CN114257702A - Audio and video processing circuit, control method, control device and electronic equipment - Google Patents
Audio and video processing circuit, control method, control device and electronic equipment Download PDFInfo
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- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 27
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/148—Video amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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Abstract
The invention provides an audio and video processing circuit, a control method, a control device and an electronic device, wherein the audio and video processing circuit has a first working mode and comprises the following components: an amplifying module; the load switch comprises a first output pin and a second output pin, the input end of the load switch is connected with the output end of the amplification module, and the second output pin is connected with the output end of the audio and video processing circuit; the input end of the band elimination filter is connected with the first output pin of the load switch, and the output end of the band elimination filter is connected with the output end of the audio and video processing circuit. The audio and video processing circuit can directionally filter signals in a target frequency range, so that more low-frequency signals are reserved, and the filtering effect is good; the circuit can be switched under multiple modes, and the flexibility and universality are high.
Description
Technical Field
The present invention relates to the field of signal processing technologies, and in particular, to an audio/video processing circuit, a control method, a control device, and an electronic device.
Background
Along with the abundance of entertainment and life of people, the requirement on the audio and video output effect of electronic equipment is higher and higher. Among the correlation technique, generally adopt trinity loudspeaker to export audio frequency and video, but when carrying out audio playback and voice call etc. and do not need the scene of vibration, need shake with the filtering motor through increasing the higher high pass filter of cutoff frequency, also can filtering most low frequency signal when the motor shakes the sense filtering to make the tone quality of output impaired, the sound low frequency is not enough, and the listening is felt relatively poor, influences user's use and experiences.
Disclosure of Invention
The invention provides an audio and video processing circuit, a control method, a control device and electronic equipment, which are used for overcoming the defect of poor filtering effect of audio and video signals in the prior art and realizing high-quality filtering.
The invention provides an audio and video processing circuit, which has a first working mode and comprises:
an amplifying module;
the load switch comprises a first output pin and a second output pin, the input end of the load switch is connected with the output end of the amplification module, and the second output pin is connected with the output end of the audio and video processing circuit;
the input end of the band elimination filter is connected with the first output pin of the load switch, and the output end of the band elimination filter is connected with the output end of the audio and video processing circuit;
in the first working mode, a first output pin of the load switch is in an on state, and a second output pin of the load switch is in an off state;
and under other working modes except the first working mode, the second output pin of the load switch is in an on state, and the first output pin is in an off state.
According to the audio/video processing circuit provided by the invention,
the amplification module includes: a first output terminal and a second output terminal;
the load switch includes: the first output end of the amplification module is connected with the input end of the first load switch; a second output end of the amplifying module is connected with an input end of the second load switch, the input end of the second load switch is connected with the input end of the amplifying module through a first resistor, and a second output pin of the first load switch and a second output pin of the second load switch are respectively connected with an output end of the audio and video processing circuit;
the band-stop filter includes: the input end of the first band-stop filter is connected with a first output pin of the first load switch, and the input end of the second band-stop filter is connected with a first output pin of the second load switch; the output end of the first band-stop filter and the output end of the second band-stop filter are respectively connected with the output end of the audio and video processing circuit.
According to the audio/video processing circuit provided by the invention,
the audio and video processing circuit also has a second operating mode, the circuit further comprising:
the processing module comprises a high-pass filter, the input end of the processing module is used for accessing original audio and video information, and the output end of the processing module is connected with the input end of the amplifying module, wherein the processing module comprises a high-pass filter;
in the second working mode, the high-pass filter is in an open state;
in other modes of operation than the second mode of operation, the high pass filter is in an off state.
The audio and video processing circuit provided by the invention further comprises: and the input end of the earphone module is respectively connected with the output end of the band elimination filter and the second output pin of the load switch.
The invention also provides a control method based on the audio and video processing circuit, which comprises the following steps:
receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode;
generating a first control instruction based on the target signal;
the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode;
and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
According to the control method provided by the present invention, the operation modes further include a second operation mode, and after the receiving of the operation mode signal, the method further includes:
generating a second control instruction based on the target signal;
the second control instruction is used for controlling to start a high-pass filter under the condition that the working mode is the second working mode;
and controlling to close the high-pass filter under the condition that the working mode is other than the second working mode.
