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
Networking
  • local area network (LAN)

    A local area network (LAN) is a group of computers and peripheral devices that are connected together within a distinct ...

  • TCP/IP

    TCP/IP stands for Transmission Control Protocol/Internet Protocol and is a suite of communication protocols used to interconnect ...

  • firewall as a service (FWaaS)

    Firewall as a service (FWaaS), also known as a cloud firewall, is a service that provides cloud-based network traffic analysis ...

Security
  • identity management (ID management)

    Identity management (ID management) is the organizational process for ensuring individuals have the appropriate access to ...

  • fraud detection

    Fraud detection is a set of activities undertaken to prevent money or property from being obtained through false pretenses.

  • single sign-on (SSO)

    Single sign-on (SSO) is a session and user authentication service that permits a user to use one set of login credentials -- for ...

CIO
  • project scope

    Project scope is the part of project planning that involves determining and documenting a list of specific project goals, ...

  • core competencies

    For any organization, its core competencies refer to the capabilities, knowledge, skills and resources that constitute its '...

  • change management

    Change management is a systematic approach to dealing with the transition or transformation of an organization's goals, processes...

HRSoftware
  • recruitment management system (RMS)

    A recruitment management system (RMS) is a set of tools designed to manage the employee recruiting and hiring process. It might ...

  • core HR (core human resources)

    Core HR (core human resources) is an umbrella term that refers to the basic tasks and functions of an HR department as it manages...

  • HR service delivery

    HR service delivery is a term used to explain how an organization's human resources department offers services to and interacts ...

Customer Experience
  • martech (marketing technology)

    Martech (marketing technology) refers to the integration of software tools, platforms, and applications designed to streamline ...

  • transactional marketing

    Transactional marketing is a business strategy that focuses on single, point-of-sale transactions.

  • customer profiling

    Customer profiling is the detailed and systematic process of constructing a clear portrait of a company's ideal customer by ...

Close