With the rapid development of mobile Internet technology and smart handheld devices in recent years, IPTV facing the demand of multi-screen integration. Scalable video coding technology can be a good solution to the differences in network speed and resolution of device. In this paper, we design and implement an HD real-time system of IPTV based on H264/SVC standard. The finalized H264/SVC standards are able to achieve scalable coding in the temporal, spatial, or fidelity domain. This paper presents a detailed introduction of TS encapsulation, AVC decoding and the encapsulation of SVC. By encoding the video in real-time, users with different bandwidth and device resolution concurrent viewing program in real-time. In the end of the paper, the experiments proved the effectiveness and stability of the system.