This paper introduces a new audio and speech broadband coding technique based on the combination of a pulse excitation coder and a standardized parametric coder, namely, MPEG-4 high-quality parametric coder. After presenting a series of enhancements to regular pulse excitation (RPE) to make it suitable for the modeling of broadband signals, it is shown how pulse and parametric codings complemen...

A criterion for selecting a lossy coder for still images is proposed. The “optimum” coder using the proposed criterion is selected to minimize the maximum Cherno8 information between the distribution for the original and any distribution from the optimal achievable region. The resulting coder has the property that the best achievable probability of error over the problems of hypothesis testing ...

In general, a variable rate coder can obtain the same speech quality as a fixed rate coder, while reducing the average bit rate. We have developed a variable-rate multimodal speech coder with an average bit rate of 3 kb/s for a speech activity factor of 80% and quality comparable to the GSM full rate coder. The coder has four coding modes and uses a robust classification method involving the pi...

This paper outlines a scalable to lossless coder, that is the coder presented is a scalable coder that scales from lossy quality to lossless quality. Lossless compression is achieved by concatenating a lossy, scalable transform coder with a scalable scheme for the compression of the synthesis error signal. The lossless compression results obtained are comparable with the state of the art in los...

High-quality sound processing requires hardware acceleration in order to reduce the latency of applied effect over sound. Computational creating enhanced from audio input is an important delay component and affects performance especially artists’ live or high-quality generation. Artists want apply a on their music main problem when these systems running real-time. CPU-based present flexibility,...

In this thesis, a system for automatic facial expression analysis was designed and implemented. This system includes a monocular 3d head pose tracker to handle rigid movements, feature extraction based on Gabor wavelets and gradient orientation histograms, and a SVM classifier. Further more, a database with video sequences of acted and natural facial expression was compiled and tests were done,...

In this paper we present a new approach for speech coding, which combines frequency-domain harmonic coding for periodic and \noise like" unvoiced segments of speech with a time-domain waveform coder for transition signals. This hybrid coder requires special handling of the boundary between voiced and transition segments. We outline the details of a 4 kbps hybrid coder and present subjective qua...

The feedback loop for temporal prediction of traditional implementations of an MPEG-compliant video coder requires conversion of images from the spatial domain to the transform domain and then back to the spatial domain due to the restriction of motion estimation schemes performed only in the spatial domain, severely limiting the throughput of the coder. However, it was shown that the low-compl...