Browse Definitions :
Definition

cinema pulldown 3:2 (telecine)

Cinema pulldown 3:2 is an algorithm for matching the slower frame rate of film to the faster refresh rate of a 60 Hz television. Cinema pulldown is also called telecine or 3:2 pulldown. 

The standard frame rate for film is 24 frames per second (fps). This means that if you go to the movies, your eyes are shown 24 frames of film each second. 

Many current and older televisions have a fixed refresh rate of 60Hz.  This means that if you are watching such a TV, your eyes are shown the digital equivalent of 60 frames each second. Always.  

When you are watching a film on a 60Hz television, software in the TV or DVD player detects the incoming signal and fills in the missing 36 frames by repeating frames that your eye has already seen.

Ideally, each frame would be repeated the same number of times. The problem is that 24 doesn't divide evenly into 60.  If each frame is repeated twice, that's only 48 frames per second. There will still be 12 missing frames. That's where the 3:2 ratio comes in. To ensure that there will consistently be 60 frames per second, the first frame is displayed on the TV screen 3 times and the second frame is displayed 2 times. The following frame is repeated 3 times, the next one 2 times, etc. throughout the film.

Because alternating frames are not repeated in a consistent manner, however, the picture on the television screen is actually a little jittery. In TV-vendor lingo, this is called judder.  Most of us don't notice judder because a second goes by very quickly and our brains adjust to it.

Vendors who are producing televisions for 3-D viewing, need to alternate frames in a consistent manner to get the best possible picture.  One way for them to do this is increase the refresh rate on newer LCD televisions to 120Hz.  Because 24 divides evenly into 120, alternating frames can be repeated in a consistent manner (5 times each).  This consistency produces a more accurate picture.  

See also: soap opera effect, Fast Guide to Flant Panel TV

Learn more about 3:2 pulldown:

ProjectorPeople.com explains more about Cinema Pulldown and reverse 3:2 pulldown.

This was last updated in December 2010

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

  • privacy compliance

    Privacy compliance is a company's accordance with established personal information protection guidelines, specifications or ...

  • data governance policy

    A data governance policy is a documented set of guidelines for ensuring that an organization's data and information assets are ...

SearchSecurity

  • asymmetric cryptography (public key cryptography)

    Asymmetric cryptography, also known as public-key cryptography, is a process that uses a pair of related keys -- one public key ...

  • Evil Corp

    Evil Corp is an international cybercrime network that uses malicious software to steal money from its victims' bank accounts.

  • Plundervolt

    Plundervolt is a method of hacking that involves depriving an Intel chip of power so that processing errors occur.

SearchHealthIT

  • telemedicine (telehealth)

    Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the ...

  • Project Nightingale

    Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United ...

  • medical practice management (MPM) software

    Medical practice management (MPM) software is a collection of computerized services used by healthcare professionals and ...

SearchDisasterRecovery

SearchStorage

  • 3D NAND flash

    3D NAND is a type of non-volatile flash memory in which the memory cells are stacked vertically in multiple layers.

  • M.2 SSD

    An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification written for internally mounted storage...

  • RAID (redundant array of independent disks)

    RAID (redundant array of independent disks) is a way of storing the same data in different places on multiple hard disks or ...

Close