Method for controlling sound inside vehicle and vehicle AVN system
A vehicle audio video navigation (AVN) system may be provided that includes: a plurality of source providers which receives a sound source; a user operation unit which selects at least one of a plurality of the sound sources input from the plurality of the source providers and selects a focusing zone of the sound source; a processor which generates a sound source signal for focusing an output of the selected sound source on the focusing zone; and a multi-channel amplifier which outputs the sound source signal. As a result, the focusing zone of each sound output within a vehicle can be individually controlled. Particularly, the focusing zone of each sound can be easily selected and controlled without changing the location of the speaker within the vehicle. Also, the sound source and the focusing zone within the vehicle can be selected and controlled only by adding an external processor without replacing the AVN device provided in the vehicle.
1. An in-vehicle sound control method comprising:
receiving various sound sources through a plurality of source providers;
detecting a user's selection of at least one of the plurality of the sound sources input through the plurality of the source providers and user's selection of a focusing zone of the sound source;
generating a sound source signal for focusing an output of a user's selected sound source on the focusing zone; and
outputting the generated sound source signal,
wherein an interior space of the vehicle is divided into a plurality of focusing zones, and wherein the in-vehicle sound control method further comprises storing a filter coefficient corresponding to each of the plurality of the focusing zones.
2. The in-vehicle sound control method of claim 1 , further comprising displaying the plurality of the sound sources and a plurality of the focusing zones where the output of the sound source is focused.
3. The in-vehicle sound control method of claim 1 , wherein the outputting the generated sound source signal outputs simultaneously or selectively the respective sound source signals corresponding to the plurality of the sound sources.
4. The in-vehicle sound control method of claim 1 , wherein the generating a sound source signal filters the sound source on the basis of the filter coefficient corresponding to the focusing zone, and generates the sound source signal.
5. The in-vehicle sound control method of claim 1 , wherein the filter coefficient maximizes a ratio between a spatially averaged acoustic energy of the focusing zone selected by the user operation unit and a spatially averaged acoustic energy of a zone other than the focusing zone.