document: A novel genetic algorithm for the design of a signed power-of-two coefficient quadrature mirror filter lattice filter bank A novel genetic algorithm -LRB- GA -RRB- for the design of a canonical signed power-of-two -LRB- SPT -RRB- coefficient lattice structure quadrature mirror filter bank is presented . Genetic operations may render the SPT representation of a value noncanonical . A new encoding scheme is introduced to encode the SPT values . In this new scheme , the canonical property of the SPT values is preserved under genetic operations . Additionally , two new features that drastically improve the performance of our GA are introduced . -LRB- 1 -RRB- An additional level of natural selection is introduced to simulate the effect of natural selection when sperm cells compete to fertilize an ovule ; this dramatically improves the offspring survival rate . A conventional GA is analogous to intracytoplasmic sperm injection and has an extremely low offspring survival rate , resulting in very slow convergence . -LRB- 2 -RRB- The probability of mutation for each codon of a chromosome is weighted by the reciprocal of its effect . Because of these new features , the performance of our new GA outperforms conventional GAs
doc_bio_tags: O O B I O O O O O O O O B I I B I I O O B I O O O O O O O O O O O O O O O O O B I I O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O B I O O O O O O O O O O O O O B I I O O O O O O O O O O O O O O O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: genetic algorithm quadrature mirror filter lattice filter bank encoding scheme natural selection offspring survival rate
abstractive_keyphrases: signed power-of-two coefficient lattice structure qmf chromosome codon signal processing perfect reconstruction