Power Constrained Channel Optimized Vector Quantizers used for Bandwidth Expansion
Pål Anders Floor, Tor Audun Ramstad, Niklas Wernersson · 2007
This paper deals with algorithms for determining well performing bandwidth expanding joint source-channel coding (JSCC) systems. The JSCC systems are realized as direct source-channel mappings. The algorithms presented are "power constrained channel optimized vector quantizers" (PCCOVQ). The PCCOVQ algorithm is a modified generalized Lloyd algorithm. Theory on PCCOVQ is presented, with the emphasis on bandwidth expansion. Examples and results concerning bandwidth expansion by a factor of 2 and 3 are given.