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<title>Bitmap</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Bitmap</span></span>

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</style><div role="note" class="hatnote navigation-not-searchable">For other uses, see <a href="Bitmap_(disambiguation)" class="mw-disambig" title="Bitmap (disambiguation)">Bitmap (disambiguation)</a>.</div>

</p><p>In <a href="Computing" title="Computing">computing</a>, a <b>bitmap</b> (also called <b>raster</b>) graphic is an image formed from rows of different colored <a href="Pixel" title="Pixel">pixels</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> A <a href="GIF" title="GIF">GIF</a> is an example of a graphics image file that uses a bitmap.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

</p><p>As a noun, the term "bitmap" is very often used to refer to a particular bitmapping application: the <b>pix-map</b>, which refers to a map of <a href="Pixel" title="Pixel">pixels</a>, where each pixel may store more than two colors, thus using more than one bit per pixel. In such a case, the domain in question is the array of pixels which constitute a digital graphic output device (a screen or monitor). In some contexts, the term <i>bitmap</i> implies one bit per pixel, whereas <i>pixmap</i> is used for images with multiple bits per pixel.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>

</p><p>A bitmap is a type of <a href="Computer_storage" class="mw-redirect" title="Computer storage">memory</a> organization or <a href="Image_file_format" title="Image file format">image file format</a> used to store <a href="Digital_image" title="Digital image">digital images</a>. The term <i>bitmap</i> comes from the <a href="Computer_programming" title="Computer programming">computer programming</a> terminology, meaning just a <i>map of bits</i>, a spatially mapped <a href="Bit_array" title="Bit array">array of bits</a>. Now, along with <i>pixmap</i>, it commonly refers to the similar concept of a spatially mapped array of pixels. <a href="Raster_graphics" title="Raster graphics">Raster</a> images in general may be referred to as bitmaps or pixmaps, whether synthetic or photographic, in files or memory.

</p><p>Many <a href="Graphical_user_interface" title="Graphical user interface">graphical user interfaces</a> use bitmaps in their built-in graphics subsystems.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> For example, the <a href="Microsoft_Windows" title="Microsoft Windows">Microsoft Windows</a> and <a href="OS/2" title="OS/2">OS/2</a> platforms' <a href="Graphics_Device_Interface" title="Graphics Device Interface">GDI</a> subsystem uses the <i>Windows and OS/2 bitmap file format</i>, usually named with the <a href="File_extension" class="mw-redirect" title="File extension">file extension</a> <code>.BMP</code> (or <code>.DIB</code> for <i>device-independent bitmap</i>). Besides <a href="BMP_file_format" title="BMP file format">BMP</a>, other file formats that store literal bitmaps include <a href="ILBM" title="ILBM">InterLeaved Bitmap (ILBM)</a>, <a href="Portable_pixmap" class="mw-redirect" title="Portable pixmap">Portable Bitmap (PBM)</a>, <a href="X_BitMap" title="X BitMap">X Bitmap (XBM)</a>, and <a href="Wireless_Application_Protocol_Bitmap_Format" title="Wireless Application Protocol Bitmap Format">Wireless Application Protocol Bitmap (WBMP)</a>. Similarly, most other image file formats, such as <a href="JPEG" title="JPEG">JPEG</a>, <a href="TIFF" title="TIFF">TIFF</a>, <a href="Portable_Network_Graphics" class="mw-redirect" title="Portable Network Graphics">PNG</a>, and GIF, also store bitmap images (as opposed to <a href="Vector_graphics" title="Vector graphics">vector graphics</a>), but they are not usually referred to as <i>bitmaps</i>, since they use <a href="Image_compression" title="Image compression">compressed</a> formats internally.

