Log in

View Full Version : Plus & Minus for AC3/DTS to AAC (LC or HE)


Mr. Monte
11th September 2010, 20:57
I've spent the last few hours trying to change my search criteria and read any info on plus & minus of converting DTS/DD (AC3) into AAC. The FAQ is a little out of date, the WD HD Live and some other hardware boxes do decode AAC fine. Some have said movies will not come with AAC audio due to royalties. However, the FAQ states Dolby assisted in the development of AAC I believe.

Anyway, I am overseas and not in my livingroom with my Denon AVR.

If I encode my Bluray's/DVD's inot H264 MKV's with AAC 5.1 audio channels. Would HE or LC be best (at their highest bitrate's). Would this effect any of the benefits of the DTS/DD channel info (dynamic range, metadata, audio quality (other than the fact your are transcoding a lossy format and will ultimately "lose" some data).

Will me Denon or any AV reciever still decode the format to the appropriate channels? or is that done with the WD HD Live box through the HDMI cable?

Forgive my ignorance, just a little behind on the formalities.

:thanks:

tebasuna51
12th September 2010, 09:21
- About AAC LC <-> HE read http://forum.doom9.org/showthread.php?p=1432869#post1432869
- AAC LC, with appropriate bitrate, can have the same dynamic range and quality than AC3/DTS
- Standard receivers don't decode AAC
- WD TV Live can't send multichannel PCM (AAC decoded) through HDMI. Try Xtreamer Pro/Sidewinder or maybe others.

Mr. Monte
12th September 2010, 10:27
tebasuna51,

So in general, since HD space is cheap now, it would be best (I use this phrase lightly and hope no "best is your decision" statements are spewed)...best at least for compatibility with more hardware to just copy the audio from the source (DD or DTS). Just makes it hard, cause I cannot use RipBot for that.

Thanks

Ghitulescu
12th September 2010, 10:48
Converting a lossy format into another lossy format would inherently cause additional quality losses, whether one can senses or not is besides the question. But that's only you the one who can decide on this matter.

tebasuna51
12th September 2010, 12:52
Always is better preserve the original AC3/DTS tracks.

Mr. Monte
12th September 2010, 13:09
Thanks to all for your input