LTP in AAC LD |
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LTP in AAC LD |
 Mar 30 2011, 07:07
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#1
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Group: Members Posts: 56 Joined: 19-January 11 Member No.: 87451  |
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 |
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Mar 30 2011, 12:41
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#2
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 Group: Developer Posts: 618 Joined: 6-December 08 From: Erlangen Germany Member No.: 64012 |
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.
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Mar 30 2011, 16:58
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#3
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Group: Members Posts: 56 Joined: 19-January 11 Member No.: 87451 |
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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Lo-Fi Version | Time is now: 18th May 2013 - 11:41 |
