Their right to information and services in their first language must also be respected, in this case by providing signed interpretation. Large display screens, the use of large characters for text, and magnifying devices can help partially sighted people, but for those who cannot see visual material, even with magnification, other solutions are needed. Providing a voice description of the visual sequences can convey the visual content of television or cinema programming. Video description might also be of wider interest, for example, for keeping in touch with what's happening in a programme when in another room or while driving a car. Accessibility of teletext information services also needs to be considered, as they are an increasingly important feature of everyday access to information and entertainment.
Products are now on the market that provide a spoken narration of the teletext information.
Good practice in this area means combined approaches by industry and public policy to ensure that all of the audio-visual media are accessible to all people. There is also considerable variation in the types of programmes that are captioned or interpreted. For example, live events are less likely to be covered and important areas such as children's programmes are not always covered. Regulatory requirements for full captioning and interpretation of TV programming is becoming even more important with the increasing commercialisation of the TV industry. Attention has been given to this in the UK, for example, where commercial broadcasters are now required by law to provide sub-titles on their programmes.