TWI735968B - Sound field type natural environment sound system - Google Patents

Abstract

A sound field type natural environment sound effect system, comprising: a first main channel playback device, which plays a main audio signal, the main audio signal is generated based on a left channel audio signal and/or a right channel audio signal Obtained; a first auxiliary signal circuit, based on the left channel audio signal and the right channel audio signal to generate a first auxiliary audio signal; and a first sound field control playback device, connected to the first auxiliary signal circuit, and Play the first sub audio signal; wherein there is a first play delay time between the play of the first sub audio signal and the play of the main audio signal; wherein the first audio field controls the first sub played by the playback device The audio signal is not mixed with the main audio signal by a first mixing circuit.

Description

Sound field type natural environment sound system

The present invention relates to a sound field type natural environment sound effect system, in particular to a sound field type natural environment sound effect system including a secondary signal circuit and a sound field control playback device.

The traditional sound system uses HRTF (Head Related Transfer Function) calculations to achieve 3D surround sound effects, in which the calculated sub audio signal is mixed to the main audio signal through a mixer, which uses an electronic mixing system to output The audio signal is relatively unnatural, and users will obviously feel that this audio signal is an unnatural audio signal that has been artificially processed. In view of this, in order to reduce the unnaturalness of the output audio signal, a sound field type natural environment sound effect system that does not use an electronic mixer for mixing but is naturally mixed in a natural environment is required.

In order to solve the above-mentioned problems, one of the ideas of the present invention is to provide a sound field type natural environment sound effect system that does not use an electronic mixer for mixing, but is naturally mixed in a natural environment.

Based on the aforementioned concept, the present invention provides a sound field type natural environment sound effect system, including: a first main channel playback device, which plays a main audio signal based on a left channel audio signal and/or a A right channel audio signal is generated; a first sub-signal circuit generates a first sub-audio signal based on the left-channel audio signal and the right-channel audio signal; and a first audio field control playback device, connected The first sub-signal circuit plays the first sub-audio signal; wherein there is a first playback delay time between the playback of the first sub-audio signal and the playback of the main audio signal; wherein the first audio field controls the playback The first sub audio signal played by the device is not mixed with the main audio signal by a first mixing circuit.

In a preferred embodiment of the present invention, the main audio signal is obtained by mixing the left channel audio signal and the right channel audio signal by a main channel mixer.

In a preferred embodiment of the present invention, the main audio signal played by the first main channel playback device and the first sub audio signal played by the first sound field control playback device are naturally played after being played. Mix in the environment.

In a preferred embodiment of the present invention, the first main channel playback device has a first playback direction, the first sound field control playback device has a second playback direction, and the first playback direction is connected to the second playback direction. The angle between the playback directions is greater than 45 degrees.

In a preferred embodiment of the present invention, the first sub-signal circuit includes: a first subtracting operational amplifier; a first attenuator connected after the first subtracting operational amplifier; and a first high-pass filter connected to After the first attenuator; a first digital delay circuit connected after the first high-pass filter; and a first amplifier connected after the first digital delay circuit.

In a preferred embodiment of the present invention, the first sound field control playback device has a low-pass filter function.

In a preferred embodiment of the present invention, the first sound field control playback device has a first wool felt dust-proof portion and a first kraft paper voice coil, and the first sound field control playback device uses the first sheep The felt dustproof part and the first kraft paper voice coil achieve the low-pass filtering function.

In a preferred embodiment of the present invention, the length of the first playback delay time is determined according to a control signal provided by a user.

In a preferred embodiment of the present invention, the sound field-type natural environment sound effect system further includes: a second main channel playback device, which plays the right channel audio signal; a second sub signal circuit, according to the left sound Channel audio signal and the right channel audio signal to generate a second sub audio signal; and a second audio field control playback device, connected to the second sub signal circuit, and playing the second sub audio signal; wherein the main audio signal Is the left channel audio signal; wherein there is a second playback delay time between the playback of the second sub audio signal and the playback of the right channel audio signal; wherein the second sound field controls the first playback device played by the playback device The second audio signal is not mixed with the main audio signal and/or the right channel audio signal by a second mixing circuit.

In a preferred embodiment of the present invention, the right channel audio signal played by the second main channel playback device and the second sub audio signal played by the second sound field control playback device are after playback Mix in a natural environment.

In a preferred embodiment of the present invention, the second main channel playback device has a third playback direction, the second sound field control playback device has a fourth playback direction, and the third playback direction is the same as the fourth playback direction. The angle between the playback directions is greater than 45 degrees.

