This standard specifies a set of principles and considerations for Digital Television products in support of older people and persons with disabilities in addition to mainstream users. The effect of following the principles and considerations as set out in this standard is to ensure that the widest range of users can access, understand and use Digital Television products. These principles and considerations cover four main user profiles such as individuals with hearing impairments, individuals with sight impairments, individuals with mobility impairments and individuals with cognitive impairments. This standard applies to consumer solutions whose primary function is to receive Digital Television, such as integrated digital televisions, set top boxes, digital television recorders and equivalent products and devices (Annex D). All these solutions are referred to as Digital Television solutions throughout this document. The standard does not cover solutions that support Digital Television as a secondary function (for instance gaming consoles or computers with digital receiver cards). However, much of the content might also be useful to implementers of the later type solutions. This standard intends to cover solutions that provide access to linear broadcast as well as those that offer on-demand/catch-up broadcast over Internet Protocol. It also covers hybrid devices, sometimes referred to as Connected TV solutions. Content related aspects of Digital Television are not solely a property of the Digital Television solution used by people to consume linear or on-demand content. This document does not cover authoring requirements for content producers. It does set out functionality needed in Digital Television solutions to enable accessible content to be delivered to the end user. This standard does not cover delivery, unpacking, secure installation on a stand or wall mounting or first time connection of the power and signals.