Due to the individual shortcomings , traditional mpeg - 1 layer iii ( mp3 ) technique and a high - performance audio coding technique - - advanced audio coding ( aac ) have been strongly challenged by a newly developing audio technique : ogg vorbis 因為各自的局限性,傳統(tǒng)的mpeg - 1第三層音頻技術(shù)( mpeg - 1layeriii , mp3 )和目前代表音頻技術(shù)較高水平的先進型音頻編碼技術(shù)( advancedaudiocoding , aac ) ,受到了一種新興音頻技術(shù)oggvorbis的強有力挑戰(zhàn)。
Drm is a technology aims to improve sound quality of am transmission below 30 mhz and to reduce interference common in medium wave environment . new compression technologies known as mpeg4 advanced audio coding ( aac ) and spectral band replication ( sbr ) are employed to offer sound quality comparable to that of fm transmission 它是針對30mhz以下的調(diào)幅( am )廣播而設(shè)計,大大提高了音質(zhì),并改善了中波廣播較易受干擾的情況;系統(tǒng)采用最新的壓縮技術(shù)mpeg4advancedaudiocoding ( aac )和spectralbandreplication ( sbr ) ,音質(zhì)足可與fm廣播媲美。