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<div class="mw-heading mw-heading2"><h2 id="Pixel_storage">Pixel storage</h2></div>

<p>In typical <a href="Image_compression" title="Image compression">uncompressed</a> bitmaps, image <a href="Pixel" title="Pixel">pixels</a> are generally stored with a variable number of bits per pixel which identify its color (the <a href="Color_depth" title="Color depth">color depth</a>). Pixels of 8 bits and fewer can represent either <a href="Grayscale" title="Grayscale">grayscale</a> or <a href="Indexed_color" title="Indexed color">indexed color</a>. An <a href="Alpha_channel" class="mw-redirect" title="Alpha channel">alpha channel</a> (for <a href="Transparency_(graphic)" title="Transparency (graphic)">transparency</a>) may be stored in a separate bitmap, where it is similar to a grayscale bitmap, or in a fourth channel that, for example, converts 24-bit images to 32 bits per pixel.

</p><p>The bits representing the bitmap pixels may be <a href="Packed" class="mw-redirect" title="Packed">packed</a> or unpacked (spaced out to byte or word boundaries), depending on the format or device requirements. Depending on the color depth, a pixel in the picture will occupy at least <i>n</i>/8 bytes, where <var style="padding-right: 1px;">n</var> is the bit depth.

</p><p>For an uncompressed, packed-within-rows bitmap, such as is stored in Microsoft DIB or <a href="BMP_file_format" title="BMP file format">BMP file format</a>, or in uncompressed <a href="TIFF" title="TIFF">TIFF</a> format, a lower bound on storage size for a <i>n</i>-bit-per-pixel (2<sup>n</sup> colors) bitmap, in <a href="Byte" title="Byte">bytes</a>, can be calculated as:

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<mtext>width</mtext>

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<mtext>height</mtext>

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<annotation encoding="application/x-tex">{\displaystyle {\text{size}}={\text{width}}\cdot {\text{height}}\cdot n/8}</annotation>

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</math></span><img src="./5abf2571dac33e73bbd31de50461e8dab9fce62f.svg" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:25.95ex; height:2.843ex;" alt="{\displaystyle {\text{size}}={\text{width}}\cdot {\text{height}}\cdot n/8}" loading="lazy"></span></dd></dl>

<p>where width and height are given in pixels.

</p><p>In the formula above, header size and <a href="Palette_(computing)" title="Palette (computing)">color palette</a> size, if any, are not included. Due to effects of row padding to align each row start to a storage unit boundary, such as a <a href="Word_(computer_architecture)" title="Word (computer architecture)">word</a>, additional bytes may be needed.

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<div class="mw-heading mw-heading2"><h2 id="Device-independent_bitmaps_and_BMP_file_format">Device-independent bitmaps and BMP file format</h2></div>

<div role="note" class="hatnote navigation-not-searchable">Main article: <a href="BMP_file_format" title="BMP file format">BMP file format</a></div>

<p><a href="Microsoft" title="Microsoft">Microsoft</a> has defined a particular representation of color bitmaps of different <a href="Color_depth" title="Color depth">color depths</a>, as an aid to exchanging bitmaps between devices and applications with a variety of internal representations. They called these device-independent bitmaps "DIBs", and the file format for them is called DIB file format or <a href="BMP_file_format" title="BMP file format">BMP file format</a>. According to Microsoft support:<sup id="cite_ref-DIBhelp_6-0" class="reference"><a href="#cite_note-DIBhelp-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

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<p>A device-independent bitmap (DIB) is a format used to define device-independent bitmaps in various <a href="Color_resolution" class="mw-redirect" title="Color resolution">color resolutions</a>. The main purpose of DIBs is to allow bitmaps to be moved from one device to another (hence, the device-independent part of the name). A DIB is an external format, in contrast to a device-dependent bitmap, which appears in the system as a bitmap object (created by an application...). A DIB is normally transported in metafiles (usually using the StretchDIBits() function), BMP files, and the Clipboard (CF_DIB data format).

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<p>Here, "device independent" refers to the format, or storage arrangement, and should not be confused with <a href="Color_management" title="Color management">device-independent color</a>.

