ACELP | ADPCM | AMBE | AMR | AMR-NB | CELP | Codebook | DTMF | G.723 | G.726 | G.729 | GSM | Interpolation | LPC | LSF | LSP | MELP | PCM | Perceptual | Pitch | PSOL | QCELP | Quantization | SMV | VAD | Vocoder

hi all,
        G.729 recommendation states:-to predict the values of LSF a 4th oreder
MA is used.Two predictions are possible .the encoder chooses which one to use
and indices it with a bit in the bit stream.
after prediction ,prediction error is computed .this error is sent to decoder by
vector quantizing it.
my que is what are these two possible predictions ?
what is MA prediction?
can any body please explain VQ in simple terms.how G.729 does this..
any online reference wud be great help

thanx and regards.
Raj

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(You need to be a member of speechcoding -- send a blank email to speechcoding-subscribe@yahoogroups.com )

Dear Raj,
I recommend two IEEE papers:
(1)Design and description of CS-ACELP: a toll quality 8 kb_s speech coder
(2)Implementation and performance of an 8-kbit/s conjugate structure CELP speech
coder

Best regards
Jianfeng XU

hi all,
>        G.729 recommendation states:-to predict the values of LSF a 4th
oreder MA is used.Two predictions are possible .the encoder chooses which one to
use and indices it with a bit in the bit stream.
>after prediction ,prediction error is computed .this error is sent to
decoder by vector quantizing it.
>my que is what are these two possible predictions ?
>what is MA prediction?
>can any body please explain VQ in simple terms.how G.729 does this..
>any online reference wud be great help
>
>thanx and regards.
>Raj

(You need to be a member of speechcoding -- send a blank email to speechcoding-subscribe@yahoogroups.com )

Hi,
  Refer "Digital speech" by Kondoz
   
  BVL

w...@yahoo.com wrote:
          hi all,
G.729 recommendation states:-to predict the values of LSF a 4th oreder MA is
used.Two predictions are possible .the encoder chooses which one to use and
indices it with a bit in the bit stream.
after prediction ,prediction error is computed .this error is sent to decoder by
vector quantizing it.
my que is what are these two possible predictions ?
what is MA prediction?
can any body please explain VQ in simple terms.how G.729 does this..
any online reference wud be great help

thanx and regards.
Raj

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of speechcoding -- send a blank email to speechcoding-subscribe@yahoogroups.com )