信息技术. 视听对象编码. 第28部分: 复合字体表示

[中文适用范围]： ISO/IEC 14496 的第 28 部分规定了复合字体表示法，这是一种基于 XML 的文档格式，允许将各个组件字体资源组合成一个单一的虚拟字体。随着 Unicode 标准的最新进展以及代表世界上大多数语言和书写系统的新字符的添加，Unicode 字符库显著增加，并且这一过程在未来可能会继续。因此，能够在单个虚拟字体描述中组合多个支持不同语言和 Unicode 范围的独立字体，为多媒体、图形和文本内容的各种用户和创作者提供了支持世界上所有语言并利用当前计算平台上实施的现有字体渲染解决方案的机会，这些解决方案已部署在许多现有设备中。 [外文原描述]： This part of ISO/IEC 14496 specifies the Composite Font Representation, an XML-based document format that allows combining individual component font resources into a single virtual font. Recent advances in developing the Unicode Standard and the addition of new characters that represent most of the world's languages and writing systems have resulted in a significant increase of the Unicode character repertoire, and this process is likely to continue in the future. Therefore, the ability to combine a number of individual fonts supporting different languages and Unicode ranges in a single virtual font description provides the opportunity for various users and creators of multimedia, graphics and textual content to support all of the world's languages and utilize the existing font rendering solutions that are implemented in current computing platforms and deployed in many existing devices.