CN108391203B - Audio playing control method and device, audio playing equipment and system - Google Patents
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- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
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Abstract
The invention discloses an audio playing control method and device, audio playing equipment and a system, which are applied to an audio playing system, wherein the audio playing system comprises an audio playing device and an audio output device for outputting audio signals to the audio playing device for playing, and the audio playing control method comprises the following steps: detecting whether a power supply input end of an audio playing device is powered down or not, and outputting a power down detection signal when a power down signal of the power supply input end is detected; when the power failure detection signal is received, controlling the volume of the audio signal output by the audio output device to decrease according to the preset magnitude until the target volume value is reached; when the power supply input end is powered off, POP noise generated by the audio playing device caused by power failure can be avoided.
Description
Technical Field
The present invention relates to the field of audio technologies, and in particular, to an audio playing control method and apparatus, an audio playing device, and an audio playing system.
Background
The audio system is one of audio playing devices, and generally comprises an audio output end and an audio playing end, wherein the audio output end outputs an analog audio signal to the audio playing end for playing. However, in the process of controlling the audio playing end to output the audio signal by the audio output end, the audio playing end may have a condition that the power supply suddenly fails, and at this time, because the audio output end cannot know the power failure of the audio playing end, the audio output end continues to output the analog audio signal to the audio playing end, so that the analog audio signal input to the audio playing end changes suddenly, and the audio playing end generates POP noise.
Disclosure of Invention
The invention mainly aims to provide an audio playing control method and device, audio playing equipment and an audio playing control system, and aims to solve the technical problem that POP noise is generated by sound equipment due to sudden change of audio signals under the condition that the sound equipment is powered off.
In order to achieve the above object, the present invention provides an audio playing control method, applied to an audio playing system, where the audio playing system includes an audio playing device and an audio output device that outputs an audio signal to the audio playing device for playing, and the audio playing control method includes:
detecting whether a power supply input end of an audio playing device is powered down or not, and outputting a power down detection signal when a power down signal of the power supply input end is detected;
and when the power failure detection signal is received, controlling the volume of the audio signal output by the audio output device to decrease according to a preset size until a target volume value is reached.
Preferably, after the step of controlling the volume of the audio signal output by the audio output device to decrease according to a preset magnitude until the target volume value is reached when the power-down detection signal is received, the audio playback control method further includes:
and outputting a mute control signal to the audio playing device to control the audio playing device to mute.
The invention also provides an audio playing control device, which is applied to an audio playing system, and comprises an audio playing device and an audio output device for outputting audio signals to the audio playing device for playing, and the audio playing control device also comprises:
the power failure detection circuit is used for detecting whether the power supply input end of the audio playing device is powered down or not and outputting a power failure detection signal when a power failure signal of the power supply input end is detected;
and the control circuit is used for controlling the volume of the audio signal output by the audio output device to decrease progressively according to a preset size until the target volume value is reached when the power failure detection signal is received.
Preferably, after the step of controlling the volume of the audio signal output by the audio output device to decrease according to a preset magnitude until the target volume value is reached when the power-down detection signal is received, the control circuit is further configured to: and after controlling the volume of the audio signal output by the audio output device to be reduced to a target volume value, outputting a mute control signal to the audio playing device so as to control the audio playing device to mute.
Preferably, the power-down detection circuit includes a first voltage-dividing circuit, a switching circuit and a second voltage-dividing circuit, an input terminal of the first voltage-dividing circuit is electrically connected to the power input terminal, an output terminal of the first voltage-dividing circuit is electrically connected to an input terminal of the switching circuit, an output terminal of the switching circuit is electrically connected to an input terminal of the second voltage-dividing circuit, and an input terminal of the second voltage-dividing circuit is electrically connected to the control circuit.
Preferably, the first voltage dividing circuit includes a first resistor and a second resistor, one end of the first resistor is connected to the power input terminal, the other end of the first resistor is interconnected with one end of the second resistor, and the other end of the second resistor is grounded.
Preferably, the switch circuit comprises a first diode, a third resistor, a fourth resistor, a first capacitor and a first triode;
one end of the first diode is connected with the interconnection end of the first resistor and the second resistor, the other end of the first diode is connected with one end of the first capacitor, the other end of the first capacitor is grounded, one end of the third resistor is connected with one end of the first diode, which is connected with the first capacitor, the other end of the third resistor is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with one end of the first diode, which is connected with the second resistor;
the base electrode of the first triode is connected with one end of the third resistor and the fourth resistor, the emitting electrode of the first triode is connected with one end of the third resistor and the first capacitor, and the collecting electrode of the first triode is connected with the input end of the second voltage division circuit.
