Resource-Constrained Wireless Video Communication

该提案旨在为功率有限的设备提高无线网络上的视频通信质量，特别是实时视频。本研究的目的是研究资源受限的无线视频通信，所考虑的资源包括带宽、功率和时延。该方法是一种新的时延功率率失真理论，提供了一种量化时延、功耗、码率和视频失真之间关系的方法。在本项目中，PI将所提出的延迟-功率-速率-失真理论应用于跨层设计，在总资源约束下对视频编码器和无线通信组件进行联合优化；并开发了一个通用的测试平台，实现了所提出的算法。本提案中概述的思想和方法有望填补对资源受限无线视频通信的基本理解中的一些重要空白，并将为系统设计和算法实现提供理论基础。时延-功率比-失真理论不仅为资源受限无线视频通信的设计方法提供了重要的依据，而且为实际的无线视频通信系统提供了性能界限。提出的视频编码和跨层设计方法将填补一个关键的空白--现有的机制缺乏在总资源约束下实现最佳性能的能力。初步的研究已经引起了工业界的关注，他们对将所提出的技术应用于支持无线网络上的实时视频表现出了极大的兴趣。综合研究和教育计划将培养无线、多媒体和嵌入式系统工程师，能够应对21世纪的通信挑战。此外，国际学生联合会期望利用这个项目来激发公众和所有年龄段的学生的学习过程和发现兴趣。

The proposal aims to improve the quality of video communications, especially real-time video, over wireless networks for power limited devices. It is comprehensive in that it includes theoretical work, algorithm design, and testbed implementation.The objective of this research is to study resource-constrained wireless video communication; the resources under consideration include bandwidth, power, and delay. The proposed approach is a novel delay-Power-Rate-Distortion theory, which provides a means to quantify the relationship among delay, power consumption, bit-rate, and video distortion. In this project, the PI will apply the proposed delay-Power-Rate-Distortion theory to cross-layer design that jointly optimizes the video encoder and the wireless communication component under total resource constraints; and develop a general-purpose testbed with implementation of the proposed algorithms. The ideas and approaches outlined in this proposal are expected to fill a number of important gaps in fundamental understanding of resource-constrained wireless video communication and will provide the theoretical underpinning for system design and algorithm implementation. The delay-Power-Rate-Distortion theory is expected to not only yield important principles in design methodologies for resource-constrained wireless video communication, but also to provide performance bounds for practical wireless video communication systems. The proposed design methodologies for video coding and cross-layer design will fill a critical void -- the existing mechanisms lack the capability of achieving optimal performance under total resource constraints. The preliminary research has drawn attention from industry, which showed great interest in applying the proposed techniques to supporting real-time video over wireless networks. The integrated research and education program will train wireless, multimedia, and embedded system engineers, capable of coping with challenges of communication in the 21st century. Furthermore, the PI expects to use this project to inspire the learning processes and the discovery interests of the general public and students of all ages.