Tomasz Zernicki

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Proposed is a new technique of effective regeneration of high-frequency tonal components in an augmented MPEG-4 AAC HE decoder. The basic idea is to synthesize the tonal components using the technique called synthetic sinusoidal coding that is already adopted in the MPEG-4 codecs in another context. Here, the idea is to mix this technique with standard(More)
The new eSBR tool of MPEG-D Universal Speech and Audio Coding offers a great advantage in compression of high frequency content, however it produces audible artifacts for sounds whose pitch frequencies are strongly variable or exceeding the split frequency of eSBR. We propose an extension of the forthcoming standard by adding a high frequency sinusoidal(More)
While the vision for the Connected Car has existed for some time, realizing it is proving a challenge. In this paper, we examine candidate car-mobile integration solutions which are necessary to deliver innovative advanced telematics services. We note the key role of the mobile in delivering these new services, primarily due to the rate of growth of mobile(More)
This paper describes a new technique of efficient coding of high-frequency signal components as an alternative to Spectral Band Replication. The main idea is to reconstruct the high frequency harmonic structure trajectories by using fundamental frequencies obtained at the encoder side. Audio signal is decomposed into narrow subbands by demodulation based on(More)
This paper deals with the detection and tracking of multiple harmonic series. We consider a bootstrap approach based on prior estimation of F0 candidates and subsequent iterative adjustment of a harmonic sieve with simultaneous refinement of the F0 and inharmonicity factor. Experiments show that this simple approach is an interesting alternative to popular(More)
This paper presents a prototype of a 3D audio recording system named AudioSense which uses Wireless Acoustic Sensors to capture spatial audio. The sound is recorded in real-time by microphones embedded in each sensor device and streamed to a Processing Unit for 3D audio compression. One of the key problems in systems which stream audio data is end-to-end(More)
The paper presents a simple, yet very effective tracking technique for time-varying sinusoidal partials within sinusoidal and hybrid models of speech and audio. The issues of several existing tracking techniques are discussed in the paper. We extend the classic tracking algorithm of McAulay and Quatieri by the inclusion of frequency and amplitude skew(More)
The H.264/AVC is the most recent standard of video compression. In this paper, an original and efficient architecture of inter prediction block in an H.264/AVC decoder is presented. It is shown that the bit-serial arithmetic can be successfully used for interpolation filter implementation and the resulting architecture is fully pipelined. The inter(More)
From both technical and social viewpoints there is great value in services that require devices (and therefore people) to be co-located. The very act of co-location brings with it entirely new dynamics and collaboration; furthermore, devices in coalition can render services and provide experiences that a single device might not be able to. In this paper we(More)