In a preferred embodiment of the present invention, the second sub-signal circuit includes: a second subtracting operational amplifier; a second attenuator connected after the second subtracting operational amplifier; and a second high-pass filter connected to After the second attenuator; a second digital delay circuit connected after the second high-pass filter; and a second amplifier connected after the second digital delay circuit.

In a preferred embodiment of the present invention, the second sub-signal circuit includes: an addition operational amplifier; a second attenuator connected after the second subtracting operational amplifier; and a second high-pass filter connected to the After the second attenuator; a second digital delay circuit connected after the second high-pass filter; and a second amplifier connected after the second digital delay circuit.

In a preferred embodiment of the present invention, the second sound field control playback device has a low-pass filter function.

In a preferred embodiment of the present invention, the second sound field control playback device has a second wool felt dust-proof portion and a second kraft paper voice coil, and the second sound field control playback device uses the second sheep The felt dustproof part and the second kraft paper voice coil achieve the low-pass filtering function.

In a preferred embodiment of the present invention, the length of the second playback delay time is determined according to a control signal provided by a user.

The foregoing aspects and other aspects of the present invention will be more clarified based on the detailed description of the following non-limiting specific embodiments and with reference to the accompanying drawings.

Please refer to the first figure, which illustrates a system architecture diagram of a specific embodiment of a sound field type natural environment sound effect system according to the present invention. As shown in the embodiment shown in the first figure, the sound field type natural environment sound effect system 100 includes a main channel front-end circuit 110, a first main channel playback device 120, a second main channel playback device 130, a first sub-signal circuit 140, The first sound field controls the playback device 150, the second sub-signal circuit 160, and the second sound field controls the playback device 170. Among them, the main channel front-end circuit 110 is connected to the first main channel playback device 120 and the second main channel playback device 130, the first sub-signal circuit 140 is connected to the first sound field control playback device 150, and the second sub-signal circuit 160 is connected The second sound field controls the playback device 170.

In the embodiment shown in the first figure, the first main channel playback device 120 plays the left channel audio signal provided by the main channel front-end circuit 110, and the second main channel playback device 130 plays the left channel audio signal provided by the main channel front-end circuit. Right channel audio signal provided by 110. In a specific embodiment, the left channel audio signal and the right channel audio signal are received by the main channel front-end circuit 110. The first sub signal circuit 140 generates a first sub audio signal according to the left channel audio signal and the right channel audio signal, and the first audio field controls the playback device 150 to play the first sub audio signal. The second sub-signal circuit 160 generates a second sub-audio signal according to the left-channel audio signal and the right-channel audio signal, and the playback device 170 is controlled by the second sound field to play the second sub-audio signal. Among them, there is a first playback delay time between the playback of the first audio signal and the playback of the left channel audio signal, and there is a second playback between the playback of the second audio signal and the playback of the right channel audio signal. delay. That is, the first audio field control playback device 150 plays the first sub audio signal after the first playback delay time passes after the first main channel playback device 120 plays the left channel audio signal. The second sound field control playback device 170 plays the second sub audio signal after the second main channel playback device 130 plays the right channel audio signal, and then the second playback delay time passes. In a specific embodiment, the length of the first playback delay time and the length of the second playback delay time are determined according to the control signal provided by the user. In a specific embodiment, the length of the first playback delay time and the length of the second playback delay time are determined according to the user's preference or the size of the audition environment or factory preset values. In a specific embodiment, the user can control the length of the first playback delay time and the length of the second playback delay time by the first control signal and the second control signal, respectively. In a specific embodiment, the length of the first playback delay time and the length of the second playback delay time are between 10 ms and 300 ms. In a specific embodiment, the sound field type natural environment sound effect system 100 is a stereo system. It should be understood that the longer the playback delay time, the greater the audition environment and the greater the sound field performance.

In the embodiment shown in the first figure, the first sub audio signal played by the first sound field control playback device 150 is not combined with the left channel audio signal and/or right sound by any mixing circuit or mixer. Channel audio signals are mixed, and the second sub audio signal played by the second sound field control playback device 170 is not combined with the left channel audio signal and/or the right channel audio through any mixing circuit or mixer. The signal is mixed. It should be understood that the left channel audio signal played by the first main channel playback device 120 and the first sub audio signal played by the first sound field control playback device 150 are naturally mixed in the natural environment after being played, and The right channel audio signal played by the second main channel playback device 130 and the second sub audio signal played by the second sound field control playback device 170 are naturally mixed in a natural environment after being played.

