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Latest from Bilibili Tech

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Bilibili Tech

Oct 8, 2024 · Artificial Intelligence

ICDAR 2024 Historical Map Text Recognition Competition: DNTextSpotter Methodology and Results

The ICDAR 2024 Historical Map Text Recognition competition was won by Bilibili’s DNTextSpotter, a Transformer‑based model built on DeepSolo and ViTAE‑v2 that uses deformable self‑attention, dual‑query decoding and denoising training, combined with mixed‑vocabulary fine‑tuning, advanced loss functions and strict PDQ/PWQ/PCQ metrics to achieve state‑of‑the‑art dense, rotated, arbitrary‑shaped text detection and recognition on historical maps and real‑world multimedia.

DNTextSpotterHistorical Map OCRICDAR

0 likes · 17 min read

ICDAR 2024 Historical Map Text Recognition Competition: DNTextSpotter Methodology and Results

Bilibili Tech

Sep 27, 2024 · Backend Development

Concurrency Issues and Race Condition Mitigation in Bilibili's Content Production System

Bilibili tackled race‑condition vulnerabilities in its massive video content pipeline by replacing simple timestamp checks with optimistic locking (CAS) and rate‑limiting locks, adding version verification and observation tools that now eliminate missed reviews and improve security, scalability, and real‑time editing reliability.

BilibiliConcurrencyOptimistic Lock

0 likes · 10 min read

Concurrency Issues and Race Condition Mitigation in Bilibili's Content Production System

Bilibili Tech

Sep 24, 2024 · Backend Development

Technical Implementation of Bilibili's Game Live Streaming Interactive Features: 'Play Together' and 'Help Me Play'

Bilibili’s game live‑stream platform implements interactive features ‘Play Together’ and ‘Help Me Play’ by using Redis ZSET queues, MySQL persistence, real‑time streamer recommendation, ticket‑based purchase flows, state‑machine order handling, and comprehensive monitoring to ensure reliable, scalable viewer‑streamer gameplay collaboration.

Backend DevelopmentBilibiliMySQL

0 likes · 12 min read

Technical Implementation of Bilibili's Game Live Streaming Interactive Features: 'Play Together' and 'Help Me Play'

Bilibili Tech

Sep 20, 2024 · Frontend Development

Bilibili Front‑End Error Monitoring: Architecture, SDK, White‑Screen Detection and Data Governance

Bilibili’s front‑end team built a custom “mirror” SDK and full‑stack monitoring platform that captures JavaScript and resource errors, detects white‑screens, logs user behavior offline, routes data through Kafka‑ClickHouse pipelines to visual dashboards, and provides one‑click alerts, now serving over 1,700 projects across 85% of business lines.

Data visualizationFrontendSDK

0 likes · 33 min read

Bilibili Front‑End Error Monitoring: Architecture, SDK, White‑Screen Detection and Data Governance

Bilibili Tech

Sep 18, 2024 · Artificial Intelligence

Index-1.9B-32K: A 2% GPT-Size Model with Powerful Long-Context Capabilities

Index-1.9B-32K is a 1.9B-parameter model with a 32K token context window, achieving strong long‑text performance comparable to larger models while using only about 2% of GPT‑4’s compute, trained via long pre‑training and supervised fine‑tuning, with a trade‑off of reduced short‑context ability.

AIevaluationfine-tuning

0 likes · 12 min read

Index-1.9B-32K: A 2% GPT-Size Model with Powerful Long-Context Capabilities

Bilibili Tech

Sep 13, 2024 · Backend Development

Architectural Evolution of Bilibili Live Interaction Center

To solve duplicated functionality, legacy code, and scalability limits in Bilibili’s live‑streaming interaction services, the team created a unified Interaction Center that abstracts RTC, consolidates session, link, UI, scoring and role management, introduces a shared state machine and tracing, and evolves through phased, extensible architecture for higher performance and maintainability.

RTCReal-Time Interactionlive streaming

0 likes · 22 min read

Architectural Evolution of Bilibili Live Interaction Center

Bilibili Tech

Sep 10, 2024 · Backend Development

Design and Implementation of a Scalable Reward System for Bilibili Live Platform

The paper presents a scalable, message‑queue‑driven reward system for Bilibili Live that unifies diverse reward types and distribution scenarios through standardized APIs, layered fast/slow queues, idempotent processing, multi‑stage retries, and comprehensive monitoring to ensure low latency, no over‑issuance, and reliable delivery.

BilibiliIdempotencyMessage Queue

0 likes · 16 min read

Design and Implementation of a Scalable Reward System for Bilibili Live Platform

Bilibili Tech

Sep 6, 2024 · Artificial Intelligence

AI Empowering Software Development for Quality and Efficiency

The QECon Global Software Quality and Efficiency Conference in Shanghai on September 20‑21 will explore how AI—especially AIGC, LLMs, and large models—enhances software development, testing, and performance, featuring expert talks on multi‑device quality assurance and practical test‑shift strategies, highlighting innovative opportunities and real‑world value.

AI in software developmentAI modelsconference

0 likes · 2 min read

AI Empowering Software Development for Quality and Efficiency

Bilibili Tech

Sep 6, 2024 · Operations

Design and Implementation of a Cross‑Platform Real‑Time Troubleshooting System for Live Streaming

The team built a cross‑platform real‑time troubleshooting system for live streaming that adds critical‑business monitoring and a unified trace_id‑based tracing framework, simplifies OpenTracing, iterates reporting components, handles multi‑threading, stitches telemetry into searchable event chains, and via dashboards cut diagnosis time from two hours to five minutes, achieving a 91% fault‑resolution rate.

distributed tracinglive streamingperformance monitoring

0 likes · 15 min read

Design and Implementation of a Cross‑Platform Real‑Time Troubleshooting System for Live Streaming

Bilibili Tech

Sep 3, 2024 · Mobile Development

USB Wired Screen Casting for iOS and Android on Windows

The article details a USB‑based wired screen‑casting solution for iOS and Android on Windows, explaining how to replace wireless LAN casting with driver‑installed USB communication, using libimobiledevice and libusbK to capture, encode (H.264/AAC), package into FLV, transfer via a custom header, and restore original device drivers after use.

AndroidUSBWindows

0 likes · 22 min read

USB Wired Screen Casting for iOS and Android on Windows