DVB creates an initiative together with HbbTV to promote the standardization of accessibility services in today’s television

Recently, the DVB has announced a set of capabilities needed for the service expansion that is planned to be created within the possibilities offered by HbbTV. These needs are related to Essential Requirements. The objective is to extend and revise some key DVB specifications to support better signalling accessibility services, to facilitate easy use of such services by end users.

The Commercial Requirements, published as DVB BlueBook C102, will guide technical work to update the existing DVB-SI, DVB-I and DVB-DASH specifications. The initiative was triggered by recent work within the HbbTV Association.

TVs have more and more accessibility options, albeit with inconsistencies between brands and models, while HbbTV also has a broad set of accessibility tools. That is the context. HbbTV has designed Accessibility Framework to enable apps and TV sets to have a constructive dialogue between themselves to decide which will take responsibility for realizing a feature. It also allows rich settings data from the TV settings menus to be available to HbbTV apps.

DVB’s forthcoming work will focus on enabling the signalling to viewers of the availability of additional accessibility services, provided within the related HbbTV app. Their availability would be shown when navigating a DVB-SI or DVB-I based channel list or EPG, with the signalling applying to linear services delivered over both broadcast and DVB-DASH streaming.

The work also aims to enable greater consistency of accessibility services across broadcaster streamed video-on-demand (HbbTV) services, streamed linear services (DVB-DASH), and traditional broadcast services, including consideration of any opportunity to achieve consistency of approach with the HbbTV Accessibility Framework for service provisioning based on terminal capabilities and user preferences.

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