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Question: about full resoution?

i have HP laptop with HDMI, screen resolution is 1024x768, so when i connected my laptop directly to LCDTV(40") video is coming only small resolution(1024x768). i m thinking to buy Onkyo model, and my plan is to connect Laptop HDMI out to Onkyo and then Onkyo HDMI out to LCD, then i will get full resoution(1920x1080) or what? please tell me..?