user3931: I have Toshiba 29PB200ZE (just purchased). Now the problem is it displays pixels with very blur effect. Reason is that the Cable operators in India (using Standard Channel Broadcasting) broadcasting 720p resolution output. As I have 1080p HDTV it does not displays output properly. Means that tiering the pixels.
Is there any converter available that converts 720p output from Channel (set top box) to 1080p so that I can view output properly.
If I go for HD Channels then issue will not be arised. But as HD channels have very high price range so could not afford them.
Edit: I am using 3 pin (red, yellow and white) cable which connects Set Top Box (digital signals) and my HDTV Toshiba 29PB200ZE. Is performance can be improved by installing other higher density cable like Coaxial?

user2569: The cabling is likely your problem.  The composite cables you're using (red, yellow, white) will only move analog signal from the set top box to the TV.  Likewise with RG59 or RG6 (coaxial).  
While both varieties of cables there are technically capable of passing digital signals (they don't care... they're just dumb cables), set top boxes typically only output 480i signals on those particular outputs.
They only way you're going to get 720p signal to your TV is by using one of the set top box's outputs capable of transmitting 720p: HDMI, DVI, VGA, or the component RCA outputs (red, green, blue).  Not all set top boxes have all of these.
Incidentally, if you don't have any HD content, the improvement will be marginal.  Standard 480i signals often just don't look that good when displayed on a large flat screen.

user2836: What you are talking about is upscaling and any current HDTV will do upscaling automatically.  Upscaling doesn't work miracles though, it will only make it so that the lower quality signal can be watched on a higher quality display.  It just multiplies the pixels so that a 720 by 480 (.9 pixel compressed) signal for example doesn't end up only taking up 1/4 of your screen.  It doesn't make the video any higher quality (it in fact will be slightly lower quality than if you were to watch it at the native resolution).
Your problem however is not lack of upscaling.  Your problem is using the wrong signal.  You are currently connecting your cable box to your TV through what is known as a composite cable.  It's an old type of analog connection that includes all the video information on the single yellow pin and sends left and right audio on the white and red pins respectively.  It is only capable of reproducing a standard definition signal so you are not actually using HD signals.
To benefit from 720 or 1080 signals, you will have to either use analog Component video (the red/green/blue connectors) or use an HDMI cable.  It's worth noting that as long as your TV and cable box both have component inputs/outputs, you can actually re-purpose the existing Composite cable to carry a component signal, but there will be no audio (you need a separate white/red pair for the audio, which is the same format as with the composite signal).
Once you fix the cable and hookup issue, you should see better image quality.  Personally, I'd recommend using HDMI if it is available on both your cable box and TV as that is the easiest to setup and will give a nice digital signal.

3931: <p>I have Toshiba 29PB200ZE (just purchased). Now the problem is it displays pixels with very blur effect. Reason is that the Cable operators in India (using Standard Channel Broadcasting) broadcasting 720p resolution output. As I have 1080p HDTV it does not displays output properly. Means that tiering the pixels.</p>

<p>Is there any converter available that converts 720p output from Channel (set top box) to 1080p so that I can view output properly.</p>

<p>If I go for HD Channels then issue will not be arised. But as HD channels have very high price range so could not afford them.</p>

<p>Edit: I am using 3 pin (red, yellow and white) cable which connects Set Top Box (digital signals) and my HDTV Toshiba 29PB200ZE. Is performance can be improved by installing other higher density cable like Coaxial?</p>
 2569: <p>The cabling is likely your problem.  The composite cables you're using (red, yellow, white) will only move analog signal from the set top box to the TV.  Likewise with RG59 or RG6 (coaxial).  </p>

<p>While both varieties of cables there are technically capable of passing digital signals (they don't care... they're just dumb cables), set top boxes typically only output 480i signals on those particular outputs.</p>

<p>They only way you're going to get 720p signal to your TV is by using one of the set top box's outputs capable of transmitting 720p: HDMI, DVI, VGA, or the component RCA outputs (red, green, blue).  Not all set top boxes have all of these.</p>

<p>Incidentally, if you don't have any HD content, the improvement will be marginal.  Standard 480i signals often just don't look that good when displayed on a large flat screen.</p>
 2836: <p>What you are talking about is upscaling and any current HDTV will do upscaling automatically.  Upscaling doesn't work miracles though, it will only make it so that the lower quality signal can be watched on a higher quality display.  It just multiplies the pixels so that a 720 by 480 (.9 pixel compressed) signal for example doesn't end up only taking up 1/4 of your screen.  It doesn't make the video any higher quality (it in fact will be slightly lower quality than if you were to watch it at the native resolution).</p>

<p>Your problem however is not lack of upscaling.  Your problem is using the wrong signal.  You are currently connecting your cable box to your TV through what is known as a composite cable.  It's an old type of analog connection that includes all the video information on the single yellow pin and sends left and right audio on the white and red pins respectively.  It is only capable of reproducing a standard definition signal so you are not actually using HD signals.</p>

<p>To benefit from 720 or 1080 signals, you will have to either use analog Component video (the red/green/blue connectors) or use an HDMI cable.  It's worth noting that as long as your TV and cable box both have component inputs/outputs, you can actually re-purpose the existing Composite cable to carry a component signal, but there will be no audio (you need a separate white/red pair for the audio, which is the same format as with the composite signal).</p>

<p>Once you fix the cable and hookup issue, you should see better image quality.  Personally, I'd recommend using HDMI if it is available on both your cable box and TV as that is the easiest to setup and will give a nice digital signal.</p>
