CN116229697A - Method for searching remote controller, display system and storage medium - Google Patents
Method for searching remote controller, display system and storage medium Download PDFInfo
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- CN116229697A CN116229697A CN202310177457.9A CN202310177457A CN116229697A CN 116229697 A CN116229697 A CN 116229697A CN 202310177457 A CN202310177457 A CN 202310177457A CN 116229697 A CN116229697 A CN 116229697A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a method for searching a remote controller, a display system and a storage medium, wherein the method comprises the following steps: acquiring a first environmental sound wave signal through a remote controller; analyzing the first environmental sound wave signal to obtain a first analysis frequency; and sending out a reminding signal when the first analysis frequency at least comprises a preset target syllable frequency. The display system comprises a display terminal and a remote controller, wherein the display terminal is used for acquiring a remote controller retrieving instruction; extracting a first coded acoustic wave signal based on a remote controller retrieving instruction, wherein the first coded acoustic wave signal comprises a preset target syllable frequency; the display terminal plays the first coded sound wave based on the first coded sound wave signal; the remote controller is used for acquiring a first environmental sound wave signal, and analyzing the first environmental sound wave signal to acquire a first analysis frequency; and sending out a reminding signal when the first analysis frequency at least comprises a preset target syllable frequency. The invention can avoid the problem that the remote controller can not receive the retrieving instruction after the wireless connection between the remote controller and the display terminal is disconnected.
Description
Technical Field
The present invention relates to the field of remote controllers, and in particular, to a method, a display system, and a storage medium for searching a remote controller.
Background
The current common intelligent television remote controller is generally connected with a host computer such as a television and a projector by using a 2.4G private wireless protocol or a Bluetooth protocol, and generally has a voice recording function. The remote controller is generally characterized in that a host computer sends an instruction to the remote controller through a wireless connection channel, and after receiving the instruction, the remote controller makes a loudspeaker generate beeping sounds. But the 2.4G or Bluetooth wireless connection channel is not always connected with the host, and the remote controller is disconnected with the host in a wireless connection manner, so that the remote controller cannot respond to the finding instruction.
The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the invention and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by the present application without undue evidence prior to the present application.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for searching a remote controller, a display system and a storage medium, which can avoid the problem that the remote controller cannot receive a recovery instruction after the wireless connection between the remote controller and a display terminal is disconnected.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, the invention discloses a method for searching a remote controller, comprising the following steps: acquiring a first environmental sound wave signal through a remote controller; analyzing the first environmental sound wave signal to obtain a first analysis frequency; and sending out a reminding signal when the first analysis frequency at least comprises a preset target syllable frequency.
Preferably, the step of sending out a reminder signal when the parsing frequency at least includes a preset target syllable frequency includes:
when the first analysis frequency comprises a preset target syllable frequency, sending a reminding signal;
or when the first analysis frequency comprises a plurality of preset target syllable frequencies, sending out a reminding signal;
or when the first analysis frequency comprises a plurality of preset target syllable frequencies and the preset target syllable frequencies are arranged according to a preset time sequence, sending out a reminding signal.
Preferably, the step of acquiring the first environmental sound wave signal through the remote controller includes:
continuously recording sound through a remote controller to acquire a first environmental sound wave signal;
or when the wireless matching connection of the remote controller is detected to be in a disconnected state, continuously recording sound through the remote controller to acquire a first environmental sound wave signal;
or intermittently recording the sound waves at a preset period by the remote controller to acquire the first environmental sound wave signal.
Preferably, the step of acquiring the first environmental sound wave signal through the remote controller includes:
intermittently recording sound at a preset period through a remote controller to acquire a second environmental sound wave signal;
analyzing the second environmental sound wave signal to obtain a second analysis frequency;
when the second analysis frequency comprises a preset starting frequency, continuously recording sound through the remote controller to acquire a first environmental sound wave signal;
and when the first analysis frequency at least comprises a preset target syllable frequency, the step of sending out a reminding signal comprises the following steps:
when the first analysis frequency comprises a plurality of preset target syllable frequencies, sending out a reminding signal;
or when the first analysis frequency comprises a plurality of preset target syllable frequencies and the target syllable frequencies are arranged according to a preset time sequence, sending out a reminding signal.
Preferably, the initiation frequency is one of a plurality of the target syllable frequencies.
