Competences

Software

Filter bank design and fast transforms for ISO MPEG audio coding (polyphase filterbank, FFT, DCT, DST, MDCT, IMDCT, CMDCT)
Filter designs for a wide variety of requirements (FIR, IIR, Cauer, Bessel, Chebyshev, Butterworth)
Packet-based speech signal processing (RTP, AAL)
Speech enhancement, echo cancellation
Basic algorithms of digital signal processing (FFT, Viterbi decoder, rate conversion)
Automated test environments and tooling
GUI development (C++ or web-based)

Porting floating-point algorithms to fixed-point in C and Assembler
Optimization of program memory and data memory consumption by applying optimizations in C/ASM
Reduction of processor workload by applying optimizations in C/ASM
Audio codecs: MPEG-1 Audio Layer 1-3 (MP3), MPEG-2 AAC, MPEG-4 HE-AAC
Speech codecs: ITU-T G.729/G.726/G.728, MPEG-4 HVXC

Real-time data aquisition and transmission in embedded systems: I2C, RS232, CAN
Real-time signal analysis for measurement applications: spectrum, cepstrum, order analysis
Communication between host PC systems and embedded systems