Preferably, the second voltage division circuit includes a fifth resistor and a sixth resistor, one end of the fifth resistor is connected to the collector of the first triode, the other end of the fifth resistor is interconnected with one end of the sixth resistor, and the other end of the sixth resistor is grounded;
one end of the fifth resistor and one end of the sixth resistor are connected with the control circuit.
In addition, the invention also provides an audio playing device, which comprises the audio playing control device.
The invention also provides an audio playing system, which comprises an audio playing device, an audio output device and the audio playing control device, wherein the audio output device outputs audio signals to the audio playing device for playing, the audio playing control device is electrically connected with the audio playing device, and the audio playing control device is connected with the audio output device in a wired or wireless mode.
One of the technical solutions has the following advantages or technical effects: the audio playing control device comprises an audio playing device and an audio output device which outputs audio signals to the audio playing device for playing, and when a power failure signal of a power supply input end of the audio playing device is detected, a power failure detection signal is output; when the power failure detection signal is received, the volume of the audio signal output by the audio output device is controlled to be decreased gradually according to the preset size until the target volume value is reached, and then when the power supply input end is suddenly powered down, the audio playing device can be enabled not to output the audio signal or output the audio signal close to the minimum value, so that POP noise generated by the audio playing device due to power failure can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flowchart illustrating an audio playback control method according to an embodiment of the present invention;
FIG. 2 is a block diagram of a circuit configuration of an audio playback control apparatus according to an embodiment of the present invention;
FIG. 3 is a block diagram of a circuit configuration of an embodiment of the audio playback device and the audio output device shown in FIG. 2;
FIG. 4 is a schematic circuit diagram of the power down detection circuit of FIG. 2;
FIG. 5 is a diagram illustrating an audio signal decrementing process according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Power |
20 | |
| 30 | |
40 | |
| 50 | Audio playing device | 101 | A first |
| 102 | |
103 | Second |
| 300 | |
301 | Analog-to- |
| 302 | Digital-to- |
500 | |
| 501 | |
60 | First radio module |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an audio playing control method for avoiding POP noise generated by an audio playing device caused by power failure.
Referring to fig. 1, the audio playback control method provided by the present invention includes:
s1: detecting whether a power supply input end of an audio playing device is powered down or not, and outputting a power down detection signal when a power down signal of the power supply input end is detected;
specifically, the audio playing device comprises a power amplifier circuit and a loudspeaker, wherein the power input end is connected with the power amplifier circuit, the power amplifier circuit is used for amplifying the audio signal input to the audio playing device, and the voltage input by the power input end is the power amplifier voltage input by the power amplifier circuit; and outputting a power failure detection signal when detecting that the power amplifier voltage input by the power supply input end is in power failure. It is easy to understand that the audio playing device can be a television, a stereo, and a device with an audio playing function.
S2: and when the power failure detection signal is received, controlling the volume of the audio signal output by the audio output device to decrease according to a preset size until a target volume value is reached.
The audio playing device and the audio output device are two different power supplies and power supply voltages, and the audio playing device and the audio output device control the volume of the audio signal to be decreased gradually according to the preset volume value by detecting whether the power supply input to the power amplifying circuit by the audio playing device is powered off or not and detecting the output power-off signal if the power supply input to the power amplifying circuit is powered off until the target volume value is reached.
The audio output device comprises an analog-to-digital converter, a digital signal processor and a digital-to-analog converter, wherein the analog-to-digital converter and the digital-to-analog converter are electrically connected with the digital signal processor and are used for processing an input audio signal and outputting the processed audio signal.
When the power failure detection signal is received, the digital signal processor performs volume decreasing processing on the digital analog audio signal output after the input audio signal is converted by the digital-to-analog converter until the volume reaches a target volume value, so that the digital audio signal output by the digital signal processor is the target volume value.
It should be noted that the target volume value is the minimum volume value or the volume value of 0, so that the audio signal output to the audio playing device does not generate POP noise due to amplification of the power amplifier circuit.