Please refer to the second figure, which illustrates a schematic diagram of a specific embodiment of a sound field type natural environment sound effect system according to the present invention. As shown in the embodiment shown in the second figure, the sound field type natural environment sound effect system 200 is a stereo system. Among them, the sound field type natural environment sound effect system 200 includes a main channel front-end circuit 210, a first main channel playback device 220, a second main channel playback device 230, a first sub signal circuit 240, and a first sound field control playback device 250, the second sub-signal circuit 260, and the second sound field controlling the playback device 270. Among them, the main channel front-end circuit 210 is connected to the first main channel playback device 220 and the second main channel playback device 230, the first sub-signal circuit 240 is connected to the first sound field control playback device 250, and the second sub-signal circuit 260 is connected The second sound field controls the playback device 270.

In the embodiment shown in the second figure, the first sub-signal circuit 240 includes a first subtracting operational amplifier 241, a first attenuator 243, a first high-pass filter 245, a first digital delay circuit 247, and a first amplifier 249. Among them, the first attenuator 243 is connected after the first subtraction operational amplifier 241, the first high-pass filter 245 is connected after the first attenuator 243, the first digital delay circuit 247 is connected after the first high-pass filter 245, and the first After the amplifier 249 is connected to the first digital delay circuit 247, the first amplifier 249 is also connected to the first sound field control playback device 250. The second sub-signal circuit 260 includes an addition operational amplifier 261, a second attenuator 263, a second high-pass filter 265, a second digital delay circuit 267, and a second amplifier 269. The second attenuator 263 is connected after the addition operational amplifier 261, the second high-pass filter 265 is connected after the second attenuator 263, the second digital delay circuit 267 is connected after the second high-pass filter 265, and the second amplifier 269 After being connected to the second digital delay circuit 267, the second amplifier 269 is connected to the second sound field control playback device 270. In a specific embodiment, since the first sound field control playback device 250 has a low-pass filter function, there is no need to install a low-pass filter between the first amplifier 249 and the first sound field control playback device 250. In a specific embodiment, since the second sound field control playback device 270 has a low-pass filter function, there is no need to install a low-pass filter between the second amplifier 269 and the second sound field control playback device 270.

而第二副音頻訊號為：

其中，L為左聲道音頻訊號，R為右聲道音頻訊號，n為放大倍數。在不同具體實施例中，n可視需求而預先決定，或可由使用者依需求而自行調整。在不同具體實施例中，n可為固定值，或可遙控設定。In a specific embodiment, the first secondary audio signal is:

And the second audio signal is:

Among them, L is the left channel audio signal, R is the right channel audio signal, and n is the magnification. In different specific embodiments, n can be determined in advance according to needs, or can be adjusted by the user according to needs. In different specific embodiments, n can be a fixed value or can be remotely set.

Please refer to the third figure, which illustrates a schematic diagram of a specific embodiment of a sound field type natural environment sound effect system according to the present invention. As shown in the embodiment shown in the third figure, the sound field type natural environment sound effect system 300 is a stereo system. Among them, the sound field type natural environment sound effect system 300 includes a main channel front-end circuit 310, a first main channel playback device 320, a second main channel playback device 330, a first sub signal circuit 340, and a first sound field control playback device 350. The second sub-signal circuit 360 and the second sound field control playback device 370. Among them, the main channel front-end circuit 310 is connected to the first main channel playback device 320 and the second main channel playback device 330, the first sub-signal circuit 340 is connected to the first sound field control playback device 350, and the second sub-signal circuit 360 is connected The second sound field controls the playback device 370.

In the embodiment shown in FIG. 3, the first sub-signal circuit 340 includes a first subtracting operational amplifier 341, a first attenuator 343, a first high-pass filter 345, a first digital delay circuit 347, and a first amplifier 349. Among them, the first attenuator 343 is connected after the first subtracting operational amplifier 341, the first high-pass filter 345 is connected after the first attenuator 343, the first digital delay circuit 347 is connected after the first high-pass filter 345, and the first After the amplifier 349 is connected to the first digital delay circuit 347, the first amplifier 349 is also connected to the first sound field control playback device 350. The second sub-signal circuit 360 includes a second subtracting operational amplifier 361, a second attenuator 363, a second high-pass filter 365, a second digital delay circuit 367, and a second amplifier 369. Among them, the second attenuator 363 is connected after the second subtracting operational amplifier 361, the second high-pass filter 365 is connected after the second attenuator 363, the second digital delay circuit 367 is connected after the second high-pass filter 365, and the second After the amplifier 369 is connected to the second digital delay circuit 367, the second amplifier 369 is also connected to the second sound field control playback device 370. In a specific embodiment, since the first sound field control playback device 350 has a low-pass filter function, there is no need to install a low-pass filter between the first amplifier 349 and the first sound field control playback device 350. In a specific embodiment, since the second sound field control playback device 370 has a low-pass filter function, there is no need to install a low-pass filter between the second amplifier 369 and the second sound field control playback device 370.

