I have recently bought an HD set and will be having a new HD dish installed next week.  I have read that the HD DVR that I will be using is capable of MPEG-2 and MPEG-4 broadcasts.  I am totally new to HD and have little idea as to what these are.  I am assuming they have to do with the compression of the signal, but maybe someone could give me a detailed explanation as to exactly what they are and how they might effect the broadcasts.  Thanks.
				
			 
	 
	 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		