Next Gen Academy II: Transport Matters

Can UHD OTT be Complementary to Terrestrial UHD Broadcast? - $15

UHD delivery over terrestrial networks is a challenge in countries where there is no dedicated spectrum allocated for it. In an environment where UHD has to be simulcast with existing SD and HD, only a limited number of channels can be broadcast in UHD. In some cases, they do not have the spectrum for a 24/7 UHD broadcast; only a part-time channel through a time slot system is possible. With the advance of low latency scheme for OTT (i.e., DASH and HLS), it is now possible to mix and match broadcast and OTT without a noticeable difference in delay between the two delivery mechanisms. Broadcasters can offer an UHD experience 24/7 by using other delivery channels for UHD, while HD (1080p60 HDR) is transmitted OTA. This paper will examine OTT UHD delivery and assess which solution is the best from a technical and financial point of view.

Thierry Fautier | Harmonic | San Jose, California, United States

Statistical Multiplexing of DASH Segments in the ATSC 3.0 System - $15

When it comes to ATSC 3.0, uncovering effective ways to optimize bandwidth is the biggest challenge facing broadcasters today.

However, the answer to this challenge is available: leverage a statistical multiplexing solution that maximizes the efficiencies of over-the-air distribution of HTTP Adaptive Bitrate (ABR) streams. The statistical multiplexing algorithms ? available today with nearly two decades of research ? help ensure all channels in a statmux pool are assigned the right amount of bandwidth on video frame basis to deliver high quality at every point in time.?By utilizing a Real Time ROUTE encoder, broadcasters can encapsulate DASH segments into an ATSC 3.0 stream without impacting the ATSC 3.0 gateway itself.

The group of services, designated for a single standard RF channel, are statistically multiplexed and individually delivered as variable bitrate (VBR) Adaptive Transport Stream (ATS) streams, aggregated bitrate of which is fixed and controlled by HEVC encoder. These ATS streams are packaged in DASH format and published to ROUTE encoder which maintains original segment encode rate adding a small, fixed overhead.

HEVC encoder built-in tools are used to monitor statmux pool bitrate. The tools complementing ROUTE encoder are used to monitor aggregated bitrate of group of services sharing the same frequency after ROUTE layer processing.

Elke Hungenaert | Synamedia Ltd. | Middlesex, United Kingdom
Nick Fielibert | Synamedia Ltd. | Middlesex, United Kingdom
Samie Beheydt | Synamedia Ltd. | Middlesex, United Kingdom
Mark Myslinski | Synamedia Ltd. | Middlesex, United Kingdom
Jovo Miskin | Synamedia Ltd. | Middlesex, United Kingdom