Preferably, the reminding signal comprises at least one of an acoustic signal, a luminous signal and a vibration signal.
In a second aspect, the invention discloses a display system, comprising a display terminal and a remote controller, wherein:
the display terminal is used for acquiring a remote controller retrieving instruction; extracting a first coded acoustic wave signal based on a retrieval instruction of the remote controller, wherein the first coded acoustic wave signal comprises a preset target syllable frequency; the display terminal plays a first coded sound wave based on the first coded sound wave signal;
the remote controller is used for acquiring a first environmental sound wave signal, analyzing the first environmental sound wave signal and acquiring a first analysis frequency; and sending a reminding signal when the first analysis frequency at least comprises the preset target syllable frequency.
Preferably, the remote controller retrieving instruction includes remote controller model information, and the display terminal further extracts a second coded acoustic wave signal based on the remote controller retrieving instruction, where the second coded acoustic wave signal includes a starting frequency; the display terminal plays a second coded sound wave based on the second coded sound wave signal; the second coded sound wave and the first coded sound wave are alternately played, wherein the time length of each playing of the first coded sound wave is t1, and the time length of each playing of the second coded sound wave is t2; the first coded acoustic wave signal comprises a plurality of preset target syllable frequencies; the first coded acoustic wave signal and the second coded acoustic wave signal have corresponding relations with the remote controller model information;
the remote controller is used for acquiring a first environmental sound wave signal and comprises:
intermittently recording by the remote controller in a preset period to acquire a second environmental sound wave signal, wherein the preset period is T, the recording duration of the remote controller in each preset period T is K, T2 is more than T1 and more than K, T is more than T1+t2, and T is not equal to integer multiples of T1+t2;
analyzing the second environmental sound wave signal to obtain a second analysis frequency;
and when the second analysis frequency comprises the starting frequency, continuously recording sound through the remote controller to acquire a first environmental sound wave signal.
Preferably, the frequency of the first coded sound wave is between 2000Hz and 20000 Hz.
In a third aspect, the present invention discloses a storage medium having a computer program stored therein, wherein the computer program is configured to be run by a processor to perform the method of finding a remote control according to the first aspect.
Compared with the prior art, the invention has the beneficial effects that: according to the method for searching the remote controller, the acquired first environmental sound wave signal is analyzed only through the remote controller, and the reminding signal is sent out when the analyzed first analysis frequency is the preset target syllable frequency, namely, the remote controller recovery instruction is transmitted in a sound wave coding mode, so that the problem that the remote controller cannot receive the recovery instruction after the remote controller is connected with the display device in a wireless mode is solved. The display system provided by the invention is based on the fact that the display terminal sends out the coded sound wave, and the coded sound wave can carry specific frequency or frequency which is converted specifically along with time, so that the remote controller can match preset specific frequency data with the received signal, the remote controller can find back through frequency matching, the recognition precision is high, the possibility of false triggering is hardly generated, and the remote controller is not dependent on wireless connection of the remote controller and the display terminal.
In a further scheme, the invention has the following beneficial effects:
(1) The remote controller can record intermittently only, and then record continuously after analyzing the starting frequency, so that the power consumption of the remote controller is reduced to the greatest extent.
(2) The remote controller retrieving instruction is obtained through the display terminal, and the coded sound wave with specific codes is correspondingly played, wherein the display terminal can be a display device matched with the remote controller or any mobile terminal such as a mobile phone or a handheld computer, and the position of the first coded sound wave can be randomly replaced by sending the first coded sound wave through the mobile terminal, so that the covered remote controller can receive the sound wave more easily, and the efficiency of searching the remote controller is improved.
(3) The display terminal alternately plays the first coded sound wave with the frequency change and the second coded sound wave with the unique frequency, so that the remote controller can rapidly analyze the frequency in the second coded sound wave under the condition of intermittent recording so as to enable the remote controller to be switched into continuous recording, analysis times and analysis time are reduced to the greatest extent, and the power consumption of the remote controller is further reduced.
Drawings
FIG. 1 is a flow chart of a method for finding a remote control according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of a display system in accordance with a third disclosed embodiment of the invention;
FIG. 3 is a schematic diagram of a cycle period of a first encoded acoustic signal of varying frequency;
FIG. 4 is frame-energy discrete data for a target syllable frequency;
FIG. 5 is a schematic diagram of three positions where decoding begins;
FIG. 6 is a diagram of frequencies resolved from three position correspondences where decoding begins;
fig. 7 is a schematic diagram showing the relationship between the period of the encoded sound wave alternately played by the terminal and the recording period of the remote controller.
