标准编号：ISO/IEC 14496-22:2015
中文名称：信息技术 音频-可视对象的编码 第22部分：开放字体格式
英文名称：Information technology — Coding of audio-visual objects — Part 22: Open Font Format
发布日期：2015-10
标准范围
This part of ISO/IEC 14496 specifies the Open Font Format (OFF) specification, the TrueType?i and Compact Font Format (CFF) outline formats, and the TrueType hinting language. Many references to both TrueType and PostScript exist throughout this document, as Open Font Format fonts combine the two technologies. NOTE This specification is based on the OpenType? ii font format specification, and is technically equivalent to that specification. Multimedia applications require a broad range of media-related standards. In addition to the typical audio and video applications, multimedia presentations include scalable 2D graphics and text supporting all languages of the world. Faithful reproduction of scalable multimedia content requires additional components including scalable font technology. The Open Font Format is an extension of the TrueType font format, adding support for PostScript font data. OFF fonts and the operating system services which support OFF fonts provide users with a simple way to install and use fonts, whether the fonts contain TrueType outlines or CFF (PostScript) outlines. The Open Font Format addresses the following goals: ? broader multi-platform support ? excellent support for international character sets ? excellent protection for font data ? smaller file sizes to make font distribution more efficient ? excellent support for advanced typographic control PostScript?iii data included in OFF fonts may be directly rasterized or converted to the TrueType outline format for rendering, depending on which rasterizers have been installed in the host operating system. But the user model is the same: OFF fonts just work. Users will not need to be aware of the type of outline data in OFF fonts. And font creators can use whichever outline format they feel provides the best set of features for their work, without worrying about limiting a font's usability.
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