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Broadcast Media : Digital Radio and Television. News Article Digital Radio Digital Television. Social & Ethical Aspects Digital Radio Digital Television. IT systems in a social context Digital Radio Digital Television. Areas Of Impact Digital Radio Digital Television.
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News Article Digital Radio Digital Television Social & Ethical Aspects Digital Radio Digital Television IT systems in a social context Digital Radio Digital Television Areas Of Impact Digital Radio Digital Television
Social Issues – Digital Radio Back Issues Social Impact Stakeholders
Social & Ethical Aspects – Digital Radio Back Stakeholders • Listeners • Broadcasters
Social Issues – Digital Radio Back Privacy – Information can be released about someone to the extent that everyone on the internet can hear it if they access the digital radio as there are no geographic boundaries. Globalization – Any event can be broadcasted immediately on digital Radio and everyone can hear it. There are no geographic boundaries. Equality of access – Only those that can afford it may have it.
Social Issues – Digital Television Back Issues Social Impact Stakeholders
Social & Ethical Aspects – Digital Television Back Stakeholders • Viewers • Film Industry • Broadcasters
Social Issues – Digital Television Back Globalization & Cultural Diversity – Leads to cultural homogeneity as television broadcasts have become better. There is less diversity. Equality of access – Only those that can afford it may have it.
IT Systems – Digital Radio Back Different Formats For Saving Music MP3 Files How Digital Radio Works How did Digital Radio emerge
IT Systems – Digital Radio Back Different formats for saving music • MP3 – More popular method of transfer throughout the internet. (More Detail) • WMA – Format made by Microsoft with digital rights management built-in. • WAV – Files are larger, occupies more disk space. • OGG – Open source codec means that no one has to pay license fees to use unlike other formats.
IT Systems – Digital Radio Back How do MP3 files work? Explanation The MP3 format is a compression system for music. Why MP3 is an advantage? • Reduce the number of bytes in a song without hurting the quality of the song's sound. • Compress a CD-quality song by a factor of 10 to 14 without noticeably affecting the CD-quality sound. • A 32-megabyte (MB) song on a CD compresses down to about 3 MB. • Enabling download in minutes rather than hours, and more storage available as files are smaller.
IT Systems – Digital Radio Back How Digital Radio works?
IT Systems – Digital Radio Back How Digital Radio emerge? Satellite radio is an idea over a decade in the making. In 1992, the U.S. Federal Communications Commission (FCC) allocated a spectrum in the "S" band (2.3 GHz) for nationwide broadcasting of satellite-based Digital Audio Radio Service (DARS).
IT Systems – Digital Television Back Difference between Digital & Analog Television How Digital Television Works High Definition TV How Digital Television Emerged
IT Systems – Digital Television Back Difference between Digital & Analog Television • Resolution Analog TV picture is much fuzzier than the digital TV image. There is a significant difference in picture quality that is even more obvious when the image is moving. (Example) A picture that is displayed on a small analog TV is better than on a big one. A digital signal can support a higher resolution, so the picture will still look good when shown on a larger TV screen. • Digital TV offers much better sound. • Digital TV offers better aspect ratio. (Explain) • The video can be progressive rather than interlaced - the screen shows the entire picture for every frame instead of every other line of pixels. • TV stations can broadcast several signals using the same bandwidth. This is called multicasting. Frees space for more digital channels. • If broadcasters choose to, they can include interactive content or additional information with the DTV signal. • It can support high-definition (HDTV) broadcasts. This should highlight what Digital Television is.
IT Systems – Digital Television Back How Digital Television works? • Sound and pictures are converted into a digital format and compressed, using as few bits as possible to convey the information on a digital signal. This technique enables several television channels to be carried in the space used by the current analogue signals to carry one channel. • Digital signals can be received by standard aerials, satellite dishes or via cable. • Decoded and turned back into sound and pictures by using a separate set-top box, or a decoder built into your television.
IT Systems – Digital Television Back High Definition Television (HDTV) A set of digital television (DTV) standards that offer the highest resolution and sharpest picture. Although a few HDTV sets are available in standard screen sizes, the overwhelming majority are wide screen, which eliminates the letterbox effect when watching HD programs and movies in their original format. • Aspect ratio - Standard television has a 4:3 aspect ratio - it is four units wide by three units high. HDTV has a 16:9 aspect ratio, more like a movie screen. • Resolution - The lowest standard resolution (SDTV) will be about the same as analog TV and will go up to 704 x 480 pixels. The highest HDTV resolution is 1920 x 1080 pixels. HDTV can display about ten times as many pixels as an analog TV set. • Frame rate - A set's frame rate describes how many times it creates a complete picture on the screen every second. DTV frame rates usually end in "i" or "p" to denote whether they are interlaced or progressive. DTV frame rates range from 24p (24 frames per second, progressive) to 60p (60 frames per second, progressive).
IT Systems – Digital Television Back Resolution between Digital & Analog Television Digital Television Analog Television
IT Systems – Digital Television Back Resolution between Digital & Analog Television Digital Television Analog Television
IT Systems – Digital Television Back Aspect Ratio Difference between Digital & Analog Television
