Progressive Scan
What is Progressive Scanning in HDTVs?
Progressive or noninterlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to the interlacing used in traditional television systems where only the odd lines, then the even lines of each frame (each image now called a field) are drawn alternately.
Advantages of progressive scan
- Higher vertical resolution than interlaced video with the same frame rate.
- Absence of visual artifacts associated with interlaced video of the same line rate, such as interline twitter.
- No necessity in intentional blurring (sometimes referred to as anti-aliasing) of video to reduce interline twitter and eye strain.
- Offers much better results for scaling to higher resolutions than equivalent interlaced video, such as upconverting 480p to display on a 1080p HDTV.
- Frames have no interlace artifacts and can be used as still photos.
In the case of most media such as DVD movies and video games, the video is blurred during the authoring process itself to mask flicker artifacts when used on interlace displays. As a consequence, recovering the sharpness of the original video is impossible when the video is viewed progressively. An excellent, but rarely employed countermeasure to this is when display hardware and video games come equipped with options to blur the video at will, or to keep it at its original sharpness. This allows the viewer to achieve the desired image sharpness with both interlaced and progressive displays. An example of a video game with such a feature is Super Smash Bros Brawl, where a "Deflicker" option exists. Ideally it would be turned on when played on an interlaced display to reduce interline twitter, and off when played on a progressive display for maximum image clarity.
Scaling works well with full frames, therefore interlaced video must be deinterlaced before it is scaled. Deinterlacing can result in severe "combing" artifacts.
Disadvantages of progressive scan
-
A disadvantage of progressive scan is that it requires higher bandwidth than interlaced video that has the same frame size and vertical refresh rate.
 |
EZ Cheats Video Game Cheats, Tips and Secrets For Nintendo Wii & DS 2nd Edition List Price: $2.99 Average Rating:   |
|
"Cheats Unlimited are the specialists when it comes to video game cheats, tips and walkthrough guides. Fronted by the glamorous and gorgeous Cheatmistress, Cheats Unlimited has helped over seven million gamers worldwide over the last 12 years. Through phone lines, fax machines, the Web and WAP sites and now eBooks, we have been there for gamers when they've needed us the most.With EZ Cheats: Video Game Cheats, Tips and Secrets: Nintendo Wii & DS, we aim to help you unlock the game's full potential with a series of tips, cheat codes, secrets and unlocks. Whether you want to find out how to spawn specific vehicles, learn how to open up harder difficulty settings, or discover sneaky ways to earn additional in-game currency, we have the answers. EZ Cheats are compiled by expert gamers who are here to help you get the most out of your games.EZ Cheats: Video Game Cheats, Tips and Secrets: For Nintendo Wii & DS covers all of the top titles, including Mario Kart, The Legend of Zelda: Twilight Princess, Mario and Sonic at the Olympic Games, Wii Fit, Wii Sports, Super Smash Bros. Brawl and Super Mario Galaxy amongst many more top Wii titles. For DS there's The Legend of Zelda: Spirit Tracks, New Super Mario Bros., Brain Training, Nintendogs, Animal Crossing, Scribblenauts, Mario and Luigi: Bowser's Inside Story, Grand Theft Auto: Chinatown Wars and Professor Layton, amongst many many more quality DS titles. Consoles covered: Nintendo Wii & Nintendo DS42 All-Time Classics, Advance Wars: Dual Strike, Animal Crossing: Wild World, Battalion Wars 2,Ben 10: Alien Force – Vilgax Attacks, Bomberman DS, Bully: Scholarship Edition, Burnout Legends, Bust A Move, Call of Duty 3, Castlevania: Dawn of Sorrow, Destroy All Humans!: Big Willy Unleashed, Dr Kawashima's Brain Training, DragonBall Z: Supersonic Warriors 2, Final Fantasy IV, Ghostbusters: The Video Game, Grand Theft Auto: Chinatown Wars, Guitar Hero 5, Harry Potter and the Goblet of Fire, House of the Dead: Overkill, Indiana Jones and the Staff of Kings, Kingdom Hearts 358/2 Days, Lego Batman, Lego Indiana Jones 2: The Adventure Continues, Lego Star Wars: The Complete Saga, Lost In Blue, Manhunt 2, Mario and Luigi: Bowser's Inside Story, Mario and Luigi: Partners in Time, Mario and Sonic at the Olympic Winter Games, Mario Kart Wii, Mario Strikers: Charged Football, Marvel: Ultimate Alliance 2, Metroid Prime 3: Corruption, Metroid Prime: Hunters, Monster Hunter Tri (3), Need for Speed: Underground 2, New Super Mario Bros, Nintendogs: Chihuahua and Friends, Nintendogs: Dachshund and Friends, Nintendogs: Shiba and Friends, Pokemon Diamond and Pearl, Pokemon Mystery Dungeon: Explorers of Darkness, Pokemon Mystery Dungeon: Explorers of Time,Pokemon Platinum, Professor Layton and The Curious Village, Professor Layton and The Diabolical Box (Pandora's Box), Quantum of Solace, Rayman: Raving Rabbids, Red Steel 2, Resident Evil: Deadly Silence, Ridge Racer DS, Rock Band, Scribblenauts, Silent Hill: Shattered Memories, Sonic Unleashed, Spider-man: Friend or Foe, Star Wars Episode III: Revenge of the Sith, Star Wars: The Force Unleashed, Super Mario 64 DS, Super Mario Galaxy, Super Monkey Ball: Banana Blitz, Super Smash Bros. Brawl, Tatsunoko vs Capcom: Ultimate All-Stars,The Conduit, The Legend of Zelda: Phantom Hourglass, The Legend of Zelda: Spirit Tracks,The Legend of Zelda: Twilight Princess, The Urbz: Sims in the City, Tiger Woods PGA Tour 10,Tom Clancy's Splinter Cell: Chaos Theory, Transformers: The Game, Trauma Center: Under the Knife, Ultimate Spider-Man, WALL-E, Wario Ware: Touched!, Wii Fit, Wii Sports, Wii Sports Resort, WWE Smackdown vs Raw 2010, X-Men: The Official Game, Yoshi's Touch and Go,Yu-Gi-Oh!: Nightmare Troubadour, Zoo Keeper. |