而第二副音頻訊號為：

其中，L為左聲道音頻訊號，R為右聲道音頻訊號，n為放大倍數。在不同具體實施例中，n可視需求而預先決定，或可由使用者依需求而自行調整。在不同具體實施例中，n可為固定值，或可遙控設定。In a specific embodiment, the first secondary audio signal is:

And the second audio signal is:

Among them, L is the left channel audio signal, R is the right channel audio signal, and n is the magnification. In different specific embodiments, n can be determined in advance according to needs, or can be adjusted by the user according to needs. In different specific embodiments, n can be a fixed value or can be remotely set.

Please refer to FIG. 4, which illustrates a schematic diagram of a specific embodiment of a sound field-type natural environment sound effect system according to the present invention. As shown in the embodiment shown in the fourth figure, the sound field type natural environment sound effect system 400 is a stereo system. Among them, the sound field type natural environment sound effect system 400 includes a main channel front-end circuit 410, a first main channel playback device 420, a second main channel playback device 430, a first sub signal circuit 440, and a first sound field control playback device 450, a second sub-signal circuit 460, and a second sound field control playback device 470. Among them, the main channel front-end circuit 410 is connected to the first main channel playback device 420 and the second main channel playback device 430, the first sub-signal circuit 440 is connected to the first sound field control playback device 450, and the second sub-signal circuit 460 is connected The second sound field controls the playback device 470.

In the embodiment shown in FIG. 4, the first sub-signal circuit 440 includes a first subtracting operational amplifier 441, a first attenuator 443, a first high-pass filter 445, a first digital delay circuit 447, and a first amplifier 449. Among them, the first attenuator 443 is connected after the first subtraction operational amplifier 441, the first high-pass filter 445 is connected after the first attenuator 443, the first digital delay circuit 447 is connected after the first high-pass filter 445, and the first After the amplifier 449 is connected to the first digital delay circuit 447, the first amplifier 449 is also connected to the first sound field control playback device 450. The second sub-signal circuit 460 includes a second subtracting operational amplifier 461, a second attenuator 463, a second high-pass filter 465, a second digital delay circuit 467, and a second amplifier 469. Among them, the second attenuator 463 is connected after the second subtracting operational amplifier 461, the second high-pass filter 465 is connected after the second attenuator 463, the second digital delay circuit 467 is connected after the second high-pass filter 465, and the second The amplifier 469 is connected to the second digital delay circuit 467, and the second amplifier 469 is connected to the second sound field control playback device 470. In a specific embodiment, since the first sound field control playback device 450 has a low-pass filter function, there is no need to install a low-pass filter between the first amplifier 449 and the first sound field control playback device 450. In a specific embodiment, since the second sound field control playback device 470 has a low-pass filter function, there is no need to install a low-pass filter between the second amplifier 469 and the second sound field control playback device 470.

而第二副音頻訊號為：

其中，L為左聲道音頻訊號，R為右聲道音頻訊號，n為放大倍數。在不同具體實施例中，n可視需求而預先決定，或可由使用者依需求而自行調整。在不同具體實施例中，n可為固定值，或可遙控設定。In a specific embodiment, the first secondary audio signal is:

And the second audio signal is:

Among them, L is the left channel audio signal, R is the right channel audio signal, and n is the magnification. In different specific embodiments, n can be determined in advance according to needs, or can be adjusted by the user according to needs. In different specific embodiments, n can be a fixed value or can be remotely set.

Please refer to FIG. 5, which illustrates a system architecture diagram of another specific embodiment of a sound field-type natural environment sound effect system according to the present invention. As shown in the embodiment shown in Figure 5, the sound field type natural environment sound effect system 500 is a mono system, which includes a main channel front-end circuit 510, a first main channel playback device 520, and a first sub-signal circuit 540 And the first sound field controls the playback device 550. The main channel front-end circuit 510 is connected to the first main channel playback device 520, and the first sub-signal circuit 540 is connected to the first sound field control playback device 550.

