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US 8,897,454 B2Granted
Sound zooming apparatus and method synchronized with moving picture zooming function
AssigneeSamsung Electronics Co., Ltd.
InventorsSo-young Jeong, Kwang-cheol Oh
Life of this patent
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Abstract
A sound zooming technique synchronized with a moving picture zooming function is disclosed. A signal to control ambient noise and a signal to control a long distance sound are extracted from an audio signal input through a plurality of microphones. A front directivity-emphasized signal is masked using the two signals and a weighted value to control volume.
Claims20
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.
2 more elements
A sound zooming method synchronized with a moving picture zooming function, the method comprising:
- generating 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;
- generating 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
- generating 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.
2 more elements
Dependencies are inferred from the claim text.