Method and apparatus for selecting an encoding rate in a...

G - Physics – 10 – L

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G10L 19/14 (2006.01) G10L 19/04 (2006.01)

Patent

CA 2488921

The present invention provides a method by which to reduce the probability of coding low energy unvoiced speech as background noise. An encoding rate is determined by dividing the input signal into subbands using digital subband filters (4) and (6) and comparing the energy in those bands to a set of thresholds in subband rate decision elements (12) and (14) and then examining those comparisons in an encoding rate selector (15). By this method, unvoiced speech can be distinguished from background noise. The present invention, also, provides a means for setting the threshold levels using the signal to noise ratio of the input signal, and the present invention provides a method for coding music through a variable rate vocoder by examining the periodicity of the input signal to distinguish the music from background noise.

La présente invention concerne une méthode de réduction de la probabilité de coder des signaux de parole non significatifs comme bruit de fond. Le taux de codage est déterminé en divisant le signal vocal d'entrée en plusieurs sous-bandes au moyen de filtres numériques (4) et (6) et en comparant l'énergie dans ces sous-bandes à un ensemble de seuils dans des éléments de décision de taux de sous-bande (12) et (14) et en examinant les résultats de ces comparaisons dans un sélecteur de taux de codage (15). Par cette méthode, les signaux de parole non significatifs peuvent être distingués du bruit de fond. La présente invention porte également sur un moyen de fixer des niveaux de seuil en utilisant le rapport signal/bruit du signal vocal d'entrée et concerne aussi une méthode de codage de la musique au moyen d'un vocodeur à taux variable en examinant la périodicité du signal d'entrée pour distinguer la musique du bruit de fond.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for selecting an encoding rate in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for selecting an encoding rate in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for selecting an encoding rate in a... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1721396

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.