The invention also provides a control device based on the audio and video processing circuit, which comprises:
the receiving module is used for receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode;
the processing module is used for generating a first control instruction based on the target signal;
the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode;
and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of any one of the control methods.
The invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the control method according to any one of the above.
According to the audio and video processing circuit, the control method, the control device and the electronic equipment, the band elimination filter is arranged, so that signals in a target frequency range can be filtered in a directional mode, more low-frequency signals are reserved, the flexibility is high, and the filtering effect is good; through setting up load switch, utilize the different intercommunication mode of the switching control circuit of load switch output pin to realize the switching of circuit under multiple mode, have higher flexibility and universality.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is one of the circuit schematic diagrams of the audio and video processing circuit provided by the present invention;
fig. 2 is a second schematic circuit diagram of the audio/video processing circuit provided in the present invention;
fig. 3 is a third schematic circuit diagram of the audio/video processing circuit provided by the present invention;
fig. 4 is one of the circuit schematic diagrams of the audio and video processing circuit provided by the present invention;
fig. 5 is a second schematic circuit diagram of the audio/video processing circuit provided in the present invention;
FIG. 6 is a schematic flow chart of a control method provided by the present invention;
FIG. 7 is a schematic structural diagram of a control device provided by the present invention;
fig. 8 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
The audio-video processing circuit of the present invention is described below in conjunction with fig. 1-5.
It should be noted that the audio/video processing circuit can be applied to mobile electronic devices and non-mobile electronic devices with an audio playing function, such as mobile phones, tablet computers, watches, learning machines, smart speakers, desktop computers, and the like.
It can be understood that, when the electronic device plays audio and video, the switching of multiple modes can be realized, so as to realize audio and video playing under multiple situations. If the mobile phone enters an Audio and video playing (Audio) mode under the condition of playing movie television or music, enters a Voice call (Voice) mode under the condition of calling, and enters a Vibration (Vibration) mode under the condition of alarm clock ringing or incoming call ringing.
As shown in fig. 1, the audio-video processing circuit includes: the device comprises an amplifying module, a load switch and a band elimination filter.
In this embodiment, the amplifying module is configured to amplify the audio/video signal.
In practical implementation, the amplifying module may be an audio power amplifier.
For example, as shown in fig. 2, an SD pin 01 of the AUDIO power amplifier receives an AUDIO _ PA _ SDN signal, and the AUDIO power amplifier is controlled to be opened and closed by the AUDIO _ PA _ SDN signal; and the SD pin 01 is also grounded through a resistor R1.
A VDD pin 08 of the audio amplifier is connected with a VBAT _ SPK signal, and power is supplied to the audio power amplifier through a VBAT _ SPK power line; and the VDD pin 08 is also grounded through a parallel module consisting of a capacitor C2 and a capacitor C3.
The AGEND1 pin 07 and AGEND pin 03 are each grounded.
The BYPASS pin 02 and the INP pin 04 are grounded through a capacitor C48, respectively.
The audio and video signals are input to the input end 05 of the amplifying module through a filter network connected with the input end 05 of the amplifying module in a single-ended input mode.
The filter network may be a series structure of a capacitor C1 and a resistor R3. The filtering effect with different effects can be achieved by adjusting the resistance values of the capacitor C1 and the resistor R3, for example, setting the capacitor C1 to 100nF and the resistor R3 to 24 Kohm.
The output 00 of the amplification module is connected to the input 10 of the load switch.
The load switch is used for controlling the on-off of the circuit.
The load switch comprises a first output pin 13 and a second output pin 14, the first output pin 13 is connected with an input end 16 of the band elimination filter, the second output pin 14 is connected with an output end of the audio and video processing circuit, and the first output pin 13 and the second output pin 14 of the load switch can be controlled to be opened and closed through a first control instruction.
In an actual implementation process, the load switch may be a loadswitch chip.
As shown in fig. 2, the ON pin 11 of the load switch receives the ENABLE signal, and the GND pin 15 is grounded.
The band elimination filter is used for filtering audio and video signals in a target frequency range, and the target frequency range is a frequency range which needs to be filtered by a user.
The input end 16 of the band elimination filter is connected with the first output pin 13 of the load switch, and the output end 17 of the band elimination filter is connected with the output end of the audio and video processing circuit and used for outputting audio and video signals subjected to band elimination filtering.
