Share Email Print
cover

Proceedings Paper

Impact of video parameters on the DCT coefficient distribution for H.264-like video coders
Author(s): Nejat Kamaci; Ghassan Al-Regib
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We examine the impact of various encoding parameters on the distribution of the DCT coefficients for H.264-like video coders. We model the distribution of the frame DCT coefficients using the most common Laplacian and Cauchy distributions. We show that the resolution, the quantization levels and the coding type have significant impact on the accuracy of the Laplacian and Cauchy distribution based models. We also show that the transform kernel (4 ×4 vs 8 × 8) has little impact. Moreover, we show that for the video sources that have little temporal or spatial detail, such as flat regions, the distribution of the frame DCT coefficients resembles a Laplacian distribution. When the video source exhibits more detail, such as texture and edges, the distribution of the frame DCT coefficients resembles a Cauchy distribution. The correlation between the details of the video source to the two probability distributions can be used to further improve the estimation of the distribution of the frame DCT coefficients, by using a classification based approach.

Paper Details

Date Published: 15 February 2012
PDF: 10 pages
Proc. SPIE 8305, Visual Information Processing and Communication III, 830505 (15 February 2012); doi: 10.1117/12.908719
Show Author Affiliations
Nejat Kamaci, Georgia Institute of Technology (United States)
Ghassan Al-Regib, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 8305:
Visual Information Processing and Communication III
Amir Said; Onur G. Guleryuz; Robert L. Stevenson, Editor(s)

© SPIE. Terms of Use
Back to Top