In the embodiment shown in FIG. 5, the first main channel playback device 520 plays the main audio signal provided by the main channel front-end circuit 510. The main audio signal is obtained by mixing a left channel audio signal and/or a right channel audio signal. In a specific embodiment, the left channel audio signal and the right channel audio signal are received by the main channel front-end circuit 510. In a specific embodiment, the main audio signal is obtained by mixing the left channel audio signal and the right channel audio signal by the main channel mixer in the main channel front-end circuit 510. The first sub signal circuit 540 generates a first sub audio signal according to the left channel audio signal and the right channel audio signal, and the first audio field controls the playback device 550 to play the first sub audio signal. There is a first playback delay time between the playback of the first sub audio signal and the playback of the main audio signal. That is, the first sound field control playback device 550 plays the first sub audio signal after the first main channel playback device 520 plays the main audio signal, and then the first playback delay time passes. In a specific embodiment, the length of the first playback delay time is determined according to the control signal provided by the user. In a specific embodiment, the length of the first playback delay time is set according to the user's preference or the size of the audition environment or the factory default value. In a specific embodiment, the length of the first playback delay time is between 10 ms and 300 ms. In a specific embodiment, the sound field type natural environment sound effect system 500 is a mono system. It should be understood that the longer the playback delay time, the greater the audition environment and the greater the sound field performance.

In the embodiment shown in FIG. 5, the first sub audio signal played by the first sound field control playback device 550 is not mixed with the main audio signal by any mixing circuit or mixer. It should be understood that the main audio signal played by the first main channel playback device 520 and the first sub audio signal played by the first sound field control playback device 550 are naturally mixed in a natural environment after being played.

Please refer to Figure 6, which illustrates a schematic diagram of a specific embodiment of a sound field-type natural environment sound effect system according to the present invention. As shown in the embodiment shown in Figure 6, the sound field type natural environment sound effect system 600 is a mono system. The sound field type natural environment sound effect system 600 includes a main channel front-end circuit 610, a first main channel playback device 620, a first sub signal circuit 640, and a first sound field control playback device 650. Wherein, the main channel front-end circuit 610 is connected to the first main channel playback device 620, and the first sub-signal circuit 640 is connected to the first sound field control playback device 650. The main channel front-end circuit 610 has a main channel mixer 612 for mixing the left channel audio signal and the right channel audio signal to generate the main audio signal.

In the embodiment shown in FIG. 6, the first sub-signal circuit 640 includes a first subtracting operational amplifier 641, a first attenuator 643, a first high-pass filter 645, a first digital delay circuit 647, and a first amplifier 649. Among them, the first attenuator 643 is connected after the first subtraction operational amplifier 641, the first high-pass filter 645 is connected after the first attenuator 643, the first digital delay circuit 647 is connected after the first high-pass filter 645, and the first After the amplifier 649 is connected to the first digital delay circuit 647, the first amplifier 649 is also connected to the first sound field control playback device 650. In a specific embodiment, since the first sound field control playback device 650 has a low-pass filter function, there is no need to install a low-pass filter between the first amplifier 649 and the first sound field control playback device 650.

其中，L為左聲道音頻訊號，R為右聲道音頻訊號，n為放大倍數。在不同具體實施例中，n可視需求而預先決定，或可由使用者依需求而自行調整。在不同具體實施例中，n可為固定值，或可遙控設定。In a specific embodiment, the first secondary audio signal is:

Among them, L is the left channel audio signal, R is the right channel audio signal, and n is the magnification. In different specific embodiments, n can be determined in advance according to needs, or can be adjusted by the user according to needs. In different specific embodiments, n can be a fixed value or can be remotely set.

Please refer to the seventh figure, which illustrates a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system according to the present invention. As shown in the embodiment shown in the seventh figure, the sound field type natural environment sound effect system 700 is a mono system. Among them, the sound field type natural environment sound effect system 700 includes a main channel front-end circuit 710, a first main channel playback device 720, a first sub-signal circuit 740, and a first sound field control playback device 750. Wherein, the main channel front-end circuit 710 is connected to the first main channel playback device 720, and the first sub-signal circuit 740 is connected to the first sound field control playback device 750. The main channel front-end circuit 710 has a main channel mixer 712 for mixing the left channel audio signal and the right channel audio signal to generate the main audio signal.

