Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
CD+G
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
{{short description|Compact disc format used primarily for karaoke discs}} {{infobox media | logo = [[File:CDGlogo.svg|class=skin-invert|upright=0.5|frameless]] | type = [[Optical disc]] | encoding = Various | capacity = Typically up to 800 [[megabyte|MB]]{{Citation needed|date=March 2022}} (up to 80 minutes audio) | read = 780 nm [[laser diode]] | standard = [[Rainbow Books|Red Book]] | owner = [[Philips]] & [[Sony]] | use = Audio with primitive visuals | extended from = [[Compact Disc Digital Audio|CD-DA]] | extended to = [[#Improvements|CD+EG]] }} {{Optical disc authoring}} '''CD+G''' (also known as '''CD-G''', '''CD+Graphics''', and '''TV-Graphics'''<ref name="logos">{{Cite web |url=https://www.edocpublish.com/resources-2/specifications/cd-logos/ |title=CD Logos |date=February 4, 2013}}</ref>) is an extension of the [[Compact Disc Digital Audio|compact disc]] standard that enables the display of low-resolution graphics alongside audio content when played on a compatible device. This functionality is most commonly associated with [[karaoke]] systems, which use CD+G discs to display on-screen lyrics synchronized with music playback. The CD+G format was defined by [[Philips]] and [[Sony]] as an extension of the [[Rainbow Books|Red Book]] specification for audio CDs.<ref name="jbum">{{Cite web |url=https://jbum.com//cdg_revealed.html |title=CD+G Revealed |website=jbum.com}}</ref><ref name="logos" /> The first commercially released CD to utilize the CD+G format was ''[[Eat or Be Eaten (album)|Eat or Be Eaten]]'' by [[Firesign Theatre]] in 1985.<ref>{{Cite book |title=The Compact Disc Book |author1=Brewer, Bryan |author2=Key, Edd |publisher=Harcourt Brace Jovanovich |year=1987 |page=96}}</ref> A related format, [[#Improvements|CD+EG]], offers enhanced graphical capabilities but has seen little adoption in commercial releases.<ref name="jbum" /> == Design == The CD+G format takes advantage of the six [[Compact Disc subcode]] channels R through W (which are unused in standard [[Compact Disc Digital Audio]]), to provide 6 extra bits in CD+G for graphics information per 24 bytes of audio data. When a disc is read at normal speed, these six channels provide only 28.8 [[Bit rate|kbit/s]] for graphics, which is enough to provide primitive visuals but which is dwarfed by modern bitrates (for comparison see {{Section link|bit rate|Video}}).<ref name="jbum" />{{efn|The document does contain a number of errors, later discovered.}} In the CD+G system, 16-color (4-bit) [[raster graphics]] are constructed using [[tiled rendering]] with 6Γ12 [[pixel]] tiles (6 pixels wide and 12 lines high). These tiles are typically font definitions for text (such as for karaoke or info about the music). But the tiles can be used in any manner that tile rending permits, such as for fragments which combine together to represent a picture, or simply for patterns to decorate the background. These tiles are displayed in the main central 288Γ192 pixel area which is surrounded by a 1-tile thick border (for a total raster field of 300Γ216 pixels). The 16 colors are defined in a [[Palette (computing)|color table]], which can be manipulated to change the color scheme and simulate primitive animations. === Instruction set === The main [[Machine code|instructions]] for manipulating graphics are: * Memory Preset: Set the screen to a particular color. * Border Preset: Set the border of the screen to a particular color. * Tile Block (Normal): Load a 12Γ6 tile, 2 color tile and display it normally. * [[Scrolling|Scroll]] Preset: Scroll the image, filling in the new area with a color. * Scroll Copy: Scroll the image, rotating the bits back around. * Define Transparent Color: Define a specific color as being transparent. * Load Color Table (entries 0β7): Load in the lower 8 entries of the color table. * Load Color Table (entries 8β15): Load in the upper 8 entries of the color table. * Tile Block ([[Exclusive or|XOR]]): Load a 12Γ6 tile, 2 color tile and display it using the XOR method. == Improvements == [[File:CDEGlogo.svg|class=skin-invert|upright=0.5|frameless|right]] '''Compact Disc + Extended Graphics''' ('''CD+EG''', also known as '''CD+XG''' and '''Extended TV-Graphics'''<ref name="logos" />) is an enhanced version of the CD+G format. Like CD+G, it stores additional visual data in the [[subcode]] channels R to W of a standard [[Compact Disc Digital Audio|audio CD]], allowing for the display of graphics and text alongside music playback. CD+EG offers improved graphical capabilities compared to CD+G, including higher resolution and a broader color palette. However, the format saw limited commercial adoption, and few CD+EG titles were released.