Don't worrya bout dropping lots of Rs. for an AVR to upscale. In fact it is easier for DVDs to do this job since their firmware can be upgraded easily and more often than AVRs.
True, Marsilians. But, babu is looking at scaling BigTV signals. A DVD Player can inly scale inputs from the DVD that is played on it. It cannot accept any external signal and scale it. If you want to do that, you have three options:
1. Allow the TV to scale the signal.
2. USe an AVR that can accept signals from more than one source and scale it.
3. Use an external scaler such as the DVDO that can scale literally anything.
Babu, I was not able to get the specs for your Sharp 42A83. The Sharp website is very very slow and has Flash graphics all over. If your TV can scale that may be the best option. We have discussed this elsewhere, but Indian TV signals are not yet of the quality where they can be scaled to 1080P. If your TV scales to 720P or 1080i, it may be best to leave it at that.
There are a number of scalers available in the world at various price points. But if you are looking at something like the VRS Technology or the Reon processing, I am afraid they will be expensive. Scalers or de-interlacers using Fardoudja Technologies may be cheaper. Whether available in India? That can only be found after some hard work of checking with various dealers.
Babu what AVR do you have? Can you not scale the TV signals through that?
Cheers