CN117412224A - Method for realizing common construction of surround sound by externally connected Bluetooth sound box and self-contained sound box - Google Patents

Method for realizing common construction of surround sound by externally connected Bluetooth sound box and self-contained sound box Download PDF

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Publication number
CN117412224A
CN117412224A CN202311480589.5A CN202311480589A CN117412224A CN 117412224 A CN117412224 A CN 117412224A CN 202311480589 A CN202311480589 A CN 202311480589A CN 117412224 A CN117412224 A CN 117412224A
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CN
China
Prior art keywords
sound
calibration
sound box
projector
box
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CN202311480589.5A
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Chinese (zh)
Inventor
曹俭
黄晓斌
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Sichuan Qiruike Technology Co Ltd
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Sichuan Qiruike Technology Co Ltd
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Priority to CN202311480589.5A priority Critical patent/CN117412224A/en
Publication of CN117412224A publication Critical patent/CN117412224A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Abstract

The invention discloses a method for realizing the common construction of surround sound by an external Bluetooth sound box and a self-contained sound box, wherein the purposes of simultaneously playing different sound channels of audio by the external sound box and the self-contained sound box are achieved by identifying the volume and delay of the external sound box and calibrating the volume and delay of the self-contained sound box, thereby realizing the playing effect of low-cost surround sound; the projector can be combined with the stereo sound box of the projector by the external stereo sound box, so that the surround sound effect can be realized, the cost threshold and the installation technical threshold for building surround sound are reduced, and the functional utilization rate of the loudspeaker box of the projector is improved.

