IPB

Welcome Guest ( Log In | Register )

Can HE-AAC be losslessly transcoded to LC-AAC?, [TOS #6: moved from General Audio, was “HE-AAC to AAC transcode”]
komuta
post Jan 7 2013, 08:57
Post #1





Group: Members
Posts: 2
Joined: 7-January 13
Member No.: 105660



Hi,

I was wondering if it was possible to transcode losslessly from HE-AAC to AAC. I have a peace of HE-AAC audio which I would like to listen to on a HE-AAC incompatible hardware. My understanding of HE-AAC being it's roughly AAC LC with SBR to gain over bitrate, I thought it might be possible to reconstruct the 48KHz symmetric AAC frame without loss. Would anyone here know if it is possible ?
Go to the top of the page
+Quote Post
 
Start new topic
Replies
nu774
post Jan 7 2013, 10:16
Post #2





Group: Developer
Posts: 562
Joined: 22-November 10
From: Japan
Member No.: 85902



I think it's likely that your hardware can play HE-AAC file as LC-AAC if it is implicitly signaled.
If your hardware supports ADTS playback, try it first.
If not, try remuxing like the following:
CODE
mp4box -raw input.m4a && mp4box -add input_track1.aac -new output.m4a
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 19th December 2014 - 16:32