CN114257702B - 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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- CN114257702B CN114257702B CN202111302035.7A CN202111302035A CN114257702B CN 114257702 B CN114257702 B CN 114257702B CN 202111302035 A CN202111302035 A CN 202111302035A CN 114257702 B CN114257702 B CN 114257702B
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- 238000012545 processing Methods 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 41
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- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 21
- 238000004891 communication Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 7
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 4
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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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- Acoustics & Sound (AREA)
- Circuit For Audible Band Transducer (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
The invention provides an audio and video processing circuit, a control method, a control device and electronic equipment, 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 amplifying module, and the second output pin is connected with the output end of the audio/video processing circuit; and the input end of the band-stop filter is connected with the first output pin of the load switch, and the output end of the band-stop filter is connected with the output end of the audio/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 switching of the circuit in various modes can be realized, and the circuit has higher flexibility and universality.
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 richness of entertainment and life of people, the requirements on audio and video output effects of electronic equipment are also higher and higher. In the related art, three-in-one loudspeaker is generally adopted to output audio and video, but when the scene such as audio playing and voice communication which do not need vibration is carried out, a high-pass filter with higher cut-off frequency is needed to filter motor vibration sense, and most of low-frequency signals can be filtered when the motor vibration sense is filtered, so that the output tone quality is damaged, the low-frequency sound is insufficient, the hearing sense is poor, and the use experience of a user is influenced.
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 solving the defect of poor audio and video signal filtering effect 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 amplifying module, and the second output pin is connected with the output end of the audio/video processing circuit;
The input end of the band-stop filter is connected with the first output pin of the load switch, and the output end of the band-stop filter is connected with the output end of the audio/video processing circuit, wherein the output end of the band-stop filter is connected with the output end of the audio/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;
in 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 an audio-video processing circuit provided by the invention,
the amplifying module includes: a first output terminal and a second output terminal;
the load switch includes: the first output end of the amplifying module is connected with the input end of the first load switch; the second output end of the amplifying module is connected with the 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 the second output pin of the first load switch and the second output pin of the second load switch are respectively connected with the output end of the audio/video processing circuit;
The band reject filter includes: the input end of the first band-stop filter is connected with the first output pin of the first load switch, and the input end of the second band-stop filter is connected with the 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/video processing circuit.
According to an audio-video processing circuit provided by the invention,
the audio and video processing circuit further has 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 input end of the amplifying module is connected with the input end of the amplifying module;
in the second working mode, the high-pass filter is in an on state;
in other operation modes than the second operation mode, the high-pass filter is in an off state.
According to the audio and video processing circuit provided by the invention, the audio and video processing circuit further comprises: and the input end of the receiver 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/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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode;
and under the condition that the working mode is other than the first working mode, controlling the second output pin of the load switch to be opened and controlling the first output pin to be closed.
According to the control method provided by the invention, the working mode further comprises a second working mode, and after the working mode signal is received, the method further comprises:
generating a second control instruction based on the target signal;
the second control instruction is used for controlling to start the high-pass filter under the condition that the working mode is a second working mode;
and controlling to turn off 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/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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode;
and under the condition that the working mode is other than the first working mode, controlling the second output pin of the load switch to be opened and controlling the first output pin to be closed.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any one of the control methods described above when executing the computer program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method as described in any of the above.
According to the audio and video processing circuit, the control method, the control device and the electronic equipment, provided by the invention, the signals in the target frequency range can be directionally filtered by arranging the band-stop filter, so that more low-frequency signals are reserved, the flexibility is high, and the filtering effect is good; by arranging the load switch, the switching of the circuit in various modes is realized by utilizing different communication modes of the switching control circuit of the output pin of the load switch, and the circuit has higher flexibility and universality.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an audio/video processing circuit according to the present invention;
FIG. 2 is a second schematic diagram of an audio/video processing circuit according to the present invention;
FIG. 3 is a third schematic circuit diagram of the audio/video processing circuit according to the present invention;
FIG. 4 is one of the circuit schematic diagrams of the audio and video processing circuit provided by the invention;
FIG. 5 is a second schematic circuit diagram of the audio/video processing circuit according to the present invention;
FIG. 6 is a flow chart of a control method provided by the present invention;
FIG. 7 is a schematic diagram of a control device according to the present invention;
fig. 8 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The audio-video processing circuit of the present invention is described below with reference to 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 audio playing function, such as mobile phones, tablet computers, watches, learning machines, intelligent sound boxes, desktop computers, and the like.
