4.2Kb/s碼激勵(lì)線性預(yù)測語音編碼方案的實(shí)時(shí)實(shí)現(xiàn)
A REAL-TIME IMPLEMENTATION OF 4.2Kb/s CELP SPEECH CODING
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摘要: 本文表述了一個(gè)4.2Kb/s碼激勵(lì)線性預(yù)測語音編碼方案在單個(gè)DSP上的實(shí)時(shí)實(shí)現(xiàn);提出了一個(gè)減少自適應(yīng)碼本搜索復(fù)雜性的算法;討論了A參數(shù)轉(zhuǎn)變?yōu)長SP參數(shù)的求解方法;描述了該編碼方案在具有一片TMS320C30的商用開發(fā)系統(tǒng)上的實(shí)時(shí)實(shí)現(xiàn)過程。
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關(guān)鍵詞:
- 語音編碼; 線性預(yù)測; 矢量量化
Abstract: This paper presents a real-time implementation of 4.2Kb/s CELP speech coding on single DSP. An algorithm reducing search complexity for adaptive codebook is suggested, the solving method, which changes a parameter into LSP parameter, is discussed. The real-tune implementation procedure of this coding on a commercial development board with a single TMS320C30 is discribed. -
Schroeder M R，Atal B S. Code-excited linear prediction(CELP): High quality speech at very low[2]bit rates. in Proc. IEEE Int. Conf. ASSP, Tampa, FL: 1985, 937-940.[3]Cuperman V, Gersho A, Pettigrew R. Low-delay vector excitation coding of speech at 16Kb/s. IEEE[4]Trans. on COM., 1992, COM-40(1): 129-139.[5]Gerson I, Jasiuk M A. Vector sum excited linear prediction(VSELP) speech coding at 8Kbps. in Proc. IEEE Int. Conf. ASSP, New Mexico, USA: 1990, 461-464.[6]Campbell J P, Welch V C, Tremain T E. An expandable error-protected 4800bps CELP coder(U. S.[7]Federal standard 4800bps voice coder). in Proc. IEEE Int. Conf. ASSP, Glasgow, Scotland: 1989, 735-738.[8]Bao Cha,ngchun, et al. Improved populating code-excited linear predictive coder. The Journal of[9]China Universities of Posts and Telecommunications. 1994, 1(1), 45-51.[10]鮑長春,等.碼激勵(lì)線性預(yù)測語音編碼快速算法及評(píng)價(jià).電子科學(xué)學(xué)刊,1995, 17(1): 70-79. -
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