Packetization of Dolby Digital Plus bitstreams for the HbbTV environment

The HbbTV environment supports only one profile, the HbbTV ISO base media file format Live profile. This profile supports both live and on-demand streaming of ISO base media file format content.

The HbbTV ISO base media file format Live profile is based on the MPEG-DASH ISO base media file format Live profile, and all of the requirements and restrictions for the MPEG-DASH Live profile apply.

All Dolby Digital Plus bitstreams encapsulated in an HbbTV ISO base media file format file must follow the same requirements in the Constraints on Dolby Digital bitstreams in online containers section.

In addition, the HbbTV ISO base media file format file must meet these conditions:

• The size of the moov box must not exceed 2.5 MB (to prevent slow start-up times for broadband connections with a small bandwidth).
• The large size field may be used. The size of the box must not exceed 4 GB.