In the embodiment shown in FIG. 7, the first sub-signal circuit 740 includes a first subtracting operational amplifier 741, a first attenuator 743, a first high-pass filter 745, a first digital delay circuit 747, and a first amplifier 749. Among them, the first attenuator 743 is connected after the first subtraction operational amplifier 741, the first high-pass filter 745 is connected after the first attenuator 743, the first digital delay circuit 747 is connected after the first high-pass filter 745, and the first The amplifier 749 is connected after the first digital delay circuit 747, and the first amplifier 749 is also connected to the first sound field control playback device 750. In a specific embodiment, since the first sound field control playback device 750 has a low-pass filter function, there is no need to install a low-pass filter between the first amplifier 749 and the first sound field control playback device 750.

Please refer to the eighth figure, which illustrates a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system according to the present invention. As shown in the embodiment shown in FIG. 8, the first main channel playback device 820 of the sound field type natural environment sound effect system 800 has a first playback direction 822, and the first sound field control playback device 850 has a second playback direction 852. Wherein, the angle 890 between the first playing direction and the second playing direction is 95 degrees.

Please refer to FIG. 9, which illustrates a schematic diagram of a specific embodiment of a sound field type natural environment sound effect system according to the present invention. As shown in the embodiment shown in Figure 9, the first main channel playback device 920 of the sound field type natural environment sound effect system 900 has a first playback direction 922, the first sound field control playback device 950 has a second playback direction 952, The main channel playback device 930 has a third playback direction 932, and the second sound field control playback device 970 has a fourth playback direction 972. The angle 992 between the first playing direction 922 and the second playing direction 952 is 95 degrees, and the angle 994 between the third playing direction 932 and the fourth playing direction 972 is 95 degrees.

It should be understood that the eighth figure and the ninth figure are only examples here, and the angle between the first playback direction and the second playback direction is not only 95 degrees, but can be set to different angles as required, but may be greater than 45 degrees. Preferably, this can prevent the frequency response of the first main channel playback device from being affected by the frequency response of the first sound field control playback device. Similarly, the angle between the third playback direction and the fourth playback direction is not only 95 degrees, but can be set to different angles according to requirements, but it is better to be greater than 45 degrees, which can avoid the second main channel playback The frequency response of the device is affected by the frequency response of the second sound field controlling the playback device. It should be understood that if the angle between the first playback direction and the second playback direction is less than 45 degrees, the dustproof part of the first sound field control playback device should be made of wool felt material to limit the horizontal orientation of the first sound field control playback device Features, and reduce its interference to the main channel playback device.

In a specific embodiment, the sound field control playback device can be quickly produced using 3D printing technology to greatly reduce the research and development cost. The sound field control playback device can use a high rigid plastic frame (Pelvic Shell) to avoid the problem. High frequency resonance, and improve the sound quality. In a specific embodiment, the effective frequency band of the frequency response of the sound field control playback device is limited to 500HZ~8KHZ-3dB. In a specific embodiment, the voice coil of the sound field control playback device is made of Kraft Paper Voice Coil, and the dustproof part is made of wool felt. In a specific embodiment, the sound field control playback device adopts a miniaturized design. Therefore, the sound field control playback device has a plastic box frame (Frame) or an iron box frame, a kraft paper voice coil, and a woollen felt cap (Woollen Felt Cap), And limit the high frequency response.

Please refer to FIG. 10, which illustrates a schematic diagram of a specific embodiment of a sound field-type natural environment sound effect system according to the present invention. As shown in the embodiment shown in FIG. 10, the angle 1092 between the first playback direction 1022 of the first main channel playback device 1020 and the second playback direction 1052 of the first sound field control playback device 1050 is greater than 45 degrees. In addition, the first sound field control playback device 1050 has a wool felt dustproof part 1056.

Please refer to Figure 11, which illustrates a schematic diagram of a specific embodiment of a sound field control playback device. As shown in the embodiment shown in FIG. 11, the sound field control playback device 1100 includes a wool felt dustproof portion 1102, a paper basin 1104, a voice coil 1106, a kraft paper voice coil 1108, and vibration EVA (vibration EVA) 1110, speaker terminal hole 1112, damper 1114, vibration EVA 1116, anti-resonance vent 1118, pelvic shell 1120, and internal magnetic type Magnetic circuit (internal magnetic circuit) 1122. Among them, the wool felt dustproof portion 1102 and the kraft paper voice coil 1108 form a low-pass filter, and the sound field control playback device 1100 achieves the low-pass filter function by this. In different embodiments, the basin frame 1120 can be made of iron or plastic.

It should be understood that the sound field type natural environment sound effect system of the present invention can be used in a special TV speaker system, a soundbar system, a sound system or various types of radio systems, but is not limited to this.

