# CD-Text

> extension of the Red Book Compact Disc specifications standard for audio CDs

**Wikidata**: [Q1023099](https://www.wikidata.org/wiki/Q1023099)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/CD-Text)  
**Source**: https://4ort.xyz/entity/cd-text

## Summary
CD-Text is an extension of the Red Book Compact Disc specifications standard for audio CDs, enabling the storage of text metadata alongside audio content. It allows artists and labels to include information such as album titles, track names, and performer credits directly on a CD. This feature enhances user experience by displaying detailed information on compatible CD players or computer systems.

## Key Facts
- **Classification**: CD-Text is a **technical standard** and an **extension of the Red Book Compact Disc Digital Audio specifications**.
- **Parent Format**: It extends **Compact Disc Digital Audio (CDDA)**, which was introduced in **1982**.
- **Purpose**: It enables the inclusion of **text metadata** such as album title, track titles, performer names, and composer information on audio CDs.
- **Aliases**: Alternate spellings and stylings include **CD-TEXT**, **CD Text**, **Cd-Txet**, and **Compact Disc Digital Audio - TEXT**.
- **Freebase ID**: `/m/07g5fh` (per Freebase via Wikidata reference).
- **Sitelink Count**: CD-Text has **14 sitelinks** across language versions of Wikipedia.
- **Logo**: A logo for CD-Text exists and is available via Wikimedia Commons: [CD-Text (logo)](https://commons.wikimedia.org/wiki/Special:FilePath/CD-Text_(logo).svg).
- **Wikipedia Coverage**: CD-Text articles exist in multiple languages including **Catalan**, **German**, **English**, **Spanish**, **Persian**, **French**, **Italian**, **Japanese**, **Korean**, **Polish**, **Portuguese**, **Russian**, **Chinese**, and **Cantonese**.
- **Subclass Of**: CD-Text is a subclass of **Compact Disc Digital Audio**.

## FAQs

### Q: What is CD-Text used for?
A: CD-Text is used to embed **text metadata** such as album titles, track names, and performer information directly onto audio CDs. This allows compatible CD players and software to display this information during playback.

### Q: How does CD-Text relate to the Red Book standard?
A: CD-Text is an **extension** of the Red Book Compact Disc Digital Audio standard, which defines the original specifications for audio CDs. It adds support for storing textual data in a dedicated section of the disc.

### Q: What languages is CD-Text documented in?
A: CD-Text has dedicated Wikipedia articles in at least 14 languages, including **English**, **German**, **French**, **Spanish**, **Japanese**, **Chinese**, and **Persian**, among others.

### Q: What identifiers or aliases are associated with CD-Text?
A: CD-Text is also known as **CD-TEXT**, **CD Text**, **Cd-Txet**, and **Compact Disc Digital Audio - TEXT**. Its Freebase ID is `/m/07g5fh`.

### Q: Is CD-Text a standalone format?
A: No, CD-Text is not a standalone format but an **extension** of the Compact Disc Digital Audio (CDDA) standard, meaning it requires a base audio CD to function.

## Why It Matters
CD-Text matters because it enhances the functionality of standard audio CDs by allowing the inclusion of **text-based metadata** such as album and track information. This innovation improved user experience in an era when digital metadata was not yet standardized, bridging the gap between physical media and digital information. It enabled early forms of rich media interactivity on CDs, influencing later metadata standards in digital audio formats. CD-Text also played a role in the evolution of CD technology, offering a structured way to include cataloging and presentation data directly on the disc.

## Notable For
- **Extending the Red Book Standard**: CD-Text is notable for being a key **extension to the Compact Disc Digital Audio (Red Book)** standard.
- **Metadata Integration**: It was one of the first mechanisms to allow **text metadata** to be embedded directly on audio CDs.
- **Cross-Language Documentation**: CD-Text is documented in **14 language versions of Wikipedia**, indicating its global recognition.
- **Legacy Impact**: It influenced how metadata was handled in early digital audio systems and paved the way for richer media experiences on physical media.
- **Visual Identity**: It has a **dedicated logo**, indicating branding and recognition within the industry.

## Body

### Definition and Classification
CD-Text is defined as an **extension of the Red Book Compact Disc Digital Audio specifications**. It is a **technical standard** that enables the storage of **text metadata** such as album title, performer, composer, and track information on audio CDs. Structurally, it is a **subclass of Compact Disc Digital Audio** and is not a standalone format but a supplementary feature.

### History and Development
CD-Text was developed as part of the evolution of the compact disc format, building upon the **Red Book standard** established in 1982. It was introduced to enhance the user experience by allowing textual information to be stored alongside audio data. This innovation was particularly useful in the pre-digital metadata era, where such information was otherwise only available through printed inserts or databases.

### Technical Overview
CD-Text operates by storing metadata in a dedicated section of the CD subcode channels, specifically using the **R-W** subcode area. This allows compatible players to extract and display information such as:
- Album title
- Track titles
- Performer and songwriter names
- Composer and arranger credits

The format supports multiple character sets, enabling international use. It does not affect audio playback but enhances the presentation layer for users with compatible hardware or software.

### Ecosystem and Related Standards
CD-Text is part of the broader **Compact Disc Digital Audio** ecosystem and is closely related to:
- **SHM-CD**: A variant using improved materials for better audio quality.
- **Blu-spec CD**: A high-quality CD format that sometimes incorporates CD-Text.
- **CD Video**: A hybrid format combining CD audio and LaserDisc video, which may also use CD-Text for audio segments.

### Identifiers and Aliases
CD-Text is known by several names and identifiers:
- **Aliases**: CD-TEXT, CD Text, Cd-Txet, Compact Disc Digital Audio - TEXT
- **Freebase ID**: `/m/07g5fh`
- **Wikidata Description**: "extension of the Red Book Compact Disc specifications standard for audio CDs"
- **Logo**: A specific logo for CD-Text is available on Wikimedia Commons.

### Language Coverage and Global Reach
CD-Text is documented in multiple language versions of Wikipedia, including:
- **English**, **German**, **French**, **Spanish**, **Italian**, **Japanese**, **Korean**, **Chinese**, **Persian**, **Russian**, **Polish**, **Portuguese**, **Catalan**, and **Cantonese**.

This multilingual presence indicates its adoption and relevance in global markets and technical documentation.

### Community and Industry Use
CD-Text was primarily used in the **music industry** during the 1990s and early 2000s, especially in professional CD mastering and authoring workflows. It was supported by various **CD authoring software** and **hardware players**, though its adoption was not universal due to cost and complexity in implementation.

Despite declining use with the rise of digital streaming platforms, CD-Text remains a part of the **legacy infrastructure** of physical media and is still referenced in archival and mastering contexts.

## References

1. Freebase Data Dumps. 2013