On 2/25/2015 2:30 AM, AndyW wrote:
On 24/02/2015 17:00, Jerry Stuckle wrote:

But you forget compression. For instance, unless there is a scene
change, the vast majority of a television picture does not change from
frame to frame. Even if the camera moves, the picture shifts but
doesn't change all that much. Why waste all of that bandwidth resending
information the receiver already has?

Which is why, on cheaper televisions, the picture tesselates when
showing random images such as rain, fire, waterfalls etc.
The true test of a quality television is to watch a waterfall or flames
and see it pin-sharp.
Cheaper TVs use cheap lower-powered decoding systems and for complex
images they do not have enough time to fully decode the image before the
next frame arrives.

Andy


Not really true, at least in the United States. All TV's here use the
same (proprietary) chipsets to decompress the digital signal. However,
it makes a huge difference on the resolution being used, i.e. 720P,
1080P, 1080I, UHD... The difference is in what happens after the signal
is decompressed.

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