Detailed Description
The following describes embodiments of the present invention in detail. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for both the fixing action and the circuit/signal communication action.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
A typical large-screen display terminal such as a television or a projector has a speaker module, and a matched remote controller has a microphone module for voice recording. The invention utilizes the loudspeaker of the display terminal (the display terminal can be a television or a projector matched with a remote controller, and can also be a mobile terminal such as a mobile phone, a handheld computer and the like) to send out a sound wave signal with specific codes as a retrieval instruction, and the remote controller receives the sound wave signal through a microphone, analyzes the sound wave signal with specific codes, and then sends out reminding signals such as sound production through a buzzer and the like to respond to the retrieval instruction.
As shown in fig. 1, an embodiment of the present invention discloses a method for searching a remote controller, which is applied to the remote controller, and includes the following steps:
a1: acquiring a first environmental sound wave signal through a remote controller;
the method specifically comprises any one of the following substeps:
a. continuously recording sound through a remote controller to acquire a first environmental sound wave signal;
b. when the wireless matching connection of the remote controller is detected to be in a disconnected state, continuously recording sound through the remote controller to acquire a first environmental sound wave signal;
c. intermittently recording at a preset period by a remote controller to acquire a first environmental sound wave signal.
A2: analyzing the first environmental sound wave signal to obtain a first analysis frequency;
a3: and when the first analysis frequency at least comprises a preset target syllable frequency, sending out a reminding signal.
The method specifically comprises any one of the following substeps:
d. when the first analysis frequency comprises a preset target syllable frequency, sending out a reminding signal;
e. when the first analysis frequency comprises a plurality of preset target syllable frequencies, sending out a reminding signal;
f. when the first analysis frequency comprises a plurality of preset target syllable frequencies and the preset target syllable frequencies are arranged according to a preset time sequence, a reminding signal is sent out. In this way false triggers can be prevented to the greatest extent.
The reminding signal comprises at least one of an acoustic signal, a luminous signal and a vibration signal.
In this embodiment, the signal corresponding to the preset target syllable frequency included in the first ambient sound wave signal acquired by the remote controller may be sent by any display terminal (the display terminal may be a display device corresponding to the remote controller, or may be any mobile terminal such as a mobile phone, a handheld computer, or the like).
When the display terminal is an arbitrary mobile terminal, the mobile terminal may perform the steps of: receiving a remote controller retrieving instruction through the mobile terminal, wherein the remote controller instruction comprises a remote controller model; extracting a first coded acoustic wave signal based on a remote controller instruction, wherein the first coded acoustic wave signal has a corresponding relation with the model of the remote controller; the first encoded sound wave is played based on the first encoded sound wave signal. Because the mobile terminal can be held by a user to move, the user can easily change the position of the mobile terminal which is emitting the first coded sound wave, so that the covered remote controller can receive the sound wave more easily.
Wherein, in some embodiments, the step A1 may include the following steps:
a11: intermittently recording sound at a preset period through a remote controller to acquire a second environmental sound wave signal;
a12: analyzing the second environmental sound wave signal to obtain a second analysis frequency;
a13: when the second analysis frequency comprises a preset starting frequency, continuously recording sound through the remote controller to acquire a first environmental sound wave signal; wherein the initiation frequency may be one of a plurality of target syllable frequencies.
Correspondingly, the step A3 is specifically a sub-step e or a sub-step f.
In a second embodiment, the present invention discloses a storage medium, in which a computer program is stored, where the computer program is configured to be executed by a processor to perform the steps in the above-described method implementation.
Alternatively, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.
As shown in fig. 2, a third embodiment of the present invention discloses a display system 100, which includes a display terminal 10 and a remote controller 20, wherein the display terminal 10 may be a display device corresponding to the remote controller, or may be any mobile terminal such as a mobile phone, a handheld computer, and the like. In which the step execution of one of the display terminal 10 and the remote controller 20 is not necessarily associated with the step execution of the other.
