CIF: Small: Collaborative Research: New Approaches to the Design of Joint Source-Channel Codes

CIF：小型：协作研究：联合源通道代码设计的新方法

• 批准号: 1439465
• 负责人: Joerg Kliewer
• 金额: $ 13.29万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-02-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1439465&HistoricalAwards=false
• 关键词: CIF; Small; Collaborative; Research; New

Joint source-channel coding and decoding techniques are rapidly emerging as important design tools for the complexity- and latency-constrained transmission systems that underlie the multimedia revolution. In such scenarios these techniques have the potential to offer the same performance with less complexity or delay compared with systems which completely separate the source and channel coding functions. The investigators develop theoretical insights and practical approaches into the construction of joint source-channel codes by addressing certain classes of optimal variable-length error correcting codes and their application to networks. The insights gained by these studies facilitates new advanced coding strategies as well as a fundamental theory that guides the design of future wireless and multimedia systems. One approach to joint source-channel coding is to consider prefix condition codes which have an inherent source compression property and are in addition able to detect or correct errors resulting from noise on the communication channel. Thus, these codes typically require a smaller amount of redundancy than classical channel codes to achieve the same amount of error resilience. However, the current understanding of these codes remains rather limited which has led researchers to focus on heuristics. The investigators address these issues by tackling research problems in three interrelated directions. In particular, we (1) develop new minimum-redundancy variable-length codes with inherent error resilience properties and investigate issues related to their design and compression performance; (2) study the application of this family of codes to sensor and ad hoc networks and gain insight into their repercussions for higher communication layers; (3) investigate the construction of reversible variable-length codes including those with special error-correcting properties.

联合源通道编码和解码技术正在迅速崛起，成为多媒体革命背后复杂性和延迟受限的传输系统的重要设计工具。在这种情况下，与完全分离源编码功能和信道编码功能的系统相比，这些技术有可能以更低的复杂性或延迟提供相同的性能。研究人员通过解决某些类别的最佳可变长度纠错码及其在网络中的应用，开发了构建联合源信道码的理论见解和实用方法。这些研究获得的见解有助于新的高级编码策略以及指导未来无线和多媒体系统设计的基本理论。联合源信道编码的一种方法是考虑具有固有源压缩特性并且另外能够检测或纠正由通信信道上的噪声导致的错误的前缀条件码。因此，这些代码通常需要比经典信道代码更少量的冗余来实现相同量的错误恢复。然而，目前对这些代码的理解仍然相当有限，这导致研究人员将重点放在启发法上。研究人员通过解决三个相互关联的方向的研究问题来解决这些问题。特别是，我们（1）开发具有固有错误恢复特性的新的最小冗余可变长度代码，并研究与其设计和压缩性能相关的问题； (2) 研究该系列代码在传感器和自组织网络中的应用，并深入了解它们对更高通信层的影响； (3) 研究可逆变长码的构造，包括具有特殊纠错特性的码。