| 摘要 |
PURPOSE:To compare a sound packet omission compensation system between systems without depending on a subjective evaluation test by calculating the distortion quantity of an omission compensation sound signal as an objective evaluation scale through the use of a cepstrum coefficient. CONSTITUTION:An analysis segment division means 12 divides an original sound signal and the omission compensation sound signal at every analysis segment and a cepstrum distance calculation means 13 obtains a capstrum distance between the divided signals. A distance accumulation means 14 accumulates the capstrum distance of the analysis segment having sound decision, and a division start point control means 15 moves the division start point of the analysis segment division means 12 by a prescribed quantity so as to execute a processing again. An averaging processing means 16 extracts the prescribed number of the capstrum distances accumulated in the distance accumulation means 14 so as to obtain a mean value, and outputs it as the distortion quantity. Thus, the comparison between the sound packet lack compensation systems can be executed without depending on the subjective evaluation test.
|