<ref name="cdeg">{{Cite web |url=https://extended.graphics |title=Extended Graphics |website=extended.graphics}}</ref> CD+EG supports the following display specifications: * Resolution: 288 pixels per line Γ 192 lines * Color depth: up to 256 colors == Usage == Along with dedicated karaoke machines, other consumer devices that play CD+G format CDs include the NEC [[TurboGrafx-CD]] (a CD-ROM peripheral for the [[TurboGrafx-16]]) and [[Turbo Duo]], as well as the Japan-only successor the [[PC-FX]], the [[Philips CD-i]], the [[Sega CD]], [[Sega Saturn]],<ref>{{cite magazine |author=The Watch Dog |title=Buyers Beware|magazine=[[GamePro]]|issue=113 |publisher=[[International Data Group|IDG]]|date=February 1998|page=26}}</ref> the JVC [[X'Eye]], the [[3DO Interactive Multiplayer]], the [[Amiga CD32]] and [[Commodore CDTV]], and the [[Atari Jaguar CD]] (an attachment for the [[Atari Jaguar]]). Some CD-ROM drives can also read this data. Pioneer's [[LaserActive]] player can also play CD+G discs, as long as either the PAC-S1/S-10 or PAC-N1/N10 game modules are installed. Since 2003, some standalone [[DVD player]]s have supported the CD+G format. Regular [[CD player|audio CD player]]s will output only the audio tracks as if it was a normal music CD, unless otherwise designed to read the extra data (lyrics and images).<ref>{{Cite web |url=https://www.allstarcustom.com/faq.cfm?ID=7 |title=Will CDG play on my CD player, computer or DVD player? |author=<!--Not stated--> |date=<!--Not stated--> |website=www.allstarcustom.com |publisher=All Star Karaoke |access-date=23 June 2020}}</ref> CD+G karaoke albums are still made today by several UK and US manufacturers including Sunfly, Zoom Entertainments, SBI Karaoke and Vocal Star. Although the popularity of CD sales are dwindling the format is still widely used as [[MP3+G]] downloads. ==Notable releases== Although CD+G found its market in karaoke entertainment, some music labels were keen to experiment with the format and a number of albums were released which featured graphic images, animations and text. These special edition CD+G releases are now very rare and have become collectible items as a result. Some albums released include: {{div col}} * [[Alphaville (band)|Alphaville]] β ''[[The Breathtaking Blue]]'' * [[Anita Baker]] β ''[[Rapture (Anita Baker album)|Rapture]]'' * [[Crosby, Stills & Nash]] β ''[[Live It Up (Crosby, Stills & Nash album)|Live It Up]]'' * [[Fleetwood Mac]] β ''[[Behind the Mask (album)|Behind the Mask]]'' * [[The Jimi Hendrix Experience]] β ''[[Smash Hits (The Jimi Hendrix Experience album)|Smash Hits]]'' * [[Information Society (band)|Information Society]] β ''[[Information Society (album)|Information Society]]'' * [[Chris Isaak]] β ''[[Silvertone (album)|Silvertone]]'' * [[Laura Branigan]] β ''[[Laura Branigan (album)|Laura Branigan]]'' * [[Little Feat]] β ''[[Representing the Mambo]]'' * [[Lou Reed]] β ''[[New York (album)|New York]]'' * [[Simply Red]] β ''[[Picture Book (Simply Red album)|Picture Book]]'' * [[Donna Summer]] β ''[[Another Place and Time]]'' * [[Talking Heads]] β ''[[Naked (Talking Heads album)|Naked]]'' {{div col end}} [[Daiichi Kosho]] is a former karaoke music manufacturer and their high-quality edit-a-vision range of 99 CD+Gs is still highly sought after by karaoke presenters today. CD+G karaoke CDs are often ripped onto computer hard drives as [[MP3+G]], with the audio encoded in the standard audio format, MP3, and the graphics encoded in a RAW format. These can then be played on computers using [[VLC media player]], Karafun, or professionally by [[Disc jockey|DJ]]s and karaoke presenters using software such as Karma or Atomix [[VirtualDJ]] often in conjunction with a [[DJ controller]] manufactured by [[Pioneer Corporation|Pioneer]], [[Denon]], [[Roland Corporation|Roland]] or [[Numark Industries|Numark]]. == Notes == {{notelist}} == References == {{Reflist}} == External links == * [http://www.cdplusg.com/ The CD+G Museum and Discography, details on released titles and how to identify them] * [https://goughlui.com/2019/03/31/tech-flashback-the-cdgraphics-format-cdg/ Tech Flashback: The CD+Graphics Format (CD+G)] * [http://web.ncf.ca/aa571/cdgfaq.htm CD+G faq] {{Rainbow Books}} [[Category:Compact disc]] [[Category:Audio storage]] [[Category:Karaoke]] [[Category:Audiovisual introductions in 1985]]
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)
Pages transcluded onto the current version of this page
(
help
)
:
Template:Cite book
(
edit
)
Template:Cite magazine
(
edit
)
Template:Cite web
(
edit
)
Template:Div col
(
edit
)
Template:Div col end
(
edit
)
Template:Efn
(
edit
)
Template:Infobox media
(
edit
)
Template:Navbox
(
edit
)
Template:Notelist
(
edit
)
Template:Optical disc authoring
(
edit
)
Template:Rainbow Books
(
edit
)
Template:Reflist
(
edit
)
Template:Section link
(
edit
)
Template:Short description
(
edit
)