Description

Method for realizing common construction of surround sound by externally connected Bluetooth sound box and self-contained sound box
Technical Field
The invention relates to the technical field of household intelligent projectors and intelligent televisions, in particular to a method for realizing the common construction of surround sound by an external Bluetooth sound box and a self-contained sound box.
Background
With home projectors, especially micro-projection with LEDs as light sources, a large number of people enter into ordinary households to play a role of a second screen of the household, and meanwhile, the cost and the selling price are also drastically reduced, so that many people install the projectors in bedrooms with smaller space. Because of the cost and space limitation, most consumers cannot construct a large-scale surround sound home cinema system, only the sound box of the projector or the external low-cost stereo Bluetooth sound box can not play the multi-channel surround sound effect of the film, and the film watching effect is influenced.
Disclosure of Invention
The invention aims to solve the problems and provide a method for realizing the common construction of a surround sound by an external Bluetooth sound box and a self-contained sound box. The method can be widely applied to intelligent projectors or intelligent televisions.
The invention realizes the above purpose through the following technical scheme:
the method for realizing the common construction of the surround sound by the external Bluetooth sound box and the self-contained sound box comprises the following steps:
step 1, a user connects a projector with a set of Bluetooth stereo sound boxes, and installs the projector at the front position of a projection screen, wherein the Bluetooth sound boxes comprise 2CH,2.1CH and 3.1CH sound boxes;
step 2, checking or opening an external Bluetooth sound box and a local sound box on an APP menu to form a surround sound function, and entering a function setting guide page; meanwhile, when the external Bluetooth sound box is opened, the audio channel of the local sound box is not closed, so that the Bluetooth stereo sound box and the local sound box can produce sound at the same time;
step 3, calibrating the volume to ensure that the hearing volume of the two sound boxes at the user position is consistent; the volume calibration is divided into automatic calibration and manual calibration, the user uses the automatic calibration firstly, then the manual calibration is used for fine adjustment, and finally the data is stored;
step 4, carrying out sound synchronous calibration, wherein the sound synchronous calibration is also divided into automatic calibration and manual calibration, and a user firstly uses the automatic calibration and then carries out fine adjustment through the manual calibration;
step 5, performing audio and video calibration, wherein the audio and video calibration is performed manually in the player through the remote controller in a way of changing the playing delay of the video, so that the synchronization and the volume of the calibrated external Bluetooth sound box and the calibrated local sound box are ensured not to be changed;
step 6, the user downloads a video file of the built-in multi-channel surrounding stereo sound track through the Internet, and plays the video file on the projector by using a system player; after the stereo track is automatically decoded by the system player, the sub-channels are pushed to different sound boxes, so that a user can hear the surround stereo audio effect.
In a further scheme, in the step 3, the specific operation method of automatic calibration is as follows:
inputting a distance A between a person and a Bluetooth sound box, a distance B between the Bluetooth sound box and a projector and a distance C between the person and the projector in a setting menu of a guide page;
the projector sequentially plays the 1kHz sound calibration signals with three fixed volumes of high, medium and low, so that the external Bluetooth sound box plays the sound, and then the projector is utilized to receive the played sound by a microphone with the projector, so that the sound loudness is obtained.
The sound intensity which can be heard by a viewer is estimated through the relation between the distance B and the distance A, then the volume of the playing required by the local loudspeaker box is estimated through the distance C, and the specific estimation method and the intensity are required to write the actual measurement data into software in a laboratory according to the relation between the air sound attenuation and the distance.
In a further scheme, in the step 3, the specific operation method of manual calibration is as follows: after automatic calibration, the external Bluetooth sound box and the projector local sound box play sound calibration signals alternately every 1 second in turn, and a viewer subjectively judges the volume of the two sound boxes, and manually adjusts the volume difference by using a remote controller.
In a further scheme, in the step 3, a specific operation method for storing volume data is as follows: after calibration is finished, the system stores the calibration volume; if the volume is adjusted during playing, the two sound boxes use different volume adjustment strategies, so that the listening feeling is consistent during playing of different volumes.
In a further scheme, in the step 4, the specific operation method of automatic calibration is as follows: the projector plays a 1kHz sound calibration signal with fixed volume, so that an external Bluetooth sound box plays the sound, and then the projector receives playing sound by using a microphone of the projector to acquire sound delay; the self playing sound is delayed, and the same delay as Bluetooth sound is ensured.
In a further scheme, in the step 4, the specific manual calibration operation method is as follows: after automatic calibration, the external Bluetooth sound box and the projector local sound box simultaneously play sound calibration signals in turn at intervals of 1 second; the viewer subjectively judges the synchronous delay of the two sound boxes, and manually adjusts the delay difference by using a remote controller.
In a further scheme, in the step 4, the specific operation method for data storage is as follows: after calibration, the system stores the calibrated sound delay, and the size of the sound delay is adjusted when the video is played.
The invention has the beneficial effects that:
