DWT BASED HMM FOR FACE RECOGNITION

A novel Discrete Wavelet Transform (DWT) based Hidden Markov Module (HMM) for face recognition is presented in this letter. To improve the accuracy of HMM based face recognition algorithm, DWT is used to replace Discrete Cosine Transform (DCT) for observation sequence ex- traction. Extensive experiments are conducted on two public databases and the results show that the proposed method can improve the accuracy significantly, especially when the face database is large and only few training images are available.

BFA BASED NEURAL NETWORK FOR IMAGE COMPRESSION

A novel Bacterial Foraging Algorithm (BFA) based neural network is presented for image compression. To improve the quality of the decompressed images, the concepts of reproduction, elimination and dispersal in BFA are firstly introduced into neural network in the proposed algorithm. Extensive experiments are conducted on standard testing images and the results show that the pro- posed method can improve the quality of the reconstructed images significantly.

谈数字视频监控的集大成时代

数字视频监控已经到了集大成的时代,其中视频压缩编解码在向多格式和高清化方向发展。数字媒体SoC经过几度的大集成,所涉及的不仅是芯片硬件系统上,而且是在软件系统上的全面集成。

大展宏图数字视频监控新时代——饯析视频监控用压缩芯片的市场格局

视频监控既要有监视的威慑力，又要有干预的控制力。这就要求视频监控既要实现全面高清化，又要全面智能化，但实现这些不能以大幅度增加系统造价和成本为代价。在二十一世纪的第二个十年，数字视频监控产业的发展将进入了-一个全新的时代，

SOC：推进数字视频监控创新的动力

在数字信息时代，任何一个新兴市场的蓬勃发展都离不开集成电路的有力支持，而往往集成电路技术的革新和突破又会对新兴市场起到促进作用，综观安防市场的蓬勃发展正是很好的体现。

高清智能 焕然一“芯”——新一代单片架构在IP摄像机中的创新

随着数字视频监控向网络化的全面发展，IP摄像机的创新理念可以由“高清智能”来概括并解读，因此，本文主要集中阐述对“高清智能”新架构的理解和感悟。

使VoIP用户体验超越QoS

目前，大多数传统网络服务供应商才刚开始推出VoIP服务。在早期阶段，众多供应商仅提供简单的VoIP通信功能，而VoIP的管理功能最多也只能算作初级水平。一旦出了问题，供应商缺乏解决问题的工具和技能。即便是能与ILEC展开竞争的新一代VoIP服务供应商也难以快速明确问题的原因并解决问题。