It can be understood that when the electronic device performs audio and video playing, the electronic device can realize switching of multiple modes so as to realize audio and video playing under multiple situations. Such as an Audio-video play (Audio) mode in the case of playing a movie tv or music, a Voice call (Voice) mode in the case of a call, and a Vibration (Vibration) mode in the case of an alarm bell or an incoming call.
As shown in fig. 1, the audio/video processing circuit includes: an amplifying module, a load switch and a band reject filter.
In this embodiment, the amplifying module is configured to amplify the audio/video signal.
In an actual implementation, the amplification module may be an audio power amplifier.
For example, as shown in fig. 2, the SD pin 01 of the AUDIO power amplifier is connected to an audio_pa_sdn signal, and the AUDIO power amplifier is controlled to be turned on or turned off by the audio_pa_sdn signal; and the SD pin 01 is also grounded through a resistor R1.
The VDD pin 08 is connected to the VBAT-SPK signal, and supplies power to the audio power amplifier through the 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.
AGEND1 pin 07 and AGEND pin 03 are grounded, respectively.
BYPASS pin 02 and INP pin 04 are grounded via capacitor C48, respectively.
The audio and video signals are input to the input end 05 of the amplifying module through a filtering 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 resistance values of the capacitor C1 and the resistor R3 are adjusted to achieve filtering effects with different effects, for example, the capacitor C1 is set to be 100nF, and the resistor R3 is set to be 24Kohm.
The output 00 of the amplifying 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, wherein the first output pin 13 is connected with an input end 16 of the band-stop filter, the second output pin 14 is connected with an output end of the audio-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 the actual implementation, the load switch may be a loadswitch chip.
As shown in fig. 2, the ON pin 11 of the load switch is connected to the ENABLE signal and the GND pin 15 is grounded.
The band-stop filter is used for filtering audio and video signals in a target frequency range, wherein the target frequency range is a frequency range required to be filtered by a user.
The input end 16 of the band-stop filter is connected with the first output pin 13 of the load switch, and the output end 17 of the band-stop filter is connected with the output end of the audio/video processing circuit and is used for outputting audio/video signals after band-stop filtering.
It will be appreciated that by adjusting the specific values of the components in the band reject filter, the values and magnitudes of the filtered frequency ranges may be adjusted.
It should be noted that, in this embodiment, the Audio/video processing circuit has a plurality of operation modes, wherein the first operation 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 this time, the band-stop filter is communicated with the amplifying module through the load switch, the audio and video signals are amplified by the amplifying module and then input into the band-stop filter for filtering, and the filtered audio and video signals are output through the 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-stop filter, so as to eliminate the audio/video signals in the target frequency range.
The embodiments of the present application will be described using a three-in-one horn as an example.
For a three-in-one loudspeaker, 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. The fv is generally 171Hz, the three-in-one loudspeaker has vibration sense in the frequency range from 100Hz to 300Hz, the vibration sense is strongest near 171Hz, and the vibration sense is attenuated towards two sides by taking 171Hz as the center.
In the research and development process, the inventor finds that in the related technology, in the Audio mode, the motor vibration sense is often filtered by adding a high-pass filter with high cut-off frequency, so that most of low-frequency useful signals are filtered while the motor vibration sense is filtered, thereby losing sound quality and affecting the hearing sense.
In this application, taking the right channel signal MP 3_outl with the sampling rate of 48KHz as an example, in the Audio mode, the Audio and video signal is input to the Audio and video processing circuit, amplified by the amplifying module in a single-ended manner, and input to the band-stop filter for filtering by the load switch.
The values of the band-stop filter are adjusted to have a good filtering effect on signals in the vicinity of 171Hz, such as signals in 171Hz plus or minus 30 Hz.
