基于DSP语音信线号性与非线性量化相互转化的新方法.docVIP

摘　　要 随着通信、?计算机网络等技术的飞?速发展,语音压缩编码?技术得到了快速发展和?广泛应用。尤其是最近?20年，语音压缩编码?技术在移动通信、卫星?通信、多媒体技术以及?IP电话通信中得到普?遍应用，起着举足轻重?的作用。人们相互交流?的信息量也在不断地急?剧增加，庞大的语音信号给存储和传输带来的压力， Abstract? With the ?communicat?ions, comp?uter netwo?rks of rap?id develop?ment, voic?e compress?ion coding? technolog?y has been? rapid of ?developmen?t and wide? of applic?ation. Esp?ecially in? the last ?20 years, ?speech cod?ing techno?logy was w?idely appl?ication in? the mobil?e communic?ations, sa?tellite co?mmunicatio?ns, multim?edia and I?P telephon?y technolo?gy, it pla?ys a pivot?al role. P?eople mutu?ally excha?nging info?rmation is? increasin?g dramatic?ally, huge? voice sig?nal data t?o the stor?age and tr?ansmission? brought h?uge pressu?re, it mak?es channel? resources? become mo?re and mor?e valuable?. Therefor?e, speech ?compress a?nd speech ?coding tec?hnology is? becoming ?more and m?ore import?ant. This ?topic is b?ased on th?e DSP of v?oice compr?ession alg?orithm des?ign and im?plementati?on. The co?llected vo?ice signal? use comp?ression al?gorithm to? treat by ?DSP. The s?peech sign?al after c?ompression? is output? by extern?al equipme?nts finall?y. It has ?realized t?he speech ?signal col?lection、co?mpression ?and playba?ck finally?. Accordin?g to the s?ystems fu?nctional r?equirement?s, this pa?pers compl?ete hardwa?re and sof?tware desi?gn of the ?system. A ?law design?ed a flow ?chart of t?he softwar?e codec in? order to ?TMS320VC55?02 process?or hardwar?e developm?ent platfo?rm for the? realizati?on of the ?speech sig?nal on the? A-law com?pression d?ecompressi?on algorit?hms, And g?ive the co?mpression ?process fl?ow diagram?. 引 ?言 语音是人类相互进?行交流时使用最多、最?自然、最基本也是最重?要的信息载体。语音的?产生是一个复杂的过程?，包括心理和生理等方?面的一系列动作。由于?其特殊的作用，人们历?来十分重视对语音信号?和语音通信的研究。 ?近十几年来语音技术在?人们实际需要的推动下?快速的发展起来，语音?技术是一个跨学科、涉?及面广的综合学科，包?括声学、语音学、生理?学、心理学、数字信号?处理、信息工程、通信?理论、电子科学、模式?识别、人工智能等众多?学科，而且许多对语音?数字信号处理有促进作?用的学科如神经网路、?小波理论、遗传算法、?进化算法、模糊理论、?混沌理论等也在蓬勃发?展。 随着当今世界数?字技术的飞速发展，数?字业务量的急剧增长，?如何在提供高质量语音?的基础上用最低的码率?来传送和储存数字语音