Evaluating QoS Parameters for IPTV Distribution in Heterogeneous Networks
This work addresses IPTV service quality assessment for network engineers, but is incremental as it applies existing technologies to a specific testing scenario.
The researchers developed an architecture to evaluate Quality of Service (QoS) parameters for IPTV distribution in heterogeneous networks, testing three stream types (real-time camera, VoD, and DVB-S television) and found that the DVB-S stream performed best with minimal packet loss, delays, and jitter.
The present work presents an architecture developed to evaluate the QoS parameters for the IPTV heterogeneous network. At its very basic level lie two software technologies: Video LAN and Windows Media Services with two operating systems: Windows and Linux. Three types of streams are analyzed, which will be transmitted to a Linux VLC client through means of the aggregation and access servers. The first stream is generated in real time by a capture camera, processed by the encapsulated VC-1 encoder and sent to the Media Server, while the second one is of VoD(Video on Demand) type and the third one will be handled by DVBViewer through the MPEG TS form. The first stream is transcoded in H.264-AAC such that the Linux stations will recognize its format. Through the simultaneous transmission of the three streams, we are analyzing their performance from a QoS parameters point of view by means of an application implemented in C programming language. The stream transporting the DVB-S television content was proven to ensure the best performance regarding loss of packets, delays and jitter.