Desktop Site

News & Events


Ms. GALAJIT, Kasorn, Human Life Design Area, received Best Paper Award in iSAI-NLP 2018.

Ms. GALAJIT, Kasorn (1st year doctoral student in Unoki Lab. of Human Life Design Area), received Best Paper Award in iSAI-NLP 2018.

The International Joint Symposium on Artificial Intelligence and Natural Language Processing (iSAI-NLP), formerly named the International Joint Symposium on Natural Language Processing (SNLP), is one of the oldest series of international conferences dedicated to natural language processing and artificial intelligence in general originating from Thailand since 1993. iSAI-NLP 2018 is the thirteenth, held at Pattaya, Thailand, 15-17 November 2018.

■Date Awarded
November 17, 2018

Speech Watermarking Technique Based on Singular Spectrum Analysis and Automatic Parameter Estimation using Differential Evolution for Tampering Detection

Kasorn Galajit, Mongkonchai Intarauksorn, Jessada Karnjana, Pakinee Aimmanee, Masashi Unoki

With the aim of detecting a tampering in a speech signal, this paper proposed a singular spectrum analysis-based watermarking scheme with automatic parameter estimation using differential evolution. At the sender side, the singular spectrum of an original speech signal is modified to embed the watermark bit, and differential evolution is used to select part of singular spectrum to be modified in order to balance between the robustness of the scheme and the sound quality of the watermarked signal. At the receive side, the watermark is extracted and compared with the original watermark for tampering detection. The experimental results show that the analysis of an extracted watermark can be used to identify the tampering in both location and the degree of the attacks.

It is a great honor to receive the best paper award of ISAI 2018. I am thankful to organizing committee to consider my research for the best paper prize. Actually, the person who really deserves credit on this is not only me but also all of my co-authors. I would like to convey my humble gratitude to my advisor, Professor Masashi Unoki, for his continuous support. Also I am grateful to Dr. Jessada Karnjana and Dr. Pakinee Aimmanee for their great guidance and encouragement. Last but not least, Mongkonchai Intarauksorn who also received the best presentation award for his presentation on this papers. The best paper award is giving me a motivation to achieve a quality research in the future.


November 30, 2018