CN102780506A - Audio transmission chip and portable device with same - Google Patents
Audio transmission chip and portable device with same Download PDFInfo
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- CN102780506A CN102780506A CN2012102975844A CN201210297584A CN102780506A CN 102780506 A CN102780506 A CN 102780506A CN 2012102975844 A CN2012102975844 A CN 2012102975844A CN 201210297584 A CN201210297584 A CN 201210297584A CN 102780506 A CN102780506 A CN 102780506A
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Abstract
The invention relates to an audio transmission chip and a portable device with the same, wherein the audio transmission chip comprises an audio processing module for performing digital-to-analogue conversion, pre-emphasizing treatment and dynamic range contraction on an audio signal, and a modulator for converting the audio signal output by the audio processing module into a radio frequency signal according to a channel selection signal; and the audio processing module and the modulator are integrated in a single integrated circuit. The audio transmission chip is capable of reducing the cost of the audio transmission device.
Description
Technical field
The present invention relates to microelectronic, relate in particular to a kind of audio transmission chip, have the portable equipment of audio transmission chip.
Background technology
The voiceband facility that audio signal is converted into radiofrequency signal is widely used in each field, for example: WLAN, RF tag, global positioning system, wireless broadcast system, mobile phone, cordless telephone etc.
As shown in Figure 1; Structural representation for a kind of voiceband facility in the prior art; Comprise amplifier 11, analog modulator 12, power amplifier 13 and transmitting antenna 14, simulated audio signal amplifies through amplifier 11, and the simulated audio signal after the amplification is converted into the simulation modulated signal through analog modulator 12; This simulation modulated signal is launched through transmitting antenna 14 after power amplifier 13 carries out power amplification.
But because the frequency range of simulated audio signal is lower, the capacitor and inductor that causes adopting in this equipment is bigger, so can only adopt discrete component to realize this equipment, makes that like this cost of this equipment is higher.
Summary of the invention
The present invention provides a kind of audio transmission chip, has the portable equipment of audio transmission chip, in order to realize reducing the cost of voiceband facility.
The present invention provides a kind of audio transmission chip, comprising:
Audio processing modules is used for that audio signal is carried out digital-to-analogue conversion, preemphasis processing and dynamic range and shrinks;
Modulator is used for according to channel selecting signal, and the audio signal that said audio processing modules is exported converts radiofrequency signal into;
Said audio processing modules and said modulator are integrated in the single integrated circuit.
The present invention also provides a kind of portable equipment with audio transmission chip, comprising:
The channel option interface;
Audio input interface;
The audio transmission chip;
The radiofrequency signal output interface;
Wherein, said audio transmission chip comprises arbitrary module of aforementioned audio transmission chip.
In the present invention, owing to adopted the digitlization integrated circuit to realize voiceband facility, reduced the cost of voiceband facility.In addition, this audio transmission chip has adopted the dynamic range contraction technology, has improved the quality of the audio signal of transmission.
Description of drawings
Fig. 1 is the structural representation of a kind of voiceband facility in the prior art;
Fig. 2 is the structural representation of audio transmission chip embodiment of the present invention;
Fig. 3 A is first kind of structural representation of audio transmission chip embodiment sound intermediate frequency processing module of the present invention;
Fig. 3 B is second kind of structural representation of audio transmission chip embodiment sound intermediate frequency processing module of the present invention;
Fig. 3 C is the third structural representation of audio transmission chip embodiment sound intermediate frequency processing module of the present invention;
Fig. 3 D is the 4th kind of structural representation of audio transmission chip embodiment sound intermediate frequency processing module of the present invention;
Fig. 3 E is the 5th kind of structural representation of audio transmission chip embodiment sound intermediate frequency processing module of the present invention;
Fig. 3 F is the 6th kind of structural representation of audio transmission chip embodiment sound intermediate frequency processing module of the present invention;
Shown in Figure 4, have the structural representation of the portable equipment embodiment of integrated audio transmitter for the present invention.
Embodiment
Below in conjunction with Figure of description and embodiment the present invention is done further description.
As shown in Figure 2, be the structural representation of audio transmission chip embodiment of the present invention, this audio transmission chip can comprise audio processing modules 21 and modulator 22.Audio processing modules 21 is integrated in the single integrated circuit with modulator 22.This integrated circuit can adopt the technology that complementary metal oxide semiconductors (CMOS) (CMOS) technology, BiCMOS technology or any other want to adopt or the combination manufacturing of technology.
Audio processing modules 21 is used for that audio signal is carried out digital-to-analogue conversion, preemphasis processing and dynamic range and shrinks; Modulator 22 is used for according to channel selecting signal, and the audio signal that audio processing modules 21 is exported converts radiofrequency signal into.
