what is HC-AAC

[raido]

The hydrogen audio wiki here...
http://wiki.hydrogenaudio.org/index.php?title=Nero_AAC#Q0.3_VBR_AAC_.28Forced_HC.29

describes an encoding setting called "forced HC". What is this? I though AAC had only LC and HE.

[sneaker_ger]

Seems to be a typo in the wiki.

[detmek]

Yes, its a typo. It should be "Forced HE" as it describes usage of -he switch (typo in the command line too).

[burfadel]

In any case, you don't want to use HE unless its for voice recordings. For movies, music etc you should only ever use LC. Unfortunately the naming of these is misleading, with HE meaning 'High Efficiency' people thing its better than LC 'Low Complexity', but quality wise its the other way around.

[detmek]

For stereo sources - HE should be used for average bitrates between 48kbs and 80kbs. For average bitrates above 80kbs LC should be used and for average bitrates below 48kbs hev2 is preffered option.
But, CBR/ABR encoding should be avoided anyway. VBR is more efficient and will give you better quality for the same bitrate. By default NeroAAC encoder chooses profile automaticly based on bitrate for CBR/ABR or Q factor for VBR so it is not good idea one to manualy specify it.

[burfadel]

That's a better way of explaining it :) I used movies and music as an example because you wouldn't really want music or movies at 50kbps. Maybe I'm just too fussy :D

[bazz]

For stereo sources - HE should be used for average bitrates between 48kbs and 80kbs. For average bitrates above 80kbs LC should be used and for average bitrates below 48kbs hev2 is preffered option.
But, CBR/ABR encoding should be avoided anyway. VBR is more efficient and will give you better quality for the same bitrate. By default NeroAAC encoder chooses profile automaticly based on bitrate for CBR/ABR or Q factor for VBR so it is not good idea one to manualy specify it.
thank you , i use it just like that
small bitrates under 80Kbps as you said , i change samplerate to 44100Hz with Dolby Pro Logic II and seem to get good results
i stick to HE-AAC, ive read this gives better quality when used like this!
much better than using HE-AAC+PS (which i know little about)
but would you say this is correct , stick with HE-AAC when encoding with low bitates and forget about HE-AAC+PS
thanks