Title :
Comment on "Shape-adaptive DCT for generic coding of video"
Author :
Bi, M. ; Ong, S.H. ; Ang, Y.H.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
Contrary to one of the key conclusions of the paper by Sikora and Makai (see ibid., vol.5, no.1, p.5962, 1995), the cross-correlation of the one-dimensional shape-adaptive DCT (1-D SA-DCT) coefficients located in two columns of different sizes does not necessarily take maximum values at the same indices. The correct way to measure the cross-correlation of the SA-DCT coefficients after the first stage of the transform is presented. The idea of implementing shape-adaptive DCT and some aspects of their work could nevertheless be useful.
Keywords :
adaptive signal processing; correlation methods; discrete cosine transforms; transform coding; video coding; SA-DCT coefficients; cross-correlation; generic video coding; shape-adaptive DCT; Bismuth; Covariance matrix; Discrete cosine transforms; Equations; Image analysis; Image coding; Image segmentation; Pixel; Random variables; Size measurement;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
