CN101621853B - Audio enabled device and audio enabled method - Google Patents
Audio enabled device and audio enabled method Download PDFInfo
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- CN101621853B CN101621853B CN2009101506842A CN200910150684A CN101621853B CN 101621853 B CN101621853 B CN 101621853B CN 2009101506842 A CN2009101506842 A CN 2009101506842A CN 200910150684 A CN200910150684 A CN 200910150684A CN 101621853 B CN101621853 B CN 101621853B
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Abstract
The invention provides an audio enabled device. A network-shedding through audio circuit demodulates an input demodulating signal under a network-shedding through mode, a control signal is output to a main control module according to a demodulating result, and the control signal is used for indicating whether the demodulation is successful. When the demodulation is successful, the obtained audio signal is output to a power amplifier after being processed; when the main control module receives the control signal, an enabled switch signal is output by the main control module to the power amplifier according to the control signal so as to control the power amplifier to open and close; when the power amplifier receives the enabled switch signal, the power amplifier is opened or closed; and when the power amplifier is opened, the audio signal which comes from the network-shedding through audio circuit is amplified and output. The audio enabled device and the audio enabled method control the opening condition of the audio power amplifier under different modes by a main control processor, and resources can be effectively used.
Description
Technical field
The present invention relates to the mobile communication technology field, be specifically related to a kind of network-off direct-passing situation subaudio frequency enabled device and method of digital packet terminal.
Background technology
Owing to be subjected to the restriction and the The noise of electromagnetic wave attenuation theory, be difficult to realize remote point-to-point communication between terminal and the terminal, so people to have erected with intensive MSC (mobile switching centre) be that the junction network system of core is with the telecommunication between the realization terminal.Because to the difference of the coding principle and the wireless communication protocol of information, these networks just are divided into usually our known GSM (global system for mobile communications), CDMA (code division multiple access), TD-SCDMA (TD SDMA), WCDMA (Wideband Code Division Multiple Access (WCDMA)) etc.
But the terminal that relies on these network services is not mostly supported DMO (the DirectMode Operation in the subrange, direct mode operation) communication, and communicate by letter at a lot of specific occasions DMO is that behaviour is required, and present this demand is still satisfied by traditional intercom industry.So just bring a problem just to be to use the crowd of intercom will carry a terminal equipment (being generally mobile phone) toward contact.In order to make user's few communication terminal that carries of trying one's best, can in terminal, increase the DMO function that the different modulating mode realizes.Increase DMO function terminal TMO (Trunked Mode Operation afterwards, cluster mode) and DMO part must use same set of audio frequency power amplifier, for TMO because circuit is based on different protocol standards exploitation, so it is had complete hardware control circuit and software control logic.When DMO partly works, reason owing to power saving, audio frequency power amplifier can not in running order always wait be exaggerated the arrival of signal, so this device is closed before not being exaggerated signal, needing to be input to audio frequency power amplifier after receiving circuit demodulates useful faint speech signal level amplifies and could drive loudspeaker, at this moment audio frequency power amplifier is closed again, so sound is had no idea through amplifying the rear drive loudspeaker.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of audio frequency enabled device and method, and the effectively opening and closing of control audio power amplifier realize network-off direct-passing situation subaudio frequency enlarging function.
In order to address the above problem, the invention provides a kind of audio frequency enabled device, comprise network-off direct-passing voicefrequency circuit, main control module and power amplifier, the network-off direct-passing voicefrequency circuit links to each other with power amplifier with main control module, main control module links to each other with power amplifier, wherein:
Described network-off direct-passing voicefrequency circuit, the modulation signal that is used for demodulation input under the network-off direct-passing pattern, export a control signal according to demodulation result and give main control module, this control signal indicates whether the demodulation success, outputs to power amplifier after the Audio Signal Processing that obtains when also being used for the demodulation success;
Described main control module when being used to receive described control signal, being exported an enable switch signal according to this control signal and is given power amplifier, and control power amplifiers opens or closes;
Described power amplifier when being used to receive described enable switch signal, opens or closes, when opening to amplify back output from the audio signal of network-off direct-passing voicefrequency circuit.
Further, said apparatus also can have following characteristics, and described main control module is a central processing unit.
Further, said apparatus also can have following characteristics, and described main control module is used for when control signal indication demodulation success, and output enable switching signal control power amplifiers is opened; When control signal indication demodulation failure, output enable switching signal control power amplifiers is closed.
Further, said apparatus also can have following characteristics, and described control signal is a level signal or pulse signal.
Further, said apparatus also can have following characteristics, described network-off direct-passing circuit also comprises a speech detection interface and speech detection circuit, described speech detection interface input links to each other with the speech detection circuit, output links to each other with main control module, wherein: when described speech detection interface is failed in the demodulation of speech detection circuit, export first level signal and give main control module; When speech detection circuit demodulation success, to export second level signal and give main control module, described second level signal is different with first level signal.
