Preprocessing of compressed digital video based on perceptual quality metrics

Passant V. Karunaratne; Aggelos K. Katsaggelos; Thrasyvoulos N. Pappas

doi:10.1117/12.485524

17 June 2003 Preprocessing of compressed digital video based on perceptual quality metrics

Passant V. Karunaratne, Aggelos K. Katsaggelos, Thrasyvoulos N. Pappas

Proceedings Volume 5007, Human Vision and Electronic Imaging VIII; (2003) https://doi.org/10.1117/12.485524
Event: Electronic Imaging 2003, 2003, Santa Clara, CA, United States

Abstract

The objective of pre-processing is to eliminate information of least visual significance prior to encoding, in order to achieve best overall performance of a video compression system. We formulate the pre-processing problem in an operational rate-distortion framework, with the aim of maximizing the visual quality of the compressed video, as well as the coding efficiency of the system. Rather than filtering the original video, our novel approach consists of filtering the motion compensated error signal. This offers a significant computational advantage over other pre-filtering methods without sacrificing effectiveness. The proposed method selects the parameters of a pre-filter in conjunction with the selection of the quantization scales of the encoder. We incorporate a perceptual quality metric in the optimization process, in order to maximize the visual quality of the compressed video for given rate constraints. Our approach is developed for motion-compensated block-based discrete cosine transform coders, which form the basis of several video coding standards. We use the visual quality metric that was proposed by Watson, which was developed for such coders, based on the discrete cosine transform decomposition. The effectiveness of the proposed approach is demonstrated by simulation results, carried out within the framework of MPEG-2 video compression.

Citation Download Citation

Passant V. Karunaratne, Aggelos K. Katsaggelos, and Thrasyvoulos N. Pappas "Preprocessing of compressed digital video based on perceptual quality metrics", Proc. SPIE 5007, Human Vision and Electronic Imaging VIII, (17 June 2003); https://doi.org/10.1117/12.485524

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available