Design, development and assessment of control schemes for IDMS in a standardized RTCP-based solution

Abstract

-Currently, several media sharing applications that allow social interactions between distributed groups of users are gaining momentum. This paper focuses on a key factor for providing a satisfying feeling of togetherness in those networked scenarios, which is to ensure synchronous playout between distributed users. This research problem is known as Inter-Destination Media Synchronization (IDMS). Particularly, this paper discusses the benefits of extending RTP/RTCP protocols for IDMS purposes. Accordingly, newly defined RTCP messages and control techniques have been added to a previous version of a centralized RTP/RTCP-based IDMS solution to enable an adaptive, highly accurate and standardized solution.Moreover, as different control schemes for IDMS exist, and each one is best suited for specific use cases, our IDMS solution has been extended to be able to adopt each one of them. Simulation results prove the satisfactory responsiveness of our IDMS solution, as well as its consistent behavior when using each one of the deployed control schemes.

Understanding Timelines Within MPEG Standards

“…In [85], the RTCP-based IDMS solution specified in RFC7272 [83] is implemented and evaluated, by using different architectural schemes, control algorithms and adjustment techniques.…”

Design, development and evaluation of an adaptive and standardized RTP/RTCP-based IDMS solution

“…Through simulation tests, the responsiveness, effectiveness and consistent behavior of all deployed control schemes, algorithms and adjustment techniques for IDMS can be assessed, by providing measurements about networking-related aspects, objective QoS statistics, as well as delay differences (asynchrony) between Sync Clients. In [13,14], readers can find the obtained simulation results and conclusions up to date. However, even though considering the convenience of simulation tests, they cannot definitively validate the performance of our IDMS solution.…”

“…Several standard protocols were analyzed for assessing their suitability for being extended for IDMS purposes [14]. But, definitely, RTP/RTCP were selected because of their compliance with most of the above-described requirements.…”

“…Additionally, an SDP attribute was defined to signalize the use of these RTCP messages. The format of the RTCP messages and their exchange process to achieve IDMS can be found in [4,14,15].…”

“…The proposed RTCP messages and the SDP attribute for IDMS have taken into account this requirement [15]. Also, further control algorithms have been designed to achieve this capability, as proved in [13,14].…”