Multimedia Systems

Multimedia Systems

Prof. Zdenek Smékal (head)
Dr. Radim Burget (vice-head)

Vision and mission:

Research of the program is focused on sophisticated preprocessing of signals to be transmitted by the communication system, and on the digital processing of signals to be delivered to an end user (acoustic signals, static and dynamic images, interaction of the user and a communication device, assessment of emotions for call centers, etc.).

Areas of expertise:

Audio and video processing in communication network

The members of the research team have been involved in several projects that covered the following specific expertise and tasks: i) Design of algorithms for transmission and processing of audio and video signals and development of their individual parts, ii) Development of algorithms for compressing audio and video signals according to the MPEG and JPEG standards, quality measurement of compressed signals according to ITU-T P.862, P.563, etc., iii) Development of algorithms for reconstruction of noisy or damaged audio and video signals using linear and nonlinear digital filtering, adaptive filtering, spectral subtraction, etc.

Development of an interactive gestural human-machine interface

We have also experience with the development of algorithms for gender and age recognition from speech signal parameters and algorithms for automatic analysis of emotional state of a human from audio-visual data. Furthermore, special algorithms for automatic analysis of emotional content in written texts were developed in our lab as well.

Development of biometric systems

The experience in this field covers the development of algorithms for speaker recognition and verification using information extracted from the speech signal, development of algorithms for face recognition and person identification from the image signal, and development of biometric systems based on fingerprints, faces, etc.

Processing of biomedical signals

We have conducted research of algorithms for automatic diagnosis of neurological disorders, e.g. Parkinson’s disease, from speech signal parameters. Within this research the development of algorithms for automatic detection of speech defects from speech signal parameters, and for helping in practicing their removal was realized.

Development of embedded systems

We have designed  a number of embedded multimedia systems, designed and developed their particular parts. We are experienced in the development and optimization of real-time algorithms for digital signal processors with the Harvard architecture – the DSP56300, DSP56700, MC56F8300, and TMS320C5500 series.

Smart camera systems

We offer the research, development and design in the area of detection and classification of patterns in images and video sequences (face, figure, gestures, walking or other features). We also focus on the research, development and design in the area of tracking the parameters and positions of given patterns in a video sequence and in the area of recognition of a dangerous content in images and video sequences.

3D acquisition and display

We conducted research, development and design in the area of stereoscopic acquisition of a 3D scene using the latest camera equipment, editing, cutting and mixing stereoscopic records and in the area of 2D to 3D real-time conver­sion, creation and editing of accurate 3D scene models including textures, 3D scene reconstruction based on correspondences, spatial camera calibra­tion.

Room acoustics

Our team can offer the experience of room acoustics and sound quality measurement using a head-and-torso simulator and development of algorithms for auralization and room acoustics simulation. We can also develop and test the algorithms for sound source panning and distance rendering in multichannel sound systems.

Design and measurement of electroacoustic and audio devices

The experience in the electroacustic domain includes the experience with the design and realization of analog and digital interfaces for audio signal processing systems, measuring the characteristics of electroacoustic transducers, loudspeaker systems, sound reinforcement systems, etc. in an anechoic chamber, rapid testing of electroacoustic devices, evaluation of possible structural defects which manifest themselves in the acoustic characteristics of the particular device and measuring the telecom terminals, headphones, mobile phones, headsets, etc.