Patent ID: 7968786
Filing Date: 2011-06-28
Classification: H03G,H04R

Abstract:
1. A volume adjusting apparatus comprising: a sound collecting unit configured to collect noise data of a surrounding environment; an analyzing unit configured to extract a feature value indicating a feature of the noise data collected by the sound collecting unit and a feature value indicating a feature of supplied musical tune data; and a control unit configured to generate volume adjustment information for adjusting playback volume of the musical tune data based on the feature value of the noise data and the feature value of the musical tune data and adjust the playback volume of the musical tune data based on the volume adjustment information, wherein the control unit includes a memory configured to store a predetermined number of pieces of the volume adjustment information, and the control unit generates the volume adjustment information based on the feature values of the noise data and the musical tune data every predetermined time and adjusts the playback volume of the musical tune data based on an average of the predetermined number of pieces of volume adjustment information stored in the memory wherein the control unit performs convolution of weighting factors on the predetermined number of pieces of volume adjustment information stored in the memory, respectively, and adjusts the playback volume of the musical tune data based on the average of the predetermined number of pieces of weighting-factor convoluted volume adjustment information, and wherein the weighting factors are set so that a weight of the volume adjustment information reduces as the volume adjustment information gets older.