MLLP-UPV and RWTH Aachen Spanish ASR Systems for the IberSpeech-RTVE 2018 Speech-to-Text Transcription Challenge. - Javier Jorge; Adria A. Martinez-Villaronga; Pavel Golik; Adrià Giménez; Joan Albert Silvestre-Cerdà; Patrick Doetsch; Vicent Andreu Císcar; Hermann Ney; Alfons Juan; Albert Sanchís (IberSPEECH, 2018)