3.4 Sound source separation fails


A mixture of sounds from the microphone input cannot be separated. Upon listening to output, the sound cannot be considered as speech, and the distortion is terrible.


Confirm the following when performing sound separation using GHDSS node.

Confirm that the source localization has been successfully completed

Since the GHDSS module uses source localization results (number of sound sources) for inputs, the separation performance degrades if localization failed. Modify the network files so that the localization results are displayed and confirm whether the system localizes sounds successfully. For further information, see the recipe, Sound source localization fails.

Confirm that GHDSS separated the sounds properly

To determine whether the GHDSS has been performed properly, save a result of GHDSS using SaveWavePCM and confirm that separation was successful. If separation failed in GHDSS , see Parameter tuning of sound source separation

Confirm that post-processing was performed properly

When PostFilter or HRLE are inserted just after separation processing, separation may fail due to improper parameters. Save the post-processed sound and confirm that the post-processing was successful. If the post-processing failed, see bsec:Separation: 006]Reducing the leak noise by post processing



See Also

Sound source localization fails
Parameter tuning of sound source separation
Reducing the leak noise by post processing