JPH0472799U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of a vehicle-mounted sound reproduction 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. DESCRIPTION OF SYMBOLS 1, 21... Vehicle-mounted sound reproduction device, 2... Vehicle interior, 3... Driver's seat, 4... Passenger seat, 3a... Listener, 11... Sound signal source, AL, AR... Attenuator,
BL, BR...Buffer, C1-C3...Crosstalk generation circuit, F1L, F1R, F2L, F2
R, F3L, F3R…BPF, F4L, F4R…
HPF, F5L, F5R, F6L, F6R...LP
F, PL, PR...phase shifter, SL, SR...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 acoustic signals of both left and right channels; and a crosstalk signal that corrects at least one of the phase and level of the acoustic signals of each of the left and right channels to create a crosstalk signal of each of the right and left channels. creating means; crosstalk adjustment means for correcting the levels of the sound signals of the left and right channels from the sound signal source to create crosstalk adjustment signals for the right and left channels; A sound field expansion control device comprising: an addition means for adding a crosstalk signal and a crosstalk adjustment signal of corresponding left and right channels to a signal and outputting the result to a speaker for each left and right channel. (3) The crosstalk signal generating means is interposed between the acoustic signal source and the adding means,
a delay means for respectively delaying the input audio signals of the left and right channels, and outputting the delayed input audio signals to the adding means for the left and right channels; 3. The sound field expansion control device according to claim 2, further comprising phase level correction means for outputting to the channel addition means. (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 of the left and right sides of a listening position, and outputting a left channel acoustic signal to the left speaker. , an acoustic signal source that outputs a right channel acoustic signal to a right speaker; and a sound signal source that corrects at least one of the level and phase of the left and right channel acoustic signals from the acoustic signal source and adjusts the level and phase of the left and right channel acoustic signals to the listening position. Crosstalk signal generation means for creating a crosstalk signal for forming a left-right symmetrical sound field and outputting it to the right and left speakers, respectively; An asymmetric sound field correction device comprising: crosstalk adjustment means that outputs adjustment signals to the right and left speakers, respectively. (2) The asymmetric sound field correcting device according to claim 1, wherein the acoustic signals of the left and right channels are provided to the crosstalk adjusting means via a filter that waves only in a predetermined frequency band.