随着MP3市场的普及度稳步升高,MP4也渐为消费者所接受。MP3是一种单一的便携式或袖珍式音乐录放机,MP4却是一种便携式或袖珍式多媒体录放机,它不仅可以录放MP3格式的音乐,更重要的是它能够按MPEG-4的格式录放电影。目前,MP4还没有统一的标准,所以厂商都按自己的标准生产MP4机, With the popularization of the MP3 market steadily increased, MP4 has gradually become accepted by consumers. MP3 is a single portable or pocket music player, MP4 is a portable or pocket-sized multimedia player, it can not only record MP3 format music, more importantly, it can record and play movies according to MPEG-4 format . At present, MP4 does not have a uniform standard, so manufacturers are according to their own standard production MP4 machine,