Help with Technical Jargon

[tr10av]

I know this is probably common information for most of the people on this forum, but could someone post the basics of what you guys are discussing or post a link that defines the terms.

Basically what is:
LPCM
MPEG2
AVC
VC-1
etc.

Any help would make all this make much more sense.
Thanks

[Guinness7]

Originally Posted by tr10av

I know this is probably common information for most of the people on this forum, but could someone post the basics of what you guys are discussing or post a link that defines the terms.

Basically what is:
LPCM
MPEG2
AVC
VC-1
etc.

Any help would make all this make much more sense.
Thanks

The things you are talking about are the way the audio and video are encoded. If you do a search like on http://www.wikipedia.org/ you will get the basic idea of what these things are, but do not take everything on wiki for truth becaue it is not allows the truth . Although it will give you a better idea of what they are.

[tr10av]

Ok thanks, I'll have to go see what I can find.

[Deciazulado]

but just a quick answer

LPCM = Linear Pulse Code Modulation, the way most digital audio is recorded, like your CDs. CDs are recorded with PCM with 16 bits assigned to 44,100 samples per second per channel (2) but higher resolutions with PCM can be achieved with other media like Blu-ray and DVD-Audios, etc. Like 24 bits and/or 192,000 samples per second, 5.1 to 8 channels , etc.

LPCM is not compressed (no data is discarded after the sampling)
DolbyDigital and DTS on DVDs takes that uncompressed PCM data and compress it to make it fit on discs. On Blu-rays and HD DVDs, there are newer/higher bit-rate versions of DolbyDigital and DTS that compress the data less, or even "losslessly" (like uncompressed LPCM, but shrunk using computer redundancy tricks without discarding any data), or you can have the LPCM tracks as is, on the discs.


MPEG-2 is a Motion Pictures Experts Group video compression codec. For example all your DVD's videos are compressed in MPEG-2, and for High Definition Broadcasts and Blu-rays too.

VC-1 and AVC (<-AVC is also known as MPEG-4 Part 10 or H.264) are newer, more advanced versions of video compression codecs that let you make the video files smaller w/o losing quality, now being used in Blu-rays and HD DVDs.