REPORT VILLATORO-TELLO_Idiap-RR-06-2022/IDIAP Expanded Lattice Embeddings for Spoken Document Retrieval on Informal Meetings Villatoro-Tello, Esaú Madikeri, Srikanth Motlicek, Petr Ganapathiraju, Aravind Ivanov, Alexei V. EXTERNAL http://publications.idiap.ch/attachments/reports/2022/VILLATORO-TELLO_Idiap-RR-06-2022.pdf PUBLIC Idiap-RR-06-2022 2022 Idiap April 2022 Accepted as short papaer at SIGIR 2022 In this paper, we evaluate different alternatives to process richer forms of Automatic Speech Recognition (ASR) output based on lattice expansion algorithms for Spoken Document Retrieval (SDR).