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<div class="mw-heading mw-heading3"><h3 id="Other_bitmap_file_formats">Other bitmap file formats</h3></div>

<div role="note" class="hatnote navigation-not-searchable">Main article: <a href="Image_file_formats" class="mw-redirect" title="Image file formats">Image file formats</a></div>

<p>The <a href="X_Window_System" title="X Window System">X Window System</a> uses a similar <a href="X_Bitmap" class="mw-redirect" title="X Bitmap">XBM</a> format for <a href="Black-and-white" class="mw-redirect" title="Black-and-white">black-and-white</a> images, and <a href="X_PixMap" title="X PixMap">XPM</a> (<i>pixelmap</i>) for color images. Numerous other uncompressed bitmap file formats are in use, though most not widely.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> For most purposes, standardized compressed bitmap files such as <a href="GIF" title="GIF">GIF</a>, <a href="Portable_Network_Graphics" class="mw-redirect" title="Portable Network Graphics">PNG</a>, <a href="TIFF" title="TIFF">TIFF</a>, and <a href="JPEG" title="JPEG">JPEG</a> are used. <a href="Lossless_compression" title="Lossless compression">Lossless compression</a> in particular provides the same information as a bitmap in a smaller file size.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> TIFF and JPEG have various options. JPEG is usually <a href="Lossy_compression" title="Lossy compression">lossy compression</a>. TIFF is usually either uncompressed, or lossless <a href="Lempel%E2%80%93Ziv%E2%80%93Welch" title="Lempel–Ziv–Welch">Lempel–Ziv–Welch</a> compressed like <a href="GIF" title="GIF">GIF</a>. PNG uses <a href="Deflate" title="Deflate">deflate</a> lossless compression, another <a href="Lempel-Ziv" class="mw-redirect" title="Lempel-Ziv">Lempel-Ziv</a> variant.

</p><p>There are also a variety of "raw" image files, which store raw bitmaps with no other information. Such raw files are just bitmaps in files, often with no header or size information (they are distinct from photographic <a href="Raw_image_format" title="Raw image format">raw image formats</a>, which store raw unprocessed sensor data in a structured container such as <a href="TIFF" title="TIFF">TIFF</a> format along with extensive image <a href="Metadata" title="Metadata">metadata</a>).

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<ul><li><a href="Free_space_bitmap" class="mw-redirect" title="Free space bitmap">Free space bitmap</a>, an array of bits that tracks which disk storage blocks are in-use</li>

<li><a href="Raster_graphics" title="Raster graphics">Raster graphics</a></li>

<li><a href="Raster_scan" title="Raster scan">Raster scan</a></li>

<li><a href="Rasterization" class="mw-redirect" title="Rasterization">Rasterization</a></li>

<li><a href="Sprite_(computer_graphics)" title="Sprite (computer graphics)">Sprite (computer graphics)</a></li>

<li><a href="Voxels" class="mw-redirect" title="Voxels">Voxels</a></li>

<li><a href="Vector_graphics" title="Vector graphics">Vector graphics</a></li>

<li><a href="Image_tracing" title="Image tracing">Image tracing</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://kb.iu.edu/d/afmr">"ARCHIVED: What are bitmap and vector graphics, and how are they different"</a>. University Information Technology Servivces. September 22, 2023. <a rel="nofollow" class="external text" href="https://archive.today/20240421071909/https://kb.iu.edu/d/afmr">Archived</a> from the original on April 21, 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">April 21,</span> 2024</span>.</cite></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite id="CITEREFGregersen,_Erik2022" class="citation encyclopaedia cs1">Gregersen, Erik (January 26, 2022). <a rel="nofollow" class="external text" href="https://www.britannica.com/technology/bitmap">"bitmap"</a>. <i><a href="Encyclop%C3%A6dia_Britannica" title="Encyclopædia Britannica">Encyclopædia Britannica</a></i>. <a rel="nofollow" class="external text" href="https://archive.today/20240421072042/https://www.britannica.com/technology/bitmap">Archived</a> from the original on April 21, 2024<span class="reference-accessdate">. Retrieved <span class="nowrap">April 21,</span> 2024</span>.</cite></span>

