Mini CDs, or pocket CDs, are CDs with a smaller middellijn and one third the storage capacity of a standard 120 mm disc. [ citation needed ]
Amongst the various formats are the
- Mini CD single, a petite disc. The format is mainly used for audio CD singles te certain regions (singles are sold on normal 120 mm CDs te many countries), much like the old vinyl single. An 80 mm disc can hold up to 24 minutes of music, or 210 MiB (210 ? Two 20 bytes) of gegevens. They are often referred to spil Maxi CDs te some countries.
- The low density version holds Legitimate minutes, or 155 MB.
- Other formats are 185 MB (21 mins), which has the same gegevens density spil a 650 MB full-sized CD, and 210 MB (24 mins), with the same gegevens density spil a 700 MB utter sized CD, used for “Pocket” gegevens storage. (see also miniDVD)
Ter 1997 Dean Procter of Imaginet wasgoed suggesting business card sized square CDs with total screen hi-fi stereo movie which played te quad speed CD ROMs or DVD drives with the centre well. A diversity of laser cut shapes were developed. 
When Mini CDs were very first introduced te the United States, they were originally marketed spil CD3, ter reference to their approximate size te inches, larger CDs were called CD5, despite the fact that both CD specifications are defined solely te terms of metric units. Now, they are known spil either Mini CDs or 80 mm CDs.
Most tray-loading CD devices have Two ‘circular indentation’, one sized for a regular 120 mm CD, and a smaller, deeper circular indentation for Mini CDs to gezond into, except for some Blu-ray players.
Devices that feature a spindle also support MiniCDs, spil the disc can simply be placed onto the spindle spil with a normal CD.
Some vertically aligned tray-loading devices, such spil the older pre-slimline PlayStation Two consoles when placed vertically, require an adapter for use with 80 mm CDs.
Most slot-loading CD drives are generally incompatible (the PlayStation Trio and Wii are exceptions), but adapters are available into which one can snap an 80 mm round Mini CD te order to extend the width to match that of a 120 mm CD, and thus work te many slot-loading devices.
A popular adapter proefje, Memorex 30183001, wasgoed discontinued ter 2006.
Most CD players te the late 1980s and early 1990s didn’t treat the Mini CD circular indentation and required the use of an adapter, or very careful placement of the CD ter the precies middle of the tray. Not until after the major record labels discontinued them, did the CD Players embark to have the 80 mm circular indentation spil standard.
Since the mid-1990s, all tray loading players have circular indentation for the Mini CD.
Mini CD-R, Mini CD-RW: Spil of 2007, many manufacturers offerande 80 mm CD-R and CD-RW discs for sale ter retail electronics and office supply stores. Thesis are sometimes marketed spil “Pocket CD-R/CD-RW” (Memorex) or “Mini CD-R” (TDK). Most of the wit discs available ter retail hold either 185 MB (21 minutes) or 210 MB (24 minutes) of gegevens. The mini discs, despite having less weight and plastic, are generally more expensive than total size CD-R/CD-RW discs.
Mini CD Replication Manufacturing: Custom-manufactured Mini CDs with integral gegevens are available to the retail market. There are two variations on how the finished product is created:
- Replicated to its finished size and form: Through a single-step replication process  the Mini CD is injection-molded to its finished size and form and imprinted with gegevens ter exactly the same manner spil full-size Audio CD or CDROM discs.
- Replicated and machine-cut to its finished size and form: Some CD replication companies make Mini CDs by taking full-size Audio CD or CDROM discs and machine-cutting them down to their finished size and form.
The brief lived “Piemel Rock” promotion that talent away CD singles on the underside of spuitwater lids from Regal Movie Theaters used Mini CDs.
While almost any spindle-based or tray-based CD device can utilize mini CD media, some devices have bot designed expressly to use the smaller format, usually for portability reasons.
Sony D-88 Edit
The very first shirt-pocket CD player wasgoed the Sony D-88 (ca. 1990). It only played standard PCM audio (Crimson Book) CDs. It could play 120 mm discs if a guard wasgoed moved to permit the disc to protrude from the unit.
Compaq iPaq PM-1 Mini CD MP3 Player Edit
Te 2002, Compaq suggested a klein, lightweight Mini CD player that made up for the capacity difference inbetween 120 mm and 80 mm audio CDs by using MP3 compression, resulting te 1.1x to Three.5x the capacity of a standard audio CD, depending on compression ratio.
Memorex 8081 Mini CD MP3 Player Edit
Memorex suggested a portable CD player that matched the form factor for the 80 mm CD (Proefje MPD8081). The player wasgoed marketed spil an MP3 device, and the user wasgoed encouraged to burn MP3 music files to a mini CD, and then play them ter the player, which wasgoed noticeably smaller than a standard portable CD player. The player could also play Crimson Book audio content burned onto mini CDs. It can play both CD-R and CD-RW media, spil well spil pressed mini CDs.
Sony Mavica Edit
Sony’s Mavica line of digital cameras also suggested some cameras that record directly to mini CD media. There were two models, the CD350 and the CD500, which suggested Trio.Two megapixels and Five.0 megapixels, respectively. Thesis cameras could also record MPEG movie directly to the Mini CD – a sort of precursor to mini DVD camcorders. The media size for thesis devices wasgoed quoted at 156 MB, rather than 185 MB. It is possible that thesis devices used a packet writing format which took away some available disk space for use by formatting information. A common problem for Mavica owners has bot incorrect disc size. If a disc size other than 156 MB is used, the camera will emerge to work, but gegevens loss will likely occur.
Imation RipGo Edit
The Imation RipGo! wasgoed a portable CD-R burner that wasgoed a similar form factor to that of the Memorex Mini CD player. Again, it wasgoed marketed spil an MP3 device, and it could play MP3 and WMA files burned onto Mini CD media. It wasgoed powered by an internal lithium ion battery that could power the unit for five hours of playback. The device suffered some setbacks, most notably a slow CD initialize time (the time during which the drive analyzes the contents of an MP3 CD), maximum of 4X searing speed (due to the device using USB 1.1 to connect to its host laptop), and no support for CD-RW media. Some have also reported issues using the device with 24 minute (210 MB) mini CD media, the device wasgoed shipped with 21 minute (185 MB) media and seemed unreliable when searing on the slightly higher density media.
Sony Photo Vault Edit
Sony also manufactured a mini CD searing device, designed to be “PC-free.” The device permitted the user to directly burn pics from a Memory Stick or a USB flash drive or camera to a mini CD. It wasgoed a precursor to the various portable media storage devices such spil the iPod Photo adapters and various other hard disk based photo storage units.