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Bilibili Tech

Sep 27, 2022 · Artificial Intelligence

Comprehensive Video Quality Evaluation Practices at Bilibili: From Subjective and Objective Metrics to HDR Assessment

Bilibili’s comprehensive video‑quality framework merges ITU‑R BT.500 subjective MOS testing with objective metrics such as PSNR, SSIM, VMAF and NIQE—including HDR10 and HLG assessment—through a full capture‑to‑encoding workflow, addressing alignment and content‑specific challenges and delivering measurable QoE and speed gains across its platforms.

HDRPSNRQoE

0 likes · 24 min read

Comprehensive Video Quality Evaluation Practices at Bilibili: From Subjective and Objective Metrics to HDR Assessment

Bilibili Tech

Jul 1, 2022 · Artificial Intelligence

Quality‑Controlled Scene‑Adaptive Video Transcoding System at Bilibili

Bilibili’s quality‑controlled scene‑adaptive transcoding system automatically splits videos into shot‑level segments, predicts optimal encoding parameters with a deep‑learning model, applies two‑pass VMAF‑targeted encoding and ROI‑aware bitrate allocation, achieving stable visual quality, 99% accuracy, and roughly 15% bitrate reduction.

ROI encodingVMAFdeep learning

0 likes · 25 min read

Quality‑Controlled Scene‑Adaptive Video Transcoding System at Bilibili

Kuaishou Audio & Video Technology

Sep 1, 2021 · Fundamentals

How Kuaishou Achieves Superior Short‑Video Quality: A Deep Dive into 1080P, HDR & 4K Evaluations

This article analyzes Kuaishou's short‑video quality advantages by detailing its production‑consumption chain, multi‑dimensional evaluation methodology, objective and subjective test results, and key metrics such as bitrate savings, VMAF gains, win and selection rates, supported by visual examples.

BenchmarkHDRVMAF

0 likes · 7 min read

How Kuaishou Achieves Superior Short‑Video Quality: A Deep Dive into 1080P, HDR & 4K Evaluations