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3 The adoption of digital
Published in Chris Forrester, The Business of Digital Television, 2013
A standard uncompressed digital signal would use some 133 Mbps (megabits per second) and would not be economic to broadcast, taking as it would almost as much bandwidth as an analogue signal. Digital television overcomes analogue's limitations and permits more efficient use of the available bandwidth, because of the compression of the broadcast signal. This process is far from straightforward but image digitization technology follows the sampling theorems that are now the basis for all-digital photography and image capture. However, television is not a ‘still’ image (although in essence made up of many still ‘snapshots’ of an event) and is constantly seen as ‘moving’.
Data Transmission
Published in Goff Hill, The Cable and Telecommunications Professionals' Reference, 2012
Stuart D. Walker, Emilio Hugues-Salas, Rouzbeh Razavi, Tahmina Ajmal
Compression/decompression of a video signal became possible thanks to the introduction of digital television, which acted as an improvement over analogue television. Digital television now offers High-Definition Television (HDTV) as well as standard-definition TV, an increased number of programs, reception in moving means of transportation, and distribution over the Internet and telecommunications networks.
Accessibility of services in digital television for hearing impaired consumers
Published in Assistive Technology, 2022
The next question was related to the concept of digital television. While digital television offers improved picture quality as well as more content than analogue television, it also affords flexibility regarding the form in which information is presented to the viewer (Ellis, 2014). Accessibility features, technically possible via digital delivery, alter the form in which information is presented to viewers in order to compensate the effects of impairment. Although sign language and subtitles have a longer history regarding the provision of television accessibility features, the move to digital broadcasting and technical trials have seen users with hearing impairment to adopt that strategies.