BroadcastingBroadcasting MediaMediaDigitalDigital Radio and TelevisionRadio and Television

Introduction to Introduction to Broadcasting MediaBroadcasting Media Broadcasting - this Broadcasting - this is the is the

distribution of audio distribution of audio and/or video signals and/or video signals which transmit programs which transmit programs to an audience. The to an audience. The audience may be the audience may be the general public or a general public or a relatively large sub-relatively large sub-audience, such as audience, such as children or young adults.children or young adults.

What is MP3 format and What is MP3 format and playerplayer It is a music It is a music

player.player.

These evolutions These evolutions of music format of music format that have helped that have helped consumers enjoy consumers enjoy their tunes.their tunes.

How does it work?How does it work? This work as a compression system for music This work as a compression system for music

original size of the CD’soriginal size of the CD’s The MP3 format helps reduce the number of The MP3 format helps reduce the number of

bytes in a song without hurting the quality of bytes in a song without hurting the quality of the song's sound.the song's sound.

In this a 32-megabyte (MB) song on a CD In this a 32-megabyte (MB) song on a CD compresses down to about 3 MBcompresses down to about 3 MB

Digital Television Digital Television What is meant by digital television?What is meant by digital television? What is the term HDTV?What is the term HDTV?

Advantages of DTVAdvantages of DTV

The picture, even when The picture, even when displayed on a small TV, is displayed on a small TV, is better quality.better quality.

A digital signal can support A digital signal can support a higher resolution, so the a higher resolution, so the picture will still look good picture will still look good when shown on a larger TV when shown on a larger TV screen.screen.

It can support high-It can support high-definition (HDTV) definition (HDTV) broadcasts.broadcasts.

Disadvantage of DTVDisadvantage of DTV

Analogue TVs can't decode and display Analogue TVs can't decode and display digital signals. digital signals.

The cost of replacementThe cost of replacement

How do digital televisions work How do digital televisions work The Advanced Television Standards Committee (ATSC) The Advanced Television Standards Committee (ATSC)

has set voluntary standards for digital television. has set voluntary standards for digital television. These standards include how sound and video are These standards include how sound and video are

encoded and transmitted. encoded and transmitted. Guidelines for different levels of quality. Guidelines for different levels of quality.

All of the digital standards are better in quality than analogue All of the digital standards are better in quality than analogue signals. HDTV standards are the top tier of all the digital signals.signals. HDTV standards are the top tier of all the digital signals.

Aspect ratio - Standard television has a 4:3 aspect Aspect ratio - Standard television has a 4:3 aspect ratio -- it is four units wide by three units high. HDTV ratio -- it is four units wide by three units high. HDTV has a 16:9 aspect ratio.has a 16:9 aspect ratio.

Resolution - The lowest standard resolution (SDTV) Resolution - The lowest standard resolution (SDTV) will be about the same as analogue TV and will go will be about the same as analogue TV and will go up to 704 x 480 pixels. The highest HDTV resolution up to 704 x 480 pixels. The highest HDTV resolution is 1920 x 1080 pixels. is 1920 x 1080 pixels.

Frame rate - A set's frame rate describes how many Frame rate - A set's frame rate describes how many times it creates a complete picture on the screen times it creates a complete picture on the screen every second. every second.

How the Internet is used to distribute How the Internet is used to distribute digital TV.digital TV.

Modern Computers

DTV websites

Social issues for DTVSocial issues for DTV

1.What are the social issues associated 1.What are the social issues associated with the particular IT development?with the particular IT development?

The Same issuesThe Same issuesReplacing Standalone TVReplacing Standalone TV

2. How did the IT development emerge?2. How did the IT development emerge?Digital video camerasDigital video cameras

33. Who are the stakeholders?. Who are the stakeholders?

People with interests in the industry.People with interests in the industry.

4. What are the advantages and disadvantages 4. What are the advantages and disadvantages for the stakeholders?for the stakeholders?

The advantagesThe advantages

The DisadvantagesThe Disadvantages

5. What feasible solutions can be applied to overcome these 5. What feasible solutions can be applied to overcome these problems?problems?

Lower pricesLower prices

Switch from standalone TV to computersSwitch from standalone TV to computers

6. What is the social impact of the IT development on human life?

It effects the economy

The environmentThe environment

Ergonomically DTV/HDTVErgonomically DTV/HDTV

Health and psychologicalHealth and psychological

Mobile TVMobile TV

Mobile TVs are basically watching TV on portable Mobile TVs are basically watching TV on portable devices such as mobile phones or laptop computer. devices such as mobile phones or laptop computer.

Mobile TV on mobile phones now have the ability to Mobile TV on mobile phones now have the ability to chose specific TV programmes that we wants (thus chose specific TV programmes that we wants (thus pulling the video from the broadcasters) and watch it pulling the video from the broadcasters) and watch it on their mobile phones as oppose to waiting for the on their mobile phones as oppose to waiting for the broadcast time for it. broadcast time for it.

Social and ethical issuesSocial and ethical issues

The further emphasis in providing The further emphasis in providing entertainments in today’s society’s most entertainments in today’s society’s most personal device, the mobile phone, has personal device, the mobile phone, has lead to further isolations of individual lead to further isolations of individual from their society from their society

~The End~~The End~

By: Danny, Siti, Nasim and kenBy: Danny, Siti, Nasim and ken