In the embodiment, whether a power-down signal is generated at the power input end of the audio playing device is detected, so that the volume of the audio signal output to the audio playing device by the audio output device is controlled to be decreased gradually according to the preset volume value until the target volume value is reached; when the power supply input end is powered off, the audio signal output to the audio playing device is made to be the target volume value after the input audio signal is processed by detecting the power-off signal, so that POP noise generated by the audio playing device due to power-off can be avoided.
In this embodiment, optionally, after the step S2 is executed: when the power failure detection signal is received, the volume of the audio signal output by the audio output device is controlled to decrease according to a preset size until a target volume value is reached, and the audio playing control method further comprises the following steps:
s3: and outputting a mute control signal to the audio playing device to control the audio playing device to mute.
It should be noted that when the power supply of the audio playing device and the voltage input by the power input end of the power failure detection signal are not the same, the audio playing device needs to be controlled to mute, so that POP noise generated by the audio playing device is further avoided, and the audio playing device can be muted to save power.
Referring to fig. 2, the present invention further provides an audio playing control device, which is applied to an audio playing system, and the audio playing control device includes an audio playing device 50 and an audio output device 30 that outputs an audio signal to the audio playing device 50 for playing; the audio playback control apparatus further includes:
the power failure detection circuit 10 is configured to detect whether the power supply input end 40 of the audio playing apparatus 30 has a power failure, and output a power failure detection signal when a power failure signal of the power supply input end 40 is detected;
and the control circuit 20 is configured to, when receiving the power failure detection signal, control the volume of the audio signal output by the audio output device 30 to decrease according to a preset magnitude until a target volume value is reached.
Further, referring to fig. 3, the audio output device 30 includes an analog-to-digital converter 301 for converting an input audio analog signal into a digital audio signal, a digital signal processor 300 for performing audio signal processing on the input digital audio signal, and a digital-to-analog converter 302 for converting the digital audio signal processed by the digital signal processor 300 into an analog audio signal, wherein the analog-to-digital converter 301 and the digital-to-analog converter 302 are electrically connected to the digital signal processor 300 for processing the input audio signal and outputting the processed audio signal; by processing the audio signal, the audio input to the audio playback device 50 is better quality and played by the audio playback device 50. In this embodiment, the audio output device 30 is configured to control the volume of the audio signal input to the digital signal processor 300 to decrease according to a preset value until the target volume value is reached, according to the power-down signal received by the control circuit 20.
The audio playing device 50 includes a power amplifier circuit 500 and a speaker 501, the power amplifier circuit 500 is electrically connected to the speaker 501, the power failure detection circuit 10 detects the power amplifier voltage input to the power amplifier circuit 500, the power amplifier circuit 500 is used for amplifying the audio signal input to the speaker 501, and when the power failure detection circuit 10 detects the power failure of the power amplifier voltage input by the power input terminal 40, the power failure detection signal is output to the control circuit 20; the audio playing device 50 outputs the audio signal processed by the audio output device 30; when the control circuit 20 detects that the power supply input terminal 40 is powered off, the volume of the audio signal received by the power amplifier circuit 500 of the audio playing device 50 is 0, that is, the audio playing device 50 does not generate POP noise.
It should be noted that the voltage input by the power input terminal 40 is greater than the operating voltage of the control circuit 20, the power input terminal 40 is electrically connected to the audio playing device 30 to supply power to the audio playing device, the voltage of the power input terminal is the power amplifier input voltage, for example, the power amplifier voltage input by the power input terminal 40 is 19V, and the operating voltage of the control circuit 20 is 3.3V; the volume of the audio signal is decreased progressively according to the preset magnitude until the target volume value is reached, and the target volume value specifically means that the audio signal is not output or the output audio signal is amplified by a power amplifier circuit of the audio playing device and then POP noise is not generated.
In this embodiment, referring to fig. 4, the power down detection circuit 10 includes a first voltage divider circuit 101, a switch circuit 102 and a second voltage divider circuit 103, wherein an input terminal of the first voltage divider circuit 101 is electrically connected to the power input terminal 40, an output terminal of the first voltage divider circuit 101 is electrically connected to an input terminal of the switch circuit 102, an output terminal of the switch circuit 102 is electrically connected to an input terminal of the second voltage divider circuit 103, and an input terminal of the second voltage divider circuit 103 is electrically connected to the control circuit 20.
Specifically, the first voltage divider circuit 101 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to the power input terminal 40, the other end of the first resistor R1 is interconnected with one end of the second resistor R2, and the other end of the second resistor R2 is grounded to GND; for dividing the voltage inputted to the first voltage dividing circuit 101, thereby generating a voltage difference in the voltage inputted to the switching circuit 102.