It can be understood that the value and the size of the frequency range of the band-stop filter can be adjusted by adjusting the specific values of the components in the band-stop filter.
It should be noted that, in this embodiment, the Audio/video processing circuit has multiple operating modes, where the first operating mode is an Audio mode.
In the first operation mode, the first output pin 13 of the load switch is in an on state, and the second output pin 14 is in an off state.
At the moment, the band elimination filter is communicated with the amplification module through the load switch, the audio and video signals are amplified by the amplification module and then input into the band elimination filter for filtering, and the filtered audio and video signals are output by an output port of the audio and video processing circuit.
It can be understood that the filtering range can be adjusted by adjusting the value of the band elimination filter, so that the audio and video signals in the target frequency range are eliminated.
The embodiments of the present application will be described with reference to a three-in-one horn as an example.
For a three-in-one horn, the magnetic circuit part is connected with the bracket through a spring plate, and the magnetic circuit part and the spring suspension system jointly form a resonance system, wherein the natural frequency is fv. Wherein fv is 171Hz generally, the three-in-one loudspeaker has vibration sensation in the frequency band interval of 100Hz to 300Hz, the frequency vibration sensation is strongest near 171Hz, and the vibration sensation is attenuated towards two sides by taking 171Hz as the center.
The inventor finds that, in the related art, in the Audio mode, the motor vibration is often filtered by adding a high-pass filter with a very high cut-off frequency, so that most of low-frequency useful signals are also filtered while the motor vibration is filtered, the tone quality is lost, and the hearing is affected.
In the application, for example, the right channel signal MP3_ OUTR with the sampling rate of 48KHz is input to the Audio/video processing circuit in the Audio mode, amplified at a single end by the amplifying module, and input to the band elimination filter for filtering through the load switch.
The value of the band elimination filter is adjusted to have a good filtering effect on signals near 171Hz, such as signals within 171Hz +/-30 Hz.
And then the filtered signal is input to an output port of the audio and video processing circuit. At the moment, the output signal only directionally filters audio-video signals near 171Hz, and signals of other frequency intervals are reserved.
Therefore, in the Audio mode, signals near a motor resonance point are filtered, and the influence on the use experience of a user due to the vibration of the motor is avoided; also remain more low frequency signal, when eliminating the vibration, also promoted tone quality, remain more sound details, brought better use for the user and experienced.
It will be appreciated that the audio/video processing circuit, in addition to the first mode of operation, may have other modes of operation, such as a Voice mode and a Vibration mode.
In other operation modes except the first operation mode, the second output pin 14 of the load switch is in the on state and the first output pin 13 is in the off state without retaining more low-frequency signals.
At the moment, the band elimination filter is disconnected, the amplification module is directly communicated with the output port of the audio and video processing circuit through the load switch, and the audio and video signals are amplified by the amplification module and then directly output through the output port of the audio and video processing circuit.
For example, in an actual execution process, when the mobile phone is in a Vibration mode, an original audio/video signal of a right channel is directly input to the audio/video processing circuit, and after single-end amplification is performed by the amplification module, the original audio/video signal is directly input to an output port of the audio/video processing circuit by the load switch to be output without passing through the band elimination filter, so that a signal near a motor resonance point is reserved, and a better Vibration effect is realized.
According to the audio and video processing circuit provided by the embodiment of the invention, the band elimination filter is arranged, so that signals in a target frequency range can be directionally filtered, more low-frequency signals are reserved, the flexibility is high, and the filtering effect is good; through setting up load switch, utilize the different intercommunication mode of the switching control circuit of load switch output pin to realize the switching of circuit under multiple mode, have higher flexibility and universality.
In some embodiments, the audio/video processing circuit may be further configured as a differential circuit to achieve a better anti-interference effect.
As shown in fig. 2, in this embodiment, the amplifying module includes a first output terminal 06 and a second output terminal 09, the load switch includes a first load switch U2 and a second load switch U3, and the band-stop filter includes a first band-stop filter and a second band-stop filter.
The first output end 06 and the second output end 09 of the amplifying module are the same and are used for outputting the same amplified signal. The other interfaces of the amplifying module are the same as those of the above embodiments.
