(Wydawnictwa AGH, 2008) Dąbrowska-Boruch, Agnieszka; Wiatr, Kazimierz
The compression method applied in MPEG-2 standard is a combination of different standards, namely JPEG and H.261. There is possible to use similar compression techniques how in case of the JPEG standard, because the video signal is a sequence of still pictures. Paper presents implementation results of video signal processing path compatible with ISO/IEC 13818 standard specification in XC2VP100(-6)FF1704 Xilinx chip.
(Wydawnictwa AGH, 2006) Dąbrowska-Boruch, Agnieszka; Wiatr, Kazimierz
Motion estimation is a process calculating the Shift between the macroblock of the current picture and the most similar macroblocks from the corresponding pictures. Motion estimation is an important element of those compression algorithms that deal with sequences of pictures. Examples of such algorithms are H.26x and MPEG. In the article basic issues and the main algorithms of motion estimation have been discussed. Additionally paper presents modification of Efficient Three-Step Search algorithm.
(Wydawnictwa AGH, 2005) Dąbrowska-Boruch, Agnieszka; Wiatr, Kazimierz
The Quantization is one of the basic method of a lossy compression. Moreover the quantization is used in standard algorithms of compression of still image (JPEG) and video compression algorithms (MPEG, H.26x). In case of compression's images algorithms the quantization is executed on coefficients received from the two-dimensional discrete cosine transform (2D-DCT) calculated on 8x8 pixels blocks. Paper presents basis of quantization's process in MPEG-2 standard and implementations results in FPGA chips (XCV200BG352 and XCV2P125FF1704).
(Wydawnictwa AGH, 2011) Dąbrowska-Boruch, Agnieszka; Wiatr, Kazimierz
Najnowszym standardem kompresji obrazów nieruchomych jest standard JPEG-XR. Artykuł prezentuje podstawowe informacje dotyczące transformacji FCT. Dodatkowo przedstawione zostały wprowadzone modyfikacje, jak również wyniki otrzymane z implementacji transformacji FCT w układzie V5LX110 firmy Xilinx.
