Progressive vs. Interlaced Scan

 

- The Camera - "Progressive vs. Interlaced Scan"

What is progressive and interlaced scan? A progressive scan draws a sequential line that fills a single video frame. It ensures that each frame is filled with a complete image. Interlaced scan, in contrast, displays every other line of an image rather than the whole thing. 



Why does it matter? Interlaced scanning saves bandwidth by cutting down half of a full image. This allowed for older TVs to refresh at a better pace, allowing for smoother transmissions. Interlaced, however, can also cause artifacts which reduce the quality when there is movement on screen compared to progressive scanning. One example of scans being used is during sports broadcasts, in which 720p is used rather than 1080i in order to have better movement in the images.


Why should we know the difference? 
When figuring out progressive vs. interlaced, it is important to notice the difference in the image between the two. Progressive scanning results in smoother, higher quality images with reduced artifacts. Interlaced scanning, on the other hand, may result in artifacts or combing especially when there is movement on the screen, but it is ideal for saving on bandwidth.

Bouncing Ball Experiment

Frame rate is important to understand because it affects how smooth your video may run. Lower frame rate results in less frames being shown per second, whilst high frame rate results in more frames being shown. Higher frame rate is also better used when filming in slow-motion, as more frames are pertained to the slow-motion.


Comments

Post a Comment

Popular posts from this blog

On The Spot Post-Production

Image
On The Spot - Post Production This was definitely the most time-consuming project out of all of them this year. Besides that, however, it was a lot of fun getting to film things outside of the classroom and put some own creative spin on my own work.  Choosing The Right Music I was inspired by a few things from the videos shown in class. For one thing, I learned just how important sound is as the actual video itself. The sound is able to captivate the audience by following a certain tone that is easy for the viewer to understand. This was the hardest thing for me to do as it required a lot of thinking on my part in order to captivate this same feeling- I couldn't just slap any random music and call it a day. The search for the right kind of music was the most annoying part of this project for me because of this. I would play some songs found on bensound over my project, but none of them worked out. A silly thing I found out was that Jazz songs actually fitted well in the background
Read more

The Camera - Aperture & Iris

Image
  - The Camera - "Aperture & Iris"                What is aperture?   It is essentially the "pupil" of a camera lens, in which the lens "open" and can be shrunk or enlarged in order to allow more or less light into the camera sensor.                  How does it affect exposure?   It changes the amount of light that is able to reach the camera sensor. Large, wide openings of the aperture will result in brighter photos because more light is passed. A smaller, tight opening of the aperture will result in darker photos because less light is passed. How does it affect depth of field?  A large aperture will yield greater background blur, whilst a small aperture will yield little background blur. How do you pick the right aperture for your scene?  When capturing photos in bright/dark environments, a smaller/larger aperture may want to be used since aperture affects exposure. This allows for less light on sunny photos, or more light on photos taken at night.
Read more

EQ

Image
  - Sound Design - "Equalization & Microphone Types" What is the difference between dynamic and condenser microphones?   I n terms of sensitivity, condenser mics are more sensitive compared to dynamic mics. Dynamic mics also require no power, while condenser mics require a battery or phantom. What is directionality?   It is the "pickup pattern" of a microphone in which your microphone can pick up sound from a particular direction. There are three basic types such as omnidirectional, cardioid, and super-cardioid. Omnidirectional can pick up sounds equally from all directions, while cardioid is more sensitive to sounds from the front.  Why would you use a lavalier? A shotgun? A dynamic?   It all depends on the scene's situation. Lavaliers and shotguns are better used when the subject needs their hands free in the shot for things such as hand movements and presentations. Shotgun microphones are also ideal for scenes in which the subject is farther away from you
Read more