Analiza i uspoređivanje video sadržaja

undergraduate thesis

• Title (english): Analysis and Comparison of Video Content
• Author: Martina Perleta
• Mentor: Daniel Hofman (mentor)
• Committee member: Daniel Hofman (predsjednik povjerenstva)
• Committee member: Josip Knezović (član povjerenstva)
• Committee member: Alen Duspara (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2019-07-12, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

U radu je prikazan način rada video kompresije. Postoje dvije vrste video kompresije: lossless i lossy. Detaljno je opisan postupak kodiranja video sadržaja koju koristi JPEG norma. Kodirati se može na dva načina: kodiranje unutar slike iz kojeg proizlaze I-slike i kodiranje između slika koje rezultira s P-slikama i/ili B-slikama. Također, opisane su razne norme za kodiranje videa. Neke od njih su: H.261, H.263, MPEG-2, H.264/AVC (MPEG-4). Najpoznatije i u širokoj upotrjebi su H.264/AVC i MPEG-2. Najveća prednost H.264/AVC nad MPEG-2 je postizanje iste kvalitete video sadržaja s od 2 do 2,5 puta manjom brzinom prijenosa (točnost određivanja vektora pomaka je puno veća). Nadalje, uspoređivanjem svih normi po istom kriteriju, ispostavilo se da je H.262 norma s najvišom brzinom prijenosa. Osim toga, opisani su razni algoritmi za procjenu pokreta. Na samom kraju opisana je i analizirana metoda kojom su se tražile sličnosti između dva videa pomoću vektora pomaka.

Abstract (english)

This paper describes the way video compression works. There are two types of video compression: lossless and lossy. The process of encoding video content using the JPEG standard is described in detail. Video content can be encoded in two ways: intra-frame coding which produces I-images and inter-frame coding which produces P-images and/or B-images. Also, various video coding standards are described. Some of them are: H.261, H.263, MPEG-2, H.264/AVC (MPEG-4). The most popular and widely used are H.264/AVC and MPEG-2. The biggest advantage of H.264/AVC over MPEG-2 is achievement of the same video quality with 2 to 2.5 times lower bit-rate (the accuracy of motion estimation is higher). Furthermore, by comparing all the norms by the same criterion, it turned out that the standard with the highest bit-rate is H.262. In addition, various motion estimation algorithms are described. At the very end, an analysis and description is shown of a method which uses motion vectors to find similarities between two videos.

• Keywords: video kompresija; kodiranje; norme za video kompresiju; vektor pomaka; uspoređivanje video sadržaja; procjena pokreta; makroblok
• Keywords (english): video compression; encoding; video compression standards; motion vector; comparison of video content; motion estimation; macroblock
• Language: croatian
• URN:NBN: urn:nbn:hr:168:857158
• Study programme: Title: Computing; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-01-07 21:15:18