The switch circuit 102 includes a first diode D1, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a first transistor Q1;
one end of the first diode D1 is connected to the interconnection ends of the first resistor R1 and the second resistor R2, the other end of the first diode Q1 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is grounded GND, one end of the third resistor R3 is connected to one end of the first diode D1 and the first capacitor C1, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to one end of the first diode D1 and the second resistor R2;
the base of the first triode Q1 is connected to the end of the third resistor R3 and the fourth resistor R4, the emitter of the first triode Q1 is connected to the end of the third resistor R3 and the first capacitor C1, and the collector of the first triode Q1 is connected to the input of the second voltage divider 102.
The second voltage divider circuit 102 includes a fifth resistor R5 and a sixth resistor R6, wherein one end of the fifth resistor R5 is connected to the collector of the first transistor Q1, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is grounded to GND;
one end of the fifth resistor R5 interconnected with the sixth resistor R6 is connected to the control circuit 20.
It should be noted that the first transistor Q1 is an NPN transistor, the first resistor R1 and the second resistor R2 are voltage dividing resistors, and the first diode D1 is configured to generate a voltage difference between the base and the emitter of the first transistor Q1, and prevent the voltage from dropping and the first capacitor C1 from discharging to cause a current to flow back.
When the voltage input by the power input terminal 40 is a normal operating voltage, the emitter voltage of the first triode Q1 is equal to the voltage output after voltage division minus the voltage drop of the first diode D1, and the base voltage of the first triode Q1 is equal to the voltage output after voltage division, therefore, the base voltage of the first triode Q1 is higher than the emitter voltage of the first triode Q1, the first triode Q1 is cut off, because the fourth resistor R4 is grounded, the collector of the first triode Q1 outputs a low level signal to the control circuit 20, and the control circuit 20 receives a signal that power failure does not occur, and does not control the audio output device to process audio signals.
In this embodiment, when the power supply input from the power supply input terminal 40 is powered down, the voltage input from the power supply input terminal 40 is divided by the first resistor R1 and the second resistor R2, the first capacitor C1 discharges to make the emitter voltage of the first triode Q1 higher than the base voltage of the first triode Q1, the first triode Q1 is turned on, the collector of the first triode Q1 outputs a high level signal to the control circuit 20, the control circuit 20 receives the power down signal, and controls the audio output device 30 to decrement the input audio signal according to the preset audio signal volume until the target volume value is reached; in the embodiment, whether a power-down signal is generated or not is detected by adopting a simple analog circuit, and then the audio output device is controlled to process the signal, so that the target volume value input to the audio playing device cannot cause the audio playing device to generate POP noise due to power-down.
In this embodiment, further, the control circuit 20 receives the power-down signal, and controls the audio signal input by the audio output device 30 to decrease according to the preset audio signal volume until reaching the target volume value; referring to fig. 5 specifically, assuming that the power supply voltage of the control circuit 20 is 3.3V, the normal power supply voltage of the power amplifier voltage at the power input terminal 40 of the audio playing device 50 is 19V, because 19V is a heavy load relative to 3V, and the power-down time of the heavy load is earlier than that of a light load, when the power input terminal 40 is powered down, the power-down voltage of the 19V heavy load power amplifier is powered down from the normal working power supply voltage of the volume to the lowest power supply voltage of the power amplifier by about 5V, and because the power supply voltage of the control circuit 20 is a light load, the control circuit 20 is still in a working state during the time when the heavy load is reduced to the lowest power amplifier voltage, and the time is about; within 135ms, after receiving the power-down signal from the power-down detection circuit 10, the control circuit 20 controls the digital signal processor to decrease the volume of the input audio signal according to the preset audio signal until the target volume value is reached, i.e., the volume output gradually changes to 0, so that the audio signal input to the audio playing device is 0 or close to 0, and the POP noise generated by the audio playing device during unexpected power-down can be avoided.