The display terminal 10 specifically performs the steps of:
b1: acquiring a remote controller retrieving instruction;
b2: extracting a first coded acoustic wave signal based on a remote controller retrieving instruction, wherein the first coded acoustic wave signal comprises a preset target syllable frequency;
b3: playing the first coded sound wave based on the first coded sound wave signal; wherein the frequency of the first encoded sound wave is between 2000Hz and 20000 Hz.
The remote controller 20 specifically performs the following steps:
c1: acquiring a first environmental sound wave signal;
c2: analyzing the first environmental sound wave signal to obtain a first analysis frequency;
and C3: and when the first analysis frequency at least comprises a preset target syllable frequency, sending out a reminding signal.
In a further embodiment of the present invention,
the remote controller retrieving instruction in the step B1 comprises remote controller model information;
step B2 further comprises: extracting a second coded acoustic wave signal based on a remote controller retrieving instruction, wherein the second coded acoustic wave signal comprises a starting frequency;
step B3 further comprises: the display terminal plays the second coded sound wave based on the second coded sound wave signal; the second coded sound wave and the first coded sound wave are alternately played, wherein the time length of each playing of the first coded sound wave is t1, and the time length of each playing of the second coded sound wave is t2; the first coded acoustic wave signal comprises a plurality of preset target syllable frequencies; the first coded acoustic wave signal and the second coded acoustic wave signal have corresponding relations with the model information of the remote controller;
correspondingly, the step C1 specifically includes:
c11: intermittently recording by the remote controller in a preset period to acquire a second environmental sound wave signal, wherein the preset period is T, the recording duration of the remote controller in each preset period T is K, T2 is more than T1 and more than K, T is more than T1 plus T2, and T is not equal to integer multiples of T1 plus T2; more preferably, T > t1+t2 > T/2;
and C12: analyzing the second environmental sound wave signal to obtain a second analysis frequency;
c13: when the second analysis frequency comprises the starting frequency, the remote controller is used for continuously recording sound to acquire the first environmental sound wave signal.
In this embodiment, before the first ambient sound wave signal is acquired to acquire the first analysis frequency, the second ambient sound wave signal needs to be acquired first in step C11 to analyze whether the ambient sound wave needs to be continuously recorded for performing the subsequent steps C1-C3, so that the problem that the endurance is greatly reduced due to the fact that the remote controller continuously records the sound wave all the time can be avoided.
The method for searching the remote controller provided by the embodiment of the invention further comprises the steps executed by the remote controller and the steps executed by the display terminal, but it should be noted that the execution of the steps of one of the remote controller and the display terminal is not necessarily related to the execution of the steps of the other.
The method for searching the remote controller provided by the embodiment comprises the following steps:
s1: after receiving a remote controller retrieving instruction, a display terminal (such as a projector or a television) plays a first coded sound wave with a specific code outwards through a loudspeaker;
the user can send a remote controller finding instruction to the display terminal through the mobile phone remote controller APP or the WeChat applet.
In one embodiment, the speaker of the display terminal may cyclically play the first encoded sound wave changed with the specific target syllable frequency, where the change of the target syllable frequency may enable the remote controller to more accurately analyze the remote controller retrieving instruction, and is not easily interfered by the outside. The specific target syllable frequency change specifically means that the first coded sound wave changes back and forth among a plurality of target syllable frequencies, that is, the plurality of target syllable frequencies carried by the first coded sound wave change sequentially in a period.
In another embodiment, the first encoded acoustic encoded signal may include only one target syllable frequency, and the remote control recognizes the target syllable frequency and considers that the remote control retrieving instruction has been received.
It should be noted that, in the sound wave emitted from the modulating loudspeaker, the system is modulated on the basis of a carrier wave (having a fixed frequency), and the frequency of the electric signal actually used for controlling the loudspeaker and the electric signal converted by the remote control microphone are both contained carrier frequency and target syllable frequency, but the invention only analyzes the sound wave based on the target syllable frequency.
The display terminal needs to send a signal (such as a sine wave signal) containing a target syllable frequency to the remote controller so that the remote controller can identify the signal containing the target syllable frequency, but the display terminal needs to control the loudspeaker module to sound through a discrete digital signal so as to convert an expected continuous signal into a digital signal which can be played by the equipment, so that the display terminal needs to acquire the digital signal capable of representing the sine wave signal, the digital signal comprises a sampling position (frame) and amplitude intensity (energy) corresponding to the sampling position, a series of discrete data of the frame-energy can approximately simulate the sine wave signal, the more the sine wave signal is accurate in the sampling position, the more clear and easy to identify finally emitted sound, and the display terminal controls the loudspeaker module to emit a first coded sound wave based on the acquired series of digital signals. Then, the remote controller analyzes the received sound wave and decodes the target syllable frequency in the sound wave.
