Scalable video multicast

Scalable video multicastis a new wireless multicast technology. In scalable video multicast, the video program subscribers can view the program in accordence

with their link conditions. The scalable video multicast has employed by many stardands, such as e-MBMS, e-MBS, DVB-H,and so forth.

Traditional mobile networks were initially designed for unicast services, and may waste radio network resources by transmitting the same content in multiple copies to

different users. With video multicasting, more efficient resource utilization would however be possible. Multicast service is therefore, a significant part of the

current mobile services. Examples include the Multicast/Broadcast Service (MBS) over the WiMAX, the Multimedia Broadcast/Multicast Service (MBMS) within

the LTE, the Digital Video Broadcasting services (e.g., DVB-T, DVB-H) defined in European Telecommunication Standard (ETS), and the MediaFLO

presented by Qualcomm.

In mobile networks, all frames with multicast Receiver Address are transmitted at one of the rates included in a basic rate set. In order to guarantee coverage to all

associated users, the transmission rate is typically fixed to one of the low basic rates. This limits the rate at which multicast data can be sent, for example, high-

definition video is hard to sent via multicast. To address this problem, scalable video multicasting (SVM) technology has been proposed. In SVM, video is

encoded into one base layer (BL) and several enhancement layers (ELs) by using Scalable Video Coding (SVC) technique. The BL ensures the basic video quality of all

users and each additional EL further enhances the quality of the video.