opus - Sep 2010 - Celt 0.7.1 High complexity VS Low complexity

Hi,
I was checking complexity modes of CELT 07.1 encoder. If i got it 
correctly everything is driven by pitch_available variable set in 
celt_encoder_create function. By default it's set to 1 hence high 
complexity mode is used all the time. I tried to disable it and although i 
couldn't hear any particular difference in the decoded audio quality, the 
cycle count of the encoder dropped of average 40%.
Is there a reason why it has been set off by default? Are there any known 
issue involved in changing that parameter?

Best Regards
Riccardo 


Riccardo Micci
Senior DSP Engineer, Wireless Group 
Cambridge Consultants
Science Park, Milton Road 
Cambridge, CB4 0DW, England
Switchboard: +44 (0)1223 420024
Direct dial: +44 (0)1223 392402
Mobile: +44 (0)
Fax: +44 (0)1223 423373
riccardo.micci at cambridgeconsultants.com
www.CambridgeConsultants.com
 





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Hi,

The pitch predictor has been removed from CELT, so version 0.9 will no 
loner have one. The complexity setting now control other aspects of the 
encoder and its default is now 5.

	Jean-Marc

On 10-09-24 10:58 AM, Riccardo Micci wrote:
>
> Hi,
> I was checking complexity modes of CELT 07.1 encoder. If i got it
> correctly everything is driven by pitch_available variable set in
> celt_encoder_create function. By default it's set to 1 hence high
> complexity mode is used all the time. I tried to disable it and although
> i couldn't hear any particular difference in the decoded audio quality,
> the cycle count of the encoder dropped of average 40%.
> Is there a reason why it has been set off by default? Are there any
> known issue involved in changing that parameter?
>
> Best Regards
> Riccardo
> ------------------------------------------------------------------------
>
> Riccardo Micci
> Senior DSP Engineer, Wireless Group
>
> *Cambridge Consultants*
> Science Park, Milton Road
> Cambridge, CB4 0DW, England
> Switchboard: +44 (0)1223 420024
> Direct dial: +44 (0)1223 392402
> Mobile: +44 (0)
> Fax: +44 (0)1223 423373
> riccardo.micci at cambridgeconsultants.com
> <mailto:riccardo.micci at cambridgeconsultants.com>
> www.CambridgeConsultants.com <http://www.cambridgeconsultants.com/>
>
>
>
>
>
> ------------------------------------------------------------------------
>
>
> This email is from Cambridge Consultants Limited, Science Park, Milton
> Road, Cambridge CB4 0DW with registered number 1036298 England. It may
> contain confidential information. It is intended for the addressee only
> and may not be copied or disclosed to any third party without our
> permission. If you are not the intended recipient please contact the
> sender as soon as possible and delete the material from any computer. If
> this email has been sent as a personal message to the addressee, the
> sender is not acting in his/her capacity as an employee or officer of
> Cambridge Consultants Limited and no liability is accepted for the
> content of any such email. Outgoing email may be monitored for the
> purpose of ensuring compliance with our email policy and relevant laws.
>
>
>
>
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