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Understanding Video Technology Week 2
Today’s Aims • Present you with an overview of international Video Standards • Review last week’s session questions • Set this week’s homework • Review blog progress
Outcomes • You will be able to recall, name, describe and evaluate international video standards and their technical components • You will gain experience in secondary research and group presentation • You will practice ICT through effective blogging and presentation design
Understanding Video Technology Week 2
Reminders • Get your WordPress blog sorted ASAP
• My blog is gctvfilm.wordpress.com
• Homework must be in by following Thursday 12 noon
• Homework submitted late will not be marked.. This will directly affect your final grade. A whole week for 5 questions is more than enough time.
• Email your answers to [email protected]
• Subject – (Your Name) Week 2 UVT Answers
Understanding Video Technology Week 2
Week One 1. Explain the purpose of an ND filter. 2. Why does a faster shu:er make movement more detailed? 3. What does the zebra do? 4. Explain why you need to carry out a White Balance. 5. Why is FireWire handy on a DV Camera?
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Display Aspect Ratio (DAR)
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
4:3
Understanding Video Technology Week 2 Video Standards
4:3
4 units
3 units
Understanding Video Technology Week 2 Video Standards
16:9
16 Units
9 units
Understanding Video Technology Week 2 Video Standards
16:9 and 4:3 together
Understanding Video Technology Week 2 Video Standards
16:9 and 4:3 together
4:3
16:9
Assuming 16:9 HD is the video standard we’re working to.
Understanding Video Technology Week 2 Video Standards
16:9 and 4:3 together
Option 1: Pillarboxing
Understanding Video Technology Week 2 Video Standards
16:9 and 4:3 together
Option 2: Zooming
Understanding Video Technology Week 2 Video Standards
16:9 and 4:3 together
Option 3: Stretching
Understanding Video Technology Week 2 Video Standards
16:9 and 4:3 together
Option 4: Pillarboxing with blur.
Understanding Video Technology Week 2 Video Standards
PAL
Understanding Video Technology Week 2 Video Standards
PAL
SD
Phase Alternating Line European for standard definition 576i in 4:3
576 lines
Understanding Video Technology Week 2 Video Standards
NTSC
Understanding Video Technology Week 2 Video Standards
NTSC
SD
• National Television System Committee • US for standard definition • 480i in 4:3
480 lines
Understanding Video Technology Week 2 Video Standards
HD
Understanding Video Technology Week 2 Video Standards
HD
16 Units
9 units
• Always in 16:9 • Standards the same worldwide • 720p or 1080i/p
Understanding Video Technology Week 2 Video Standards
HD
?
720 pixels
• Always in 16:9 • Standards the same worldwide • 720p or 1080i/p
1080 pixels
?
Understanding Video Technology Week 2 Video Standards
i and p
Understanding Video Technology Week 2 Video Standards
i = interlaced
p= progressive
Understanding Video Technology Week 2 Video Standards
Interlaced
Understanding Video Technology Week 2 Video Standards
Interlaced
At 25 fps interlaced video is updated 50 half frames per second That is 50i
Understanding Video Technology Week 2 Video Standards
Interlaced
• Only good for TV • Will produce combing on LCD monitors • Renders an image all odd lines then all even lines • Makes things look VIDEO and not FILMIC • 1080 50i is an HD standard for European TV
Understanding Video Technology Week 2 Video Standards
Interlaced
• Combing • Jaggies • Problem occurs when Interlaced footage is shown on LCD screens and monitors
Understanding Video Technology Week 2 Video Standards
Deinterlacing
• Process of blending the odd and even fields of an interlaced video. • All NLEs have an option to deinterlace
Understanding Video Technology Week 2 Video Standards
Deinterlacing
• Gets rid of jaggies (combing) • Enables interlaced footage to be used on computer monitors • Deinterlaced footage usually appears more filmic and less home videoey.
Understanding Video Technology Week 2 Video Standards
Progressive
Understanding Video Technology Week 2 Video Standards
Progressive
• All films are progressive – one photo after another. • 720p is an HD standard used in broadcast • A progressive video records and displays the entire frame at once
• 1080p is the best available HD home format
Understanding Video Technology Week 2 Video Standards
Frame Rates
Understanding Video Technology Week 2 Video Standards
Frame Rates UK
PAL DV = 25fps
720p25 = 25 prog fps
1080i50 = 50 inter fps
1080p50 = 50 prog fps
Frame Rates US
NTSC DV = 30fps
720p30 = 30 prog fps
1080i60 = 60 inter fps
1080p60 = 60 prog fps
Worldwide Film = 24fps
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio (PAR)
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
HD/Computers 1:1
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
HD/Computers 1:1 Square Pixel
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
HD/Computers 1:1 Square Pixel
PAL TV 1:107
NTSC TV 1:0.9 http://www.youtube.com/watch?v=ke9QzHGhF6w
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
One small HD complication
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
One small HD complication
1080i has 2 standards:
1920x1080 – THE standard
1440x1080 – HDV
Both have a 16:9 DAR
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
One small HD complication
1080i has 2 standards:
1920x1080 – THE standard
1440x1080 – HDV
Both have a 16:9 DAR but the 1440’s pixels are stretched out.
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
1440x1080 with square pixels
This is not 16:9 DAR This is 16:9 DAR
1440x1080 with rectangular pixels
Understanding Video Technology Week 2 Video Standards
Pixel Aspect Ratio
HD/Computers 1:1 Square Pixel
PAL TV 1:107
NTSC TV 1:0.9
HDV 1:1.33
Understanding Video Technology Week 2 Video Standards
Future HD
4320 pixels
Understanding Video Technology Week 2 Video Standards
Research and Present
• Research another Video standard and give me its technical specifications (it’s used in France). • 1080i or 720p – which is best? • Differentiate Display Aspect Ratio and Pixel Aspect Ratio • Explain deinterlacing and why we need to do it • How does NTSC technically differ from PAL and how does the UK show NTSC programmes? • Tell us all why progressive will eventually win NB – cite your sources – Wikipedia is OK but use specialist forums and resource sites. Give us all a good show.
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards
Understanding Video Technology Week 2 Video Standards