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What are the resolutions for the different ReplayTV Recording qualities?

359 Views 6 Replies 4 Participants Last post by  bitbyte
I've done a search for this, but got nothing. Perhaps I wasn't using the correct terms in the search.

Regardless, could someone tell me what the diff resolutions are for the 3 different recording qualities on the 50xx series please? Or point me in the right direction.... PLEEEEEEASE!!!

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The ReplayTV takes analog data, digitizes it and then compresses it before it is stored on disk. The input signal to the ReplayTV is 240 scan lines 60 times per second. The 5000 series ReplayTV will store about 1 Gig per hour at the lowest quality, 1.6 Gig per hour at medium quality and 2.5 Gig per hour at highest quality.

That means the digitized / compressed data stored on disk is about 21 bytes per scan line at lowest quality, 34 bytes per scan line at medium quality and 53 bytes per scan line at highest quality.

Because of compression, there is no way to determine what the sampling rate is for each of the different resolutions. Maybe someone that works for ReplayTV could post the info if it is not considered confidential.
Sorry, but I didn't ask for sampling rates. I want to know the x:y dimensions of the mpg.

If what you are saying is that the resolution is the same for each with different sampling rates. Great to know, but what's the resolution/dimension of the mpg?

Example: SVCD uses 480x480 for the image. DVD uses (I think) 740x480.
Since the input to ReplayTV is analog, the only way you can get the x:y dimensions is to know the sampling rate ReplayTV uses when the data gets converted to digital.

DVD data is 480 lines of 704 pixles.
Check the following link to get detailed information:


Quality = Resolution

High = 720x480 (D1)

Medium = 720x480 (D1)

Standard/Extended = 352x480 (HHR)

The difference in Medium to High seems to be in the Bit Rate allowed rather than the resolution (allows for more data per second so less compression and more information makes for better representation).

Hope this helps. I don't know if it is accurate, but here it is. :)

David Stidolph

Austin, TX
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jptsetme and dstidolph,

Thanks, that's exactly what I wanted. :)
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