近百年来,大众媒体的发展一直在改变着人们的生活,从报纸、广播、电视到网络。虽然新兴的媒体不能完全取代旧的媒体,如电视没有取代报纸和广播,但是电视已成为第一大媒体的事实是不可否认的。同样,我们也不能忽视网络—这个第四媒体的发展。有人说网络的发展不会对电视构成威胁,网络公司没有良好的营业模式,音视频在因特网上不能流畅传输等都是制约网 In the past century, the development of the mass media has been changing people’s lives, from newspapers, radio and television to the Internet. Although the emerging media can not completely replace the old media, such as the fact that television does not replace newspapers and radio, the fact that television has become the largest media is undeniable. Similarly, we can not ignore the network - the development of this fourth media. Some people say that the development of the Internet will not pose a threat to the TV network companies do not have a good business model, audio and video can not be transmitted smoothly on the Internet are all constraints network