# Ultra HD Blu-ray

> optical disc storage medium

**Wikidata**: [Q19953724](https://www.wikidata.org/wiki/Q19953724)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ultra_HD_Blu-ray)  
**Source**: https://4ort.xyz/entity/ultra-hd-blu-ray

## Summary
Ultra HD Blu-ray is an optical disc storage medium based on Blu-ray Disc technology, designed specifically for ultra high definition (UHD) video content, including 4K resolution. It serves as a physical distribution format for premium home video, leveraging the Blu-ray standard while supporting higher data capacity and advanced video features.

## Key Facts
- Based on: Blu-ray Disc
- Subclass of: optical disc
- Aliases: 4K Blu-ray Disc, UHD-BD, Ultra HD Blu-ray, 超高清蓝光光碟, 4K藍光光碟
- Logo: [Available](https://commons.wikimedia.org/wiki/Special:FilePath/Ultra_HD_Blu-ray_(logo).svg)
- Image: [Sample disc back](https://commons.wikimedia.org/wiki/Special:FilePath/Back_of_a_triple_layer_Ultra_HD_Blu-Ray_Disc.png)
- Wikipedia article: "Ultra HD Blu-ray" (exists in 10 languages)
- Subreddit community: r/4kbluray
- Sitelink count: 22 (Wikipedia articles referencing this entity)
- Google Knowledge Graph ID: /g/11bc99d5s0

## FAQs
### Q: What is Ultra HD Blu-ray?
A: Ultra HD Blu-ray is an optical disc storage medium that evolved from Blu-ray Disc technology, engineered for distributing ultra high-definition video content at 4K resolution.

### Q: How does Ultra HD Blu-ray relate to regular Blu-ray?
A: It is a direct successor to Blu-ray Disc technology, utilizing the same physical form factor but enhanced with greater storage capacity to support 4K video and high dynamic range (HDR) content.

### Q: Where can I find community discussions about Ultra HD Blu-ray?
A: The subreddit [r/4kbluray](https://www.reddit.com/r/4kbluray/) serves as a dedicated community hub for enthusiasts discussing Ultra HD Blu-ray content, releases, and playback equipment.

### Q: Is Ultra HD Blu-ray documented in multiple languages?
A: Yes, its Wikipedia article is available in 10 languages, including English, German, Spanish, Chinese, and Arabic.

## Why It Matters
Ultra HD Blu-ray addresses the growing demand for premium physical media in an increasingly streaming-dominated era. It provides tangible archival solutions for 4K content where digital distribution may face bandwidth constraints or regional licensing limitations. As the successor to Blu-ray, it maintains relevance for collectors, cinephiles, and professionals requiring uncompressed high-fidelity video playback, preserving ultra high-definition content with greater capacity than its predecessor. Its existence bridges physical and digital distribution models, catering to audiences prioritizing ownership and quality over streaming convenience.

## Notable For
- Evolution from Blu-ray technology while maintaining compatibility with Blu-ray physical specifications
- Primary storage medium for 4K UHD commercial home video releases
- Dedicated subreddit community (r/4kbluray) fostering user engagement and technical discussion
- Multilingual documentation across 10 Wikipedia languages indicating global recognition
- Google Knowledge Graph inclusion as a verifiable digital entity

## Body
### Technical Specifications
- Inherits physical form factor from Blu-ray Disc (120mm diameter, 1.2mm thickness)
- Enhanced storage capacity: Supports 66GB (triple-layer), 100GB (quad-layer), and 128GB (quad-layer write-once) discs
- Designed for ultra high-definition video output, including 4K resolution (3840×2160 pixels)
- Supports high dynamic range (HDR) formats like HDR10, Dolby Vision, and HLG

### Community Presence
- Dedicated subreddit: r/4kbluray (primary user discussion platform)
- Wikimedia Commons hosts licensed images and logo files
- Wikipedia articles exist in af, ca, ckb, cs, de, en, es, fa, fi languages
- Google Knowledge Graph entity ID: /g/11bc99d5s0

### Industry Context
- Positioned as the physical medium for premium 4K home video distribution
- Maintains compatibility with Blu-ray Disc physical standards while enhancing capacity
- Sitelink count: 22 references across Wikipedia articles
- Alias "4K Blu-ray Disc" used commercially alongside technical designation "UHD-BD"