Re: Capture quality modes

"Agamemnon" <agamemnon@xxxxxxxxxxxxxxxx> wrote...
"Matti Lamprhey" <matti@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote...
"JohnT" <johnhillriseDONOTSPAM@xxxxxxxxx> wrote...
"Matti Lamprhey" <matti@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote...
I have a DVD recorder which captures stuff fed from my digibox via
scart, and it offers various quality modes which allow me to cram up
to 6 hours per standard DVD. I've been trying in vain to discover
the different compression methods used for these modes; I assume
they're just quick-and-dirty things like reducing the pixel and
colour resolution?

The Bit Rate.

Er.. yes, it can quickly calculate the bit-rate limit based on 4.77GB
and the number of hours required, but my question is, how does it
achieve that bit rate? I'm assuming there's some standard algorithm
which all such devices adopt...

Yes. Its called MPEG-2.

Is that a compression algorithm, or just a container format? I would
have thought that the methods used by these DVD recorders are really
quite simplistic and primitive. For example, my Humax 9200T stores a
1-hour programme from ITV3 in a 1GB (approx) MPEG-2 file at a quality
which matches my DVD recorder's HQ mode. The HQ mode takes about 4.77GB
to store that file, so the algorithms must be very different.

Matti


.

Relevant Pages

  • Re: Capture quality modes
    ... to 6 hours per standard DVD. ... Is that a compression algorithm, ... The bitrates the DVD recorder uses seem to be typical for that kind of equipment & are designed to cope with typical but otherwise arbitrary video data from a range of typical sources. ...
    (uk.tech.digital-tv)
  • Re: An Open Letter to Kun Gao: Re: Your Ransom Note to the Remaining Anime Industry
    ... prices (and the fact that DVD singles were still alive back then), ... those expenses are included them as part of the costs of dubbing the ... stores that I do not know and online sales. ... their anime because it is clearly unprofitable for the stores to have ...
    (rec.arts.anime.misc)
  • Re: Windows Media Center / PVR Experience
    ... I would reccomend going to different stores ... I watch a lot of TV shows on DVD. ... to rip and re-encode the DVD than it would have taken you to watch it! ...
    (alt.sys.pc-clone.dell)
  • Re: Blu-ray bargain(s)
    ... associated with an external audio system except, perhaps, ... Some specialty stores can provide a convincing demo and so ... years old, the difference between BluRay and DVD, visually ...
    (rec.music.classical.recordings)
  • Re: Why do the HDTVs at circuit city look so awful?
    ... | at stores like Circuit City are for the most part completely ... | I saw a "high def" plasma being demonstrated with a DVD input - ... | widescreen mode, ... getting high def content ever minute the store is open is something ...
    (alt.tv.tech.hdtv)