Guest Editors: Seokhwan Kim Amazon Alexa AI, USA seokhwk@amazon.com Hannes Schulz Microsoft Research Montreal, Canada Hannes.Schulz@microsoft.com Chulaka Gunasekara IBM Research AI, USA Chulaka.Gunasekara@ibm.com Chiori Hori Mitsubishi Electric Research Laboratories (MERL), USA chori@merl.com Abhinav Rastogi Google Research, USA abhirast@google.com Luis Fernando D'Haro Universidad Politécnica de Madrid (UPM), Spain luisfernando.dharo@upm.es www.signalprocessingsociety.org 13 OCTOBER 2020http://www.signalprocessingsociety.org