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Videocodec - Videosequence Compression

By David Bařina

Abstract

This thesis deals with modern methods of a lossy still image and video compression. Wavelet transformation and SPIHT algorithm also belong to these methods. In second half of this thesis, a videocodec is implemented based on acquired knowledge. This codec uses Daubechies wavelets to analyse an image. Afterwards there is a modified SPIHT algorithm applied on gained coefficients. A lot of effort was put in order to optimize this computation. It is possible to use the created codec in Video for Windows, DirectShow and FFmpeg multimedia frameworks. At the end of this thesis, commonly used codecs are compared with newly created one

Topics: Morton scan; compression; komprese; Mortonův rozklad; FFmpeg; DWT; quadrature mirror filter; SPIHT; DirectShow; vlnka; kvadraturně zrcadlový filtr; kodek; video; wavelet; VfW; Video for Windows; wavelet transform; vlnková transformace; codec; QMF
Publisher: Vysoké učení technické v Brně. Fakulta informačních technologií
Year: 2009
OAI identifier: oai:invenio.nusl.cz:236699
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