James D. Black

High definition video broadcast over core IP networks

This paper presents the concepts and results of high definition (HD) video transport over core IP networks. It discusses the challenges and benefits of broadcasting HD video over core IP network as opposed to traditional methods. The key video codec and network performance parameters, such as packet loss, jitter, latency, and network outages are analyzed. HD MPEG video FEC performance is assessed against certain network conditions. An objective video quality methodology for HD video transport performance is proposed.

Video Streaming over 3G Networks with GOP-Based Priority Scheduling

A bandwidth-efficient video streaming algorithm over the cdma2000 1x EV-DO network using GOP-based priority scheduling is proposed in this work. The proposed algorithm performs an application adaptation by considering the postchannel status to cope with the fluctuating wireless mobile radio channel. The peak-signal-to-noise-ratio (PSNR) value and the number of buffer underflows at the mobile terminal (MT) are used as performance metrics to indicate the spatial and temporal quality of received video, respectively. It is demonstrated by computer simulation that the proposed priority scheduling algorithm adapts source bit rates of pre-encoded video streams to the bandwidth fluctuation of wireless channels well and yields satisfactory spatial and temporal video quality.

Service-aware transport network: opportunities and challenges

In this paper we propose a new concept of future service-aware transport networks that are built on converged wireless-wired transport networks, enable service layer convergence, and also support application layer convergence. This concept is derived from the emerging trend of business convergence among the telecommunication, cable, and entertainment segments, and technology convergence among the telecommunications, computer, and software industries. We also identify QoS as a technical backbone to future service-aware transport networks, and from the perspective of an integrated carrier having both wireless and wired assets, discuss related research opportunities and challenges, especially those involved in optical networks. We finally present an adaptive apparatus for high availability, capacity efficiency, and QoS-guaranteed protection and restoration for optical networks. This paper is intended to promote academic and industrial attention to some core technical challenges that lie ahead for the telecommunication industry and to spur strategically important research and perhaps also some standards activities.