【摘要】 随着ATM技术和编码技术的成熟,ATM上可以传送增强型媒体,这使得视听业务的广泛应用成为可能。主要讨论在ATM网络上恒定比特率(CBR)或可变比特率(VBR)的MPEG-2的传输,这涉及到适配层的选择,MPEG-2帧的封装,ATM业务类型的选择等问题。更多还原

【Abstract】 With the growth of Asynchoronous Transfer Mode(ATM) technology and the maturity of coding standards, the wide use of high-quality audio-visual services becomes possible.In this article,we discuss the principle issues involved in transporting MPEG-2 streams over ATM networks for both constant bit-rate(CBR) and variable bit-rate(VBR) MPEG-2 transport streams.These include the choice of adaptation layer,method of encapsulation of MPEG-2 packets in AAL packets,selection of service class in the ATM network.更多还原