</li>

<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite id="CITEREFJames_D._Foley1995" class="citation book cs1">James D. Foley (1995). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=A4k29b0BdVMC&q=bitmap+pix+map+%22short+for+pixel+map%22&pg=PA13"><i>Computer Graphics: Principles and Practice</i></a>. Addison-Wesley Professional. p. 13. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-201-84840-6</bdi>. <q>The term bitmap, strictly speaking, applies only to 1-bit-per-pixel bilevel systems; for multiple-bit-per-pixel systems, we use the more general term pix-map (short for pixel map).</q></cite></span>

</li>

<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite id="CITEREFV.K._Pachghare2005" class="citation book cs1">V.K. Pachghare (2005). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=xIKK9RcSTR4C&q=bitmap+pixmap+one-bit+date:2004-2007&pg=PA93"><i>Comprehensive Computer Graphics: Including C++</i></a>. Laxmi Publications. p. 93. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>81-7008-185-8</bdi>.</cite></span>

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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite id="CITEREFJulian_SmartStefan_CsomorKevin_Hock2006" class="citation book cs1">Julian Smart; Stefan Csomor & Kevin Hock (2006). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=CyMsvtgnq0QC&q=bitmap+pixmap+gui&pg=PA265"><i>Cross-Platform GUI Programming with Wxwidgets</i></a>. Prentice Hall. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-13-147381-6</bdi>.</cite></span>

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<li id="cite_note-DIBhelp-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-DIBhelp_6-0">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://support.microsoft.com/kb/q81498/">"DIBs and Their Uses"</a>. <i>Microsoft Help and Support</i>. 2005-02-11.</cite></span>

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<li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.file-extensions.org/filetype/extensions/name/Bitmap+image/">"List of bitmap file types"</a>. <i>File-Extensions.org</i>.</cite></span>

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<li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><cite id="CITEREFJ._ThomasA._Jones2006" class="citation book cs1">J. Thomas; A. Jones (2006). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=xrgkojGgwDYC&q=gif+png+tiff+jpeg+common&pg=PA26"><i>Communicating Science Effectively: a practical handbook for integrating visual elements</i></a>. IWA Publishing. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>1-84339-125-2</bdi>.</cite></span>

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</ol></div></div>

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</style><div id="Multimedia_compression_and_container_formats462" style="font-size:114%;margin:0 4em"><a href="Multimedia" title="Multimedia">Multimedia</a> <a href="Data_compression" title="Data compression">compression</a> and <a href="Container_format_(computing)" class="mw-redirect" title="Container format (computing)">container</a> formats</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Video_coding_format" title="Video coding format">Video<br>compression</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a>, <br><a href="Moving_Picture_Experts_Group" title="Moving Picture Experts Group">MPEG</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<li><a href="Motion_JPEG" title="Motion JPEG">MJPEG</a></li>

<li><a href="Motion_JPEG_2000" title="Motion JPEG 2000">Motion JPEG 2000</a></li>

<li>MPEG-I

<li><a href="LCEVC" title="LCEVC">Part 2 / LCEVC</a></li></ul></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="ITU-T" title="ITU-T">ITU-T</a>, <a href="Video_Coding_Experts_Group" title="Video Coding Experts Group">VCEG</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<li>H.267 / Enhanced Compression Model</li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="Society_of_Motion_Picture_and_Television_Engineers" title="Society of Motion Picture and Television Engineers">SMPTE</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="On2_Technologies" title="On2 Technologies">TrueMotion</a> and AOMedia</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="On2_Technologies#TrueMotion_S" title="On2 Technologies">TrueMotion S</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Chinese Standard</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<li><a href="Audio_Video_Standard#Second_generation" title="Audio Video Standard">AVS2 P2</a>(GB/T 33475.2,GY/T 299.1)

<ul><li>HDR Vivid(GY/T 358)</li></ul></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Apple_Video" title="Apple Video">Apple Video</a></li>

<li><a href="Cinepak" title="Cinepak">Cinepak</a></li>

<li><a href="Daala" title="Daala">Daala</a></li>

<li><a href="Huffyuv" title="Huffyuv">Huffyuv</a></li>

<li><a href="Indeo" title="Indeo">Indeo</a></li>

<li><a href="Lagarith" title="Lagarith">Lagarith</a></li>

<li><a href="Microsoft_Video_1" title="Microsoft Video 1">Microsoft Video 1</a></li>