As shown in fig. 2, the first output 06 of the amplifying module is connected to the input 10 of the first load switch U2; the second output terminal 09 of the amplifying module is connected to the input terminal 10 of the second load switch U3, and the input terminal 10 of the second load switch U3 is connected to the input terminal 05 of the amplifying module through the first resistor R2, so as to form a differential circuit.
An inductor L1 may be disposed between the first output terminal 06 and the input terminal 10 of the first load switch U2, and an inductor L2 may be disposed between the second output terminal 09 and the input terminal 10 of the second load switch U3.
It is understood that the amplified signals input to the first load switch U2 and the second load switch U3 are identical in amplitude and frequency, except that they are opposite in phase.
The first load switch U2 and the second load switch U3 are identical and each include a first output pin 13 and a second output pin 14 as described above.
Wherein the first output pin 13 of the first load switch U2 is connected with the input terminal 16 of the first band-stop filter, and the first output pin 13 of the second load switch U3 is connected with the input terminal 16 of the second band-stop filter.
As shown in fig. 3, the first band-stop filter and the second band-stop filter have the same structure and are respectively used for filtering signals in the same target frequency range.
The output end 17 of the first band-stop filter and the output end 17 of the second band-stop filter are respectively connected with the output end of the audio/video processing circuit.
Under the condition that the audio and video processing circuit is in a first working mode, a first output pin 13 of a first load switch U2 and a first output pin 13 of a second load switch U3 are turned on; and the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 are off.
The first band elimination filter is communicated with the first output end 06 of the amplifying module through a first load switch U2, and the second band elimination filter is communicated with the second output end 09 of the amplifying module through a second load switch U3.
In the actual implementation process, the original audio signal is amplified by an amplifier, and differential two paths of signals, namely a P pole signal and an N pole signal, are output.
The P-pole signal of the differential signal is input to the first band-stop filter through the first output pin 13 of the first load switch U2, and is filtered by the first band-stop filter, and the filtered signal is input to the output port of the audio/video processing circuit through the output terminal 17 of the first band-stop filter, that is, the one path P1N1 shown in fig. 3.
An N-pole signal of the differential signal is input to the second band-stop filter through the first output pin 13 of the second load switch U3, and is subjected to filtering processing by the second band-stop filter, and the filtered signal is input to an output port of the audio/video processing circuit through the output end 17 of the second band-stop filter, that is, one path of N1N1 shown in fig. 3.
The P pole signal and the N pole signal filtered by the band elimination filter are output to the three-in-one loudspeaker through an output port of the audio and video processing circuit.
The second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 are respectively connected to an output port of the audio/video processing circuit.
Under the condition that the audio and video processing circuit is in other working modes except the first working mode, the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 are turned on; and the first output pin 13 of the first load switch U2 and the second output pin 14 of the first load switch U2 are off.
At this time, the first output terminal 06 of the amplifying module is connected to the output port of the audio/video processing circuit through the first load switch U2, that is, the path P1N2 shown in fig. 3, and the second output terminal 09 of the amplifying module is connected to the output port of the audio/video processing circuit through the second load switch U3, that is, the path N1N2 shown in fig. 3.
In the actual implementation process, the P-pole signal of the differential signal output by the first output terminal 06 of the amplifier is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the first load switch U2; the N-pole signal of the differential signal output via the second output terminal 09 of the amplifier is directly input to the output port of the audio/video processing circuit via the second output pin 14 of the second load switch U3.
The P pole signal and the N pole signal are output to the three-in-one loudspeaker through an output port of the audio and video processing circuit.
According to the audio and video processing circuit provided by the embodiment of the invention, the anti-interference capability of the circuit can be effectively improved by arranging the differential circuit, and the filtering effect is further improved.
In some embodiments, the audio video processing circuit further has a second mode of operation, the circuit further comprising a processing module.
The second working mode is a Voice mode.
It can be understood that, in Voice mode, low-frequency noise and noise need to be filtered, and the emphasis is placed on the Voice part signal to realize clear Voice call.
In this embodiment, the processing module includes a high-pass filter, an input end of the processing module is used for accessing the original audio/video information, and an output end of the processing module is connected to the input end 05 of the amplifying module.
The high-pass filter is used for filtering low-frequency signals.
It should be noted that, in the second operation mode, the high-pass filter is in an on state.
