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Guanghua Yu

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#natural language process... Preprint Sep 2026

D-Quant: Driftable Entropy Coding for KV Cache Quantization

D-Quant is proposed, a flexible KV cache quantization framework that introduces a Drift mechanism to convert entropy-coded representations of each token into fixed-size bitstreams, enabling regular memory access and parallel dequantization within attention kernels.

Yi Su, Hong Liu, Guang-Hua Yu et al. · 0 citations
Jul 2026

PIVOT: Efficient Query-Group Indexing for Token-Level Sparse Attention

PIVOT, Proxy Indexing Via One full-prefix Traversal, a training-free, drop-in replacement for the DSA indexer that shares one prefix scan across a group of nearby queries, matches the accuracy of the dense DSA indexer while accelerating it by up to 4x and reducing end-to-end latency by up to 1.6x at long context.

Hong Liu, Yuan Cheng, Lin Niu et al. · 3 citations
Preprint Aug 2026

FOCUS: FP4 Optimization via Coupled-Relaxation and Dual-Granularity Scaling

FOCUS is proposed, a post-training quantization framework with end-to-end scale learning for FP4 Optimization via Coupled-Relaxation and Dual-Granularity Scaling, which relaxes the tight coupling between quantization and dequantization scales with a learnable full-precision coefficient, enabling more effective optimiza...

Xiang-Long Yan, Hong Liu, Cheng-Zhu Bao et al. · 1 citation
Jul 2026

HunyuanOCR-1.5: Making Lightweight OCR VLMs Faster and Better

HuyuanOCR-1.5 ranks among the top-tier end-to-end OCR solutions on OmniDocBench v1.6 while achieving new performance milestones across these long-tail tasks, and proposes Agentic Data Flow, an agent-driven data construction system that transforms model weaknesses into executable data requirements and autonomously perfo...

Gengluo Li, Xingyu Wan, Shangpin Peng et al. · 7 citations · ⚡1
Jul 2026

CoSA: Accelerating Long-Context Inference via Proxy-Kernel Co-Designed Sparse Attention

CoSA is proposed, a two-stage training-free Sparse Attention under proxy-kernel CO-design, which couples a Kernel-Aware Proxy (KAP) with an Ordered-Skipping Kernel (OSK) and achieves a 4.93% attention speedup and reduces end-to-end Time-to-First-Token by 2.53% with negligible performance degradation.

Yufei Xue, Lin Niu, Hong Liu et al. · 0 citations
Jul 2026

AngelSpec: Towards Real-World High Performance Inference with Speculative Decoding

DFly is proposed, a block-diffusion framework combining a hybrid target-conditioning backbone with a predecessor-conditioned autoregressive head, improving target-feature utilization and intra-block dependency modeling while keeping generation parallel, and DFly treats verification as a shared batch-level resource.

Hong Liu, Rui Cen, Jun-Han Shi et al. · 2 citations

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