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Rate-adaptive streaming of 360-degree videos with head-motion-aware viewport margins

Title	Rate-adaptive streaming of 360-degree videos with head-motion-aware viewport margins
Author	Akçay, Mehmet Necmettin, Kara, Burak, Beğen, Ali Cengiz, Ahsan, S., Curcio, I. D. D., Aksu, E.
Publication Date:	2022
Publication Place	- IEEE
Subject	DASH, OMAF, Tiled media, Virtual reality
Type	Document
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	978-166549548-6
Record ID	8f11062b-7eff-4e01-85a8-1e7a921aebe4
Library Location	Computer Science
Date	2022
Sample Text	Efficient use of available bandwidth is vital when streaming 360-degree videos as users rarely have enough bandwidth for a pleasant experience. A promising solution is the combination of viewport-dependent streaming using tiled video and rate adaptation, where the goal is to spend most of the available bandwidth for the viewport tiles. However, head motions resulting in a change in the viewport tiles briefly cause low-quality rendering until the new tiles can be replaced with high-quality versions. Previously, viewport margins-fixed regions around the viewport rendered at a medium quality-were proposed to make the viewport changes less abrupt. Later on, Head-motion-aware Viewport Margins (HMAVM) were implemented to further smooth the transitions at the expense of increased bandwidth consumption. In this paper, we manage the overall bandwidth cost of HMAVMs better by first developing a set of algorithms that trade off the quality of some viewport tiles and then making the margin selection part of the rate-adaptation algorithm.
DOI	10.1109/MIPR54900.2022.00056

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Rate-adaptive streaming of 360-degree videos with head-motion-aware viewport margins

Author Akçay, Mehmet Necmettin, Kara, Burak, Beğen, Ali Cengiz, Ahsan, S., Curcio, I. D. D., Aksu, E.

Publication Date 2022

Publication Place - IEEE

Subject DASH, OMAF, Tiled media, Virtual reality

Type Document

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 978-166549548-6

Record ID 8f11062b-7eff-4e01-85a8-1e7a921aebe4

Library Location Computer Science

Date 2022

Sample Text Efficient use of available bandwidth is vital when streaming 360-degree videos as users rarely have enough bandwidth for a pleasant experience. A promising solution is the combination of viewport-dependent streaming using tiled video and rate adaptation, where the goal is to spend most of the available bandwidth for the viewport tiles. However, head motions resulting in a change in the viewport tiles briefly cause low-quality rendering until the new tiles can be replaced with high-quality versions. Previously, viewport margins-fixed regions around the viewport rendered at a medium quality-were proposed to make the viewport changes less abrupt. Later on, Head-motion-aware Viewport Margins (HMAVM) were implemented to further smooth the transitions at the expense of increased bandwidth consumption. In this paper, we manage the overall bandwidth cost of HMAVMs better by first developing a set of algorithms that trade off the quality of some viewport tiles and then making the margin selection part of the rate-adaptation algorithm.

DOI 10.1109/MIPR54900.2022.00056