Probably not. All that means is that the I (interlaced) and P (progressive) scans are interpolated by the TV set and then displayed. All of the picture info should still be available for display.
In general terms, all the interlaced or progressive scan means, is how the TV handles the display on the screen where the progressive scans all the lines of video information progressively (one at a time, sort of a stacking one on top of the other like a computer monitor) to build a picture, while the interlaced scans the info by interlacing several between each other as the display builds.
You should be able to find more accurate info on the web since it'd take quite a bit of time to explain it here in easy to understand terms.
TV signal boosters will significantly improve the picture quality of your TV if the poor quality you are currently experiencing is due to signal degradation. If the cable signal is poor from the source, a signal booster will not help.
The bottom line on the quallity of your picture is the quality of your input signal. A clear, noiseless, high quality non HD input to a HD TV will look great. (There have been studies which show that non-expert viewers will not readily be able to distinguish high-quality non-HD signals from HD signals). A pasty, lossy, low-quality signal will look terrible whether it is HD or non HD (it may even look worse in HD). A HD TV will usually give you a better picture - whatever the quality of your input signal. But the better your input signal - the more improvement you will see.
how far is the signal visible in miles
Bluray is a digital storage format and the signal chain from disc to television remains digital. The data follows a signal path that will normally deliver an identical signal to the television regardless of the brand or model of player. Players are different in that they support different features and have different user interfaces. These don't have any affect on the output image quality.
The quality of a signal is a measure of how much the signal has changed during transmission. A high quality signal has changed very little. A low quality signal has other information in it which was not there in the original signal. The additional unwanted information is called noise.
The picture is slightly better in some circumstances because the S-Video separates the brightness and color signal from the source on two conductors in the cable. The resolution is the same, and does not effect the audio quality. If your TV has only S-Video or composite connectors, you may notice no difference in the quality of the picture. The big steps in quality upgrade come when you use a component video or HDMI cable.
In wifi, modulated signal is radio wave where as life modulated signal is light. It is visible electromagnetic spectrum and has higher bandwidth than wifi but has Line of sight limitation.
A 1/8 inch connection is an analog signal and does not have the quality of a digital USB connection for the speakers.
The kind of signal you have would depend on who your service is through and what kind of service it is, and yes Rogers has a 'signal booster'.
An HD LCD television will be able to handle any HD incoming signal inclusing 720p and 1080i. It will also handle any SD signal. The picture will be as good as the source. If the source is HD, you should expect to see HD quality. If it SD, expect SD quality. The HDMI cable merely passes data from the source to the television and does not affect quality of images.
Set top box is basically used to convert the digital signals broadcasted by digital signal broadcasters to analog signals, in case you wish to have your analog tv, but would like to have an access to digital channels. Digital channels definitely have better quality signals than analog and therefore you will have a better picture quality and signal quality even though you have converted the digital signals to analog.
No. It matters only when you are dealing with an analog signal. With digital signals the signal is there or its not. There is no improvement by choosing the really expensive monster cables.