Sound emission and collection apparatus and control method...

H - Electricity – 04 – R

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H04R 3/00 (2006.01) H04M 3/56 (2006.01) H04R 1/40 (2006.01) H04R 3/02 (2006.01)

Patent

CA 2653598

A level ratio calculation circuit calculates average signal decibel data of signal level data corresponding to each collecting voice beam signal, and a level ratio of each of signal level data to the average signal level data. Since a detouring voice is substantially equal to all signal levels, a detouring voice component of the average signal level data are also substantially the same. On one hand, a collecting voice from a narrator is inherent to the signal level data of a corresponding collecting voice beam signal. Thus, portions corresponding to the detouring voice are flat and become locally high in level only at portions corresponding to the collecting voice. By using this, the collecting voice beam signal including the collecting voice is detected.

L'invention concerne un circuit de calcul de rapport de niveau calculant des données moyennes de décibel de signal de données de niveau de signal correspondant à chaque signal de faisceau vocal de collecte, et un rapport de niveau de chacune des données de niveau de signal sur les données moyennes de niveau de signal. Étant donné qu'une voix de détour est sensiblement égale à tous les niveaux de signaux, une composante de voix de détour des données moyennes de niveau de signal est également sensiblement la même. D'une part, une voix de collecte provenant d'un narrateur est inhérente aux données de niveau de signal d'un signal de faisceau vocal de collecte correspondant. Ainsi, des parties correspondant à la voix de détour sont uniformes et deviennent localement élevées au niveau seulement de parties correspondant à la voix de collecte. En utilisant ceci, le signal de faisceau vocal de collecte comprenant la voix de collecte est détecté.

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