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<p>Deep learning-based image compression outperforms traditional methods in coding efficiency, but its computational complexity hinders real-time deployment on embedded devices. This paper proposes a heterogeneous computing system combining GPU-accelerated inference and CPU-accelerated entropy coding via lookup tables, breaking performance bottlenecks through algorithm-hardware co-design. After GPU acceleration, entropy coding becomes the dominant bottleneck (73% of runtime). To address this, we introduce three key innovations: replacing rANS with tANS encoding, converting dynamic computations into static table lookups, reducing encoding latency; a cache-friendly tANS coding scheme for the 192-channel network outputs, minimizing access latency; an out-of-range symbol encoding method, ensuring lossless and efficient compression. Experiments demonstrate that under high compression ratios, compared with traditional rANS, tANS reduces latency by 77%, with a compression ratio loss of 12.6% while still ensuring image compression quality higher than JPEG2000.</p>

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Deep learning image compression with multi-channel tANS coding and hardware deployment

  • 期刊论文

  • 发表日期：

    2025年11月4日

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  • Yaohua Zhu,
  • Yong Zhang,
  • Ya Liu,
  • Jingyu Jiang,
  • Yanghang Zhu,
  • Mingsheng Huang

摘要

Deep learning-based image compression outperforms traditional methods in coding efficiency, but its computational complexity hinders real-time deployment on embedded devices. This paper proposes a heterogeneous computing system combining GPU-accelerated inference and CPU-accelerated entropy coding via lookup tables, breaking performance bottlenecks through algorithm-hardware co-design. After GPU acceleration, entropy coding becomes the dominant bottleneck (73% of runtime). To address this, we introduce three key innovations: replacing rANS with tANS encoding, converting dynamic computations into static table lookups, reducing encoding latency; a cache-friendly tANS coding scheme for the 192-channel network outputs, minimizing access latency; an out-of-range symbol encoding method, ensuring lossless and efficient compression. Experiments demonstrate that under high compression ratios, compared with traditional rANS, tANS reduces latency by 77%, with a compression ratio loss of 12.6% while still ensuring image compression quality higher than JPEG2000.