The Information Theoretical Significance of Spatial and Temporal Masking in Video Signals

Bernd Girod

doi:10.1117/12.952716

15 August 1989 The Information Theoretical Significance of Spatial and Temporal Masking in Video Signals

Bernd Girod

Proceedings Volume 1077, Human Vision, Visual Processing, and Digital Display; (1989) https://doi.org/10.1117/12.952716
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

We discuss the significance of masking effects for source coding of video signals without visible impairments. A new nonlinear spatiotemporal model of human threshold vision is proposed. Linearization yields the space-time-varying w-model. The model predicts both spatial and temporal masking effects accurately. Maximum bit-rate savings by irrelevancy reduction according to the w-model are evaluated for natural test pictures on the basis of the Shannon Lower Bound of rate distortion theory. Maximum bit-rate savings due to masking are below 0.5 bit/sample in the average. Typically 1/3 of the masking gain is due to spatial masking, the rest is due to the presence of dark and bright areas in the picture, where the visibility of noise is reduced. Gains due to temporal masking are significant only in the first 100 ms after a scene cut.

Citation Download Citation

Bernd Girod "The Information Theoretical Significance of Spatial and Temporal Masking in Video Signals", Proc. SPIE 1077, Human Vision, Visual Processing, and Digital Display, (15 August 1989); https://doi.org/10.1117/12.952716

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