Title :
Alignment by phase of vertical coefficients in SA-DCT
Author :
Acocella, Emilio Carlos ; Alcaim, Abraham
Author_Institution :
CETUC, Rio de Janeiro, Brazil
Abstract :
In this paper, we introduce a formula to align the vertical coefficients of the SA-DCT (shape-adaptive discrete cosine transform). Instead of grouping coefficients with the same index as proposed by Sikora and Makai (1995), the new method employs an alignment by phase strategy. Experimental results are given for both synthetic segments and real testing image sequences.
Keywords :
discrete cosine transforms; image sequences; transform coding; video coding; SA-DCT; phase strategy; real testing image sequences; shape-adaptive discrete cosine transform; synthetic segments; vertical transform coefficients alignment; Compaction; Decorrelation; Discrete cosine transforms; Helium; Image segmentation; Image sequences; Markov processes; Proposals; Testing; Video coding;
Journal_Title :
Signal Processing Letters, IEEE
