task 4

1. Task 4
Laura Hodgson & Hannah McDonagh

2. Digital video hannah
Digital video is a representation of moving visual images in the form of digital data. This is in contrast to analog video,
which represents moving visual images with analog signals.
There are many advantages and disadvantages of digital video, one of the main advantages would be that the quality
of the image it produces is very clean and clear. This is all due to the higher resolution image range and frame rate
speed. Another advantage of digital video is that is has a faster distribution, this means that once a video is recorded
it can be sent out to the internet very fast so digital video can be very convenient.
There can also be very many disadvantages also; one disadvantage would be that digital video and recording it itself
can be very expensive, it can also be very complicated to use and to record because the camera has many
complicated buttons and ways to use it which can be very hard to use.

3. High definition ( HD ) hannah
High-definition television (HDTV) is a television system providing an image resolution that is of
substantially higher resolution than that of standard-definition television.
It took a long time for the UK to get HD. While we were launching our digital TV services, the
Americans were already up-and-running with their HD systems. Because of a lack of bandwidth, and
the number of existing services it took until 2010 for HD to launch on Freeview in the UK, and then
with a very modest number of channels. Initially, the BBC just had BBC HD but later this was joined
by a simulcast of BBC One in high definition. In 2013, the BBC shut BBC HD and replaced it with
BBC Two HD. Sky, of course, has been a pioneer in HD from the start. Sport has driven this, along
with movies and there are now 60 HD channels on Sky's platform.

4. High Definition (HD) hannah
As frustrating as it was to have such a long wait for HD to arrive in the UK, it did allow us time to perfect the service. For
example, Freeview HD uses MPEG-4 and DVB-T2 to transmit video. These are far more efficient than the American system
of ATSC and MPEG-2, so we are able to house far more HD channels over the air, and mix them with the older MPEG-2
standard definition broadcasts. As a guide, a 6MHz US TV frequency block allows for about 20Mbit/s of data, while in DVB-
T2 it's possible to get 40Mbit/s in our 8MHz channels.
It's interesting to note that two new systems are in the works too, 1024-QAM would increase the bandwidth on a multiplex to
50Mbit/s, and 2048-QAM would allow another 25 per cent increase over that. It's uncertain if these systems will make it to
Freeview, as they would need new decoder hardware, but it's likely that by the time a decision is made about 4K on
Freeview, it will be possible to use them to increase space further. This combined with the new h.265 video compression
used for 4K delivery, could make ultra high definition a possibility over the air.

5. 3D( Third dimension ) Laura
3D means three-dimensional, for example something that has width, height and
depth (length). Humans are able to see objects just by looking at them because
we have 3D perception. In order to represent 3D on a flat (2D) surface such as a
display screen, it's recommended to use as many of the perception tools as
possible e.g. Stereoscopic vision, accommodation, parallax, size familiarity & aerial
perspective for the best performance for the audience.
In 1894 William Friese-Greene, a British film producer, had an idea for a 3D movie
process using two films projected side by side on a screen while the audience
looks through a stereoscope to converge the two images and create a 3D
production.Though the earliest theatrical presentations were done with this
system, most 3D films from the 1950s and 1980s were originally shown polarized
meaning that to create the illusion of three-dimensional images the polarized
lenses restrict the light that reaches each eye.

6. 3D( Third dimension ) Laura
Nowadays, technology has advanced and you are now able to experience 3D TVs which often need
more storage than 2D TVs,because 3D programmes take up a lot of space to store. An example of a
3D film that was in cinemas was Gravity, this was one of the top 3D films at the time because it
included scenes that had things pop out at them to make the audience feel like they were there in
space.
One advantage of 3D is that the image jumps out so it makes it more realistic for the audience as
they feel as if they are in the film and feeling the same actions as the characters. But one
disadvantage of 3D is that it is expensive to produce and can cause headaches because it can strain
the eyes.

7. The internet - Hannah and Laura
•The internet is now the most important thing in people’s daily life. The uses of the internet are helpful with
helping people easily get information and entertainment whether it be for pleasure such as browsing through
social media or googling what today’s weather is. However, film and television use the internet in order to
promote their new film or series. They use advertisements such as trailers and release them on social media
accounts or youtube which will attract their target audience as most 14-25 year olds use social media and have
accounts on instagram and twitter. However, one negative about the internet is that people may spoil the film
for others by releasing comments on scenes of the film on social media or upload those spoiler scenes. For
example, people may watch spoilers of an important scene on YouTube or/and Instagram. Apart from this
people tend to also upload films and television series illegally online on pirated sites which is also known as
pirating and these films and television series are uploaded onto websites such as ‘123movies’, ‘showbox’ and
‘putlocker’. These sights will show the newest movies sometimes before they are released in cinemas. For
example, the film ‘Get Out’ which was shown in cinemas in March was on showbox at the same time available
for people to watch for no cost.

8. The internet - Hannah and Laura
This is illegal as the money paid at cinema to watch a film goes straight to the production however,
when watching it for free online, the production don’t make enough money as expected.
Broadcasts such as Sky have applications which allow their viewers to catch up or watch television
series or films using the internet. For example BBC iPlayer can be used on other devices such
your tablets or mobile devices using the internet. These applications or websites allow their
audiences to sign up for subscriptions to stream their favourite films or television shows by paying
a small fee monthly using the internet. Another disadvantage is that the internet is not free as
people pay for their broadband. Also sometimes there may be a problem with internet service as
signals can get poor and may not be as strong.

9. Advantages & Disadvantages of the internet
There are many advantages and disadvantages of the internet. Some of the advantages are that there are
so many things you can do; you can search almost anything on the internet, anything you want to know or
see is pretty much there. You are able to order things online, you can bank online, you can communicate
with people from anywhere in the world and so much more but the internet also has a very dark side to it
including many disadvantages.
The internet can be a very dangerous place. The internet can bring you many things, but the
disadvantages of these can actually be very dangerous. These are a range of things from hackers,
stalkers, scammers and much more. For example, you are able to communicate with almost anybody in
the world if you wanted to, but do you really know who is behind the other side of the computer screen.
Another example could be that you are also able to order anything online if you wanted to, but doing this
means that you would have to put your bank details online and yet again not knowing who's on the other
end you could potentially be a victim of fraud.

10. On Demand hannah
Video on demand is an interactive TV technology that allows people to view programmes in real time or download
programmes to view them later on. This service can be delivered over the internet to computers and laptops, most
smartphones and advanced digital media devices e.g. Smart TV’s.
The video on demand concept is not new. The first commercial video on demand service was launched in the early 90’s in
Hong Kong. In the United States, Oceanic Cable of Hawaii was the first to offer it back in 2000. Today video on demand is
offered by many different providers, mostly those who also offer triple play services. Video on demand can and is being
using in educational institutions and other professional environments.
Video on demand has historically suffered from lack of available network bandwidth, resulting in bottlenecks and long
download times. Video on demand can work well over a wide geographic region or on a satellite based network as long as
the demand for programming is modest. However, when large numbers of customers demand multiple programs on a
continuous basis, the total amount of data involved can overwhelm network resources.