And then inputting the filtered signals to an output port of the audio/video processing circuit. At this time, the output signal directionally filters only the audio/video signal around 171Hz, while retaining the signals of other frequency bins.
Therefore, in the Audio mode, signals near the resonance point of the motor are filtered, and the influence of vibration of the motor on the use experience of a user is avoided; more low-frequency signals are reserved, the sound quality is improved while the shock sensation is eliminated, more sound details are reserved, and better use experience is brought to users.
It will be appreciated that the audio video processing circuit has other modes of operation in addition to the first mode of operation, such as Voice mode and Vibration mode.
In other operation modes than the first operation mode, the second output pin 14 of the load switch is in an on state, and the first output pin 13 is in an off state without reserving more low frequency signals.
At this time, the band-stop filter is disconnected, the amplifying module is directly communicated with the output port of the audio/video processing circuit through the load switch, and the audio/video signal is amplified by the amplifying module and then is directly output through the output port of the audio/video processing circuit.
For example, in the actual implementation process, when the mobile phone is in the Vibration mode, the original audio and video signal of the right channel is directly input to the audio and video processing circuit, and after being amplified by the amplifying module in a single-ended mode, the signal is directly input to the output port of the audio and video processing circuit by the load switch for output without passing through the band elimination filter, so that the signal near the resonance point of the motor 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-stop 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; by arranging the load switch, the switching of the circuit in various modes is realized by utilizing different communication modes of the switching control circuit of the output pin of the load switch, and the circuit has higher flexibility and universality.
In some embodiments, the audio/video processing circuit may also be configured as a differential circuit, so as to achieve a better anti-interference effect.
As shown in fig. 2, in this embodiment, the amplifying module includes a first output 06 and a second output 09, the load switches include a first load switch U2 and a second load switch U3, and the band reject filter includes a first band reject filter and a second band reject filter.
The first output 06 and the second output 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 09 of the amplifying module is connected to the input 10 of the second load switch U3, and the input 10 of the second load switch U3 is connected to the input 05 of the amplifying module through the first resistor R2, together forming a differential circuit.
An inductance L1 may be disposed between the first output terminal 06 and the input terminal 10 of the first load switch U2, and an inductance L2 may be disposed between the second output terminal 09 and the input terminal 10 of the second load switch U3.
It will be appreciated that the amplified signals input to the first load switch U2 and the second load switch U3 are identical in amplitude and frequency, except for the opposite phases.
The first load switch U2 and the second load switch U3 are identical and each comprise a first output pin 13 and a second output pin 14 as described above.
The first output pin 13 of the first load switch U2 is connected to the input 16 of the first band-stop filter, and the first output pin 13 of the second load switch U3 is connected to the input 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 opened; 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 turned off.
The first band-stop filter is communicated with the first output end 06 of the amplifying module through a first load switch U2, and the second band-stop filter is communicated with the second output end 09 of the amplifying module through a second load switch U3 respectively.
In the actual implementation process, the original audio signal is amplified by an amplifier, and two differential signals are output, namely a P-pole signal and an N-pole signal.
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 end 17 of the first band-stop filter, i.e. one path of P1N1 shown in fig. 3.
The 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 filtered by the second band-stop 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-stop filter, namely, the N1 path shown in fig. 3.
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.
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 with an output port of the audio/video processing circuit.
In the case that the audio/video processing circuit is in other operation modes than the first operation 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 closed.
At this time, the first output end 06 of the amplifying module is connected to the output port of the audio/video processing circuit through the first load switch U2, i.e. the path P1N2 shown in fig. 3, and the second output end 09 of the amplifying module is connected to the output port of the audio/video processing circuit through the second load switch U3, i.e. the path N1N2 shown in fig. 3.
In the actual execution process, the P-pole signal of the differential signal output by the first output end 06 of the amplifier is directly input to the output port of the audio/video processing circuit by the second output pin 14 of the first load switch U2; the N-pole signal of the differential signal output via the second output end 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-electrode signal and the N-electrode signal are output to the trinity loudspeaker through the output port of the audio/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 appreciated that in Voice mode, it is necessary to filter out low frequency background noise and noise, and focus 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 with the input end 05 of the amplifying module.
