Encoding reverberator parameters from virtual or physical scene geometry and desired reverberation characteristics and rendering using these

An apparatus comprising:

• at least one processor;
• and
• at least one non-transitory memory and computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to:
• obtain first parameters for early reflection synthesis based on a geometry of a sound scene;
• determine coefficients for at least one diffuse-to-direct ratio control filter based on one or more diffuse-to-direct ratio characteristics for the sound scene;
• obtain second parameters for late reverberation synthesis, wherein the second parameters comprise, at least, the coefficients for the at least one diffuse-to-direct ratio control filter;
• perform the early reflection synthesis based on the first parameters and at least one audio signal to produce at least one early reflection signal;
• perform the late reverberation synthesis based on the second parameters and the at least one audio signal to produce a diffuse reverberated signal;
• combine the at least one early reflection signal and the diffuse reverberated signal to produce at least one reverberated signal;
• and
• render the at least one reverberated signal.

A non-transitory computer-readable medium comprising program instructions stored thereon which, when executed with at least one processor, cause the at least one processor to:

• obtain first parameters for early reflection synthesis based on a geometry of a sound scene;
• determine coefficients for at least one diffuse-to-direct ratio control filter based on one or more diffuse-to-direct ratio characteristics for the sound scene;
• obtain second parameters for late reverberation synthesis, wherein the second parameters comprise, at least, the coefficients for the at least one diffuse-to-direct ratio control filter;
• perform the early reflection synthesis based on the first parameters and at least one audio signal to produce at least one early reflection signal;
• perform the late reverberation synthesis based on the second parameters and the at least one audio signal to produce a diffuse reverberated signal;
• combine the at least one early reflection signal and the diffuse reverberated signal to produce at least one reverberated signal;
• and
• render the at least one reverberated signal.

A method comprising:

• determining coefficients for at least one diffuse-to-direct ratio control filter based on one or more diffuse-to-direct ratio characteristics for a sound scene;
• obtaining first parameters for late reverberation synthesis, wherein the first parameters comprise, at least, the coefficients for the at least one diffuse-to-direct ratio control filter;
• performing the late reverberation synthesis based on the first parameters and at least one audio signal to produce at least one diffuse reverberated signal;
• and
• rendering the at least one diffuse reverberated signal.