In this embodiment, when the power of the power input terminal 40 is turned off, and the voltage value input from the power input terminal 40 is smaller than the voltage value of the normal power supply of the audio playing device, the power-down detection circuit 10 detects the change of the input voltage value, the input from the power input terminal 40 is converted into a level signal by the power-down detection circuit 10, when the voltage input from the power input terminal 40 is lower than the threshold voltage, the input voltage is a low level signal, the level signal is converted by the power-down detection circuit 10 to output a high level signal, the converted high level signal is input to the control circuit 20, the control circuit 20 controls the volume of the audio signal to decrease according to the preset volume according to the converted high level signal until reaching the target volume value, so that the volume target value of the output audio signal is obtained, and the audio signal input to the audio playing device 40 is amplified without generating POP noise, compared with the prior art, the invention adopts a simple analog circuit to know whether the power supply input end 40 is powered down so as to generate a power down signal, the control circuit 20 receives the power down signal and then processes the input audio signal, so that the processed audio signal is input into the audio playing device, POP noise generated by the audio playing device due to the power down of the power supply input end 40 can be avoided, and simultaneously, the research and development cost is greatly saved compared with a mode of adopting a software integrated module due to the adoption of the simple analog circuit.
In this embodiment, optionally, after the step of controlling the volume of the audio signal output by the audio output device 30 to decrease according to a preset magnitude when the power failure detection signal is received until the target volume value is reached is performed, the control circuit 20 is further configured to: after controlling the volume of the audio signal output by the audio output device 30 to decrease to the target volume value, a mute control signal is output to the audio playing device 50 to control the audio playing device 50 to mute.
It should be noted that, after the control circuit 20 controls the audio output device 30 to decrease the volume of the audio signal to the target volume value, the control circuit 20 further detects whether the volume of the audio signal of the audio output device decreases to the target volume value, and if the target volume value is reached, the control circuit controls the audio playing device 50 to mute, that is, the power supply of the audio playing device 50 is turned off, and the power supply of the audio playing device 50 is turned off, so as to save power. It is easy to understand that the power supply of the audio playing apparatus 50 may be the same power supply as the control circuit and may be different voltage values, or may be different power supplies.
In addition, the invention also provides audio playing equipment which comprises the audio playing control device.
It should be noted that, since the audio playing device implements the audio playing control apparatus of all the embodiments as described above, the same implementation and implementation effects as those of the above apparatus can be obtained, and the implementation is not described herein again.
In addition, the invention also provides an audio playing system, which comprises an audio playing device, an audio output device and the audio playing control device, wherein the audio output device outputs audio signals to the audio playing device for playing, the audio playing control device is electrically connected with the audio playing device, and the audio playing control device is connected with the audio output device in a wired or wireless mode.
It is easy to understand that the audio playing control device is electrically connected with the audio output device, so that the audio playing control device not only has the functions of audio playing and audio signal processing, but also can process the audio signal by electrically connecting one or more audio output devices and the audio playing device in addition, and play the processed audio signal through the audio playing device.
In this embodiment, referring to fig. 2, the audio playing system further includes a first radio module 60, where the first radio module 60 is electrically connected to the audio playing control device, and transmits an audio signal output by the audio playing control device to the audio output device through the first radio module 60; the audio output device further includes a second radio module, configured to receive the audio signal transmitted by the first radio module 60, and transmit the received audio signal to the audio playing device for playing; in this embodiment, the audio playback device further includes a first control circuit for detecting whether the audio signal received by the second radio module is a target volume value to control the audio playback device to mute, wherein the first control circuit is electrically connected to the second radio module and the audio playback device; the target audio signal volume value after the transmission processing through the mode of radio is closed by first control circuit control audio playback device, prevents on the one hand that audio playback device from producing the POP noise, and on the other hand when audio playback device and audio playback control device are not for same power supply, can play the effect of power saving through closing audio playback device.
It should be noted that, since the audio playing system implements the audio playing control device of all the embodiments as described above, the same implementation and implementation effects as those of the above device can be referred to, and details are not described here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An audio playing control method is applied to an audio playing system, the audio playing system comprises an audio playing device and an audio output device which outputs audio signals to the audio playing device for playing, the audio playing control method is characterized in that the audio playing device and the audio output device correspond to two different power supply sources and power supply voltages, and the audio playing control method comprises the following steps:
the power failure detection circuit detects whether the power supply input end of the audio playing device is powered down or not, and outputs a power failure detection signal when a power failure signal of the power supply input end is detected;
when the power failure detection signal is received, controlling the volume of the audio signal output by the audio output device to decrease according to a preset size until a target volume value is reached;
wherein, the power failure detection circuit detects whether the power input end of the audio playing device has power failure, and when detecting the power failure signal of the power input end, outputs the step of the power failure detection signal, including:
the power failure detection circuit discharges and is conducted when the power supply input end is in power failure, and outputs a power failure detection signal to the control circuit.