the method for realizing the common construction of the surround sound by the external Bluetooth sound box and the self-contained sound box achieves the aim of simultaneously playing different sound channels of the audio by the external sound box and the local sound box through identifying the volume and the delay of the external sound box and calibrating the volume and the delay of the local sound box, thereby realizing the playing effect of the surround sound with low cost; the projector can be combined with the stereo sound box of the projector by the external stereo sound box, so that the surround sound effect can be realized, the cost threshold and the installation technical threshold for building surround sound are reduced, and the functional utilization rate of the loudspeaker box of the projector is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the practical drawings required in the embodiments or the prior art description, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a schematic diagram of the synchronous calibration of playing and sound, sound and picture according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In any embodiment, as shown in fig. 1, the method for implementing the method for jointly constructing surround sound by the external bluetooth speaker and the self-contained speaker of the present invention can be integrated in a system function menu as a system application by a software mode, or exist in the form of an independent player APP, and the specific steps are as follows:
1. the projector is connected with a stereo Bluetooth sound box through Bluetooth, and can be a 2CH,2.1CH or 3.1CH sound box.
2. The method comprises the steps of hooking or opening an external Bluetooth sound box and a local sound box on an APP menu to form a surround sound function, and entering a function setting guide page; meanwhile, when the external Bluetooth sound box is opened, the audio channel of the local sound box is not closed, so that the Bluetooth stereo sound box and the local sound box can produce sound simultaneously.
3. Because the size and the power of the external Bluetooth sound box are uncertain, the sound size of the external Bluetooth sound box is inconsistent with that of the local sound box, and volume calibration is needed, so that the hearing volume of the two sound boxes at the user position is kept consistent. The volume calibration is divided into automatic calibration and manual calibration, a user can use the automatic calibration firstly, then the manual calibration is used for fine adjustment, and finally the data is stored;
(1) The principle of automatic calibration is that the size of a standard sound signal played by an external sound box is identified through a microphone of the self-powered speaker, and then the volume played by the self-powered speaker is calculated according to the distance relation. The specific operation method is as follows:
the distance (A) between the person and the Bluetooth sound box, the distance (B) between the Bluetooth sound box and the projector, and the distance (C) between the person and the projector need to be input into a setting menu of the guide page, and the distance (A) between the person and the Bluetooth sound box and the distance (B) between the Bluetooth sound box and the projector are shown in FIG. 2;
the projector sequentially plays the 1kHz sound calibration signals with three fixed volumes of high, medium and low, so that the external Bluetooth sound box plays the sound, and then the projector is utilized to receive the played sound by a microphone with the projector, so that the sound loudness is obtained.
The sound intensity which can be heard by a viewer is estimated through the relation between the distance B and the distance A, then the volume of the sound which is required to be played by the local loudspeaker box is estimated through the distance C, and the specific estimation method and the specific intensity are that actually measured data are written in software in a laboratory according to the relation between the air sound attenuation and the distance, and the laboratory test data are shown in the following table.
A (Rice) B (Rice) C (Rice) Standard signal volume Receiving volume (dB) Adjusting the local volume value
3.0 3.5 1.5 Volume of 75% 50 60％
3.0 3.5 1.5 Volume of 50% 40 50％
3.0 3.5 1.5 Volume of 25% 30 35％
...
(2) Manual calibration
After automatic calibration, the external Bluetooth sound box and the projector local sound box play sound calibration signals alternately every 1 second in turn, and a viewer subjectively judges the volume of the two sound boxes, and manually adjusts the volume difference by using a remote controller;
(3) Volume data preservation
After the calibration is finished, the system stores the calibration volume. If the volume is adjusted during playing, the two sound boxes use different volume adjustment strategies, so that the listening feeling is consistent during playing of different volumes.
4. Because the sound synchronization of the external Bluetooth sound box is inconsistent with that of the local sound box, the external Bluetooth sound box has certain delay normally, the sound synchronization calibration is required, the sound synchronization calibration is also divided into automatic calibration and manual calibration, and a user can use the automatic calibration first and then perform fine adjustment through the manual calibration.
(1) The principle of automatic calibration is that the standard sound signal delay played by an external sound box is identified through a microphone of the self-contained sound box, and then the delay played by the sound box of the self-contained sound box is regulated, so that the hearing of the two sound boxes is kept synchronous. The specific operation method is as follows:
the projector plays a 1kHz sound calibration signal with fixed volume, so that the external Bluetooth sound box plays the sound, and then the projector receives playing sound by using a microphone of the projector, so as to acquire sound delay.
Delaying the self-played sound to ensure that the delay is the same as that of Bluetooth sound;
(2) Manual calibration
After automatic calibration, an external Bluetooth sound box and a projector local sound box play sound calibration signals in turn at intervals of 1 second, and a viewer subjectively judges the synchronous delay of the two sound boxes, and manually adjusts the delay difference by using a remote controller;
(3) Data preservation
After calibration is completed, the system saves the calibrated sound delay. The delay of sound can be adjusted when playing video
5. After the sound synchronization calibration, the sound playing may have a certain delay compared with the video picture, and the sound and picture calibration is required. The audio and video calibration is manually calibrated in the player through the remote controller, and the calibration mode is to change the playing delay of the video, so that the synchronization and the volume of the calibrated external Bluetooth sound box and the calibrated local sound box are ensured not to be changed.
6. After all calibration is finished, a section of built-in test film fragment is played, after the system decodes the audio frequency into 5.1 sound channels, the front, front left, front right and bass 3.1 sound channels are pushed to an external Bluetooth sound box for playing, and the rear 2 sound channels are pushed to the left and right sound channels of the local sound box for playing. After the test film is played, the whole setting flow is finished; after a user normally watches a film and plays the film by using a system player and turns on an analog surround sound switch, the system can decode the audio of a designated audio track in the video and then respectively push the audio to a Bluetooth sound box and an external sound box for playing, so that the surround sound effect can be realized.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims (7)

