The 55th International Symposium ELMAR – 2013 took place on 25th -27th of September in Zadar (Croatia). ELMAR is one of the oldest European conferences focused on science topics from multimedia communications, navigation and speech, audio, image and video processing. Also three KEMT employees were not missing among conference participants and presented their contributions “Blind Steganography based on 2D Haar Transform” (Ing. Gabriel Bugár) and „Multi-classification Model for Image Staganalysis“ (Ing. Vladimír Bánoci, PhD.) in section “Image and Video Processing” and „Modification of Widely Used Feature Vectors for Real-Time Acoustic Events Detection“ (Ing. Martin Lojka, PhD.) in section „Speech and Audio Processing“. From the conference a proceeding was released whose contrubutions are indexed in Scopus database.