Reaffirmed 2022

NATIONAL FOREWORD

This Indian Standard (Part 30) which is identical with ISO/IEC 14496-30 : 2018 ‘Information technology - Coding of audio-visual objects - Part 30: Timed text and other visual overlays in ISO base media file format’ issued by International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC) jointly was adopted by the Bureau of Indian Standards on recommendation of the Coding and Processing of Audio, Picture, Multimedia and Hypermedia Information Sectional Committee, and approval of the Electronics and Information Technology Division Council.

This Indian Standard is published in several parts. The other parts in this series are:

Part 1 Systems

Part 2 Visual

Part 3 Audio

Part 4 Conformance testing

Part 5 Reference software

Part 6 Delivery Multimedia Integration Framework (DMIF)

Part 7 Optimized reference software for coding of audio-visual objects

Part 8 Carriage of ISO/IEC 14496 contents over IP networks

Part 9 Reference hardware description

Part 10 Advanced Video Coding

Part 11 Scene description and application engine

Part 12 ISO base media file format

Part 13 Intellectual Property Management and Protection (IPMP) extensions

Part 14 MP4 file format

Part 15 Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format

Part 16 Animation Framework eXtension (AFX)

Part 17 Streaming text format

Part 18 Font compression and streaming

Part 19 Synthesized texture stream

Part 20 Lightweight Application Scene Representation (LASeR) and Simple Aggregation Format (SAF)

Part 21 MPEG-J Graphics Framework eXtensions (GFX)

Part 22 Open Font Format

Part 23 Symbolic Music Representation

Part 24 Audio and Systems Interaction

Part 25 3D Graphics Compression Model

Part 26 Audio conformance

Part 27 3D Graphics conformance

Part 28 Composite font representation

Part 29 Web video coding

Part 33 Internet Video Coding

The text of ISO/IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.