鎮ㄥソ锛屾杩庝締鍒扮董搴浕瀛愬競鍫寸恫(w菐ng)
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銆�銆�G.726鏄疘TU-T瀹氱京鐨勪竴绋煶闋荤法纰肩畻娉�.涓昏鍩轰簬浠�16-40kibt/s姣旂壒鐜囬亱(y霉n)琛岀殑銆侴.726鏄疘TU鍓嶈韩CCITT浜�1990骞村湪G.721鍜孏.723妯�(bi膩o)婧�(zh菙n)鐨勫熀绀�(ch菙)涓婃彁鍑虹殑闂�(gu膩n)浜庢妸64kbps闈炵窔鎬CM淇¤櫉杞�(zhu菐n)鎻涚偤40kbps銆�32kbps銆�24kbps銆�16kbps鐨凙DPCM淇¤櫉鐨勬(bi膩o)婧�(zh菙n)銆侴.726妯�(bi膩o)婧�(zh菙n)绠楁硶绨″柈,瑾為煶璩�(zh矛)閲忛珮,澶氭杞�(zhu菐n)鎻涘悗瑾為煶璩�(zh矛)閲忔湁淇濊瓑,鑳藉鍦ㄤ綆姣旂壒鐜囦笂閬�(d谩)鍒扮恫(w菐ng)绲�(lu貌)绛夌礆鐨勮┍闊宠唱(zh矛)閲�,寰炶�屽湪瑾為煶瀛樺劜鍜岃獮闊冲偝杓搁牁(l菒ng)鍩熷緱鍒板唬娉涙噳(y墨ng)鐢ㄣ��
銆�銆�G.726绶ㄧ⒓鍣ㄦ鍦栧鍦栨墍绀�銆侴.726瑾為煶绶ㄧ⒓鍣ㄩ鍏堝皣杓稿叆鐨凙寰嬫垨渭寰嬬殑log-PCM淇¤櫉S(k)杞�(zhu菐n)鎻涙垚绶氭�х殑PCM纰糞l(k),鐒跺悗鑸囬爯(y霉)娓俊铏烻e(k)鐩告笡鐢�(ch菐n)鐢熷樊鍒嗕俊铏焏(k),鍐嶅皪宸�间俊铏熼��(j矛n)琛岃嚜閬╂噳(y墨ng)閲忓寲,鐢�(ch菐n)鐢�2锝�5姣旂壒ADPCM纰糏(k)銆備竴鏂归潰灏嘔(k)閫佽嚦瑙ｇ⒓鍣�;鍙︿竴鏂归潰閫嗚嚜閬╂噳(y墨ng)閲忓寲鍣ㄥ埄鐢↖(k)鐢�(ch菐n)鐢熼噺鍖栧樊鍒嗕俊铏焏q(k)銆傞爯(y霉)娓俊铏烻e(k)鍜岄噺鍖栧樊鍒嗕俊铏焏q(k)鐩稿姞鐢�(ch菐n)鐢熸湰鍦伴噸妲�(g貌u)淇¤櫉Sr(k)銆傝嚜閬╂噳(y墨ng)闋�(y霉)娓櫒鏄敱浜岄殠妤甸粸(di菐n)鍜屽叚闅庨浂榛�(di菐n)绲勬垚鐨勬烤娉㈠櫒,鏍规摎(j霉)閲嶆(g貌u)淇¤櫉Sr(k)鍜岄噺鍖栧樊鍒嗕俊铏焏q(k)鐢�(ch菐n)鐢熻几鍏ヤ俊铏熺殑闋�(y霉)娓俊铏烻e(k)銆傞噺鍖栧櫒姣斾緥鍥犲瓙鑷仼鎳�(y墨ng)鍠厓鏍规摎(j霉)杓稿叆淇¤櫉鐨勭壒鎬ц▓绠楅噺鍖栧櫒姣斾緥鍥犲瓙y(k),鐢ㄤ締鎺у埗閲忓寲鍣ㄥ拰閫嗛噺鍖栧櫒,浠ョ嵅寰楄嚜閬╂噳(y墨ng)鍔熻兘銆傞噺鍖栧櫒姣斾緥鍥犲瓙鐢卞揩閫熷洜瀛愬拰鎱㈤�熷洜瀛愬叐閮ㄥ垎,浠ュ強閫熷害鎺у埗鍥犲瓙al(k)灏嶉�欏叐閮ㄥ垎鐨勫姞娆�(qu谩n)绲勬垚銆傞�熷害姣斾緥鍥犲瓙al(k)鐨勮▓绠楃敱鑷仼鎳�(y墨ng)閫熷害鎺у埗鍠厓鑸囬煶瑾�(di脿o)鍜屽偝閫佹娓櫒鍠厓瀹屾垚銆�
銆�銆�G.726瑾為煶瑙ｇ⒓鍣ㄧ殑瑙ｇ⒓閬庣▼瀵﹂殯涓婂凡缍�(j墨ng)鍖呭惈鍦ㄧ法纰煎櫒涓�,鍙槸澶氫簡杓稿嚭PCM鏍煎紡杞�(zhu菐n)鎻涘柈鍏冨拰鍚屾涓茶绶ㄧ⒓瑾�(di脿o)鏁村柈鍏冦�傝几鍑篜CM鏍煎紡杞�(zhu菐n)鎻涙槸灏囩窔鎬CM纰艰綁(zhu菐n)鎻涚偤A寰嬫垨渭寰婸CM纰�;鍚屾涓茶绶ㄧ⒓瑾�(di脿o)鏁存槸鐐轰簡闃叉澶氱礆鍌宠几銆佽綁(zhu菐n)鎻涢亷绋嬩腑鐨勮宸��
銆�銆�瑷�(sh猫)瑷堢殑绶ㄨВ纰煎櫒鏄湪瑾為煶瑷橀寗绯荤当(t菕ng)涓鐝�(xi脿n)G.726寤鸿鐨勯�熺巼鐐�32kbps鐨凙DPCM绠楁硶,鏍规摎(j霉)瀵﹂殯鎯呮硜灏嶇畻娉曢��(j矛n)琛屼簡涓�浜涚啊鍖栧拰鏀归��(j矛n)銆�
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