Patent ID: 8897454
Filing Date: 2014-11-25
Classification: H04N

Abstract:
1. A sound zooming apparatus that is synchronized with a moving picture zooming function, the sound zooming apparatus comprising: a first signal generator that generates a first signal for controlling ambient noise from audio signals input from a plurality of microphones, the first signal is generated by transforming a front-directivity emphasized signal, which is obtained by addition of the audio signals input from the plurality of microphones, and a front-directivity suppressed signal, which is obtained by subtraction of the audio signals input from the plurality of microphones, into time-frequency domain signals, and performing magnitude ratio transformation on each of the time-frequency domain signals according to moving picture zooming control; a second signal generator that generates a second signal for controlling a long distance sound from the audio signals input from the plurality of microphones, the second signal is generated by transforming the audio signals into time-frequency domain signals, and performing phase difference transformation on each of the time-frequency domain signals according to the moving picture zooming control; and a sound zooming processor that generates a sound zooming signal based upon the moving picture zooming control, the first signal, the second signal, and a third signal, which is a weighted value, wherein the sound zooming signal controls the volume of the first and second signal components.