利用无线视频应用的错误弹性的跨层共同探索

A. Djahromi, Minyoung Kim, N. Dutt, A. Eltawil, F. Kurdahi
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引用次数: 11

摘要

在本文中,我们提出了一种无线多媒体系统的跨层算法/架构协同探索,以协调子层优化器之间的交互,以提高能量/QoS/可靠性。通过利用无线多媒体系统中固有的冗余,我们在传统的、特定层的方法上产生了一个扩展的设计空间。具体来说,我们控制应用层的纠错编码器,以提供物理层(WCDMA)的架构探索意识,通过积极的电压缩放,允许新的设计点具有更低的功耗。在尽量减少能量消耗的同时,容错技术分别补偿了由于电压缩放和损耗传输引起的硬件和网络错误的影响。我们在WCDMA通信系统上对H.263视频的实验表明,协同探索扩大了可行的设计空间,使得H.263编码器的功耗比WCDMA调制解调器的功耗节省了34%,比WCDMA调制解调器的功耗节省了20%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cross-layer co-exploration of exploiting error resilience for video over wireless applications
In this paper, we propose a cross-layer algorithm/architecture co-exploration for wireless multimedia systems to coordinate interactions among sub-layer optimizers for improvements in energy/QoS/reliability. By exploiting the inherent redundancy in wireless multimedia systems, we generate an expanded design space over traditional, layer-specific approaches. Specifically, we control the error resilient encoder at the application layer to provide awareness of architectural exploration at the physical layer (WCDMA) allowing new design points with lower power consumption via aggressive voltage scaling. While trying to reduce energy consumption, the fault tolerant technique compensates the effect of the hardware and network errors due to aggressive voltage scaling and lossy transmission, respectively. Our experiments on H.263 video over WCDMA communication system demonstrate that co-exploration enlarges the feasible design space which results in significant power savings of 34% in the H.263 encoder more than 20% in the WCDMA modem.
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