120 Hz


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120 Hz

The frame rate of many modern flat panel TVs, which is designed to improve fast action and movies by providing smoother transitions from frame to frame. The TV doubles the common digital frame rate of 60 frames per second (fps) to 120 fps by duplicating each frame and displaying them all in one second. However, the duplicated frames are altered (interpolated) to become transition frames between the original frames and the following ones (see below).

Another advantage to 120 Hz is that it improves the conversion of movies shot at 24 fps to TVs that run at 60 fps (60 Hz). In order to fit 24 movie frames into 60 TV frames, the traditional telecine method generates uneven transitions because 24 does not divide evenly into 60. Telecine converts one frame into three frames and the next frame into two frames, called "3:2 pulldown." However, since 24 divides evenly into 120, every movie frame can be interpolated into five video frames, known as "5:5 pulldown." In addition, HDTVs have also been made with 48, 72 and 96 Hz frame rates because 24 divides evenly into these numbers. See 240 Hz, 480 Hz and telecine.

Duplicate and Smooth
By doubling the frame rate, a transition frame can be created between each two original frames.


5:5 Pulldown
Since 24 divides evenly into 120, each film frame shot at 24 fps can be converted into the same number of video frames. See telecine.
References in periodicals archive ?
What we know about the effects of flicker on reading, cognitive performance and brain activity primarily comes from comparisons between 100 or 120 Hz fluorescent lamps on magnetic ballasts and 20-40 kHz fluorescent lamps on electronic ballasts.
LED-backlit LCD TVs also continued to grow share, rising to 30% of total LCD TV unit shipments for the first time, while 120 Hz and higher frame rates accounted for just under a quarter of LCD units.
Didziausia adhezijos reiksme pasiekta tuomet, kai vibromechaninio apdirbimo daznis buvo 120 Hz, o signalo stiprumas 10 V ir sieke 2,91 MPa.
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I've programmed my unit to 120 Hz and now the signal doesn't bounce off the coupler.
Using a double frame rate of 120 Hz, the LCD module can be used by customers in equipment such as high-performance motion picture monitors to improve motion picture performance using black frame rate insertion, or interframe interpolation.
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It does far more than provide the LR4 low-pass and high-pass crossovers at 120 Hz (WM) and 1440 Hz (M-T).
Configured in 2- and 4-pole designs, power output is rated at 1/6 to 1/2 hp, and 1/10 to 1/3 hp with fundamental frequencies from 10 to 80 Hz and 20 to 120 Hz, respectively.
The weldabilities of polyamide 6 (PA-6), polyamide 6,6 (PA-6,6), 33 wt% glass-filled PA-6,6 (33-GF-PA-6,6), and amorphous polyamide (PA-A) are assessed through 120 Hz vibration welds.
The speed of three-phase motors can be controlled by adjusting the output frequency up to 120 Hz with either the built-in speed potentiometer or an external analog signal.