The high-pass filter is used for filtering low-frequency signals.
In the second operation mode, the high-pass filter is in an on state.
That is, in the actual execution process, the original audio and video signals are input to the processing module, filtered by the high-pass filter to filter the low-frequency signals, output by the processing module, and input to the amplifying module for amplification.
The amplified signal is directly input to the output port of the audio/video processing circuit through the second output pin 14 of the load switch for output, so that the low-frequency signal and the signal near the motor resonance can be effectively filtered, the complete high-frequency signal is reserved, and a clearer conversation effect is realized.
In other embodiments, the high-pass filtered signal may be input to the first load switch U2 and the second load switch U3 separately, where 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 low-frequency signals and signals near the motor resonance are filtered, and the complete high-frequency signals are reserved, and meanwhile, the better anti-interference effect can be achieved.
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 directly input to the amplifying module for amplifying processing through the processing module without high-pass filtering, so as to preserve the complete low-frequency signal.
In some embodiments, in the first working mode, the amplified signal is input to the band-stop 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.
In the first working mode, more low-frequency signals are reserved, resonance signals are also effectively filtered, sound quality is improved, more audio details are reserved, and therefore a better output effect is achieved.
In other embodiments, differential circuitry may be employed as well. If the original audio signal is input to the amplifying module for amplifying, and the amplified signal is subjected to differential two paths, 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 first band-stop filter performs filtering, and the filtered signal is input to the output port of the audio/video processing circuit through the output end 17 of the first band-stop filter.
The N-pole signal is input to the second band-stop filter through the first output pin 13 of the second load switch U3, and is filtered by the second band-stop 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-stop filter.
In some embodiments, in the third operation mode, such as the Vibration mode, the original audio signal is directly input to the amplifying module for amplifying without high-pass filtering. The amplified signal is not subjected to band-stop filtering, but is directly input to an output port of the audio/video processing circuit through a load switch.
In the third mode, the vibration signal can be completely preserved, thereby achieving a better vibration effect.
According to the audio and video processing circuit provided by the embodiment of the invention, circuit switching in multiple 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 use experience of a user is improved.
In some embodiments, taking filtering out the 171Hz signal as an example, the values of the components in the above circuit are respectively set as follows: c1 =100nf, c2=2.2uf, c3=22 pF, r1=r2=100 kΩ, r3=24 kΩ, l1=l2=47 nh_0ohm, r41=r49=31.6kΩ, r44=r52=r45=r53=250Ω, r43=r51=31.6kΩ, r48=r40=r46=10kΩ, r54=9.5kΩ, c39=c32=54 nF, c40=c41=c33=c34=27 nF.
The voltage change curves of the signals before and after input and output are shown in fig. 5, and the filtering effect of the band-stop filter on the signals of each frequency at the value shown in fig. 4, wherein the gain of the signals is the lowest at 170.13Hz and is 1.16dB.
It should be noted that the above is only one preferred embodiment for filtering out signals around 171 Hz. The directional filtering in other frequency ranges can be realized by adjusting the numerical value of each component of the circuit or the structure of the band-stop filter, and the invention is not limited to the directional filtering.
In some embodiments, the circuit further comprises: and a receiver module.
The input end of the receiver module is respectively connected with the output end 17 of the band-stop filter and the second output pin 14 of the load switch.
As shown in fig. 3, in the case that the circuit is a differential circuit, the earpiece module includes a first sub-input terminal and a second sub-input terminal, wherein the first sub-input terminal is respectively connected to the output terminal 17 of the first band-stop filter and the second output pin 14 of the first load switch U2, and the second sub-input terminal is respectively connected to the output terminal 17 of the second band-stop filter and the second output pin 14 of the second load switch U3.
In the actual implementation process, 2 12 omega resistors on the earphone path are used for constructing an equivalent 32 omega load to simulate the internal resistance of the earphone; in order to avoid the leakage current output from the SPK amplifier to the chip-side earpiece pin (NOUT/POUT) from affecting earpiece circuit performance, 2 22uF capacitors can be added for DC blocking, and a high-pass filter is formed with a 12 omega resistor.