That is, in the actual execution process, the original audio/video signal is filtered by the high-pass filter after being input to the processing module to filter the low-frequency signal, and the low-frequency signal is output by the processing module and input to the amplifying module for amplification.
The amplified signal is directly input to an output port of the audio/video processing circuit through a second output pin 14 of the load switch to be output, so that a low-frequency signal and a signal near the motor resonance can be effectively filtered, a complete high-frequency signal is reserved, and a clearer conversation effect is realized.
In other embodiments, the high-pass filtered signal may also be divided into two paths, and the two paths are respectively input to the first load switch U2 and the second load switch U3, wherein the P-pole signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the first load switch U2, and the N-pole signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the second load switch U3. The anti-interference effect can be better realized while the complete high-frequency signal is kept by filtering the low-frequency signal and the signal near the motor resonance.
In other modes of operation than the second mode of operation, the high pass filter is in an off state.
That is, in the actual implementation process, the original audio signal is not subjected to high-pass filtering, and is directly input to the amplification module through the processing module for amplification processing, so as to retain a complete low-frequency signal.
In some embodiments, in the first operating mode, the amplified signal is input to the band elimination filter through the load switch, signal filtering in the target frequency range is performed, and the filtered signal is output to the output port of the audio/video processing circuit.
Under the first working mode, not only more low-frequency signals are reserved, but also resonance signals are effectively filtered, the tone quality is improved, and more audio details are reserved, so that a better output effect is realized.
In other embodiments, differential circuitry may be employed as well. If an original audio signal is input to an amplification module for amplification processing, and the amplified signal is differentiated into two paths, wherein a P-pole signal is input to a first band-stop filter through a first output pin 13 of a first load switch U2 and is filtered by the first band-stop filter, and the filtered signal is input to an output port of an audio/video processing circuit through an output end 17 of the first band-stop filter.
The N-pole signal is input to the second band elimination filter through the first output pin 13 of the second load switch U3, and is filtered by the second band elimination filter, and the filtered signal is input to the output port of the audio/video processing circuit through the output end 17 of the second band elimination filter.
In some embodiments, in a third operating mode, such as the Vibration mode, the original audio signal is not high-pass filtered, and is directly input to the amplifying module via the processing module for amplifying. And the amplified signals are not subjected to band elimination filtering, but are directly input to an output port of the audio/video processing circuit through the load switch.
In the third mode, the vibration signal can be completely reserved, so that a better vibration effect is realized.
According to the audio and video processing circuit provided by the embodiment of the invention, circuit switching under various working modes can be realized, so that the optimal signal processing effect is realized under the target working mode, the flexibility is high, the switching is simple and convenient, and the use experience of a user is improved.
In some embodiments, taking the example of filtering out a 171Hz signal, the values of the components in the above circuit are respectively set as: the best filtering effect is achieved when C1 nF 100nF, C2 nF 2.2uF, C3 pF, R1R 2 k Ω 100k, R3 k Ω 24k, L1L 2 nH 0OHM, R41R 49 k Ω 31.6k Ω R44R 52R 45R 53 Ω 250 Ω R51R 43R 51 31.6k Ω R48R 40 k Ω R46 k Ω C54 k Ω 9.5k Ω C39C 32 nF 54nF, C32 nF 72.
Fig. 5 shows the voltage variation curve of the signal before and after input and output, and fig. 4 shows the filtering effect of the band-stop filter on the signal of each frequency at the value, wherein the gain of the signal is the lowest at 170.13Hz, which is 1.16 dB.
It should be noted that the above is only one preferred embodiment for filtering out signals around 171 Hz. By adjusting the values of the components of the circuit or the structure of the band-stop filter, directional filtering in other frequency ranges can be realized, which is not limited by the invention.
In some embodiments, the circuit further comprises: an earpiece module.
Wherein, the input end of the headphone module is respectively connected with the output end 17 of the band elimination filter and the second output pin 14 of the load switch.
As shown in fig. 3, in case the circuit is a differential circuit, the earpiece module comprises a first sub-input connected to the output 17 of the first band stop filter and the second output pin 14 of the first load switch U2, respectively, and a second sub-input connected to the output 17 of the second band stop filter and the second output pin 14 of the second load switch U3, respectively.
