【国外标准】 Information technology - Coding of audio-visual objects - Part 18: Font compression and streaming

This standard is part of the MPEG-4 suite of International Standards. It specifies font data representation, compression and streaming, providing an efficient mechanism to embed font data in MPEG-4 encoded presentations. It also defines MPEG-4 Text profiles and levels. The (MPEG-4) series has been developed by MPEG (Motion Picture Experts Group) and defines the set of technologies for compression, encoding and delivery of complex audio-visual scenes composed of different media objects: video objects (natural or synthetic video); audio objects; still images; text and vector graphics; computer-animated images. MPEG-4 provides a standardized way to represent the content of audio-visual objects; describe the composition of these objects in compound media scenes; encode, multiplex and synchronize the data associated with the media objects transport the media presentation over different channels; interact with the audio-visual scene at the receiver's end. An essential part of almost any media presentation involves text objects that are created using specific or custom fonts.