So far, the sound field type natural environment sound effect system of the present invention has been described by the above description and drawings. However, it should be understood that the specific embodiments of the present invention are for illustrative purposes only, and various changes can be made without departing from the scope and spirit of the patent application of the present invention, and should be included in the patent scope of the present invention. Therefore, the specific embodiments described in this specification are not intended to limit the present invention, and the true scope and spirit of the present invention are disclosed in the scope of the following patent applications.

100: Sound field type natural environment sound system 110: Main channel front-end circuit 120: The first main channel playback device 130: The second main channel playback device 140: The first signal circuit 150: The first sound field controls the playback device 160: The second signal circuit 170: The second sound field controls the playback device 200: Sound field type natural environment sound system 210: Main channel front-end circuit 220: The first main channel playback device 230: The second main channel playback device 240: The first signal circuit 241: The first subtraction operational amplifier 243: first attenuator 245: The first high pass filter 247: The first digital delay circuit 249: first amplifier 250: The first sound field controls the playback device 260: The second signal circuit 261: Adding operational amplifier 263: second attenuator 265: second high pass filter 267: The second digital delay circuit 269: second amplifier 270: The second sound field controls the playback device 300: Sound field type natural environment sound system 310: Main channel front-end circuit 320: The first main channel playback device 330: Second main channel playback device 340: The first signal circuit 341: The first subtraction operational amplifier 343: first attenuator 345: The first high pass filter 347: The first digital delay circuit 349: first amplifier 350: The first sound field controls the playback device 360: The second signal circuit 361: second subtraction operational amplifier 363: second attenuator 365: second high pass filter 367: The second digital delay circuit 369: second amplifier 370: The second sound field controls the playback device 400: Sound field type natural environment sound system 410: Main channel front-end circuit 420: The first main channel playback device 430: Second main channel playback device 440: The first signal circuit 441: The first subtraction operational amplifier 443: first attenuator 445: The first high pass filter 447: The first digital delay circuit 449: first amplifier 450: The first sound field controls the playback device 460: The second signal circuit 461: second subtraction operational amplifier 463: second attenuator 465: second high pass filter 467: The second digital delay circuit 469: second amplifier 470: The second sound field controls the playback device 500: Sound field type natural environment sound system 510: Main channel front-end circuit 520: The first main channel playback device 540: The first signal circuit 550: The first sound field controls the playback device 600: Sound field type natural environment sound system 610: Main channel front-end circuit 612: Main channel mixer 620: The first main channel playback device 640: The first signal circuit 641: The first subtraction operational amplifier 643: first attenuator 645: The first high-pass filter 647: The first digital delay circuit 649: first amplifier 650: The first sound field controls the playback device 700: Sound field type natural environment sound system 710: Main channel front-end circuit 712: Main channel mixer 720: The first main channel playback device 740: The first signal circuit 741: The first subtraction operational amplifier 743: first attenuator 745: The first high-pass filter 747: The first digital delay circuit 749: first amplifier 750: The first sound field controls the playback device 800: Sound field type natural environment sound system 820: The first main channel playback device 822: First playback direction 850: The first sound field controls the playback device 852: Second playback direction 890: angle 900: Sound field type natural environment sound system 920: The first main channel playback device 922: First Play Direction 930: Second main channel playback device 932: Third Play Direction 950: The first sound field controls the playback device 952: Second playback direction 970: The second sound field controls the playback device 972: Fourth Play Direction 992: angle 994: angle 1020: The first main channel playback device 1022: First playback direction 1050: The first sound field controls the playback device 1052: Second playback direction 1056: Wool felt dustproof department 1092: angle 1100: Sound field control playback device 1102: Wool felt dustproof department 1104: paper cone 1106: voice coil 1108: Kraft paper voice coil 1110: Shockproof EVA 1112: Horn terminal hole 1114: Bouncing 1116: Shockproof EVA 1118: Anti-resonance vent 1120: basin stand 1122: Internal magnetic type magnetic circuit

The first figure is a system architecture diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The second figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The third figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The fourth figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The fifth figure is a system architecture diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The sixth figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The seventh figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

Figure 8 is a schematic diagram of a specific embodiment of the sound field-type natural environment sound effect system of the present invention.

The ninth figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

The tenth figure is a schematic diagram of a specific embodiment of the sound field type natural environment sound effect system of the present invention.

