WMA l? Windows Media Audio. WMA l? m?t ??nh d?ng ?m thanh m?i do Microsoft ph?t tri?n, c?ng ???c bi?t ??n nh? MP3. V?i m?t t? l? cao h?n trong c?c t?p tin n?n v? ch?t l??ng ?m thanh t?t h?n sau n?y, th?m ch? v??t xa nh?ng ng??i trong RA.

?? chuy?n ??i rm to wma, h?y c?i ??t RealPlayer m?i nh?t, n?u Windows ?? kh?ng ???c c?i ??t n?. Download RealMedia Splitter. Gi?i n?n file v?i WinRAR, s? d?ng d?ng l?nh "regsvr32 RealMediaSplitter.ax" ?? ??ng k? n?. Ho?c t?i v? d?i t?p tin v?o th? m?c Release ?? ??ng k?.

Download WMA Converter m? c? th? chuy?n ??i rm v?o t?p tin wma. Ch?n m?t t?p tin rm, ??t th?i gian b?t ??u, th?i gian k?t th?c ho?c bitrate m? h?a ?m thanh, n?u c?n thi?t. C?c bitrate l? l?n h?n, k?ch th??c t?p tin l? l?n h?n, ch?t l??ng ?m thanh cao h?n, v? ng??c l?i. Nh?n v?o n?t Convert ?? chuy?n ??i rm to wma.

H.261 l? l?n ??u ti?n video k? thu?t s? th?c hi?n m? h?a ti?u chu?n thi?t k? c?a ITU-T ?? ph?t tri?n truy?n h?nh h?i ngh? v? video tr?n ?i?n tho?i ISDN. N? s? tr? th?nh khu?n kh? thi?t k? c?c ti?u chu?n qu?c t? sau n?y c?a Video Coding bao g?m MPEG-1, MPEG-2/H.262 v? H.263. H.261. N? ch? ?? v?i CIF QCIF v? ??nh d?ng h?nh ?nh b?ng c?ch chia m?i khung h?nh ?nh v?o l?p, Acer nh?m kh?i l?p, Acer kh?i v? kh?i l?p. H.261 su?t ??u ra l? kh?ng ??i, trong khi ch?t l??ng h?nh ?nh l? kh?ng ??ng v?ng.

H.263 l? ti?u chu?n d? th?o c?a ITU-T ???c thi?t k? cho bit th?p truy?n d?ng. Tr?n th?c t? ti?u chu?n c? th? ???c s? d?ng trong ph?m vi r?ng h?n bitstream nh?ng kh?ng gi?i h?n ??n bit th?p d?ng. H?n n?a, n? ngh? r?ng s? ???c s? d?ng ?? thay th? H.261.The thu?t to?n m? h?a c?a H.263 l? c?ng v?i ?? c?a H.261.but b?n v?n c? m?t s? kh?c bi?t. v? d? nh? H.263 qua b?n ?? ch?nh x?c cho b?i th??ng chuy?n ??ng trong khi H.261 qua t?t c? c?c ?i?m ?nh v? ?? ch?nh x?c chu k? l?c, H.263 ch?a b?n tu? ch?n consultable ?? c?i thi?n hi?u su?t.

Sau khi c?i ??t b? gi?i m? H.261 ho?c H.263, wma chuy?n ??i c? th? chuy?n ??i ?? h.261/h.263 wma file.