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.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

  • audit program (audit plan)

    An audit program, also called an audit plan, is an action plan that documents what procedures an auditor will follow to validate ...

SearchSecurity

  • computer worm

    A computer worm is a type of malicious software program whose primary function is to infect other computers while remaining ...

  • black hat

    Black hat refers to a hacker who breaks into a computer system or network with malicious intent.

  • copyright

    Copyright is a legal term describing ownership of control of the rights to the use and distribution of certain works of creative ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

SearchSolidStateStorage

  • RRAM or ReRAM (resistive RAM)

    RRAM or ReRAM (resistive random access memory) is a form of nonvolatile storage that operates by changing the resistance of a ...

  • JEDEC

    JEDEC is a global industry group that develops open standards for microelectronics.

  • 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...

SearchCloudStorage

  • Google Cloud Storage

    Google Cloud Storage is an enterprise public cloud storage platform that can house large unstructured data sets.

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

Close