What does HE VBR and LC VBR stand for?

[FAII]

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I have no idea what the two stand for. For now, I'm encoding everything in HE VBR in StaxRip.

What's the difference? Which one is better when?

[Hyper_Thread]

HE (High Efficiency) AAC is recommended to encode at low bitrates < 80 Kb/s.
LC (Low Complexity) AAC will be more appropriate to encode at bitrates higher than 80 Kb/s.
Personally, i'm using LC-AAC@96Kb/s to encode my movies.

[FAII]

Thank you very much! I'm using HE 64 to encode my movies right now. I plan to use LC 96 for my music videos. What's the maximum bitrate for iPod compatibility?

[check]

Note that ipods don't support HE properly. That is, they will play only the lower half of the frequency spectrum. The maximum bitrate on ipods for music videos seems to be 160kbits.

[FAII]

Note that ipods don't support HE properly. That is, they will play only the lower half of the frequency spectrum. The maximum bitrate on ipods for music videos seems to be 160kbits.
What does that mean? Does that mean that I'll lose some of the sound? Should I encode everything in LC instead?

[check]

if you want it to play in anything apple, use LC profiles only.
You can sort of think of AAC LC as the baseline. All AAC files are encoded using this method. So you can think of this compression and zipping a wave file.
The AAC HE compression will recompress the top 50% of frequencies again, but will leave the lower half untouched. If you keep on with the zipping analogy, you will end up with half the stream in one zip, the other half in a zip inside that original zip.
So apple will decode the LC parts fine, but if you try and play HE stuff, you'll notice all the high frequency sounds are missing.