The target syllable frequency to be carried in the specific coded first coded sound wave can be multiple, so that digital signals capable of representing sine waves of different target syllable frequencies are required to be obtained, namely, a large amount of corresponding frame-energy discrete data are obtained based on different target syllable frequencies, and then the frame-energy data under each target syllable frequency are sequentially arranged according to the size of the frame to form at least one cycle, and referring to fig. 3, the first coded sound wave signals with frequency change are controlled to be sent by a loudspeaker, and the digital signals can be preset in a display terminal and extracted when the display terminal receives a remote controller finding instruction.
The following further describes the sound wave encoder of the digital signal (i.e. how to form the aforementioned digital signal, which can be preset in the display terminal, without being executed after each time the remote control is instructed to retrieve):
in one embodiment, sine wave acoustic signals with different frequencies can be generated, or square wave signals can be generated, and the signals are played circularly according to a certain period. The energy value corresponding to each sampling point is not limited to the following form.
For example, the digital signal (frame-energy) characterizing a sine wave is formulated as follows:
the max_volume is the maximum loudness of the audio signal, and is used for adjusting the loudness (amplitude) of the audio signal generated last, so that the decoding success rate of the receiving end (remote controller end) has a great relationship with the loudness of the audio signal, and needs to be adjusted in the actual debugging process (for example, when the initial loudness is insufficient to make the remote controller parse, the user can increase the loudness through a mobile phone APP or a display terminal VOLUME key, etc.).
frame is the sampling point location (e.g., first sampling point, second sampling point …, digital signal formed based on different target syllable frequencies all have their own set of sampling points); sample_rate is the sampling rate (e.g., 44100 HZ), i.e., the number of sampling points a digital signal has per unit time; frequency is the target syllable frequency and unit_sample is the number of samples in a segment of sine wave (or each syllable).
As can be seen from the energy formula, the period of the digital signal corresponding to a target syllable frequency is:
T’＝sample_rate/frequency；
the frequency of the digital signal corresponding to a target syllable frequency:
F＝2*π*frequency/sample_rate；
the sampling rate sample_rate is generally defined as 44100HZ, and the number of sampling points unit_sample=duration in one syllable is 0.1×44100=4410 times, or it can be said that the number of corresponding discrete data (frames-intervals) in one syllable, so that each syllable emitted by the speaker of the display terminal will be sufficiently clear to be helpful for being clearly received by the microphone of the remote controller.
Through the energy formula, corresponding time-domain sound wave data (frequency is F) can be generated based on the required target syllable frequency (frequency is frequency), and relevant parameters need to be adjusted according to equipment and environment characteristics in actual debugging (for example, a user can adjust through a mobile phone APP).
In practical application, the frequency response curves of the loudspeaker of the display terminal equipment such as a projector or a television and the pickup frequency of the MIC (microphone) of the remote controller are customized for the hearing range of a human ear, the hearing range of the human ear is 20HZ-20000HZ, and the low frequency band is relatively large in interference ratio by environmental noise, so that the range of 2000HZ-20000HZ of the high frequency band is preferably used as the frequency F value range of the sound wave coding signal.
In a cyclic digital signal composed of a large number of discrete data (frame-energy), including a plurality of syllables, referring to fig. 4, each syllable corresponds to a frequency F (such as 2000Hz, 3000Hz, 4000Hz, etc., and a sine wave syllable cyclic playing of 2000HZ 3000HZ 4000H 5000HZ frequency points can be defined in the present invention), and the duration of each syllable can be defined to be 0.1s. The loudspeaker module plays circularly based on the digital signal, so that the sound wave has specific coding. The frame-energy values for syllables of frequency F (e.g., 2000 HZ) are shown in FIG. 4. In a cyclic digital signal, frame-energy values of a plurality of segments of different frequencies F are continuously spliced.