To avoid leakage current, a DC voltage is established through a bias resistor 1KΩ and a bias voltage of 1.25V, eliminating the voltage difference.
According to the audio and video processing circuit provided by the embodiment of the invention, through arranging the earphone module, 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 control method based on the audio/video processing circuit provided by the invention is described below, and the control method described below and the audio/video processing circuit described above can 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.
Step 610, receiving a target signal, where the target signal is used to characterize an operation mode of the audio/video processing circuit, and the operation mode includes a first operation mode;
step 620, generating 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 opened and controlling the second output pin 14 to be closed when the working mode is the first working mode;
In the case that the operation mode is other than the first operation mode, the second output pin 14 of the load switch is controlled to be turned on, and the first output pin 13 is controlled to be turned off.
In this embodiment, the target signal is used to characterize the mode of operation of the audio-video processing circuit.
The working modes comprise an Audio/video playing (Audio) mode, a Voice call (Voice) mode, a Vibration (Vibration) mode and the like.
The first working mode is an Audio mode.
The first control instruction is used for controlling the opening and closing of the output pins of the load switch, so that the switching of the circuit in different modes is realized.
When the target signal is in the first working mode, a first control instruction is generated to control the first output pin 13 of the load switch to be turned on and the second output pin 14 to be turned off.
In this mode, the band reject filter communicates with the amplification module through a load switch.
In some embodiments, in a case where the circuit is a differential circuit, in a case where 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 when the target signal is in the second working mode or the third working mode, generating a control instruction for controlling the first output pin 13 of the load switch to be opened and controlling the second output pin 14 to be closed.
Also, in the case where the circuit is a differential circuit, the first control instruction 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 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 when the target signal is the second operation mode or the third operation mode.
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 output pin 13 and the second output pin 14 of the load switch in the audio-video amplifying circuit are controlled to be opened and closed by the first control instruction, so that the automatic switching of the circuits in different working modes is realized, the degree of automation is high, and the flexibility and the universality are strong.
In some embodiments, the operating mode further comprises a second operating mode, after step 620, the method further comprising:
generating a second control instruction based on the target signal;
The second control instruction is used for controlling to start the high-pass filter under the condition that the working mode is a second working mode;
in the case where the operation mode is other than the second operation mode, the control turns off the high-pass filter.
In this embodiment, the second control instruction is used to control the switching of the high-pass filter.
The second mode of operation is the 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 amplifying module and is used for carrying out high-pass filtering on the original audio and video signals and inputting the filtered signals to the amplifying 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 this mode, the high pass filter is disconnected from the amplification module, and the original audio/video signal is 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 switching of the audio/video amplifying circuit in three modes can be realized.
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 instruction, 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.
And controlling the high-pass filter to be closed through a second control instruction.
At this time, the audio/video processing circuit is in the first working mode, the high-pass filter is disconnected from the amplifying module, and the band-stop filter is communicated with the amplifying module through the load switch.
The original audio and video signals are directly input to an amplifying module (PA) through a filter network without high-pass filtering, and signals of two paths of difference 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 a first output pin 13 of the first load switch U2, the N-pole signal is input to the second band-stop filter through a first output pin 13 of the second load switch U3, filtering is performed respectively, and the P-pole signal and the N-pole signal after filtering through the band-stop filter are output to the three-in-one loudspeaker through an output port of the audio/video processing circuit.
In the first working mode, more low-frequency signals are reserved, resonance signals are also effectively filtered, sound quality is improved, more audio details are reserved, and therefore a better output effect is achieved.
For another example, in the second working 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 closed by the first control instruction, 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 opened.
And controlling the high-pass filter to be started through a second control instruction.
At this time, the audio/video processing circuit is in the second working mode, the high-pass filter is communicated with the amplifying module, and the band-stop 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 amplifying module (PA) through a filtering network, and signals of two paths of 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 loudspeaker through the output port of the audio/video processing circuit.