1. The method for realizing the common construction of the surround sound by the external Bluetooth sound box and the self-contained sound box is characterized by comprising the following steps:
step 1, a user connects a projector with a set of Bluetooth stereo sound boxes, and installs the projector at the front position of a projection screen, wherein the Bluetooth sound boxes comprise 2CH,2.1CH and 3.1CH sound boxes;
step 2, checking or opening an external Bluetooth sound box and a local sound box on an APP menu to form a surround sound function, and entering a function setting guide page; meanwhile, when the external Bluetooth sound box is opened, the audio channel of the local sound box is not closed, so that the Bluetooth stereo sound box and the local sound box can produce sound at the same time;
step 3, calibrating the volume to ensure that the hearing volume of the two sound boxes at the user position is consistent; the volume calibration is divided into automatic calibration and manual calibration, the user uses the automatic calibration firstly, then the manual calibration is used for fine adjustment, and finally the data is stored;
step 4, carrying out sound synchronous calibration, wherein the sound synchronous calibration is also divided into automatic calibration and manual calibration, and a user firstly uses the automatic calibration and then carries out fine adjustment through the manual calibration;
step 5, performing audio and video calibration, wherein the audio and video calibration is performed manually in the player through the remote controller in a way of changing the playing delay of the video, so that the synchronization and the volume of the calibrated external Bluetooth sound box and the calibrated local sound box are ensured not to be changed;
step 6, the user downloads a video file of the built-in multi-channel surrounding stereo sound track through the Internet, and plays the video file on the projector by using a system player; after the stereo track is automatically decoded by the system player, the sub-channels are pushed to different sound boxes, so that a user can hear the surround stereo audio effect.
2. The method for realizing the co-construction of the external bluetooth speaker and the self-contained speaker for the surround sound according to claim 1, wherein in the step 3, the specific operation method for automatic calibration is as follows:
inputting a distance A between a person and a Bluetooth sound box, a distance B between the Bluetooth sound box and a projector and a distance C between the person and the projector in a setting menu of a guide page;
the projector sequentially plays the 1kHz sound calibration signals with three fixed volumes of high, medium and low, so that the external Bluetooth sound box plays the sound, and then the projector is utilized to receive the played sound by a microphone with the projector, so that the sound loudness is obtained.
The sound intensity which can be heard by a viewer is estimated through the relation between the distance B and the distance A, then the volume of the playing required by the local loudspeaker box is estimated through the distance C, and the specific estimation method and the intensity are required to write the actual measurement data into software in a laboratory according to the relation between the air sound attenuation and the distance.
3. The method for realizing the co-construction of the external bluetooth speaker and the self-contained speaker for the surround sound according to claim 1, wherein in the step 3, the specific manual calibration operation method is as follows: after automatic calibration, the external Bluetooth sound box and the projector local sound box play sound calibration signals alternately every 1 second in turn, and a viewer subjectively judges the volume of the two sound boxes, and manually adjusts the volume difference by using a remote controller.
4. The method for realizing the co-construction of the external bluetooth speaker and the self-contained speaker for the surround sound according to claim 1, wherein in the step 3, the specific operation method for storing the volume data is as follows: after calibration is finished, the system stores the calibration volume; if the volume is adjusted during playing, the two sound boxes use different volume adjustment strategies, so that the listening feeling is consistent during playing of different volumes.
5. The method for realizing the co-construction of the external bluetooth speaker and the self-contained speaker for the surround sound according to claim 1, wherein in the step 4, the specific operation method for automatic calibration is as follows: the projector plays a 1kHz sound calibration signal with fixed volume, so that an external Bluetooth sound box plays the sound, and then the projector receives playing sound by using a microphone of the projector to acquire sound delay;
the self playing sound is delayed, and the same delay as Bluetooth sound is ensured.
6. The method for realizing the co-construction of the external bluetooth speaker and the self-contained speaker for the surround sound according to claim 1, wherein in the step 4, the specific manual calibration operation method is as follows: after automatic calibration, the external Bluetooth sound box and the projector local sound box simultaneously play sound calibration signals in turn at intervals of 1 second; the viewer subjectively judges the synchronous delay of the two sound boxes, and manually adjusts the delay difference by using a remote controller.
7. The method for realizing the co-construction of the external bluetooth speaker and the self-contained speaker for the surround sound according to claim 1, wherein in the step 4, the specific operation method for data storage is as follows: after calibration, the system stores the calibrated sound delay, and the size of the sound delay is adjusted when the video is played.
CN202311480589.5A 2023-11-08 2023-11-08 Method for realizing common construction of surround sound by externally connected Bluetooth sound box and self-contained sound box Pending CN117412224A (en)

Priority Applications (1)

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CN202311480589.5A CN117412224A (en) 2023-11-08 2023-11-08 Method for realizing common construction of surround sound by externally connected Bluetooth sound box and self-contained sound box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311480589.5A CN117412224A (en) 2023-11-08 2023-11-08 Method for realizing common construction of surround sound by externally connected Bluetooth sound box and self-contained sound box

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CN117412224A true CN117412224A (en) 2024-01-16

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