Improved delta modulation algorithm for image coding

Tian-Hu Yu; Sanjit K. Mitra

doi:10.1117/12.185901

16 September 1994 Improved delta modulation algorithm for image coding

Tian-Hu Yu, Sanjit K. Mitra

Proceedings Volume 2308, Visual Communications and Image Processing '94; (1994) https://doi.org/10.1117/12.185901
Event: Visual Communications and Image Processing '94, 1994, Chicago, IL, United States

Abstract

In a delta modulation (DM) system, the difference between two consecutive pixel intensities is coded by an one-bit quantizer. The performance of a basic DM system depends only on two quantities: sampling rate and quantization step size. In order to reach low bit-rate while preserving the decoded image quality, these two quantities have to be designed carefully. The performance of the DM system can be improved by using a delayed coding scheme and/or adapting the step size. However, such a DM system becomes so complex that it loses the advantage of simplicity. In this paper, we propose a modified DM algorithm to keep the advantage of simplicity while improving the performance of the DM system. Based on the characteristics of the human visual system, we introduce a nonlinear DM scheme by adapting a relative step size, in which the Robert's pseudo-noise technique is employed to make the proposed system stable. In addition, we show that the proposed system with a 2D predictor improves the subjective quality of the decoded image.

Citation Download Citation

Tian-Hu Yu and Sanjit K. Mitra "Improved delta modulation algorithm for image coding", Proc. SPIE 2308, Visual Communications and Image Processing '94, (16 September 1994); https://doi.org/10.1117/12.185901

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