In the second working mode, the low-frequency signals and signals near the resonance of the motor can be effectively filtered, the complete high-frequency signals are reserved, and a clearer conversation effect is achieved.
Also, for example, in the third working 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 closed by the first control instruction, 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 opened.
And controlling the high-pass filter to be closed through a second control instruction.
At this time, the audio/video processing circuit is in the third working mode, the high-pass filter is disconnected from the amplifying module, and the band-stop filter is disconnected from the amplifying module.
The original audio and video signals are directly input to an amplifying module (PA) through a filter network without high-pass filtering, and signals of two paths of difference 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 loudspeaker 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, more working modes can be switched through the mutual matching of the first control instruction and the second control instruction, 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 use experience of a user is improved
The control device based on the audio/video processing circuit provided by the invention is described below, and the control device described below 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 characterize an operation mode of the audio/video processing circuit, and the operation mode includes a first operation 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 opened and controlling the second output pin 14 to be closed when the working mode is the first working mode;
In the case that the operation mode is other than the first operation mode, the second output pin 14 of the load switch is controlled to be turned on, and the first output pin 13 is controlled 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 output pin 13 and the second output pin 14 of the load switch in the audio-video amplifying circuit are controlled to be opened and closed by the first control instruction, so that the automatic switching of the circuits in different working modes is realized, the degree of automation is high, and the flexibility and the universality are strong.
In some embodiments, the operating modes further include a second operating 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 to start the high-pass filter under the condition that the working mode is a second working mode;
in the case where the operation mode is other than the second operation mode, the control turns off the high-pass filter.
Fig. 8 illustrates a physical structure diagram of an electronic device, as shown in fig. 8, which may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a control method based on an audio video processing circuit, 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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode; and under the condition that the working mode is other than the first working mode, controlling the second output pin of the load switch to be opened and controlling the first output pin to be closed.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform 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, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method of controlling 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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode; and under the condition that the working mode is other than the first working mode, controlling the second output pin of the load switch to be opened and controlling the first output pin to be closed.
In yet another aspect, the present invention further provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the above-provided audio-video processing circuit-based control 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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode; and under the condition that the working mode is other than the first working mode, controlling the second output pin of the load switch to be opened and controlling the first output pin to be closed.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
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 amplifying module, and the second output pin is connected with the output end of the audio/video processing circuit;
the input end of the band-stop filter is connected with the first output pin of the load switch, and the output end of the band-stop filter is connected with the output end of the audio/video processing circuit, wherein the output end of the band-stop filter is connected with the output end of the audio/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;
in 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;
the audio and video processing circuit further has 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 input end of the amplifying module is connected with the input end of the amplifying module;
In the second working mode, the high-pass filter is in an on state;
in other operation modes than the second operation mode, the high-pass filter is in an off state.
2. The audio video processing circuit of claim 1, wherein,
the amplifying module includes: a first output terminal and a second output terminal;
the load switch includes: the first output end of the amplifying module is connected with the input end of the first load switch; the second output end of the amplifying module is connected with the 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 the second output pin of the first load switch and the second output pin of the second load switch are respectively connected with the output end of the audio/video processing circuit;
the band reject filter includes: the input end of the first band-stop filter is connected with the first output pin of the first load switch, and the input end of the second band-stop filter is connected with the 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/video processing circuit.
3. The audio-video processing circuit according to claim 1 or 2, characterized by further comprising:
and the input end of the receiver module is respectively connected with the output end of the band elimination filter and the second output pin of the load switch.
4. A control method based on the audio-video processing circuit according to any one of claims 1 to 3, 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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode;
when the working mode is other than the first working mode, controlling a second output pin of the load switch to be opened and controlling the first output pin to be closed;
the operating modes further include a second operating mode, and after the receiving the second operating 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 the high-pass filter under the condition that the working mode is a second working mode;
and controlling to turn off the high-pass filter under the condition that the working mode is other than the second working mode.
