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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク General Instrument SP0256 ： ウィキペディア英語版 General Instrument SP0256 GI-SP0256 refers to a family of closely related NMOS LSI chips manufactured by General Instrument in the early 1980s, able to model the human vocal tract by a software programmable digital filter, creating a digital output converted into an analog signal through an external low pass filter. The SP0256 includes 2 KB of mask ROM. The various versions of SP0256 differ primarily in the voice data programmed into their mask ROMs. == Architecture overview == The SP0256 (and its predecessor, the SP0250) implement an 12-pole, Linear Predictive Coding (aka LPC-12) all-pole Vocal Tract Model (VTM). The SP0256 generates speech with a 10 kHz sample rate. The SP0256 realizes its 12-pole filter with a series of cascaded 2-pole IIR filter sections. This is in contrast to its contemporaries, such as Texas Instruments LPC Speech Chips, which used an 8 kHz sample rate with a 10-pole model, and realized their VTM with a lattice filter. The SP0256 combines the VTM with a simple controller that loads compressed coefficient data into the VTM, either from the on-chip ROM, external speech ROMs such as the SPR-128, or in the case of the Intellivoice, an SPB640 speech data FIFO. 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「General Instrument SP0256」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.