Hi-MD

Short description: Data storage format

Hi-MD

Front view

Media type| Magneto-optical disc
Encoding| Linear PCM
Capacity| 1 GB
Read mechanism| 780 nm semiconductor laser diode
Write mechanism| Magnetic field modulation
Developed by| Sony
Usage| Audio and data storage
Extended from| MiniDisc
MD Data
Released| January 2004
Optical discs

General

* Optical disc
* Optical disc drive
* Optical disc authoring
* Authoring software
* Recording technologies
* Recording modes
* Packet writing

Optical media types

* Compact disc (CD): CD-DA, CD-ROM]], CD-R, CD-RW, 5.1 Music Disc, Super Audio CD (SACD), Photo CD, CD Video (CDV), Video CD (Video CD|VCD]]), Super Video CD (Super Video CD|Video CD

Standards

* SFF ATAPI/MMC
* Mount Rainier (packet writing)
* Mount Fuji (layer jump recording)
* Rainbow Books
* File systems
* ISO 9660
* Joliet
* Romeo
* Rock Ridge / SUSP
* El Torito
* Apple ISO 9660 Extensions
* Universal Disk Format (UDF)
* ISO 13490

See also

* History of optical storage media
* High-definition optical disc format war

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Rear view

Hi-MD is a magneto-optical disc-based data storage format. It was a further development of the MiniDisc.[1] With its release in later 2004,[2] came the ability to use newly developed, high-capacity 1 gigabyte Hi-MD discs, in the same dimensions as MiniDisc.[2] The last recorder and player was discontinued in 2011.[3] Blank discs stopped production in September 2012.

## Contents

* 1 Overview
* 2 Marketing
* 3 See also
* 4 References

## Overview

Hi-MD Walkman MZ-NH1 with blank Hi-MD

Hi-MD has several Walkman-selectable audio recording codecs, in order of quality: PCM, Hi-SP, and Hi-LP. Hi-MD Walkmans are backward compatible with MiniDisc playback and most can record. Hi-MD can store computer files and audio data. A bus-powered Hi-MD Walkman is seen as standard USB Mass Storage device[2] with a FAT filesystem.

Since the release of Sony's music management program, SonicStage 3.4, virtually all digital rights management was removed for compatible Hi-MD machines.

In 2005, Sony released its second-generation Hi-MD devices offering native MP3 support.

In 2005, Sony announced Hi-MD Photo.[4] The Sony MZ-DH10P Walkman was released to showcase the format with a 1.3 megapixel digital camera.

In March 2006, Sony released the MZ-RH1 Hi-MD Walkman in Japan, which was later followed in other regions. With this unit, Sony enabled faster-than-real time transfers from MiniDisc to computers. Sony made tangible speed improvements to the device over previous generations of Hi-MD recorders. The result being that the transfer times to and from computer are—under certain circumstances—cut in half over previous models, but still noticeably slower than flash memory and hard drive-based portables, because of the nature of the Hi-MD magneto-optical system.

## Marketing

In 2006, Sony positioned Hi-MD as a Digital Audio Tape (DAT) alternative after discontinuing the format the year before, placing the MZ-RH1 Hi-MD Walkman under the Pro Audio section of its "Broadcast & Business Solutions Company" website, alongside its flash memory-based recorder, the PCM-D1. DAT is a high-quality digital tape format that found a niche with musicians and studios. DAT portables have commonly been used for field recording, but have gradually been replaced by solid-state and hard drive-based units like the Aaton Cantar, the Zaxcom Deva, and similar units from Fostex and Sound Devices.

Sony MZ-RH1, the last Hi-MD Walkman by Sony

The MZ-M200 Walkman is Sony's MZ-RH1 with a stereo microphone included. The MZ-RH1 was targeted to a more general customer on Sony's consumer electronics sites and comes with no microphone bundle. The microphone was included to enable Hi-MD as a field recorder, and the higher price reflects the added value of the microphone.

MD had success in Asia (particularly in Japan and Hong Kong), but North America and Europe leaned toward either flash or hard drive-based systems. For professional recording, many offer features such as professional XLR microphone inputs, among other pro-centric features. These units were typically significantly larger and heavier than a Hi-MD Walkman, often with reduced battery life and higher prices. Hi-MD and MiniDisc recorders are no longer being manufactured, but their role has been taken over by relatively inexpensive flash memory based portable field recorders such as the Edirol R-09HR and the Olympus LS-10.

## See also

* OpenMG

## References

1. ↑ "Sony Global - Press Release - "Hi-MD" Format Established". April 27, 2006. https://www.sony.net/SonyInfo/News/Press_Archive/200401/04-001E/.
2. ↑ 2.0 2.1 2.2 test.de 22 Dezember 2004, Die Rückkehr der Mini-Disc, German, retrieved 30 May 2020.
3. ↑ Nikkei.com: „Sony To Wind Up MiniDisc Walkman Shipments“, 7. Juli 2011 (archive)
4. ↑ "SONY EXPANDS Hi-MD FORMAT BY ADOPTING DIRECT MP3 PLAYBACK AND PICTURE CAPTURING CAPABILTITY". http://www.sony.com/en/SonyInfo/News/Press/200503/05-013E/index.html.

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Optical storage media

Blu-ray (2006)|

* BD-R (2006)
* BD-RE (2006)
* BD-R XL (2010)
* BD-RE XL (2010)

Professional Disc (2003)|

* PDD (2004)

DVD (1995)|

* DVD-R (1997)
* DVD-RW (1999)
* DVD+RW (2001)
* DVD+R (2002)
* DVD+R DL (2004)
* DVD-R DL (2005)

Compact disc (1982)|

* CD-R (1988)
* CD-i (1991)
* CD-RW (1997)

Discontinued|

* Microform (1870)
* Optical tape (20th century)
* Optical disc (20th century)
* LaserDisc (1978)
* WORM (1979)
* GD-ROM (1997)
* MIL-CD (1999)
* DataPlay (2002)
* UDO (2003)
* ProData (2003)
* UMD (2004)
* HD DVD (2006)

Magneto-optic Kerr effect (1877)|

* MO disc (1980s)
* MiniDisc (1992)
* Hi-MD (2004)

Optical Assist|

* Laser turntable (1986)
* Floptical (1991)
* Super DLT (1998)

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