Audiofyle said:
Found out my TV is 1080i.
You're getting confusing information on TV resolutions. ALL HDTVs are progressive scan, therefore it cannot be a '1080i TV'.
People confuse the resolution of the TV with the resolution of various HD formats:
720p - 1280 x 720 progressive scan, meaning the signal from the source is already progressive scan. The TV will scale that to its native resolution but will not have to 'deinterlace' to turn it into progressive scan because it arrived in progressive scan.
1080i - 1920 x 1080 interlaced. The TV WILL have to deinterlace it and will still scale it to match its native resolution.
1080p - 1920 x 1080 progressive scan. Same as 1080i in terms of resolution but already progressive scan. The TV will not have to deinterlace but will of course still scale it to the TV's native resolution.
Now if the native resolution of your TV just happens to match a HD resolution like 720p then it make sense to say it is a '720p TV'. The resolution of 720p is 1280 x 720 and the resolution of the TV is 1280 x 720. But note that the TV may still accept other resolutions like 480i, 480p, and 1080i. The interlaced versions will be deinterlaced and all of them will be scaled to match the TV resolution.
The highest resolution your TV can accept as an input is 1080i, but what is the TV's resolution? If it is not 1920 x 1080 the image will be scaled to whatever resolution the TV supports.
A TV advertised as '1080p' means one of two things:
1. Its native resolution is 1920 x 1080. It may not accept 1080p inputs but will scale anything it gets to 1080p (that is its native resolution).
2. It can accept 1080p signals AND its native resolution is 1920 x 1080.
You have to read the manual to verify which it is - marketing blurbs are meant to trip up the uninitiated.
The Onkyo 674 has one advantage over the 604 - it can upconvert component video to HDMI which would be necessary if you have any other devices that are not HDMI enabled to connect to the receiver but still want to use HDMI fromt the receiver to the TV.