VIDEO LOCALIZATION USING ARRAY OF MICORPHONES

• Main Author: SALIH OSMAN, YASIR
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2009
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://utpedia.utp.edu.my/4056/1/HardBound.pdf; http://utpedia.utp.edu.my/4056/

Object localization helps to improve the surveillance system and provide extra information from the camera. In this study DCS 5220 PT camera and array of microphones are used to achieve camera localization based on audio inputs, the system consists of microphones, multiplexing circuit, computer and PT camera. The results obtains clearly demonstrates that this techniques is usable for videodiscussion applications. The localization algorithm is based on comparing the amplitude level of the signals from all microphones and then selects the one with higher amplitude, strong noise presence is one of the limitations of this techniques, however the type of noise add can be clearly identified in the frequency spectrum, and for this reason signals are compared in their frequency spectrum after the noise is been trimmed off. The DCS 5220 PT camera is IP camera manufactured by Dlink, it can pan and tilt by using URL command; to utilize the camera a network is been created by using DR 300 wireless router with data rate up to 54 Mbps and can accommodate up to 4 network elements. The system is been developed for closed room localization but it can also be extended to outdoor applications by using suitable sensors and suitable cameras, in video discussions the system can be used in conferences and in parliament halls where such a system can be used as an automatic cameraman.