# HD DVD

> discontinued optical disc format

**Wikidata**: [Q178990](https://www.wikidata.org/wiki/Q178990)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/HD_DVD)  
**Source**: https://4ort.xyz/entity/hd-dvd

## Summary
HD DVD is a discontinued optical disc format that was developed by Toshiba and the DVD Forum as a high-definition successor to the standard DVD format. It was designed to distribute high-resolution video content through optical disc technology before being discontinued.

## Key Facts
- HD DVD was developed by Toshiba and the DVD Forum
- It is classified as a file format and is a subclass of optical disc and machine-readable medium
- HD DVD used the Advanced Access Content System for digital rights management
- The format had various aliases including High Definition DVD, HDVD, and High Density Digital Versatile Disc
- It had a Wikipedia presence in multiple languages including af, ar, ast, bg, bjn, bs, ca, cs, da, and de
- HD DVD is described as a "discontinued optical disc format" in its Wikidata entry
- It had specific identifiers including ne.se_id: hd-dvd, freebase_id: /m/02nxm3, and yle_topic_id: 18-235116
- The format was documented by the Museum of Obsolete Media

## FAQs
### Q: What is HD DVD and why was it created?
A: HD DVD is a discontinued optical disc format developed by Toshiba and the DVD Forum. It was created as a high-definition successor to the standard DVD format to support higher-resolution video and digital content distribution.

### Q: Who developed HD DVD and what organizations were involved?
A: HD DVD was developed by Toshiba in collaboration with the DVD Forum. The DVD Forum is the organization that oversees DVD standards and development.

### Q: What was the digital rights management system for HD DVD?
A: HD DVD used the Advanced Access Content System for digital rights management, according to the structured properties provided.

## Why It Matters
HD DVD represented an important step in the evolution of optical disc technology as the industry transitioned from standard definition to high-definition video formats. As a high-definition successor to DVD, it was part of the technological progression that enabled consumers to experience significantly improved video quality. Despite its eventual discontinuation, HD DVD's development contributed to the discourse around optical storage for high-definition content and highlighted the importance of content protection systems like the Advanced Access Content System in the digital media landscape.

## Notable For
- Being a high-definition optical disc format developed by Toshiba and the DVD Forum
- Its classification as both an optical disc and machine-readable medium
- The use of Advanced Access Content System for digital rights management
- Having multiple aliases in different languages including High Definition DVD, HDVD, and High Density Digital Versatile Disc
- Its presence in Wikipedia across multiple languages, indicating international recognition

## Body
### Overview
HD DVD is a discontinued optical disc format that was developed to provide high-definition digital content distribution. The format belongs to the broader category of optical discs, which are flat and usually circular discs that encode binary data primarily used for physical data distribution and long-term archival.

### Development
HD DVD was developed by Toshiba in collaboration with the DVD Forum. The format was designed as a successor to the standard DVD, offering higher capacity and quality for high-definition video content. The development process involved creating a new standard that could support the increased data requirements of HD video while maintaining compatibility with existing DVD technology where possible.

### Classification and Relationships
HD DVD is classified as a file format and serves as a subclass of both optical disc and machine-readable medium. It falls under the broader category of optical discs, which are characterized by their physical format for data storage. The format is related to other optical disc technologies but represents a specific implementation focused on high-definition content.

### Technical Specifications
The format employed digital rights management through the Advanced Access Content System. While specific technical details like capacity, data rates, and physical dimensions aren't provided in the source material, HD DVD was designed to support high-resolution video and other digital content that exceeded the capabilities of standard DVDs.

### Recognition and Documentation
HD DVD had notable recognition across various platforms:
- Wikipedia articles in multiple languages
- Wikidata entry with the description "discontinued optical disc format"
- Freebase ID: /m/02nxm3
- Oxford Reference overview ID: 20110803095926201
- Museums of Obsolete Media documentation

### Discontinuation
According to the source material, HD DVD has been discontinued, though specific dates for its market lifecycle are not provided. The format's discontinuation ended its role in the optical disc market for high-definition content distribution.

## References

1. Freebase Data Dumps. 2013
2. Quora
3. KBpedia