System for dynamically creating and rendering audio objects

A method of decoding object-based audio, the method comprising:

• under control of a hardware processor at an audio receiver,
• receiving a playlist that includes a list of extension objects;
• receiving parametric data representing a spatially-coded version of the extension objects;
• receiving a portion of the extension objects, the portion of extension objects comprising audio data and metadata describing attributes of the audio data;
• analyzing the playlist to determine whether a first one of the extension objects has been received in the portion of extension objects;
• in response to determining that the first extension object has not been received, rendering the parametric data to output first audio;
• and
• providing the first audio to be output for playback by a speaker.

A system decoding object-based audio, the system comprising:

• a hardware processor at an audio receiver, the hardware processor programmed to implement:
• a parametric decoder that receives parametric data representing a spatially-coded version of the extension objects;
• an audio decoder that receives a portion of the extension objects, the portion of extension objects comprising audio data and metadata describing attributes of the audio data;
• an analysis component that receives a playlist comprising a list of extension objects and analyzes the playlist to determine whether a first one of the extension objects has been received in the portion of extension objects;
• and
• a crossfade component that renders the parametric data to output first audio in response to the first one of the extension objects not being received and that outputs the first audio for playback by a speaker.