arXiv:2603.10188eess.IVcs.CV2026-03

提出高效图像压缩框架ARCHE,兼顾高保真与低延迟。

ARCHE: Autoregressive Residual Compression with Hyperprior and Excitation

  • 用卷积结构统一多尺度先验,不依赖循环或Transformer
  • BD-Rate比Balle模型降48%,比VVC Intra codec降5%
  • 9500万参数,单图仅222毫秒,适合实际部署

基于学习的图像压缩近年进展表明,端到端优化可显著超越传统编码器,通过联合学习紧凑的潜在表示和概率熵模型实现更优率失真效率。然而,许多现有方法以增加计算成本和降低并行性为代价。本文提出ARCHE——自回归残差压缩框架,结合超先验与激励机制,统一了分层、空间与通道级先验,在单一概率框架中捕捉潜在表示的全局与局部依赖关系;同时采用自适应特征重校准与残差精炼提升表示质量。该架构不依赖循环或Transformer组件,实现业界领先率失真效率:在Kodak数据集上,相比Balle等人的基准模型降低约48%的BD-Rate,比Minnen & Singh的通道自回归模型降低30%,比VVC Intra编码器降低5%。模型保持高效计算,含9500万参数,单图处理时间222毫秒。视觉对比显示,尤其在低比特率下纹理更清晰、色彩保真度更高,证明精准熵建模可通过高效卷积设计实现,适用于实际部署。

原文摘要 · Abstract (English)

Recent progress in learning-based image compression has demonstrated that end-to-end optimization can substantially outperform traditional codecs by jointly learning compact latent representations and probabilistic entropy models. However, many existing approaches achieve high rate-distortion efficiency at the expense of increased computational cost and limited parallelism. This paper presents ARCHE - Autoregressive Residual Compression with Hyperprior and Excitation, an end-to-end learned image compression framework that balances modeling accuracy and computational efficiency. The proposed architecture unifies hierarchical, spatial, and channel-based priors within a single probabilistic framework, capturing both global and local dependencies in the latent representation of the image, while employing adaptive feature recalibration and residual refinement to enhance latent representation quality. Without relying on recurrent or transformer-based components, ARCHE attains state-of-the-art rate-distortion efficiency: it reduces the BD-Rate by approximately 48% relative to the commonly used benchmark model of Balle et al., 30% relative to the channel-wise autoregressive model of Minnen & Singh and 5% against the VVC Intra codec on the Kodak benchmark dataset. The framework maintains computational efficiency with 95M parameters and 222ms running time per image. Visual comparisons confirm sharper textures and improved color fidelity, particularly at lower bit rates, demonstrating that accurate entropy modeling can be achieved through efficient convolutional designs suitable for practical deployment.

图像压缩卷积网络率失真优化高效编码

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