60Hz vs. 120Hz vs. 240Hz vs. 480Hz: LCD TV Refresh Rates
The HDTV refresh rate produces a non-repetitive transition of images
between the frames by calculating the image between the frames and inserting them
through frame interpolation methodology
To understand Refresh Rate specifications, we first have to look at some of the
Hertz (Hz) refers to the number of video frames displayed on a TV each second. Most
video content is sent to the TV at 60Hz. To clarify, a DVD player or cable box is
sending 60 video frames to the TV each second.
So, how does an LCD TV come up with 120, 240, or 480 frames per second. With 120Hz,
the answer is the same for most TVs. The TV simply repeats every frame twice. You
see each of the 60 video frames twice.
With 240Hz, LED lighting added the ability to rapidly turn LED lights on and off.
This allowed LCD manufacturers to turn off the LED lights briefly between each video
frame. They claimed that 120 video frames plus 120 black fields equaled 240. Other
manufacturers doubled 120 by duplicating each of the 60 original video frames four
times, creating 240 frames per second. These manufacturers frequently accused their
counterparts of not using a true 240Hz.
480Hz is a similar story. Manufacturers are using the 'black frame insertion' with
full 240Hz processing. 240 full video frames with a black field between each full
frame. Most companies are doing this in some of their 2010 models but with different
stories. Sony calls it 240Hz Pro, LG and other manufacturers are calling it 480Hz,
but the technique is the same regardless.
In terms of performance, critics tend to agree that there is a visible improvement
from 60Hz to 120Hz. Keep in mind though, that when the first 120Hz TVs came out,
the increased frame rates were coupled with better video processing which contributes
greatly to the reduction of motion blur and artifacts. The differences from 120Hz
to 240Hz are arguably less significant. The effects of 'black frame insertion' on
240Hz are still being debated
With the ever changing Technology when it comes to Home Theater Electronics, it
takes a company like us to ensure you get the most out of your purchase. When you
purchase a Surround Sound Home Theater System for your Blu-Ray DVD Player or any
type of LED LCD Plasma DLP HDTV from MODIA we are here to help you get the prefect
sound quality for your Home Theater. You can Call, E-mail, or Chat and one of our
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