[M4IF Technotes] Reg: CELP Encoder /LPC Analysis / ACF calulation

[ralf.funken philips.com]

On 2023-09-25 11:34:45 Ananda.Sarangaram wrote:
> hi,
>      In the MPEG-4 CELP Standard, ISO/IEC 14496-3:2001(E)  acf[k]
> calculation uses the upper limit, "frame_size-k-1". But the refence
> software (v1refsoft990809) uses window_size instead of frame size. Which
> one is correct ?
> 

Dear Anand,
Good to hear from you again. Hope you're doing fine.
Regarding CELP: I believe the reference software is correct. The LPC 
analysis should be performed on 'window_size' samples.
Regards,
Ralf Funken
______________________________________________________________________
R.F.M. Funken
Philips Digital Systems Laboratory
Building SFJ-7.22, P.O.Box 80002, 5600 JB  Eindhoven, The Netherlands  
Tel. +31 40 27 36246
Fax. +31 40 27 37353          E-mail address: Ralf.Funken   philips.com
______________________________________________________________________
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