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LTP in AAC LD

Hi,
      I have a doubt regarding the inclusion of LTP module in AAC LD. LD is designed for low delay for effective two way communication. But LTP involves many computations. It involves both encoding and decoding. So doesn't this computation introduce certain delay and make LD inefficient?
Pls reply

Regards
Pratheek

LTP in AAC LD

Reply #1
http://www.hydrogenaudio.org/forums/index....st&p=743933
http://www.hydrogenaudio.org/forums/index....st&p=740184

Quote
• Levels for the Low Delay AAC Profile
Table 1.13 – Level for the Low Delay AAC Profile
Level : 1
Max. channels/object : 2
Max. sampling rate [kHz] : 48
epConfig : 0

LTP is not permitted. Pulse data is not permitted.

Could you pleeeease read your own threads?

Chris
If I don't reply to your reply, it means I agree with you.

 

LTP in AAC LD

Reply #2
Hai Chris
              I had posted those threads at a time when i didn't look LTP..but now that I have looked LTP I had seen many codes that included LTP in LD which includes ISO reference code. The latest MPEG4 spec also tells about LTP in AAC-LD. So LTP is permitted in AAC-LD...actually LD is a modified object of LTP object type. If you have any confusion you can refer ISO MPEG4 spec

 
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