In an analog signal composed of sine waves with multiple frequencies, for each sampling point and corresponding energy value (which can be calculated by the energy formula) in a cycle (see fig. 4), the analog signal is stored as a PCM file in a display terminal for cyclic playing. A 16 bit integer may be used to store data for one sample point.
S2: after receiving the first coded sound wave, a microphone of the remote controller analyzes the first coded sound wave signal to obtain a first analysis frequency;
the scheme aims at a remote controller with a MIC (microphone), the MIC of the remote controller is generally used for a far-field voice function to control a display terminal, and the MIC of the remote controller is generally used for starting recording after a user presses a voice key and transmitting recording data to the display terminal to be used as voice recognition. In the specific embodiment of the invention, the MIC of the remote controller can keep recording all the time in a non-voice key recording state, or keep recording after the remote controller is disconnected with the display terminal through Bluetooth, or intermittently record; and then the remote controller analyzes the sound wave coding information of the recording data.
The following is a further explanation of the mechanism of acoustic decoding of digital signals:
and circularly recording, analyzing frequency point syllables defined by a transmitting end (display terminal) from the time domain recording data through FFT (fast Fourier transform) operation, and temporarily storing the recorded audio data in a buffer area. The frequency point refers to a specific absolute frequency value, and is generally the center frequency of the modulated signal. After the decoding end (remote controller) decodes the frequency F of a syllable from the buffer region through FFT, the target syllable frequency carried in the syllable should be frequency =
F*sample_rate/(2*π)。
The frequency of the sine wave obtained by FFT operation has a certain error, and is generally determined to be within + -20 of the defined frequency points, so that the frequency of the target syllable can be determined, for example, 2000HZ, and the frequency of the target syllable can be considered to be matched after FFT operation between 1980 and 2020.
During decoding, audio data with a certain length is read from the audio data buffer area in a circulating way to perform FFT operation, the data length is called as analysis window length, and in the specific embodiment, the analysis length is equal to the syllable length of a transmitting end, namely 4410 sampling points are defined. The Fast Fourier Transform (FFT) functions to parse out the frequency domain information contained in the audio signal from one parsing window.
The position of starting decoding is random relative to the instruction syllable, and three starting analysis positions shown in fig. 5 can appear; it can be seen from the figure that the data in the current parsing window will contain data of the previous syllable or the next syllable in addition to the current syllable data.
The specific analysis algorithm is as follows: when the analysis window is divided from left to right through the target syllable, it is known from the equation of energy that the amplitude of the target syllable calculated by the FFT (amplitude intensity of the target syllable frequency) becomes larger and smaller. When the analysis window spans two syllable data, the adjacent target syllable frequencies corresponding to two different amplitudes are calculated through FFT operation, so that the signals of what target syllable frequency the syllable data in the analysis window contain can be known.
S3: when the first analysis frequency at least comprises a preset target syllable frequency (namely, when the first analysis frequency is consistent with the preset frequency in the remote controller), a reminding signal is sent out.
Specifically, a threshold value of the magnitude intensity of the target syllable frequency may be set, when the magnitude intensity of the first analysis frequency exceeds the threshold value, it indicates that the receiver (remote controller) detects the target syllable frequency, and when all the analyzed target syllable frequencies are found in a preset order, it indicates that the remote controller recovery command is analyzed.
As shown in fig. 6, the analysis window is defined to be scratched according to 1/5 syllable length (1/5 duration), that is, the position where the analysis window is located at the beginning is unknown, firstly, the audio data of the position where the analysis window is located is calculated by using FFT, after the data in the window is analyzed, the analysis is performed after the analysis is performed, the analysis is performed by moving 1/5 syllable length backwards, and the target syllable frequency exceeding the threshold is detected as follows:
[2000][2000][20003000][20003000][20003000]
[3000][3000][30004000][30004000][30004000]...
when four syllable frequencies 2000HZ 3000HZ 4000HZ 5000HZ are detected in sequence, it can be determined that a remote control retrieving instruction is received.
To prevent misidentification due to ambient acoustic interference, the remote control may be triggered again (e.g., beep) upon detection of 2-3 cycles.
The reminding signal sent by triggering the remote controller to retrieve action can also feed back the position of the remote controller to the user in a vibration mode besides the beeping sound, and the buzzer is not necessarily arranged on the remote controller at the moment.
