7-608: AV1 Image File Format ( AVIF ) is an open , royalty-free image file format specification for storing images or image sequences compressed with AV1 in the HEIF container format. It competes with HEIC , which uses the same container format built upon ISOBMFF , but HEVC for compression. Version 1.0.0 of the AVIF specification was finalized in February 2019. Version 1.1.0 was finalized in April 2022. In
14-542: A number of tests by Netflix in 2020, AVIF showed better compression efficiency than JPEG as well as better detail preservation, fewer blocking artifacts and less color bleeding around hard edges in composites of natural images, text, and graphics. AVIF support is available in all the major web browsers (i.e. over 93% of all web browsers, a similar level of support as for WebP it was made to replace). The AV1 Image File Format supports: AVIF specification defines two image profiles: On 14 December 2018, Netflix published
21-487: A standards body and are fully documented and publicly available." The Enterprise Technical Reference Model (ETRM) classifies four formats as "Open Formats": Sun Microsystems defined the criteria for open formats as follows: According to The Linux Information Project , the term open format should refer to "any format that is published for anyone to read and study but which may or may not be encumbered by patents, copyrights or other restrictions on use" – as opposed to
28-448: Is licensed with an open license . For example, an open format can be implemented by both proprietary and free and open-source software , using the typical software licenses used by each. In contrast to open file formats, closed file formats are considered trade secrets. Depending on the definition, the specification of an open format may require a fee to access or, very rarely, contain other restrictions. The range of meanings
35-626: Is similar to that of the term open standard . In 2012 the UK Government created the policy Open Standards Principles, stating that the Open Standards Principles apply to every aspect of government IT and that Government technology must remain open to everyone. They have seven principles for selecting open standards for use in government, following these principals many open formats were adopted, notably Open Document Format (ODF) . The seven principles for selecting open standards for use in
42-830: The UK government are: Within the framework of Open Government Initiative , the federal government of the United States adopted the Open Government Directive , according to which: "An open format is one that is platform independent, machine readable, and made available to the public without restrictions that would impede the re-use of that information". The State of Minnesota defines the criteria for open, XML-based file formats as follows: The Commonwealth of Massachusetts "defines open formats as specifications for data file formats that are based on an underlying open standard, developed by an open community, affirmed and maintained by
49-399: The first .avif sample images. In November 2020, HDR sample images with PQ transfer function and BT.2020 color primaries were published. Open format An open file format is a file format for storing digital data , defined by an openly published specification usually maintained by a standards organization , and which can be used and implemented by anyone. An open file format
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