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Bilibili Tech
Bilibili Tech
Apr 29, 2025 · Cloud Computing

Bilibili Live Streaming Technology for the Spring Festival Gala: Experience Enhancement and Interactive Features

Bilibili's R&D built a cloud-based broadcast console for the 2024 CCTV Spring Festival Gala, delivering 4K HDR streaming, AI SDR-to-HDR conversion, low latency, bandwidth‑aware transcoding, and a synchronized “send bullet screen” interactive feature using custom SEI timestamps for hundreds of millions of viewers.

HDRLive StreamingSEI
0 likes · 15 min read
Bilibili Live Streaming Technology for the Spring Festival Gala: Experience Enhancement and Interactive Features
Kuaishou Audio & Video Technology
Kuaishou Audio & Video Technology
Jan 21, 2025 · Fundamentals

How Kuaishou Enables Full‑Chain Dolby Vision Support for UGC

Kuaishou partners with Dolby Labs to bring full‑chain Dolby Vision to its short‑video platform, detailing the technology behind HDR, dynamic metadata, and a brightness‑adjustment solution that ensures seamless playback and optimal visual experience for user‑generated content across devices.

Dolby VisionDynamic MetadataExtended Brightness
0 likes · 10 min read
How Kuaishou Enables Full‑Chain Dolby Vision Support for UGC
Bilibili Tech
Bilibili Tech
Mar 5, 2024 · Game Development

Bilibili Color Space Conversion Engine for Video Processing

Bilibili's color space conversion engine processes user‑uploaded videos with varied color parameters into a unified format, using layered filters, precomputed optimizations, CPU and CUDA implementations, handling transformations, quantization, chroma subsampling, matrix conversion, transfer functions, gamut and tone mapping, HDR dynamic metadata, and achieving high performance for millions of users.

Color spaceGPU AccelerationHDR
0 likes · 19 min read
Bilibili Color Space Conversion Engine for Video Processing
Bilibili Tech
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
High Availability Architecture
High Availability Architecture
Apr 22, 2022 · Artificial Intelligence

BIGO RTC: High‑Quality, Low‑Cost Real‑Time Communication through Core Operators and Scene Adaptation

The article explains how BIGO RTC achieves high‑quality, low‑cost real‑time audio‑video communication by optimizing core video operators such as HEVC encoding, AI‑driven super‑resolution and HDR, and by employing scene‑adaptive techniques like device performance tuning, content‑adaptive encoding and AI‑based pre‑processing to meet diverse latency constraints.

AI AdaptationHDRHigh Quality
0 likes · 9 min read
BIGO RTC: High‑Quality, Low‑Cost Real‑Time Communication through Core Operators and Scene Adaptation
Kuaishou Audio & Video Technology
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.

HDRVMAFbenchmark
0 likes · 7 min read
How Kuaishou Achieves Superior Short‑Video Quality: A Deep Dive into 1080P, HDR & 4K Evaluations
iQIYI Technical Product Team
iQIYI Technical Product Team
Jan 29, 2021 · Cloud Computing

iQIYI Introduces CUVA HDR Standard Support and Explores the Ultra‑HD Video Industry

iQIYI becomes the first video platform to deliver content meeting the China Ultra‑High‑Definition Video Industry Alliance (CUUVA) HDR standard, enabling devices like Xiaomi 10 Pro, Huawei P30 Pro, iPhone 11 Pro and XS Max to display richer colors, higher contrast, and deeper visual depth, while fostering an open, industry‑wide ecosystem and planning future CUVA HDR live‑streaming support.

CUVAHDRStandardization
0 likes · 5 min read
iQIYI Introduces CUVA HDR Standard Support and Explores the Ultra‑HD Video Industry
Youku Technology
Youku Technology
Oct 29, 2018 · Artificial Intelligence

Improving Online Video Experience: Youku’s End‑to‑End Video Quality Enhancement Techniques

Youku enhances online video by applying intelligent post‑production contrast mapping, device‑specific HDR tone‑mapping, high‑frame‑rate restoration through frame‑rate conversion, and ROI‑aware encoding that allocates bitrate to key visual areas, complemented by audio processing, to deliver cinema‑grade quality across diverse screens.

HDRROI encodingStreaming
0 likes · 9 min read
Improving Online Video Experience: Youku’s End‑to‑End Video Quality Enhancement Techniques