<li><a href="MSU_Lossless_Video_Codec" title="MSU Lossless Video Codec">MSU Lossless</a></li>

<li><a href="OMS_Video" title="OMS Video">OMS Video</a></li>

<li><a href="Pixlet" title="Pixlet">Pixlet</a></li>

<li><a href="Apple_ProRes" title="Apple ProRes">ProRes</a>

<li>QuickTime

<ul><li><a href="QuickTime_Animation" title="QuickTime Animation">Animation</a></li>

<li><a href="QuickTime_Graphics" title="QuickTime Graphics">Graphics</a></li></ul></li>

<li><a href="RealVideo" title="RealVideo">RealVideo</a></li>

<li><a href="RTVideo" title="RTVideo">RTVideo</a></li>

<li><a href="SheerVideo" title="SheerVideo">SheerVideo</a></li>

<li><a href="Smacker_video" title="Smacker video">Smacker</a></li>

<li><a href="Sorenson_Media" title="Sorenson Media">Sorenson Video/Spark</a></li>

<li><a href="Theora" title="Theora">Theora</a></li>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Audio_coding_format" title="Audio coding format">Audio<br>compression</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a>,<br> <a href="Moving_Picture_Experts_Group" title="Moving Picture Experts Group">MPEG</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II">MPEG-1 Layer II</a>

<ul><li><a href="MPEG_Multichannel" title="MPEG Multichannel">Multichannel</a></li></ul></li>

<li><a href="MPEG-1_Audio_Layer_I" title="MPEG-1 Audio Layer I">MPEG-1 Layer I</a></li>

<li><a href="MP3" title="MP3">MPEG-1 Layer III (MP3)</a></li>

<li><a href="MPEG_Surround" title="MPEG Surround">MPEG Surround</a></li>

<li><a href="MPEG-H_3D_Audio" title="MPEG-H 3D Audio">MPEG-H 3D Audio</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="ITU-T" title="ITU-T">ITU-T</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<li><a href="Speex" title="Speex">Speex</a></li>

<li><a href="Vorbis" title="Vorbis">Vorbis</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="3GPP" title="3GPP">3GPP</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="ETSI" class="mw-redirect" title="ETSI">ETSI</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="Bluetooth_Special_Interest_Group" title="Bluetooth Special Interest Group">Bluetooth SIG</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<li><a href="Audio_Video_Standard#Second_generation" title="Audio Video Standard">AVS2 P3</a>(GB/T 33475.3)

<ul><li>Audio Vivid(GY/T 363)</li></ul></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Algebraic_code-excited_linear_prediction" title="Algebraic code-excited linear prediction">ACELP</a></li>

<li><a href="Adaptive_Transform_Acoustic_Coding" class="mw-redirect" title="Adaptive Transform Acoustic Coding">ATRAC</a></li>

<li><a href="Codec_2" title="Codec 2">Codec 2</a></li>

<li><a href="Monkey's_Audio" title="Monkey's Audio">Monkey's Audio</a></li>

<li><a href="Musepack" title="Musepack">Musepack</a></li>

<li><a href="OptimFROG" title="OptimFROG">OptimFROG</a></li>

<li><a href="Qualcomm_code-excited_linear_prediction" title="Qualcomm code-excited linear prediction">QCELP</a></li>

<li><a href="Relaxed_code-excited_linear_prediction" title="Relaxed code-excited linear prediction">RCELP</a></li>

<li><a href="RealAudio" title="RealAudio">RealAudio</a></li>

<li><a href="Siren_(codec)" title="Siren (codec)">Siren</a></li>

<li><a href="SVOPC" title="SVOPC">SVOPC</a></li>

<li>TTA

<ul><li>True Audio</li></ul></li>

<li><a href="TwinVQ" title="TwinVQ">TwinVQ</a></li>

<li><a href="Vector_sum_excited_linear_prediction" title="Vector sum excited linear prediction">VSELP</a></li>