The present invention also provides a kind of audio frequency enabled method, comprising:
The modulation signal of network-off direct-passing voicefrequency circuit demodulation input under the network-off direct-passing pattern, export a control signal according to demodulation result and give main control module, this control signal indicates whether the demodulation success, outputs to power amplifier after the Audio Signal Processing that obtains during with the demodulation success;
When main control module is received described control signal, export an enable switch signal according to this control signal and give power amplifier, control power amplifiers opens or closes;
When power amplifier is received described enable switch signal, open or close, when opening to amplify back output from the audio signal of network-off direct-passing voicefrequency circuit.
Further, said method also can have following characteristics, and described main control module is a central processing unit.
Further, said method also can have following characteristics, and when control signal indication demodulation success, main control module output enable switching signal control power amplifiers is opened; When control signal indication demodulation failure, main control module output enable switching signal control power amplifiers is closed.
Further, said method also can have following characteristics, and described control signal is a level signal or pulse signal.
Further, said method also can have following characteristics, and described network-off direct-passing voicefrequency circuit is exported first level signal and given main control module when demodulation is failed; When the demodulation success, to export second level signal and give main control module, described second level signal is different with first level signal.
Audio frequency enabled device provided by the invention makes that TMO and DMO part can sharing audio power amplifier (being power amplifier) and loud speaker, and the situation of opening by main control processor control different mode subaudio frequency power amplifier is effectively utilized resource.
Description of drawings
Fig. 1 is an audio frequency enabled device schematic diagram of the present invention;
Logic level transition graph of a relation when Fig. 2 works for audio frequency enabled device of the present invention;
Fig. 3 is an audio frequency enabled method flow chart of the present invention.
Embodiment
Central idea of the present invention is, when the network-off direct-passing audio signal that receives need be handled, the network-off direct-passing voicefrequency circuit is exported a control signal and is given CPU, after CPU judges and discerns, by opening power amplifier with the output enable switching signal indication that is connected of power amplifier, power amplifier is started working after receiving the enable switch signal, handles the signal from the network-off direct-passing voicefrequency circuit.
Figure 1 shows that audio frequency enabled device block diagram of the present invention.Audio frequency enabled device of the present invention comprises a network-off direct-passing voicefrequency circuit (DMO voicefrequency circuit), a main control module (can adopt central processor CPU to realize) and a power amplifier (PA), one output of network-off direct-passing voicefrequency circuit links to each other with an input of main control module (as the I/O pin of CPU), another output links to each other with an input of power amplifier, the output of main control module enables control end with one of power amplifier and links to each other, wherein:
Described network-off direct-passing voicefrequency circuit, the modulation signal that is used under the DMO pattern outside being imported carries out demodulation, exports a control signal according to demodulation result and gives main control module, and this control signal indicates whether the demodulation success; Be input to power amplifier after the Audio Signal Processing that obtains when also being used for the demodulation success;
Described main control module after being used to receive the control signal of network-off direct-passing voicefrequency circuit, is exported an enable switch signal according to this control signal and is given power amplifier, and control power amplifiers opens or closes; Be specially, when control signal was designated as the demodulation success, output enable switching signal control power amplifiers was opened; When control signal was designated as the demodulation failure, output enable switching signal control power amplifiers was closed;
Described power amplifier, be used to receive the enable switch signal after, open or close, when opening to amplify back output from the audio signal of network-off direct-passing voicefrequency circuit.Wherein, power amplifier carries out voice signal to make its intensity have the ability of drive output audio playing apparatus (as loud speaker or loudspeaker) after the processing and amplifying, power amplifier is input to audio playing apparatus after audio signal is amplified, and drives the audio playing apparatus playing audio signal.
Wherein, the modulation signal of DMO voicefrequency circuit outside input of demodulation under the DMO pattern, normally high frequency or the intermediate-freuqncy signal after voice are modulated imported in the demodulation outside, and the voice signal that demodulates is carried out outputing to power amplifier after the respective handling.
Wherein, this control signal can be a level signal or a pulse signal, for example, is a high level signal at demodulation success time control system signal, and control signal is a low level signal when demodulation is failed; Perhaps, be the pulse train of one group of particular duty cycle at demodulation success time control system signal, control signal is a high level or low level signal when demodulation is failed; The present invention does not limit this.
When this control signal was a level signal, a concrete mode of the generation of this level signal was by a speech detection interface.Comprise a speech detection interface and a speech detection circuit in the DMO voicefrequency circuit, the input of this speech detection interface links to each other with speech detection circuit in the DMO voicefrequency circuit, and output links to each other with the input of main control module.This speech detection interface has two states (normality/level changes), whether the two states demodulator circuit of corresponding DMO respectively demodulates voice signal, promptly when speech detection circuit demodulated audio signal is failed, export first level signal (normality) and give CPU, when the success of speech detection circuit demodulated audio signal, to export second level signal (level change) and give CPU, first level signal is different with second level signal, first level signal can be low level, and second level signal can be high level; Perhaps, first level signal is a high level, and second level signal is a low level.The varying level state that main control module (for example I/O mouth of CPU) detects this pin comes the operating state of control power amplifiers.
