Presentation on theme: "Digital Radio and Television"— Presentation transcript:
1 Digital Radio and Television Broadcasting MediaDigital Radio and Television
2 Introduction to Broadcasting Media Broadcasting - this is the distribution of audio and/or video signals which transmit programs to an audience. The audience may be the general public or a relatively large sub-audience, such as children or young adults.
3 What is MP3 format and player It is a music player.These evolutions of music format that have helped consumers enjoy their tunes.
4 How does it work?This work as a compression system for music original size of the CD’sThe MP3 format helps reduce the number of bytes in a song without hurting the quality of the song's sound.In this a 32-megabyte (MB) song on a CD compresses down to about 3 MB
6 Digital Television What is meant by digital television? What is the term HDTV?
7 Advantages of DTVThe picture, even when displayed on a small TV, is better quality.A digital signal can support a higher resolution, so the picture will still look good when shown on a larger TV screen.It can support high-definition (HDTV) broadcasts.
8 Disadvantage of DTVAnalogue TVs can't decode and display digital signals.The cost of replacement
9 How do digital televisions work The Advanced Television Standards Committee (ATSC) has set voluntary standards for digital television.These standards include how sound and video are encoded and transmitted.Guidelines for different levels of quality.All of the digital standards are better in quality than analogue signals. HDTV standards are the top tier of all the digital signals.
10 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.Resolution - The lowest standard resolution (SDTV) will be about the same as analogue TV and will go up to 704 x 480 pixels. The highest HDTV resolution is 1920 x 1080 pixels.Frame rate - A set's frame rate describes how many times it creates a complete picture on the screen every second.
11 How the Internet is used to distribute digital TV. Modern ComputersDTV websites
12 Social issues for DTV1.What are the social issues associated with the particular IT development?The Same issuesReplacing Standalone TV2. How did the IT development emerge?Digital video cameras
13 People with interests in the industry. 3. Who are the stakeholders?People with interests in the industry.4. What are the advantages and disadvantages for the stakeholders?The advantagesThe Disadvantages
14 It effects the economy The environment Ergonomically DTV/HDTV 5. What feasible solutions can be applied to overcome these problems?Lower pricesSwitch from standalone TV to computers6. What is the social impact of the IT development on human life?It effects the economyThe environmentErgonomically DTV/HDTVHealth and psychological
15 Mobile TVMobile TVs are basically watching TV on portable devices such as mobile phones or laptop computer.Mobile TV on mobile phones now have the ability to chose specific TV programmes that we wants (thus pulling the video from the broadcasters) and watch it on their mobile phones as oppose to waiting for the broadcast time for it.
16 Social and ethical issues The further emphasis in providing entertainments in today’s society’s most personal device, the mobile phone, has lead to further isolations of individual from their society