In the actual implementation process, 2 12 Ω resistors on the receiver path are used for constructing an equivalent 32 Ω load to simulate the receiver internal resistance; in order to avoid the influence of leakage current output from the SPK amplifier to a chip end receiver pin (NOUT/POUT) on the performance of a receiver circuit, 2 capacitors of 22uF can be added for carrying out direct current blocking, and a high-pass filter can be formed by the capacitors and a 12 omega resistor.
To avoid leakage current, a DC voltage is established by a bias resistor 1K Ω and a bias voltage 1.25V, eliminating the voltage difference.
According to the audio and video processing circuit provided by the embodiment of the invention, the earphone module is arranged, so that the switching between the earphone mode and the loudspeaker mode can be realized, the flexibility is high, and the use experience of a user is improved.
The following describes the control method based on the audio/video processing circuit, and the control method described below and the audio/video processing circuit described above may be referred to correspondingly.
The execution subject of the control method may be a processor, a control device, or a server communicatively connected to the control device.
As shown in fig. 6, the control method includes: step 610 and step 620.
the first control instruction is used for controlling the first output pin 13 of the load switch to be turned on and controlling the second output pin 14 to be turned off under the condition that the working mode is the first working mode;
and when the working mode is other than the first working mode, controlling the second output pin 14 of the load switch to be turned on and controlling the first output pin 13 to be turned off.
In this embodiment, the target signal is used to characterize the operating mode of the audiovisual processing circuit.
The working modes include an Audio/video playing (Audio) mode, a Voice call (Voice) mode, a Vibration (Vibration) mode and the like.
The first operating mode is the Audio mode.
The first control instruction is used for controlling the on-off of an output pin of the load switch, so that the circuit is switched under different modes.
When the target signal is in the first operation mode, a first control command for controlling the first output pin 13 of the load switch to be turned on and controlling the second output pin 14 to be turned off is generated.
In this mode, the band reject filter communicates with the amplification module through the load switch.
In some embodiments, in the case that the circuit is a differential circuit, in the case that the target signal is in the first operation mode, the first control instruction generated based on the target signal is used to control the first output pin 13 of the first load switch U2 and the first output pin 13 of the second load switch U3 to be turned on, and control the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 to be turned off.
And generating a control instruction for controlling the first output pin 13 of the load switch to be turned on and controlling the second output pin 14 to be turned off under the condition that the target signal is in the second working mode or the third working mode.
Similarly, in the case where the circuit is a differential circuit, when the target signal is in the second operation mode or the third operation mode, the first control command generated based on the target signal is used to control the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 to be turned on, and to control the first output pin 13 of the first load switch U2 and the first output pin 13 of the second load switch U3 to be turned off.
According to the control method provided by the embodiment of the invention, the first control instruction is generated through the target signal, and the first control instruction controls the opening and closing of the first output pin 13 and the second output pin 14 of the load switch in the audio and video amplifying circuit, so that the automatic switching of the circuits in different working modes is realized, the automation degree is high, and the flexibility and the universality are strong.
In some embodiments, the operating modes further include a second operating mode, and after step 620, the method further comprises:
generating a second control instruction based on the target signal;
the second control instruction is used for controlling the high-pass filter to be started under the condition that the working mode is the second working mode;
and controlling to close the high-pass filter under the condition that the working mode is other than the second working mode.
In this embodiment, the second control instruction is for controlling the opening and closing of the high-pass filter.
The second working mode is a Voice mode.
In the actual execution process, under the condition that the target signal is in the second working mode, a second control instruction for controlling the high-pass filter to be started is generated based on the target signal.
In the mode, the high-pass filter is communicated with the amplification module and is used for carrying out high-pass filtering on the original audio and video signals and inputting the filtered signals to the amplification module.
And generating a second control instruction for controlling the high-pass filter to be closed based on the target signal when the target signal is in the first working mode or the third working mode.
In the mode, the high-pass filter is disconnected with the amplification module, and the original audio and video signals are directly input to the amplification module without passing through the high-pass filter.
It should be noted that, under the condition that the second control instruction is matched with the first control instruction, the audio/video amplifying circuit can be switched between the three modes.
This embodiment will be described below by taking a differential circuit as an example.
