Originally posted by bobchew:
well , we are in funny mood arent we..i hadnt bargained for a put down this early in the day....perhaps something had been lost in translation.
therefore of being a chap of goodwill i will make it as clear as i can ok?...(1) i didnt say that WMA has anything to do with DVD Audio..unless as a source file by some DVD Audio author tools.
The point one was making was that since microsoft had hinted that a standalone device utilising SPDIF i believe would be capable of playing from disc -a multi channel wma file in surround, one could place on said disc a wma pro multichannel file and play it in surround 'like' a DVD Audio ie play great big 96/24 6 channel lossless file from a disc in a standalone device which plays wma pro files....ok ya?
wma pro is nothing to with dvd video?..hmm so that app i have doesnt convert wma pro multichannel files in dolby ac3 5.1 files that i have (20 -30 ive created)..doesnt..dvd video use dolby ac3 audio..think so....and i made them myself...my audio that i did myself saved as wma pro mc which got converted to ac3....hmmm...also a standalone deck that decodes and plays wma pro could ..er well play wmv video that had wma pro audio in it could it not?- so wma is a microsoft version of mp3..that would be that 5.1 surround mp3 would it? yep nothing new... i cordially return your parting shot back to you.and hope you get well soon :)
Oh dear me - there is no feeling like knowing full well that whatever you say is not being read properly. But I will try - again - to tell you what the situation is with
DVD-Video.
DVD-Video plays back in the following audio types.
1 -
LPCM (stereo only)
2 -
Dolby Digital (up to 5.1)
3 -
DTS (up to 5.1)
4 -
MPEG (up to 7.1)
Only stream types 1 & 2 are mandatory support i players, meaning that one of these must be present on the disc.
NOWHERE in the DVD-Video spec books does it make ANY mention of WMA, WMA Pro or WMA Pro Lossless (all 3 of which are different codecs, BTW). I do not personally give a short,
sharp one about what applications you may have that will transcode an AC3 stream to a WMA stream. This does not mean it is anything to do with the format known as DVD-Video.
Neither is it mandatory for any DVD players to play any WMA streams - be they WMA, WMA Pro, WMA Lossless or
WMV, WMV-
HD (AKA
VC-1) or whatever. If this functionality is oincluded in any set top DVD player, it is included as a bonus, much like
CD-Audio playback, or VCD/SVCD - none of these are DVD-Video either, yet you can still play them on *some* players. Including them on any DVD disc would make it a
DVD-ROM disc, not a DVD-Video disc, and as such playback is far from a guaranteed deal. So it matters not one iota - WMA/WMV is not now, never has been & never will be anything at all to do with DVD-Video.
When I tell you that WMA is a microsoft version of MP3, I am referring to the means the algo uses to achieve data reduction - perceptual encoding by use of Psychoacoustical principles as well as auditory masking. Exactly as Fraunhofer do with MP3.
