Organisation internationale de normalisation

MPEG-4 ISO Base File Format (14496-12)

1. Topics

   1. ISO/IEC 14496-12:201X/AMD 4: Improved audio support

This amendment enhances the codec-independent support for audio in the file format, adding the ability to declare downmixing and dynamic range control of audio, and describe the loudness of the program, before or after downmix or dynamic range control. It also supports the codec-independent declaration of channel layout, and identifying the carriage of DRC coefficients both in the audio stream, and in a separate track.

2.