Binaural rendering for headphones using metadata processing

1. A method, performed by an audio signal processing device, for generating a binaural rendering of digital audio content for playback through headphones, the method comprising:

receiving an encoded signal comprising the digital audio content and rendering metadata, wherein the digital audio content comprises a plurality of audio object signals;

receiving playback control metadata comprising local setup information;

decoding the encoded signal to obtain the plurality of audio object signals; and

generating the binaural rendering of the digital audio content in response to the plurality of audio object signals, the rendering metadata, and the playback control metadata;

wherein the rendering metadata indicates, for each audio object signal, position, gain, and whether to remap the audio object signal in response to screen size information;

wherein the local setup information comprises local screen size information;

wherein, when the rendering metadata indicates, for an audio object signal, not to remap the audio object signal in response to screen size information, generating the binaural rendering of the digital audio content comprises, for the audio object signal, ignoring the local screen size information; and

wherein, when the rendering metadata indicates, for an audio object signal, to remap the audio object signal in response to screen size information, generating the binaural rendering of the digital audio content comprises, for the audio object signal, remapping the audio object signal in response to the local screen size information.

2. An audio signal processing device for generating a binaural rendering of digital audio content for playback through headphones, the audio signal processing device comprising one or more processors to:

receive an encoded signal comprising the digital audio content and rendering metadata, wherein the digital audio content comprises a plurality of audio object signals;

receive playback control metadata comprising local setup information;

decode the encoded signal to obtain the plurality of audio object signals; and

generate the binaural rendering of the digital audio content in response to the plurality of audio object signals, the rendering metadata, and the playback control metadata;

wherein the rendering metadata indicates, for each audio object signal, position, gain, and whether to remap the audio object signal in response to screen size information;

wherein the local setup information comprises local screen size information;

wherein, when the rendering metadata indicates, for an audio object signal, not to remap the audio object signal in response to screen size information, generating the binaural rendering of the digital audio content comprises, for the audio object signal, ignoring the local screen size information; and

wherein, when the rendering metadata indicates, for an audio object signal, to remap the audio object signal in response to screen size information, generating the binaural rendering of the digital audio content comprises, for the audio object signal, remapping the audio object signal in response to the local screen size information.

3. A non-transitory computer readable storage medium comprising a sequence of instructions, which, when executed by an audio signal processing device, cause the audio signal processing device to perform a method for generating a binaural rendering of digital audio content for playback through headphones, the method comprising:

receiving an encoded signal comprising the digital audio content and rendering metadata, wherein the digital audio content comprises a plurality of audio object signals;

receiving playback control metadata comprising local setup information;

decoding the encoded signal to obtain the plurality of audio object signals; and

generating the binaural rendering of the digital audio content in response to the plurality of audio object signals, the rendering metadata, and the playback control metadata;

wherein the rendering metadata indicates, for each audio object signal, position, gain, and whether to remap the audio object signal in response to screen size information;

wherein the local setup information comprises local screen size information;

wherein, when the rendering metadata indicates, for an audio object signal, not to remap the audio object signal in response to screen size information, generating the binaural rendering of the digital audio content comprises, for the audio object signal, ignoring the local screen size information; and

wherein, when the rendering metadata indicates, for an audio object signal, to remap the audio object signal in response to screen size information, generating the binaural rendering of the digital audio content comprises, for the audio object signal, remapping the audio object signal in response to the local screen size information.