JPH0472800U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of a vehicle-mounted sound reproducing device 1 according to an embodiment of the present invention, FIG. 2 is a block diagram showing a specific configuration of the crosstalk generation circuit C1, and FIG. 3 is a sound image control system. A plan view for explaining the functions of the circuits U1 to U3 and buffers BL and BR, FIG. 4 is a plan view showing the expansion of the sound field according to the present invention, and FIG. 5 is an in-vehicle acoustic system according to another embodiment of the present invention. 2 is a block diagram showing the electrical configuration of a playback device 21. FIG. 1, 21... Vehicle-mounted sound reproduction device, 2... Vehicle interior, 3... Driver's seat, 4... Passenger seat, 3a, 4a...
Listener, 11...Acoustic signal source, AL, AR, AC
...attenuator, BL, BR...buffer, C1-C
3...Crosstalk generation circuit, F1L, F1R,
F2L, F2R, F3L, F3R...BPF, F4
L, F4R...HPF, F5L, F5R, F6L,
F6R...LPF, PL, PR, PC...phase shifter,
SL, SR, SC...Speaker, U1~U3...
Sound image control circuit.

Amendment 3/10/29 The title of the invention is amended as follows. Title of the invention: Sound field expansion control device The scope of the claim for utility model registration is amended as follows.

[Claims for Utility Model Registration] (1) An acoustic signal source that outputs acoustic signals of both left and right channels, and correcting at least one of the phase and level of the acoustic signals of the left and right channels from the acoustic signal source. crosstalk signal creation means for creating a crosstalk signal; crosstalk adjustment means for creating a crosstalk adjustment signal by correcting the level of the audio signal of each left and right channel from the audio signal source; A sound field expansion control device comprising: an adding means for adding a talk adjustment signal. (2) an acoustic signal source that outputs the acoustic signals of the left and right channels to the corresponding speakers of the left and right channels; the acoustic signals of the left and right channels are input, and at least one of the phase and level of the acoustic signals is corrected; crosstalk signal generating means for generating a crosstalk signal by correcting the levels of the acoustic signals of both left and right channels from the acoustic signal source; and a crosstalk adjustment signal, and an addition means for adding the signal and the crosstalk adjustment signal and outputting the result to a speaker of a center channel provided between the speakers of the left and right channels. (3) The crosstalk signal generating means is interposed between the acoustic signal source and the speakers of the left and right channels, and delays the input acoustic signals of the left and right channels, respectively, and outputs the delayed input acoustic signals to the corresponding speakers of the left and right channels. a phase level correction means for performing phase correction and level correction on the sound signals of the left and right channels, respectively; an addition level correction means for adding the sound signals of the left and right channels and correcting the levels; and an addition phase correction means for adding the acoustic signal from the phase level correction means of the right channel and the acoustic signal from the addition level correction means, correcting the phase, and applying it to the addition means. 2. The sound field expansion control device according to 2. (4) Upstream of the crosstalk signal generating means,
4. The sound field expansion control device according to claim 1, further comprising a filter that generates waves in a predetermined frequency band. (5) The sound field expansion control device according to any one of claims 1 to 4, characterized in that a filter that generates waves in a predetermined frequency band is interposed before the crosstalk adjustment means.

Claims (1)

[Claims for Utility Model Registration] (1) Left and right speakers arranged at different directional angles in front left and right of left and right listening positions, and near the center of said left and right speakers; can be,
and a center speaker disposed at a position with a directional angle larger than one of the left and right speakers and smaller than the other; and an acoustic speaker that outputs a left channel acoustic signal to the left speaker and a right channel acoustic signal to the right speaker. a signal source, and a crosstalk for correcting at least one of the level and phase of the acoustic signal of both left and right channels from the acoustic signal source to form a symmetrical sound field at the left and right listening positions, respectively. crosstalk signal creation means for creating a signal and outputting it to the center speaker; and crosstalk adjustment means for correcting and adding the levels of the audio signals of both left and right channels and outputting the resultant signal to the center speaker as a crosstalk adjustment signal. An asymmetric sound field correction device comprising: (2) The asymmetric sound field correction device according to claim 1, wherein the acoustic signals of both the left and right channels are applied to the crosstalk adjustment means via a filter that waves only in a predetermined frequency band.