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Main Title: Two-level sliding-window VBR control algorithm for video on demand streaming
Author(s): de-Frutos-López, Manuel
González-de-Suso, José Luis
Sanz-Rodríguez, Sergio
Peláez-Moreno, Carmen
Díaz-de-María, Fernando
Type: Article
Language Code: en
Abstract: A two-level variable bit rate (VBR) control algorithm for hierarchical video coding, specifically tailored for the new High Efficiency Video Coding (HEVC) standard, is presented here. A long-term level monitors the current bit count along a sliding window of a few seconds, comprising several intra-periods (IPs) and shifted on an IP basis. This long-term view allows the accommodation of the naturally occurring rate variations at a slow pace, avoiding the annoying sharp quality changes commonly appearing when non-sliding window approaches are used. The bit excesses or defects observed at this level are evenly delivered to a short-term level mechanism that establishes target bit budgets for a narrower sliding window covering a single IP and shifting on a frame basis. At this level, an adequate quantization parameter is estimated to comply with the designated target bit rate. Recommended test conditions as well as two few minutes long video sequences with scene cuts have been used for the assessment of the proposed VBR controller. Comparisons with a state-of-the-art rate control algorithm have produced good results in terms of quality consistency, in exchange for moderate rate-distortion performance losses.
Issue Date: 2015
Date Available: 12-Apr-2018
DDC Class: 004 Datenverarbeitung; Informatik
Subject(s): video coding
rate control
video storage
video on demand
Journal Title: Signal Processing: Image Communication
Publisher: Elsevier
Publisher Place: Amsterdam [u.a.]
Volume: 36
Publisher DOI: 10.1016/j.image.2015.05.004
Page Start: 1
Page End: 13
EISSN: 1879-2677
ISSN: 0923-5965
Appears in Collections:FG Architektur eingebetteter Systeme » Publications

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