Laura Hodgson & Hannah McDonagh Task 4 Laura Hodgson & Hannah McDonagh

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.

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. High definition ( HD ) hannah 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.

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.

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.

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.

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.

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.

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.

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.