<li><a href="WavPack" title="WavPack">WavPack</a></li>

<li><a href="AptX#aptX_Low_Latency" title="AptX">aptX Low Latency</a></li>

<li><a href="AptX#aptX_Adaptive" title="AptX">aptX Adaptive</a></li>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Image_compression" title="Image compression">Image<br>compression</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a>, <a href="International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a>, <br><a href="World_Wide_Web_Consortium" title="World Wide Web Consortium">W3C</a>, <a href="ITU-T" title="ITU-T">ITU-T</a>, <a href="Joint_Photographic_Experts_Group" title="Joint Photographic Experts Group">JPEG</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Group_4_compression" title="Group 4 compression">CCITT Group 4</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Digital_container_format" class="mw-redirect" title="Digital container format">Containers</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em"><a href="International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>, <a href="International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<li><a href="ISO/IEC_base_media_file_format" class="mw-redirect" title="ISO/IEC base media file format">ISO/IEC base media file format</a></li>

<li><a href="Motion_JPEG_2000" title="Motion JPEG 2000">Motion JPEG 2000</a></li>

<li><a href="MPEG_media_transport" title="MPEG media transport">MPEG media transport</a></li></ul>

<li><a href="Matroska" title="Matroska">Matroska</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="Society_of_Motion_Picture_and_Television_Engineers" title="Society of Motion Picture and Television Engineers">SMPTE</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Others</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Smacker_video" title="Smacker video">Smacker</a></li></ul></li>

<li><a href="DivX#DivX_Media_Format_(DMF)" title="DivX">DivX Media Format</a></li>

<li><a href="Flash_Video" title="Flash Video">Flash Video</a></li>

<li><a href="Matroska" title="Matroska">Matroska</a>

<li><a href="QuickTime_File_Format" title="QuickTime File Format">QuickTime File Format</a></li>

<li><a href="RatDVD" title="RatDVD">RatDVD</a></li>

<li><a href="RealMedia" title="RealMedia">RealMedia</a></li>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Collaborations</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="NETVC" title="NETVC">NETVC</a></li>

<li><a href="Alliance_for_Open_Media" title="Alliance for Open Media">Alliance for Open Media</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Data_compression" title="Data compression">Methods</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Entropy_encoding" class="mw-redirect" title="Entropy encoding">Entropy</a>

<ul><li><a href="Arithmetic_coding" title="Arithmetic coding">Arithmetic</a></li>

<li><a href="Huffman_coding" title="Huffman coding">Huffman</a></li>

<li><a href="Modified_Huffman_coding" title="Modified Huffman coding">Modified</a></li></ul></li>

<ul><li><a href="Algebraic_code-excited_linear_prediction" title="Algebraic code-excited linear prediction">ACELP</a></li>

<li><a href="Lossless_compression" title="Lossless compression">Lossless</a></li>

<li><a href="Lossy_compression" title="Lossy compression">Lossy</a></li>

<ul><li><a href="DEFLATE" class="mw-redirect" title="DEFLATE">DEFLATE</a></li>

<li><a href="Adaptive_differential_pulse-code_modulation" title="Adaptive differential pulse-code modulation">ADPCM</a></li>

<li><a href="Transform_coding" title="Transform coding">Transforms</a>

<li><a href="Wavelet" title="Wavelet">Wavelet</a>

<ul><li><a href="Daubechies_wavelet" title="Daubechies wavelet">Daubechies</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Comparison_of_audio_coding_formats" title="Comparison of audio coding formats">Comparison of audio coding formats</a></li>

<li><a href="Comparison_of_video_codecs" title="Comparison of video codecs">Comparison of video codecs</a></li>

<li><a href="List_of_codecs" title="List of codecs">List of codecs</a></li></ul>

</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>See Compression methods for techniques and Compression software for codecs</div></td></tr></tbody></table></div>

<div class="navbox-styles"></div><div role="navigation" class="navbox authority-control" aria-label="Navbox391" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Authority control databases: National </th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/4381789-0">Germany</a></span></li></ul></div></td></tr></tbody></table></div></div><div><div class="zim-footer">

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