INFORMATION TERMINAL DEVICE, SOUND CONTROL METHOD AND PROGRAM

摘要

An information terminal device, a sound control method and a program, which enable a good stereo surround effect suitable for a screen display to be obtained even with a miniature speaker. A controller (8) controls a selector (16) so as to switch the orientation of an image in a display unit (2) in accordance with the orientation of the information terminal device sensed by an orientation sensor (7), and, among at least 3 speakers (4, 5 and 6), a mid/high range stereo signal of a right channel is inputted to at least one speaker on the right side with respect to a user, a mid/high range stereo signal of a left channel is inputted to at least one speaker on the left side with respect to the user, and a low range monaural signal is inputted to another speaker.

主权项

1. An information terminal device, comprising:
a display unit displaying an image; at least 3 speakers disposed at prescribed positions on a periphery of said display unit and outputting sound information; a first filter dividing a stereo signal of a left channel, among said sound information, into two signals: a low range stereo signal having a frequency less than a prescribed frequency and a mid/high range stereo signal having said prescribed frequency or more; a second filter dividing a stereo signal of a right channel, among said sound information, into two signals: a low range stereo signal having a frequency less than said prescribed frequency and a mid/high range stereo signal having said prescribed frequency or more; al signal synthe a mixer generating a low range monaursizing said low range stereo signal of said left channel from said first filter and said low range stereo signal of said right channel from said second filter; a selector assigning said mid/high range stereo signal of said left channel from said first filter, said mid/high range stereo signal of said right channel from said second filter, and said low range monaural signal from said mixer, to said at least three speakers; an orientation sensor sensing orientation of said information terminal device held by a user; and a controller controlling said selector so as to switch orientation of said image in said display unit is switched and switch a signal inputted to said speakers, in accordance with the orientation of said information terminal device sensed by said orientation sensor; wherein said controller controls said selector so that, among said at least 3 speakers, said mid/high range stereo signal of said right channel is inputted to at least one speaker on the right side with respect to the user, said mid/high range stereo signal of said left channel is inputted to at least one speaker on the left side with respect to the user, and said low range monaural signal is inputted to another speaker.