What is High definition in TV And Film
High definition TV is a sharper, clearer and gives a more realistic and life like feel to standard definition TV. This is due to higher resolution which means more information is added thats available to create the picture.
Common types of High definition are 720p which is also known as "HD Ready". This is a little bit more than double of standard defintion and 1080p which can also be recognized as "Full HD" which has more than 5 times as much picture information. if you want the best possible quality then 1080p is what you would look for.
SKIP TO 2;29 FOR SIDE BY SIDE COMPARISON OF STANDARD TV AND HD TV:
https://www.youtube.com/watch?v=HSgmNgQrlQw
What are the different aspect ratios for TV and film?
Which ones are better for TV progs and films?
Aspect Ratio is basically the proportion of the height and width of what image is being shown, in TV and Film 16:9 is the most common ratio used for high definition television as well as movies. 49:9 is a compromised aspect ratio tgat can be used to create a picture acceptable to 16:9 and 4:3 TVs.
What are the different types of audio and video signals?
An audio file format is the file that is used to store digital audio on a computer. the layout of the audio in the data is called Audio coding format. It can be uncompressed or compressed to make the overall file size smaller. There are quite a few different formats of audio
PCM - Also known as Pulse code modulation is the most used form of storing analog signals in a digital format. CD date is stored as PCM as are most file formats that are used in digital downloads.
AAC - Known as Advanced Audio Coding or more commonly recognised as Mp4 with advanced audio coding. AAC is a lossy compressed file format created to be the successor to mp3 and site such as iTunes store for its music downloads and youtube when it streams audio.
Mp3 - The most popular and most used lossy compressed file format which became an MPEG standard in 1993.
WMA - Windows Media Audio is Windows proprietary codec and comes in a lossy compressed version as well as a lossless compressed version.
WAV - waveform audio file which is another mainstream uncompressed format for music downloads developed by microsoft and IBM. One major fault of WAV is its lack of widespread support
Video Signal
RGB - RGB which is otherwise known as Reg Green and Blue is the most native format for computer graphics and video files. the signal is used inside traditional colour CRTs, Flat panel displays and video projectors. the RBG colours are merged and combined to recreate any possible colour, as well as grayscale images stretching from black to white.
S-Vid - An S video signal is also seen as a component video signal because the luma and chroma signals are seperated, however the C signal is derived by combining the CB and CR signal which lowers the quality of the colour channel abit.
Composite - The Luma and Chroma signals are mixed into a singal composite video signal for broadcast. the chroma signal is placed on a colour side frequency linked to the main luma frequency.
Storage - Digital footage is stored on hard disks or flash memory because its cheap, reliable and easy to transport as apose to a film reel.
Digital Filming - The process of capturing images digitally as apose to the historical use of film reels, film reels are seen as a negative. Allot of hollywood movies are shot digitally. Allot of hollywood films are also filmed on film reels still. Digital filming is shifting towards tapeless or file based work flows this trend has accelerated with increased capacity and low cost technology.
Terrestrial TV - Terrestrial television is a type of television broadcasting in which thetelevision signal is transmitted by radio waves to the TV receiver from aterrestrial (Earth based) transmitter, a television station, and received with an antenna.
Storage - Digital footage is stored on hard disks or flash memory because its cheap, reliable and easy to transport as apose to a film reel.
Digital Filming - The process of capturing images digitally as apose to the historical use of film reels, film reels are seen as a negative. Allot of hollywood movies are shot digitally. Allot of hollywood films are also filmed on film reels still. Digital filming is shifting towards tapeless or file based work flows this trend has accelerated with increased capacity and low cost technology.
Terrestrial TV - Terrestrial television is a type of television broadcasting in which thetelevision signal is transmitted by radio waves to the TV receiver from aterrestrial (Earth based) transmitter, a television station, and received with an antenna.
Recording TV - TV used to be recorded on blank tapes purchasable from pretty much anywhere and you would put it in your box and it would record onto the tape. However tech has progressed and now you can simply record it through Sky and Virgin, and other TV services which will allow you to record straight from your TV and be stored on a cloud.
Editing Software:
- Adobe Premier
- Sony Vegas
- Final Cut Pro
HD or SD? - "In a nutshell, the difference between high definition and standard definition images is the number of pixels contained in the image on display. HD images have more pixels per square inch than standard definition videos. Okay fine, but what does that really mean?
It means that HD images can show much finer detail than SD images. Here’s a simple analogy that should explain why.
Imagine you have a 3×5″ card, and you’ve been asked to draw a picture of a flower on it. You’re given your choice of two drawing tools: either a preschooler-type crayon (the really big ones) or a finely sharpened pencil. If you choose the crayon, your picture can’t possibly include as much detail as you could provide with the pencil drawing, because the crayon draws a much thicker line and you’re limited to the size of a 3×5″ card. And that’s just like the difference between SD and HD: the HD image shows finer detail because it “draws” the image with smaller, and more, pixels than an SD image can."
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