Because the remote control uses a battery, the remote control can quickly consume electric energy if the remote control is kept in a recording state. In a further embodiment, the microphone of the remote controller intermittently records, the recording duration is controlled within a shorter time each time, and the recording period is controlled within a proper range; the display terminal plays the coded sound wave carrying the continuous recording instruction; the method can be realized by adopting any one of the following schemes.
Scheme 1: the continuous recording instruction may be any one of the target syllable frequencies of the first coded sound waves, and after the remote controller analyzes the target syllable frequency, continuous recording is performed, and then step S2 is performed to determine whether the first coded sound waves with alternating frequencies are received. Through intermittent recording, excessive power consumption caused by the fact that the remote controller always keeps a recording state when the display terminal does not play the coded sound waves can be avoided.
In the scheme, aiming at the fact that the first coded sound wave carries multiple target syllable frequencies, only the remote controller is intermittently enabled to acquire and analyze (reduce power consumption) external environment sound wave signals at first, when any target syllable frequency exists in the external environment sound wave signals, the remote controller is enabled to start continuous recording so as to analyze all the frequencies carried in the first coded sound wave (the sound wave is ensured to be used for retrieving by the remote controller, and false triggering is prevented).
Scheme 2: the continuous recording instruction may be a second coded sound wave (corresponding to time period t 2) that is played alternately with the first coded sound wave (corresponding to time period t 1) in step S1, where the second coded sound wave carries a single starting frequency (a digital signal for generating the second coded sound wave may be generated by the coding mechanism in step S2), and when the starting frequency is resolved by the remote controller, continuous recording is performed, and then step S2 is performed to determine whether the first coded sound wave is received.
In the scheme, the display terminal plays the second coded sound wave, so that the remote controller can also rapidly analyze the continuous recording instruction under the condition of intermittent recording, and meanwhile, the analysis times and analysis time are reduced, and the power consumption of the remote controller is further reduced.
Referring to fig. 7, the display terminal alternately plays: the second coded sound wave with time length t2 and only carrying a single frequency is played each time, and the first coded sound wave with time length t1 and meeting the multiple target syllable frequency changes in the step S2 is played each time.
The remote controller is provided with a timer, so that the remote controller records in a period T, the duration of each recording window is K, and T2 is more than T1 and more than K, so that the recording time of each recording time can be reduced; t is more than t1+t2, so that the recording interval period is longer, the power consumption is reduced, and the cruising ability of the remote controller is enhanced; and T is not equal to an integer multiple of t1+t2, preventing the possibility of recording only the second coded sound wave part at all times; and preferably, T is smaller than 2 (t1+t2), and T1 is smaller than T2, so that the remote controller can record the second coded sound wave more quickly.
After each recording, the audio data of an analysis window is read from the audio data buffer area to perform FFT operation, and the length of the analysis window can be set to be short, for example, less than 1/10 syllable because the frequency in the second coded sound wave is unique, so that the analysis time can be further reduced.
When the analyzed second analysis frequency is determined to be matched with the preset frequency in the remote controller, the remote controller is switched to continuous recording, and meanwhile, step S2 is executed on the audio data stored in the buffer area by the continuous recording, so that whether the first coded sound waves with the alternating frequencies are received or not is determined.
In each of the above further embodiments, the external environmental acoustic wave signal is intermittently acquired through the remote controller, so as to determine whether the external environmental acoustic wave signal is about correct, thereby reducing the power consumption effect, and reducing the power consumption of the remote controller in the aspects of acquiring acoustic waves and analyzing acoustic waves as much as possible.
The background section of the present invention may contain background information about the problem or environment of the present invention rather than the prior art described by others. Accordingly, inclusion in the background section is not an admission of prior art by the applicant.
The foregoing is a further detailed description of the invention in connection with specific/preferred embodiments, and it is not intended that the invention be limited to such description. It will be apparent to those skilled in the art that several alternatives or modifications can be made to the described embodiments without departing from the spirit of the invention, and these alternatives or modifications should be considered to be within the scope of the invention. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope as defined by the appended claims.
Claims (10)
1. A method of finding a remote control comprising the steps of:
acquiring a first environmental sound wave signal through a remote controller;
analyzing the first environmental sound wave signal to obtain a first analysis frequency;
and sending out a reminding signal when the first analysis frequency at least comprises a preset target syllable frequency.
