View Full Document

RATE-DISTORTION OPTIMIZED BITSTREAM



View the full content.
View Full Document
View Full Document

4 views

Unformatted text preview:

RATE DISTORTION OPTIMIZED BITSTREAM EXTRACTOR FOR MOTION SCALABILITY IN SCALABLE VIDEO CODING Meng Ping Kao and Truong Nguyen University of California San Diego Department of ECE http videoprocessing ucsd edu mkao ucsd edu nguyent ece ucsd edu ABSTRACT Motion scalability is designed to improve the coding efficiency of a scalable video coding framework especially in the medium to low range of decoding bit rates or spatial resolutions In order to fully benefit from the superiority of motion scalability a rate distortion optimized bitstream extractor which determines the optimal motion quality layer for each decoding scenario is required In this paper the determination process first starts off with a brute force searching algorithm Although guaranteed by the optimal performance within the search domain it has high computational complexity Two properties i e the monotonically non decreasing property and the unimodal property are then derived to accurately describe the rate distortion behavior of motion scalability Based on these two properties modified searching algorithms are proposed to reduce the complexity by a factor up to 5 Index Terms Bitstream extractor motion scalability rate distortion optimization scalable video coding 1 INTRODUCTION A typical scalable video coding SVC infrastructure as shown in Fig 1 is composed of three main building blocks i e the encoder the decoder and the bitstream extractor Compared to a conventional non scalable video codec the decoder in SVC is allowed to demand a variety of decoding specifications including different combinations of spatial temporal and quality layers It is the main task of an SVC bitstream extractor to fulfill those requests by properly truncating the scalable bitstream The designing criteria for a generic SVC bitstream extractor can be rather trivial In the SVC standard 1 for example each network abstraction layer unit NALU belongs to a certain temporal spatial and quality layer and is tagged accordingly through



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view RATE-DISTORTION OPTIMIZED BITSTREAM and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view RATE-DISTORTION OPTIMIZED BITSTREAM and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?