5. A control device based on an audio-video processing circuit according to any one of claims 1-3, 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/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 the first output pin of the load switch to be opened and controlling the second output pin to be closed when the working mode is a first working mode;
when the working mode is other than the first working mode, controlling a second output pin of the load switch to be opened and controlling the first output pin to be closed;
The working modes further comprise a second working mode;
the processing module is further used for generating a second control instruction based on the target signal;
the second control instruction is used for controlling to start the high-pass filter under the condition that the working mode is a second working mode;
and controlling to turn off the high-pass filter under the condition that the working mode is other than the second working mode.
6. 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 processor implements the steps of the control method according to claim 4 when the program is executed by the processor.
7. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the control method according to claim 4.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07212675A (en) * | 1994-01-24 | 1995-08-11 | Rohm Co Ltd | Television video signal processing circuit |
| CN101106368A (en) * | 2006-07-12 | 2008-01-16 | 华硕电脑股份有限公司 | Sound explosion proof circuit |
| JP2009152948A (en) * | 2007-12-21 | 2009-07-09 | Seiko Epson Corp | Image processing circuit, regulating method therefor, and electronic apparatus |
| CN101662712A (en) * | 2008-08-28 | 2010-03-03 | 深圳富泰宏精密工业有限公司 | Microphone circuit |
| CN102624348A (en) * | 2011-01-28 | 2012-08-01 | 瑞萨电子株式会社 | Semiconductor integrated circuit and operation method of the same |
| CN102858146A (en) * | 2011-06-28 | 2013-01-02 | 湖南纽曼数码科技有限公司 | Vehicular equipment |
| CN202872884U (en) * | 2012-09-28 | 2013-04-10 | 青岛海信移动通信技术股份有限公司 | Audio output circuit and mobile terminal |
| CN105208494A (en) * | 2015-09-30 | 2015-12-30 | 惠州Tcl移动通信有限公司 | Three-in-one audio device |
| CN210351117U (en) * | 2019-07-22 | 2020-04-17 | 重庆惠科金扬科技有限公司 | Multifunctional signal switching circuit and display device |
| CN113097669A (en) * | 2021-04-16 | 2021-07-09 | 北京无线电测量研究所 | Tunable filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012055968A1 (en) * | 2010-10-27 | 2012-05-03 | Merus Aps | Audio amplifier using multi-level pulse width modulation |
| WO2019235181A1 (en) * | 2018-06-04 | 2019-12-12 | 株式会社村田製作所 | Radio frequency front-end module and communication device |
-
2021
- 2021-11-04 CN CN202111302035.7A patent/CN114257702B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07212675A (en) * | 1994-01-24 | 1995-08-11 | Rohm Co Ltd | Television video signal processing circuit |
| CN101106368A (en) * | 2006-07-12 | 2008-01-16 | 华硕电脑股份有限公司 | Sound explosion proof circuit |
| JP2009152948A (en) * | 2007-12-21 | 2009-07-09 | Seiko Epson Corp | Image processing circuit, regulating method therefor, and electronic apparatus |
| CN101662712A (en) * | 2008-08-28 | 2010-03-03 | 深圳富泰宏精密工业有限公司 | Microphone circuit |
| CN102624348A (en) * | 2011-01-28 | 2012-08-01 | 瑞萨电子株式会社 | Semiconductor integrated circuit and operation method of the same |
| CN102858146A (en) * | 2011-06-28 | 2013-01-02 | 湖南纽曼数码科技有限公司 | Vehicular equipment |
| CN202872884U (en) * | 2012-09-28 | 2013-04-10 | 青岛海信移动通信技术股份有限公司 | Audio output circuit and mobile terminal |
| CN105208494A (en) * | 2015-09-30 | 2015-12-30 | 惠州Tcl移动通信有限公司 | Three-in-one audio device |
| CN210351117U (en) * | 2019-07-22 | 2020-04-17 | 重庆惠科金扬科技有限公司 | Multifunctional signal switching circuit and display device |
| CN113097669A (en) * | 2021-04-16 | 2021-07-09 | 北京无线电测量研究所 | Tunable filter |
Non-Patent Citations (1)
| Title |
|---|
| 水声通信模拟信号处理电路设计;康真威;《声学与电子工程》;全文 * |
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