Based　on　the　international　telecommunication　union　telecommunication　standardization　sector　(ITU-T)　recommendation　G.729.1　and　modified　modulated　lapped　transform　(MLT)　coding,　a　super-wideband　embedded　variable　bit-rate　speech　and　audio　coding　algorithm　was　proposed,　the　bit-rates　of　this　codec　was　from　8kbit/s　to　64kbit/s.　The　information　in　the　frequencies　of　0-7　kHz　was　encoded　by　G.729.1　codec　at　8-32kbit/s,　the　information　in　the　frequencies　of　7-14　kHz　was　encoded　by　the　transform　coding　at　36,　40　and　48kbit/s,　and　G.729.1　residual　signal＇s　MDCT　(modified　discrete　cosine　transform)　was　encoded　by　the　transform　coding　at　56　and　64kbit/s.　The　objective　and　subjective　listening　tests　show　that　this　codec　has　good　performance　compared　with　Terms　of　Reference　given　by　ITU-T.