Unequal Length First-Order Linear-Phase Filter Banks for Efficient Image Coding

In this paper, we present the structure and design method for a firstorder linear-phase filter bank (FOLPFB) which has unequal filter lengths in its synthesis bank (UFLPFB). A FOLPFB is a generalized version of biorthogonal LPFBs regarding their synthesis filter lengths. Ringing artifact is the main disadvantage of image coding based on FOLPFBs. UFLPFBs can reduce the ringing artifacts as well as approximate smooth regions well.

• Type: Conference
• Year: 2007
• Where: ICIP
• Authors: Yuichi Tanaka, Masaaki Ikehara, Truong Q. Nguyen
• Keywords: Approximate Smooth Regions, ICIP 2007, Image Processing, Linear-phase Filter Bank, Synthesis Filter Lengths, Unequal Filter Lengths