arXiv:2411.10650eess.SPcs.LG2024-11被引 7

提出渐进式学习图像压缩框架,提升无线传输的可靠性与低延迟。

Deep Learning-Based Image Compression for Wireless Communications: Impacts on Reliability,Throughput, and Latency

  • 设计渐进式压缩模型,支持部分图像在恶劣信道下即时解码。
  • 在低信噪比下,渐进超先验模型延迟降低99.9百分位,吞吐量优于Adaptive WebP。
  • 适用于对实时性与抗误码要求高的无线图像传输场景。

在无线通信中,高效图像传输需平衡可靠性、吞吐量和延迟,尤其在动态信道条件下。本文提出一种自适应的渐进式学习图像压缩(LIC)架构,针对此类环境优化。研究了两种先进学习模型:超先验模型与向量量化生成对抗网络(VQGAN)。超先验模型通过瓶颈处无损压缩实现优异压缩性能,但对比特错误敏感,需纠错或重传机制;而VQGAN解码器在无信道编码时仍具强重建能力,提升复杂传输场景下的可靠性。本文提出两者的渐进版本,支持在信道不佳时进行部分图像传输与解码。该渐进方法不仅保障图像完整性,还显著降低延迟,使部分图像可立即可用。基于瑞利衰落信道模型,在高分辨率Kodak数据集上评估显示,渐进传输框架在不同信噪比(SNR)下均提升可靠性与低延迟表现,且维持或改善吞吐量。具体而言,渐进超先验模型在所有SNR水平下均在99.9百分位等待时间指标上优于其他模型,并在低SNR场景下吞吐量超越Adaptive WebP。

原文摘要 · Abstract (English)

In wireless communications, efficient image transmission must balance reliability, throughput, and latency, especially under dynamic channel conditions. This paper presents an adaptive and progressive pipeline for learned image compression (LIC)-based architectures tailored to such environments. We investigate two state-of-the-art learning-based models: the hyperprior model and Vector Quantized Generative Adversarial Network (VQGAN). The hyperprior model achieves superior compression performance through lossless compression in the bottleneck but is susceptible to bit errors, necessitating the use of error correction or retransmission mechanisms. In contrast, the VQGAN decoder demonstrates robust image reconstruction capabilities even in the absence of channel coding, enhancing reliability in challenging transmission scenarios. We propose progressive versions of both models, enabling partial image transmission and decoding under imperfect channel conditions. This progressive approach not only maintains image integrity under poor channel conditions but also significantly reduces latency by allowing immediate partial image availability. We evaluate our pipeline using the Kodak high-resolution image dataset under a Rayleigh fading wireless channel model simulating dynamic conditions. The results indicate that the progressive transmission framework enhances reliability and latency while maintaining or improving throughput compared to non-progressive counterparts across various Signal-to-Noise Ratio (SNR) levels. Specifically, the progressive-hyperprior model consistently outperforms others in latency metrics, particularly in the 99.9th percentile waiting time-a measure indicating the maximum waiting time experienced by 99.9% of transmission instances-across all SNRs, and achieves higher throughput in low SNR scenarios. where Adaptive WebP fails.

图像压缩无线通信低延迟渐进传输

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