For example, in the first operation mode, the first output pin 13 of the first load switch U2 and the first output pin 13 of the second load switch U3 are controlled to be turned on by the first control command, and the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 are controlled to be turned off by the first control command.
And controlling the high-pass filter to be closed through a second control instruction.
At the moment, the audio and video processing circuit is in a first working mode, the high-pass filter is disconnected with the amplifying module, and the band elimination filter is communicated with the amplifying module through the load switch.
Original audio and video signals are directly input to an amplification module (PA) through a filter network without high-pass filtering, and differential signals output by the PA are respectively input to a first load switch U2 and a second load switch U3. The P-pole signal is input to the first band-stop filter through the first output pin 13 of the first load switch U2, the N-pole signal is input to the second band-stop filter through the first output pin 13 of the second load switch U3, filtering is performed respectively, and the P-pole signal and the N-pole signal filtered by the band-stop filter are output to the three-in-one loudspeaker through the output port of the audio/video processing circuit.
Under the first working mode, not only more low-frequency signals are reserved, but also resonance signals are effectively filtered, the tone quality is improved, and more audio details are reserved, so that a better output effect is realized.
For another example, in the second operation mode, the first output pin 13 of the first load switch U2 and the first output pin 13 of the second load switch U3 are controlled to be turned off by the first control command, and the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 are controlled to be turned on.
And controlling the high-pass filter to be opened through a second control instruction.
At the moment, the audio and video processing circuit is in a second working mode, the high-pass filter is communicated with the amplifying module, and the band elimination filter is disconnected with the amplifying module.
The original audio and video signals are subjected to high-pass filtering, low-frequency signals are filtered, the filtered signals are input to an amplification module (PA) through a filter network, and differential signals output by the PA are respectively input to a first load switch U2 and a second load switch U3. The P-pole signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the first load switch U2, and the N-pole signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the second load switch U3 and is output to the three-in-one speaker through the output port of the audio/video processing circuit.
Under the second mode, can effectively filter low frequency signal and near the signal of motor resonance, remain complete high frequency signal, realize clearer conversation effect.
For example, in the third operation mode, the first output pin 13 of the first load switch U2 and the first output pin 13 of the second load switch U3 are controlled to be turned off by the first control command, and the second output pin 14 of the first load switch U2 and the second output pin 14 of the second load switch U3 are controlled to be turned on by the first control command.
And controlling the high-pass filter to be closed through a second control instruction.
At the moment, the audio and video processing circuit is in a third working mode, the high-pass filter is disconnected with the amplifying module, and the band elimination filter is disconnected with the amplifying module.
Original audio and video signals are directly input to an amplification module (PA) through a filter network without high-pass filtering, and differential signals output by the PA are respectively input to a first load switch U2 and a second load switch U3. The P-pole signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the first load switch U2, and the N-pole signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the second load switch U3 and is output to the three-in-one speaker through the output port of the audio/video processing circuit.
In the third working mode, the vibration signal can be completely reserved, so that a better vibration effect is realized.
According to the control method provided by the embodiment of the invention, through the mutual cooperation of the first control instruction and the second control instruction, the switching among more working modes can be realized, so that the optimal signal processing effect is realized in the target working mode, the flexibility is high, the switching is simple and convenient, and the improvement of the use experience of a user is facilitated
The following describes the control device based on the audio/video processing circuit, and the control device and the control method described above can be referred to correspondingly.
As shown in fig. 7, the apparatus includes: a receiving module 710 and a processing module 720.
The receiving module 710 is configured to receive a target signal, where the target signal is used to represent a working mode of the audio/video processing circuit, and the working mode includes a first working mode;
a processing module 720, configured to generate a first control instruction based on the target signal;
the first control instruction is used for controlling the first output pin 13 of the load switch to be turned on and controlling the second output pin 14 to be turned off under the condition that the working mode is the first working mode;
and when the working mode is other than the first working mode, controlling the second output pin 14 of the load switch to be turned on and controlling the first output pin 13 to be turned off.
According to the control device provided by the embodiment of the invention, the first control instruction is generated through the target signal, and the first control instruction controls the opening and closing of the first output pin 13 and the second output pin 14 of the load switch in the audio and video amplifying circuit, so that the automatic switching of the circuits in different working modes is realized, the automation degree is high, and the flexibility and the universality are strong.
