Usporedba kodiranja unutar slike u HEVC i H.264/AVC videokoderima

undergraduate thesis

• Title (english): Comparison of intra coding methods in HEVC and H.264/AVC video coders
• Author: Neven Gutić
• Mentor: Sonja Grgić (mentor)
• Committee member: Sonja Grgić (predsjednik povjerenstva)
• Committee member: Emil Dumić (član povjerenstva)
• Committee member: Jelena Božek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Novi postupak za kodiranje videosignala poznat pod kraticom HEVC (High Efficiency Video Coding) unosi brojna poboljšanja u odnosu na prethodnu generaciju kodera izvedenu u skladu s normom H.264/AVC (Advanced Video Coding), jedan dio tih poboljšanja odnosi se i na predviđanje unutar slike koje se primjenjuje pri kodiranju I-slika (Intra Coded Image) gdje se slika kodira kao samostalno i neovisno o ostalim slikama u sekvenci videosignala.
U radu su objašnjene temeljne značajke HEVC i H.264/AVC postupaka kompresije te izdvojena nova rješenja uvedena u HEVC koderu u odnosu na H.264/AVC. Analizirana je metoda predviđanja elemenata slike u bloku pri H.264/AVC i HEVC kodiranju te određeni kriteriji za odabir veličine bloka čiji elementi se predviđaju. Provedeno je kodiranje ispitnih videosekvenci, kodirajući sve slike kao I-slike uporabom HEVC i H.264/AVC kodera te ispitani utjecaji promjene parametara unutarnjeg predviđanja na brzinu prijenosa, kvalitetu slike i složenost izvedbe kodera i dekodera.

Abstract (english)

A new method for video signal encoding known by its acronym HEVC (High Efficiency Video Coding) brings a number of improvements over the previous generation of coders performed in accordance with the standard H.264 / AVC (Advanced Video Coding). Some of these improvements are related to the prediction within image that are used in the encoding of the I-picture (Intra Coded Image) where the images are encoded as an autonomous and independent of the other pictures in the video sequence.
This work considers the basic features of HEVC and H.264/AVC video compression methods and explains new solutions introduced in HEVC encoder compared to H.264/AVC. Prediction methods of image elements in the block for the H.264/AVC and HEVC encoders are analyzed and criteria for the selection of the predicted block size are defined. Using intra-prediction mode in HEVC and H.264 /AVC encoders test sequences were coded. Performances of the both encoders were evaluated based on resulting picture quality and coding process complexity.

• Keywords: video; H.264/AVC; HEVC; koder; dekoder; I-slika; predviđanje; kodiranje; makroblok; kvaliteta slike
• Keywords (english): video; H.264/AVC; HEVC; encoder; decoder; I-picture; prediction; coding; macroblock; picture quality
• Language: croatian
• URN:NBN: urn:nbn:hr:168:461108
• 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: 2018-02-06 09:06:37