dispersion n. 1.分散,散開;散布,傳播;離散。 2.【物理學(xué)】彌散,色散;【化學(xué)】分散作用;被分散物;分散相,分散體系;【醫(yī)學(xué)】(炎癥等的)消散;【統(tǒng)計學(xué)】離中趨勢。 3.〔the D-〕 (猶太人的)離散異邦。 the dispersion of heat 熱的擴散。 the dispersion of an assembly 集會的解散。 dispersion on the ground 炮彈在地面上的散布。
pulse n. 1.脈搏;有節(jié)奏的跳動;【動物;動物學(xué)】脈沖(波);脈動。 2.意向;傾向。 3.【音樂】拍子,律動。 His pulse was at a hundred. 他的脈搏(每分鐘)一百次。 a galloping pulse 急脈。 a high pulse 強脈。 a long [ slow ] pulse 緩脈。 a weak pulse 弱脈。 an action pulse (火箭)觸發(fā)脈沖。 a carry pulse 進位脈沖。 a driving pulse 起動脈沖。 feel sb.'s pulse =have one's fingers on the pulse of sb. 按某人的脈;探某人的意向。 stir sb.'s pulses 鼓動某人的情緒;使人興奮。 with quickened pulses 心跳得更快地。 vi. 脈跳動;震動;脈動。 vt. 使發(fā)生脈沖;用脈沖輸送(血等) (in out)。 n. 〔sing., pl. 〕 豆類;豆。
These are mixed - excitation , aperiodic pulses , pulse dispersion , and adaptive spectral enhancement . so the melp vocoder can produce more natural sounding speech . with a analysis to melp coding arithmetic , a speech codec scheme in software is presented in this paper 本論文在對melp編碼算法進行分析的基礎(chǔ)上,提出了用軟件實現(xiàn)語音信號編解碼的方案;然后,基于melp標(biāo)準(zhǔn),開發(fā)了仿真系統(tǒng),實現(xiàn)對語音信號的編解碼。
Melp which can work at the rate of 2 . 4kb / s has been chosen as u . s . federal standard , melp algorithm is on the basis of line prediction ( lp ) . five auxiliary characters has been introduced into melp algorithm , they are mixed excitation , aperiodic pulse , fourier magnitudes pulse dispersion and adaptive spectral filtering 作為一種重要的低速率語音編碼算法,美國聯(lián)邦標(biāo)準(zhǔn)melp算法對lpc - 10編碼方案做了大量改進,引入了混合激勵,非周期脈沖,殘差付氏幅度譜,脈沖散布和自適應(yīng)譜濾波五個附加特征,在2 . 4kbit / s的速率下取得了比較自然的語音質(zhì)量。
Melp vocoders utilize mixed pulse and noise as the excitation to elimate the buzzes in traditional lpc vocoders , and add a jitter voicing state to overcome the tonal noise . parameters " interpolation , adaptive spectrum enhancement and pulse dispersion also are adopted to improve the continuity . the synthetic speech of melp vocoders sound much more natural and perceivable than the traditional vocoders " Melp聲碼器采用混合脈沖和噪聲激勵解決了經(jīng)典lpc的嗡嗡聲的問題;引入了抖動濁音狀態(tài)以克服音調(diào)噪聲;利用參數(shù)插值、脈沖散布和自適應(yīng)譜增強等措施提高合成語音的自然度和可懂度;此外還采用了多帶激勵,使其具有了比較強的抗背景噪聲的性能。