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Starred by 3 users
Status: Archived
Owner:
Last visit 19 days ago
Closed: Nov 7
Cc:
Components:
NextAction: ----
OS: ----
Pri: 3
Type: Enhancement



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Memory changes in AEC
Project Member Reported by bjornv@webrtc.org, Jul 3 2014 Back to list
Feature description (please include a link to the functional spec):
For SSE2 and NEON optimizations in AEC the number of frequency elements is 65, hence one extra due to the nature of DFT. This requires optimizations to add and run "left over" C-code by the end of each for-loop. Simply extending the memory to an even power of 4 padded with dummy zeros will make the optimization code simpler without losing in speed.

Eng owner: bjornv@webrtc.org




 
Project Member Comment 1 by andrew@webrtc.org, Jul 3 2014
Cc: andrew@webrtc.org
Nice idea. So we'd do all frequency domain operations in this dummy space, but still only use the first 65 in the inverse-FFT?
Project Member Comment 2 by bjornv@webrtc.org, Jul 4 2014
Partly yes. Only the optimization code will use the dummy space for more efficient vector operations. The C for loops will still loop up to PART_LEN1.
It will make the code so much more cleaner and just a tiny bit more efficient actually.
Project Member Comment 3 by andrew@webrtc.org, Jul 6 2014
Makes sense.
Project Member Comment 4 by tina.legrand@webrtc.org, Oct 30 2014
Labels: EngTriaged IceBox
Project Member Comment 5 by bjornv@webrtc.org, Apr 2 2015
Labels: Pri-3
Project Member Comment 6 by bjornv@webrtc.org, May 26 2015
Cc: bjornv@webrtc.org
Project Member Comment 7 by bjornv@webrtc.org, Jun 9 2015
Cc: -bjornv@webrtc.org henrik.lundin@webrtc.org tina.legrand@webrtc.org
Owner: ----
Status: Available
Project Member Comment 8 by tina.legrand@webrtc.org, Nov 24 2015
Owner: tina.legrand@webrtc.org
Project Member Comment 9 by henrik.lundin@webrtc.org, Oct 5 2016
Components: Audio
Project Member Comment 10 by henrik.lundin@webrtc.org, Oct 5 2016
Components: -SignalProcessing
Project Member Comment 11 by tina.legrand@webrtc.org, Nov 7
Status: Archived
[Bulk edit] This issue hasn't been modified the last twelve months -> archiving.

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