Figure 11 is a schematic diagram of a specific embodiment of a sound field control playback device.

without

100: Sound field type natural environment sound system

110: Main channel front-end circuit

120: The first main channel playback device

130: The second main channel playback device

140: The first signal circuit

150: The first sound field controls the playback device

160: The second signal circuit

170: The second sound field controls the playback device

Claims (16)

A sound field type natural environment sound effect system, including: A first main channel playback device, which plays a main audio signal, the main audio signal is generated based on a left channel audio signal and/or a right channel audio signal; A first sub-signal circuit that generates a first sub-audio signal according to the left-channel audio signal and the right-channel audio signal; and A first audio field control playback device, connected to the first sub signal circuit, and playing the first sub audio signal; There is a first play delay time between the play of the first sub audio signal and the play of the main audio signal; Wherein, the first sub audio signal played by the first sound field control playback device is not mixed with the main audio signal by a first mixing circuit. For the sound field type natural environment sound effect system described in item 1 of the scope of patent application, the main audio signal is mixed by a main channel mixer to mix the left channel audio signal and the right channel audio signal. have to. The sound field type natural environment sound effect system described in item 1 of the scope of patent application, wherein the main audio signal played by the first main channel playback device and the first sub-audio signal played by the first sound field control playback device The audio signal is mixed in the natural environment after being played. The sound field type natural environment sound effect system described in the first item of the scope of patent application, wherein the first main channel playback device has a first playback direction, and the first sound field control playback device has a second playback direction. The angle between the first playing direction and the second playing direction is greater than 45 degrees. For the sound field type natural environment sound effect system described in item 1 of the scope of patent application, the first auxiliary signal circuit includes: A first subtraction operational amplifier; A first attenuator connected after the first subtracting operational amplifier; A first high-pass filter connected after the first attenuator; A first digital delay circuit connected after the first high-pass filter; and A first amplifier is connected after the first digital delay circuit. The sound field type natural environment sound effect system described in the first item of the scope of patent application, wherein the first sound field control playback device has a low-pass filter function. The sound field type natural environment sound effect system described in item 1 of the scope of patent application, wherein the first sound field control playback device has a first wool felt dustproof part and a first kraft paper voice coil, and the first sound field controls playback The device uses the first wool felt dustproof part and the first kraft paper voice coil to achieve the low-pass filtering function. In the sound field-type natural environment sound effect system described in item 1 of the scope of patent application, the length of the first playback delay time is determined according to a control signal provided by a user. The sound field type natural environment sound effect system described in item 1 of the scope of patent application further includes: A second main channel playback device, which plays the right channel audio signal; A second sub signal circuit, which generates a second sub audio signal according to the left channel audio signal and the right channel audio signal; and A second audio field control playback device, connected to the second sub signal circuit, and playing the second sub audio signal; The main audio signal is the left channel audio signal; There is a second playback delay time between the playback of the second sub audio signal and the playback of the right channel audio signal; Wherein, the second sub audio signal played by the second sound field control playback device is not mixed with the main audio signal and/or the right channel audio signal by a second mixing circuit. The sound field type natural environment sound effect system described in item 9 of the scope of patent application, wherein the right channel audio signal played by the second main channel playback device and the second sound field control playback device played by the second sound field The two audio signals are mixed in the natural environment after being played. The sound field type natural environment sound effect system described in item 9 of the scope of patent application, wherein the second main channel playback device has a third playback direction, the second sound field control playback device has a fourth playback direction, and The angle between the third playing direction and the fourth playing direction is greater than 45 degrees. As described in item 9 of the scope of patent application, the sound field type natural environment sound effect system, wherein the second sub-signal circuit includes: A second subtracting operational amplifier; A second attenuator connected after the second subtracting operational amplifier; A second high-pass filter connected after the second attenuator; A second digital delay circuit connected after the second high-pass filter; and A second amplifier is connected after the second digital delay circuit. As described in item 9 of the scope of patent application, the sound field type natural environment sound effect system, wherein the second sub-signal circuit includes: One-adding operational amplifier; A second attenuator connected after the second subtracting operational amplifier; A second high-pass filter connected after the second attenuator; A second digital delay circuit connected after the second high-pass filter; and A second amplifier is connected after the second digital delay circuit. The sound field type natural environment sound effect system described in item 9 of the scope of patent application, wherein the second sound field control playback device has a low-pass filter function. The sound field type natural environment sound effect system described in item 14 of the scope of patent application, wherein the second sound field control playback device has a second wool felt dustproof part and a second kraft paper voice coil, and the second sound field controls the playback The device uses the second wool felt dustproof part and the second kraft paper voice coil to achieve the low-pass filtering function. For the sound field type natural environment sound effect system described in item 9 of the scope of patent application, the length of the second playback delay time is determined according to a control signal provided by a user.

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