stream before it transmits over mimo - ofdm . this paper proposes a multiple description video coding scheme to match the multiple antenna system . we use a method based on 3d - sipht to re - arrange the coefficients into wavelet trees according to their spatio - temporal representation . each wavelet tree is coded and decoded independently , thus , the performance of error resilience for this scheme can be improved 本文提出的视频多码流分解是基于3d - spiht技术的改进,这种基于小波的信号分解产生的多零树,可以通过对每个小波树独立的进行高效压缩编码来增加传输鲁棒性,压缩产生的比特流可以灵活地组合成不同数量的码流,这样就同时兼顾了分解和压缩。
With the support of hardware devices such as dsp chip , this arithmetic has effective application on complicated practice source coding . this paper alse applies wavelet to multicarrier modem / demodem transfer . the use of the induced wavelet package improves this arithmetic to search best wavelet package basis , and boosts up the support to multirate 本文同时应用小波变换到多载波调制解调传输方面,通过推导出诱导小波包,改进最优小波包基搜索算法,增强了对多码率业务的支持性,在多载波传输系统中,是有效的提高信干比的方法。
Furthermore , we implement the bandwidth - based capturing , and encoding sub - system . in client end , in order to improve user ' s experience , we design one bandwidth - aware - based player , which using bandwidth measuring technology too . after getting real - time bandwidth parameter , the player then will negotiate with server ' s bandwidth manager and download appreciate stream form media server library 采用多码率的最终目的是为了使用产能选择最佳的流媒体，因此，本文在客户端播放器中也应用了带宽测量技术，实时获得带宽，通过与流媒体发布服务器协商播放最佳的流格式文件，或者在单一流文件中获得合适的流。