2. The audio playback control method of claim 1, wherein after performing the step of controlling the volume of the audio signal output by the audio output device to decrease by a preset amount until a target volume value is reached when the power-down detection signal is received, the audio playback control method further comprises:
and outputting a mute control signal to the audio playing device to control the audio playing device to mute.
3. An audio playing control device is applied to an audio playing system, and comprises an audio playing device and an audio output device for outputting audio signals to the audio playing device to play, and is characterized in that the audio playing control device further comprises:
the power failure detection circuit is used for detecting whether the power supply input end of the audio playing device is powered down or not and outputting a power failure detection signal when a power failure signal of the power supply input end is detected;
the control circuit is used for controlling the volume of the audio signal output by the audio output device to decrease progressively according to a preset size when the power failure detection signal is received until a target volume value is reached;
the power failure detection circuit comprises a switch circuit, the switch circuit is used for discharging and conducting when a power input end is in power failure, a power failure detection signal is output to the control circuit, and the audio playing device and the audio output device correspond to two different power supply sources and power supply voltages.
4. The audio playback control apparatus of claim 3, wherein after the step of controlling the audio output apparatus to decrease the volume of the audio signal output by the audio output apparatus according to a preset magnitude until the target volume value is reached when the power-down detection signal is received, the control circuit is further configured to: and after controlling the volume of the audio signal output by the audio output device to be reduced to a target volume value, outputting a mute control signal to the audio playing device so as to control the audio playing device to mute.
5. The audio playback control apparatus of claim 3, wherein the power down detection circuit comprises a first voltage divider circuit, a switch circuit, and a second voltage divider circuit, an input terminal of the first voltage divider circuit is electrically connected to the power input terminal, an output terminal of the first voltage divider circuit is electrically connected to an input terminal of the switch circuit, an output terminal of the switch circuit is electrically connected to an input terminal of the second voltage divider circuit, and an input terminal of the second voltage divider circuit is electrically connected to the control circuit.
6. The audio playback control apparatus of claim 5, wherein the first voltage divider circuit comprises a first resistor and a second resistor, one end of the first resistor is connected to the power input terminal, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is grounded.
7. The audio playback control apparatus of claim 6, wherein the switch circuit comprises a first diode, a third resistor, a fourth resistor, a first capacitor, and a first transistor;
one end of the first diode is connected with the interconnection end of the first resistor and the second resistor, the other end of the first diode is connected with one end of the first capacitor, the other end of the first capacitor is grounded, one end of the third resistor is connected with one end of the first diode, which is connected with the first capacitor, the other end of the third resistor is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with one end of the first diode, which is connected with the second resistor;
the base electrode of the first triode is connected with one end of the third resistor and the fourth resistor, the emitting electrode of the first triode is connected with one end of the third resistor and the first capacitor, and the collecting electrode of the first triode is connected with the input end of the second voltage division circuit.
8. The audio playback control apparatus of claim 7, wherein the second voltage divider circuit comprises a fifth resistor and a sixth resistor, one end of the fifth resistor is connected to the collector of the first transistor, the other end of the fifth resistor is interconnected with one end of the sixth resistor, and the other end of the sixth resistor is grounded;
one end of the fifth resistor and one end of the sixth resistor are connected with the control circuit.
9. An audio playback apparatus, characterized by comprising the audio playback control device according to any one of claims 3 to 8.
10. An audio playing system, comprising an audio playing device, an audio output device outputting audio signals to the audio playing device for playing, and the audio playing control device according to any one of claims 3 to 8, wherein the audio output device is electrically connected to the audio playing device, and the audio playing control device is connected to the audio output device by wire or wirelessly.
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| CN201810165969.2A CN108391203B (en) | 2018-02-27 | 2018-02-27 | Audio playing control method and device, audio playing equipment and system |
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| CN201810165969.2A CN108391203B (en) | 2018-02-27 | 2018-02-27 | Audio playing control method and device, audio playing equipment and system |
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| CN108391203A (en) | 2018-08-10 |
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Address after: 516006 community 37, Zhongkai high tech Zone, Huizhou, Guangdong Patentee after: Tongli Technology Co.,Ltd. Address before: 516006 Zhongkai high tech Zone 37, Huizhou, Guangdong Patentee before: TONLY ELECTRONICS HOLDINGS Ltd. |
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