2. The method of claim 1, wherein the step of sending a reminder signal when the resolution frequency includes at least a predetermined target syllable frequency comprises:
when the first analysis frequency comprises a preset target syllable frequency, sending a reminding signal;
or when the first analysis frequency comprises a plurality of preset target syllable frequencies, sending out a reminding signal;
or when the first analysis frequency comprises a plurality of preset target syllable frequencies and the preset target syllable frequencies are arranged according to a preset time sequence, sending out a reminding signal.
3. The method of claim 1, wherein the step of obtaining the first ambient sound signal by the remote control comprises:
continuously recording sound through a remote controller to acquire a first environmental sound wave signal;
or when the wireless matching connection of the remote controller is detected to be in a disconnected state, continuously recording sound through the remote controller to acquire a first environmental sound wave signal;
or intermittently recording the sound waves at a preset period by the remote controller to acquire the first environmental sound wave signal.
4. The method of claim 1, wherein the step of obtaining the first ambient sound signal by the remote control comprises:
intermittently recording sound at a preset period through a remote controller to acquire a second environmental sound wave signal;
analyzing the second environmental sound wave signal to obtain a second analysis frequency;
when the second analysis frequency comprises a preset starting frequency, continuously recording sound through the remote controller to acquire a first environmental sound wave signal;
and when the first analysis frequency at least comprises a preset target syllable frequency, the step of sending out a reminding signal comprises the following steps:
when the first analysis frequency comprises a plurality of preset target syllable frequencies, sending out a reminding signal;
or when the first analysis frequency comprises a plurality of preset target syllable frequencies and the target syllable frequencies are arranged according to a preset time sequence, sending out a reminding signal.
5. The method of claim 4, wherein the activation frequency is one of a plurality of the target syllable frequencies.
6. The method of claim 1, wherein the alert signal comprises at least one of an acoustic signal, a light signal, and a vibration signal.
7. A display system comprising a display terminal and a remote control, wherein:
the display terminal is used for acquiring a remote controller retrieving instruction; extracting a first coded acoustic wave signal based on a retrieval instruction of the remote controller, wherein the first coded acoustic wave signal comprises a preset target syllable frequency; the display terminal plays a first coded sound wave based on the first coded sound wave signal;
the remote controller is used for acquiring a first environmental sound wave signal, analyzing the first environmental sound wave signal and acquiring a first analysis frequency; and sending a reminding signal when the first analysis frequency at least comprises the preset target syllable frequency.
8. The display system of claim 7, wherein the remote control retrieval instruction includes remote control model information, and wherein the display terminal further extracts a second encoded acoustic signal based on the remote control retrieval instruction, the second encoded acoustic signal including a start frequency; the display terminal plays a second coded sound wave based on the second coded sound wave signal; the second coded sound wave and the first coded sound wave are alternately played, wherein the time length of each playing of the first coded sound wave is t1, and the time length of each playing of the second coded sound wave is t2; the first coded acoustic wave signal comprises a plurality of preset target syllable frequencies; the first coded acoustic wave signal and the second coded acoustic wave signal have corresponding relations with the remote controller model information;
the remote controller is used for acquiring a first environmental sound wave signal and comprises:
intermittently recording by the remote controller in a preset period to acquire a second environmental sound wave signal, wherein the preset period is T, the recording duration of the remote controller in each preset period T is K, T2 is more than T1 and more than K, T is more than T1+t2, and T is not equal to integer multiples of T1+t2;
analyzing the second environmental sound wave signal to obtain a second analysis frequency;
and when the second analysis frequency comprises the starting frequency, continuously recording sound through the remote controller to acquire a first environmental sound wave signal.
9. The display system of claim 7, wherein the first encoded sound wave has a frequency between 2000Hz and 20000 Hz.
10. A storage medium having a computer program stored therein, wherein the computer program is arranged to be run by a processor to perform the method of finding a remote control as claimed in any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310177457.9A CN116229697A (en) | 2023-02-28 | 2023-02-28 | Method for searching remote controller, display system and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310177457.9A CN116229697A (en) | 2023-02-28 | 2023-02-28 | Method for searching remote controller, display system and storage medium |
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| CN116229697A true CN116229697A (en) | 2023-06-06 |
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| CN202310177457.9A Pending CN116229697A (en) | 2023-02-28 | 2023-02-28 | Method for searching remote controller, display system and storage medium |
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