翻訳と辞書 Words near each other ・ Half Way Home ・ Half Way Home (album) ・ Half Way House (Chatham, Massachusetts) ・ Half Way to Heaven ・ Half Way to Hell Club ・ Half Way Tree ・ Half Way Up ・ Half Way, California ・ Half Way, West Virginia ・ Half Wild ・ Half Yellow Face ・ Half-A-Dollar-Bill ・ Half-Alive ・ Half-arch (crown) ・ Half-back line ・ Half-band filter ・ Half-birthday ・ Half-Blood Blues ・ Half-Blood Prince (disambiguation) ・ Half-Breed ・ Half-breed ・ Half-Breed (album) ・ Half-Breed (politics) ・ Half-Breed (short story) ・ Half-Breed (song) ・ Half-Breed Tract ・ Half-Breeds on Venus ・ Half-Broken Things ・ Half-carry flag ・ Half-caste Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Half-band filter ： ウィキペディア英語版 Half-band filter In digital signal processing, such as cell phones, digital receivers, television, CD & DVD players, half-band filters are widely used for their efficiency in multi-rate applications. A half-band filter is a lowpass filter that reduces the maximum bandwidth of sampled data by an approximate factor of 2 (one octave). When multiple octaves of reduction are needed, a cascade of half-band filters is common. And when the goal is downsampling, each half-band filter needs to compute only half as many output samples as input samples. It follows from the filter's definition that its transition region, or ''skirt'', can be centered at frequency  $\backslash scriptstyle\; f\_s/4,$  where  $\backslash scriptstyle\; f\_s$  is the input sample-rate. That makes it possible to design an FIR filter whose every other coefficient is zero, and whose non-zero coefficients are symmetrical about the center of the impulse response. (See Window design method)  Both of those properties can be used to improve efficiency of the implementation. ==Citations== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Half-band filter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.