Studies in Signal Processing with Applications

在过去的30年里，数字信号处理（DSP）技术在诸如生物医学信号处理、声学、电信、图像和视频信号处理以及地震学等不同领域的信号处理中得到了广泛的应用。高分辨率，廉价，高速的A/D转换器和强大的VLSI形式的数字信号处理器的可用性为DSP在这些领域的不断扩展的应用提供了必要的动力。多维DSP技术越来越多地应用于从卫星、x射线等来源获得的图像和运动图像等多维信号的处理。视频电话和高清电视就是从二维和三维DSP领域的研究和发展进步中获得的产品的一些例子。本研究的总体目标是开发各种高效可靠的算法来滤波和处理信号（如图像、视频、语音和生物医学信号）。未来5年，我们将重点开展以下项目：***(a)我们打算探索使用离散技术变换（DTT）来代替DCT进行图像压缩，因为DTT的能量压缩和去相关特性与DCT非常相似，同时DTT可以实现快速的无乘法器。我们将特别关注数字地面电视的实现问题，以及我们在过去几年中提出的许多离散变换和算法。(b)实现认知无线电的一个关键挑战是所需的动态适应，这可以通过在接收机架构中集成可重构数字滤波器和滤波器组来实现。该子项目将解决区域高效可重构滤波器的设计，这将使可重构滤波器组的设计能够独立控制其子带的带宽和中心频率。***(c)我们建议开发一种智能监控系统，该系统具有检测、分类和识别人类行为的能力，并且仅在必要时才要求人类注意。该系统可用于家庭和楼宇监控、停车场监控等。它可以通过确定偏远地区病人或老年人的状况来加强卫生服务。***(d)我们打算解决跟踪多个运动目标到达方向的问题。这是在各种商业和军事应用的极大兴趣。***(e)生物医学应用算法的开发。特别是，我们打算开发处理长期脑电图记录的方法***这些项目的结果应该有利于电信，医疗信号处理，VLSI，图像和视频信号处理以及无线行业部门。***********

Digital signal processing (DSP) techniques have found a variety of applications over the last 30 years in processing of signals in such diverse areas as biomedical signal processing, acoustics, telecommunications, image and video signal processing, and seismology. The availability of high-resolution, inexpensive, high-speed A/D converters and powerful digital signal processors in VLSI form has provided the necessary impetus for the ever-expanding applications of DSP in these areas. Multi-dimensional DSP techniques are being increasingly used in the processing of multi-dimensional signals such as pictures and moving pictures obtained from satellites, x-rays, and other sources. Videophone and HDTV are some examples of products that have gained from the research and development advances in the 2-D and 3-D DSP area. The overall objectives of the proposed research are to develop a variety of efficient and reliable algorithms for filtering and processing of signals (such as image, video, speech, and biomedical signals). In particular, we will concentrate over the next 5 years on the following projects.***(a) We intend to explore the use of discrete Tchiebichef transforms (DTT) in place of DCT for image compression, since the energy compaction and decorrelation properties of DTT are very similar to that of DCT and at the same time fast multiplier-less implementations are possible for DTT. Special attention would be paid to the implementation issues for DTT as well as for many of the discrete transforms and algorithms that we have proposed in the last few years.***(b) A key challenge in realizing a cognitive radio is the dynamic adaptation needed, which can be made possible by the integration of reconfigurable digital filters and filter banks in the receiver architecture. This subproject will address the design of area efficient reconfigurable filters, which will enable the design of reconfigurable filter banks with independent control over the bandwidths & center frequencies of its subbands. ***(c) We propose to develop an intelligent surveillance system with the ability to detect, categorize and recognize human action, and ask for human attention only when necessary. Such a system could be used for home and building surveillance, parking lot monitoring, etc. It can enhance the health services by determining the condition of a patient or elderly people in a remote area. ***(d) We intend to address the problem of tracking direction of arrival of multiple moving targets. This is of great interest in a variety of commercial & military applications. ***(e) Development of algorithms for biomedical applications. In particular, we intend to develop methods to address the processing of long-term EEG recordings ***The results from these projects should be beneficial to the telecommunication, medical signal processing, VLSI, image and video signal processing, and wireless sectors of the industry.***********