Overflow-free video coders: properties and optimal control design

Jose Ignacio Ronda; Fernando Jaureguizar; Narciso N. Garcia

doi:10.1117/12.233204

27 February 1996 Overflow-free video coders: properties and optimal control design

Jose Ignacio Ronda, Fernando Jaureguizar, Narciso N. Garcia

Proceedings Volume 2727, Visual Communications and Image Processing '96; (1996) https://doi.org/10.1117/12.233204
Event: Visual Communications and Image Processing '96, 1996, Orlando, FL, United States

Abstract

The control of video coders to adapt their variable output bit-rate to the input requirements of communication channels constitutes a well known problem which attracts considerable attention from researchers in the field. The importance of the problem stems from the freedom that international standards (such as MPEG) allow in the design of the rate control algorithm, which makes it one of the main reasons for difference in quality between same-standard coders from different manufacturers. In real-time applications the main concern in controlling the coder is to ensure a buffer overflow-free operation with a limited look-ahead in the analysis of the sequence while optimizing the quality of the encoded signal. Stochastic optimal control constitutes a systematic approach to obtain the control policy which minimizes in the long- term an average cost function. Provided that a modelization of the coder as a stochastic system is possible, the application of this theory becomes a way to avoid heuristic design. Within this frame, in this paper we concentrate on the obtainment of those policies which ensure that no buffer overflow occurs (overflow-safe policies). The condition for their existence is provided along with their main properties and the definition of a stochastic optimal control problem which can be solved using standard algorithms in order to obtain optimal overflow-safe policies. Results of the application of the approach to the control of a standard coder are provided.

Citation Download Citation

Jose Ignacio Ronda, Fernando Jaureguizar, and Narciso N. Garcia "Overflow-free video coders: properties and optimal control design", Proc. SPIE 2727, Visual Communications and Image Processing '96, (27 February 1996); https://doi.org/10.1117/12.233204

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