Wherein, the enable switch signal can be a level signal.
Logic level transition relation when Figure 2 shows that the work of network-off direct-passing voicefrequency circuit.Hypothesis activation PA is high level (H represents), and this pin (being defined as the A pin temporarily, i.e. the I/O pin) was exported high level after the DMO voicefrequency circuit demodulated voice signal, otherwise was low level.Among Fig. 2, signal A represents the signal of I/O pin, and signal PA Enable representative is input to the enable switch signal of power amplifier, and wherein, when demodulation was failed, signal A was a low level, and the enable switch signal is a closed condition; When the demodulation success, signal A becomes high level, is delaying for the moment, and the enable switch signal becomes open mode, makes power amplifier start working.
Fig. 3 is described to be audio frequency enabled method flow chart of the present invention, and this flow process illustrates opens the process that power amplifier carries out the audio frequency amplification, specifically comprises:
Power amplifier receives when the enable switch signal of power amplifier is closed in indication, cuts out.
Claims (10)
1. an audio frequency enabled device is characterized in that, comprises network-off direct-passing voicefrequency circuit, main control module and power amplifier, and the network-off direct-passing voicefrequency circuit links to each other with power amplifier with main control module, and main control module links to each other with power amplifier, wherein:
Described network-off direct-passing voicefrequency circuit, the modulation signal that is used for demodulation input under the network-off direct-passing pattern, export a control signal according to demodulation result and give main control module, this control signal indicates whether the demodulation success, outputs to power amplifier after the Audio Signal Processing that obtains when also being used for the demodulation success;
Described main control module when being used to receive described control signal, being exported an enable switch signal according to this control signal and is given power amplifier, and control power amplifiers opens or closes;
Described power amplifier when being used to receive described enable switch signal, opens or closes, when opening to amplify back output from the audio signal of network-off direct-passing voicefrequency circuit.
2. device as claimed in claim 1 is characterized in that, described main control module is a central processing unit.
3. device as claimed in claim 1 is characterized in that, described main control module is used for when control signal indication demodulation success, and output enable switching signal control power amplifiers is opened; When control signal indication demodulation failure, output enable switching signal control power amplifiers is closed.
4. device as claimed in claim 1 is characterized in that, described control signal is a level signal or pulse signal.
5. device as claimed in claim 1, it is characterized in that, described network-off direct-passing voicefrequency circuit also comprises a speech detection interface and speech detection circuit, described speech detection interface input links to each other with the speech detection circuit, output links to each other with main control module, wherein: when described speech detection interface is failed in the demodulation of speech detection circuit, export first level signal and give main control module; When speech detection circuit demodulation success, to export second level signal and give main control module, described second level signal is different with first level signal.
6. an audio frequency enabled method is characterized in that, comprising:
The modulation signal of network-off direct-passing voicefrequency circuit demodulation input under the network-off direct-passing pattern, export a control signal according to demodulation result and give main control module, this control signal indicates whether the demodulation success, outputs to power amplifier after the Audio Signal Processing that obtains during with the demodulation success;
When main control module is received described control signal, export an enable switch signal according to this control signal and give power amplifier, control power amplifiers opens or closes;
When power amplifier is received described enable switch signal, open or close, when opening to amplify back output from the audio signal of network-off direct-passing voicefrequency circuit.
7. method as claimed in claim 6 is characterized in that, described main control module is a central processing unit.
8. method as claimed in claim 6 is characterized in that, when control signal indication demodulation success, main control module output enable switching signal control power amplifiers is opened; When control signal indication demodulation failure, main control module output enable switching signal control power amplifiers is closed.
9. method as claimed in claim 6 is characterized in that, described control signal is a level signal or pulse signal.
10. method as claimed in claim 6 is characterized in that, described network-off direct-passing voicefrequency circuit is exported first level signal and given main control module when demodulation is failed; When the demodulation success, to export second level signal and give main control module, described second level signal is different with first level signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101506842A CN101621853B (en) | 2009-06-29 | 2009-06-29 | Audio enabled device and audio enabled method |
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| CN2009101506842A CN101621853B (en) | 2009-06-29 | 2009-06-29 | Audio enabled device and audio enabled method |
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| CN101621853A CN101621853A (en) | 2010-01-06 |
| CN101621853B true CN101621853B (en) | 2011-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112965684B (en) * | 2019-12-12 | 2023-08-25 | 成都鼎桥通信技术有限公司 | Audio output control method and device |
| KR20230125012A (en) * | 2020-12-28 | 2023-08-28 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Relay communication method and device |
| CN114039619B (en) * | 2021-09-28 | 2023-05-09 | 三维通信股份有限公司 | Zero intermediate frequency radio frequency front-end circuit, system, radio frequency unit protection method and medium |
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