Definition

HDCD (High Definition Compatible Digital)

Part of the Personal computing glossary:

HDCD (High Definition Compatible Digital) is a digital encoding and decoding process for compact disc and DVD audio recording. The HDCD process manages to encode 20 bits of audio information into a conventional CD 16-bit channel, yielding a greater dynamic range and a more true-to-life sound when decoded. HDCD was developed by Keith Johnson and Pflash Pflaumer between 1986 and 1991, and made publicly available in 1995. Johnson and Pflaumer went on to found Pacific Microsonics, which was later acquired by Microsoft. Since 1995, more than 5,000 HDCD recordings have been released and more than 175 of those have been nominated for GRAMMY awards. An article in Wired Magazine hailed HDCD technology as "the greatest single advance in digital reproduction to date."

Audio chip manufacturers including Motorola, Sanyo, and Zoran have developed HDCD chips for audio products, such as CD and DVD players and receivers. HDCD-encoded media will play on machines that don't have the chip, and HDCD-equipped machines can play traditionally recorded media. Because the decoder chips include a high-precision digital filter, HDCD-equipped players will improve audio quality for even traditionally recorded CDs and DVDs. Conversely, because of the recording process, HDCD-encoded media will also sound better than traditionally CDs and DVDs on players that don't have the HDCD chip. Nevertheless, the best audio quality is yielded by HDCD-encoded media on an HDCD-equipped player.

This was last updated in September 2005
Contributor(s): Joe Giardella and Roshan Qureshi
Posted by: Margaret Rouse

Related Terms

Definitions

  • smartphone sensor

    - A smartphone sensor is any one of a number of different types of sensing devices installed on a user's phone to gather data for various user purposes, often in conjunction with a mobile app. (WhatIs.com)

  • respawning cookie

    - A respawning cookie is a standard HTTP cookie backed up by data stored in additional files that are used to rebuild the original cookie when the user visits the originating site again. A 2009 study... (WhatIs.com)

  • Flash cookie

    - Flash cookies, also known as local shared objects (LSO), are text files stored on a user’s hard drive when a browsers requests content that's supported by Adobe Flash. (WhatIs.com)

Glossaries

  • Personal computing

    - Terms related to personal computers, including definitions about computers sold as consumer products and words and phrases about laptops, tablets and smartphones.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Dig Deeper

Ask a Question About HDCD (High Definition Compatible Digital)Powered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.