Along with the development of digital compression technology and ip networks , the transmission of real - time multimedia especially real - time video & audio on the ip networks has been a research hotspot in the recent years 随着数字压缩技术和ip网络技术的发展，实时多媒体特别是实时视音频的ip网络传输成为了近年来研究的一个热点。
The principle , linchpin technologies and flow of the mpeg - 1 layer audio encode algorithm are discussed in detail in this paper . the realization and optimization of lame mp3 audio encode algorithm are also introduced in this paper 本文详细论述了mpeg - 1第三层音频编码算法的原理、关键技术和算法流程以及lame算法的硬件实现和优化,用以实现音频的实时编码。
There is a simple resource management scheme applied to the local environment only : in the case of scarce resources , audio is prioritized over video , i . e , audio playback is maintained ( if possible ) whereas single video frames might be skipped 有一种用于局部环境的简单的资源管理方案：对于稀少资源，音频的优先高于视频，即音频播放尽可能保持而单个视频帧可以跳过。
Mr . yamaguchi pointed out that realizing the possibilities for expanding feature differentiation of electrical devices unique user interfaces , and to be equipped with high quality audio video specifications are major problems yet to clear 山口先生还介绍说，实现家电制造商各自分级的功能扩展与用户界面以及采用可实现高质量视频与音频的技术规格仍然是一个重大课题。
In real - time multimedia , the data of real - time video & audio , especially the real - time video are very big . the transmission of real - time video & audio puts forward a very high requirement to the bandwidth , delay , jitter of the networks 在实时多媒体数据中，实时视音频，尤其是实时视频的数据量是非常大的，实时视音频的传输对网络的带宽、延时和抖动等方面都提出了极高的要求。
When holding a video conference over a network , a common concern is how to maintain video and audio quality when the performance of the network is changing . the pcs - g50 provides three advanced functions to enhance qos over a network 当通过网络会进行视频会议时，一个共同关心的问题是当网络的性能不断变化时，如何维持视频及音频的品质， pcs - g50提供了三个高级功能以提高网络服务品质
Among this , the making and processing techniques of graphics , image , animation , audio information , as well as the realization of system integrating is emphasized . in the meantime , the application of visual basic6 is also discussed in depth 其中，重点说明了本课件中图形、图像、动画、音频的制作与处理技术、系统集成时主要技术的实现，并对visualbasic6的应用进行了深入的探讨。
The audio information is sampled and measured and coded by the dsp card . the process speed is quick . there are a filter circuit , a power check circuit and a range - frequency characteristic check circuit which are designed to check the system status 在硬件上，采用dsp语音处理技术，由高品质的dsp2000音频卡进行音频信息的采集、量化和编码操作，不但提高了音频的质量，也提高了音频处理的速度。
In the h . 323 video conference system , it transmits the media with multicast instead of unicast . in order to achieve real time and interaction goal of the system , it controls the quality of media transmission with qos technologies and strategies 323型系统，会议中视音频的传输不再采用单播，而采用组播技术实现，并利用qos策略和机制实现对媒体流的服务质量进行控制，以达到视频会议所需的实时和交互要求。
Then some key techniques in mpeg - 2 and mpeg - 4 recommendations are studied and compared in detail , including motion estimation , motion compensation , discrete cosine transform , inverse discrete cosine transform , variable length coding and layered description of picture and code stream 然后深入研究了mpeg - 2建议的视频编码标准，包括ts流、 ps流、时钟恢复、视频与音频的同步、基于场的运动补偿、 dct及变长编码。