In some embodiments, the operation modes further include a second operation mode, and the processing module 720 is further configured to: generating a second control instruction based on the target signal;
the second control instruction is used for controlling the high-pass filter to be started under the condition that the working mode is the second working mode;
and controlling to close the high-pass filter under the condition that the working mode is other than the second working mode.
Fig. 8 illustrates a physical structure diagram of an electronic device, and as shown in fig. 8, the electronic device may include: a processor (processor)810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. The processor 810 may call logic instructions in the memory 830 to perform an audio video processing circuit based control method, the method comprising: receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode; generating a first control instruction based on the target signal; the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode; and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. 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 and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, the computer being capable of executing the control method based on an audio/video processing circuit provided by the above methods, the method comprising: receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode; generating a first control instruction based on the target signal; the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode; and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to execute the control method based on the audio/video processing circuit provided in the foregoing, the method including: receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode; generating a first control instruction based on the target signal; the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode; and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An audio-video processing circuit having a first mode of operation, comprising:
an amplifying module;
the load switch comprises a first output pin and a second output pin, the input end of the load switch is connected with the output end of the amplification module, and the second output pin is connected with the output end of the audio and video processing circuit;
the input end of the band elimination filter is connected with the first output pin of the load switch, and the output end of the band elimination filter is connected with the output end of the audio and video processing circuit;
in the first working mode, a first output pin of the load switch is in an on state, and a second output pin of the load switch is in an off state;
and under other working modes except the first working mode, the second output pin of the load switch is in an on state, and the first output pin is in an off state.
2. The audio-video processing circuit of claim 1,
the amplification module includes: a first output terminal and a second output terminal;
the load switch includes: the first output end of the amplification module is connected with the input end of the first load switch; a second output end of the amplifying module is connected with an input end of the second load switch, the input end of the second load switch is connected with the input end of the amplifying module through a first resistor, and a second output pin of the first load switch and a second output pin of the second load switch are respectively connected with an output end of the audio and video processing circuit;
the band-stop filter includes: the input end of the first band-stop filter is connected with a first output pin of the first load switch, and the input end of the second band-stop filter is connected with a first output pin of the second load switch; the output end of the first band-stop filter and the output end of the second band-stop filter are respectively connected with the output end of the audio and video processing circuit.
3. The audio-video processing circuit as claimed in claim 1 or 2, further having a second mode of operation, the circuit further comprising:
the processing module comprises a high-pass filter, the input end of the processing module is used for accessing original audio and video information, and the output end of the processing module is connected with the input end of the amplifying module, wherein the processing module comprises a high-pass filter;
in the second working mode, the high-pass filter is in an open state;
in other modes of operation than the second mode of operation, the high pass filter is in an off state.
4. The audio-video processing circuit according to claim 1 or 2, further comprising:
and the input end of the earphone module is respectively connected with the output end of the band elimination filter and the second output pin of the load switch.
5. A control method based on the audio/video processing circuit of any one of claims 1 to 4, characterized by comprising:
receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode;
generating a first control instruction based on the target signal;
the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode;
and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
6. The control method of claim 5, wherein the operating mode further comprises a second operating mode, and after the receiving an operating mode signal, the method further comprises:
generating a second control instruction based on the target signal;
the second control instruction is used for controlling to start a high-pass filter under the condition that the working mode is the second working mode;
and controlling to close the high-pass filter under the condition that the working mode is other than the second working mode.
7. A control device based on the audio/video processing circuit of any one of claims 1-4, characterized by comprising:
the receiving module is used for receiving a target signal, wherein the target signal is used for representing the working mode of the audio and video processing circuit, and the working mode comprises a first working mode;
the processing module is used for generating a first control instruction based on the target signal;
the first control instruction is used for controlling a first output pin of the load switch to be turned on and controlling a second output pin of the load switch to be turned off under the condition that the working mode is the first working mode;
and under the condition that the working mode is other working modes except the first working mode, controlling a second output pin of the load switch to be turned on and controlling a first output pin to be turned off.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the control method according to any of claims 5 or 6 are implemented when the processor executes the program.
9. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the control method according to any one of claims 5 or 6.
10. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the control method according to any one of claims 5 or 6 when executed by a processor.
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