The dynamic range contraction technology is transmission again after the dynamic range of the audio signal of being transmitted is compressed effectively, adopts this technology can produce speech more clearly, makes in noisy environment, still can keep unimpeded contact to have very much practical value.
Further; Audio processing modules 21 can have following six kinds of structures: shown in Fig. 3 A; First kind of structural representation for audio transmission chip embodiment sound intermediate frequency processing module of the present invention; Audio processing modules 21 can comprise simulation pre-emphasis unit 211, analog to digital converter 212 and digital dynamic range converting unit 213, and analog to digital converter 212 is connected with simulation pre-emphasis unit 211, and digital dynamic range converting unit 213 is connected with analog to digital converter 212.Wherein, simulation pre-emphasis unit 211 is used for audio signal is carried out the preemphasis processing; Analog to digital converter 212 is used for the audio signal after the preemphasis processing is carried out analog-to-digital conversion, obtains digital audio and video signals; Digital dynamic range converting unit 213 is used for that digital audio and video signals is carried out dynamic range and shrinks.
Shown in Fig. 3 B; Second kind of structural representation for audio transmission chip embodiment sound intermediate frequency processing module of the present invention; This audio processing modules can comprise analog to digital converter 212, digital pre-emphasis unit 214 and digital dynamic range converting unit 213; Numeral pre-emphasis unit 214 is connected with analog to digital converter 212, and digital dynamic range converting unit 213 is connected with digital pre-emphasis unit 214.Wherein, analog to digital converter 212 is used for audio signal is carried out analog-to-digital conversion, obtains digital audio and video signals; Numeral pre-emphasis unit 214 is used for that digital audio and video signals is carried out preemphasis and handles; Digital dynamic range converting unit 213 is used for that the digital audio and video signals after the preemphasis processing is carried out dynamic range and shrinks.
Shown in Fig. 3 C; The third structural representation for audio transmission chip embodiment sound intermediate frequency processing module of the present invention; Be with the difference of structural representation shown in Fig. 3 B; Digital dynamic range converting unit 213 is connected with analog to digital converter 212, and digital pre-emphasis unit 214 is connected with digital dynamic range converting unit 213.Wherein, analog to digital converter 212 is used for audio signal is carried out analog-to-digital conversion, obtains digital audio and video signals; Digital dynamic range converting unit 213 is used for that digital audio and video signals is carried out dynamic range and shrinks; Numeral pre-emphasis unit 214 is used for that the digital audio and video signals after shrinking is carried out preemphasis and handles.
Shown in Fig. 3 D; The 4th kind of structural representation for audio transmission chip embodiment sound intermediate frequency processing module of the present invention; Audio processing modules 21 can comprise simulation pre-emphasis unit 211, simulation dynamic range converting unit 215 and analog to digital converter 212; Simulation dynamic range converting unit 215 is connected with simulation pre-emphasis unit 211, and analog to digital converter 212 is connected with simulation dynamic range converting unit 215.Wherein, simulation pre-emphasis unit 211 is used for audio signal is carried out the preemphasis processing; Simulation dynamic range converting unit 215 is used for that the audio signal after the preemphasis processing is carried out dynamic range and shrinks; Analog to digital converter 212 is used for the audio signal after shrinking is carried out analog-to-digital conversion.
Shown in Fig. 3 E; The 5th kind of structural representation for audio transmission chip embodiment sound intermediate frequency processing module of the present invention; Be with the difference of Fig. 3 D; Simulation pre-emphasis unit 211 is connected with simulation dynamic range converting unit 215, and analog to digital converter 212 is connected with simulation dynamic range converting unit 215.Wherein, simulation dynamic range converting unit 215 is used for audio signal is carried out the dynamic range contraction; Simulation pre-emphasis unit 211 is used for that the audio signal after shrinking is carried out preemphasis and handles; Analog to digital converter 212 is used for the audio signal after the preemphasis processing is carried out analog-to-digital conversion.
Shown in Fig. 3 F; The 6th kind of structural representation for audio transmission chip embodiment sound intermediate frequency processing module of the present invention; This audio processing modules can comprise simulation dynamic range converting unit 215, analog to digital converter 212 and digital pre-emphasis unit 214; Analog to digital converter 212 is connected with simulation dynamic range converting unit 215, and digital pre-emphasis unit 214 is connected with analog to digital converter 212.Simulation dynamic range converting unit 215 is used for that audio signal is carried out dynamic range and shrinks; Analog to digital converter 212 is used for the audio signal after shrinking is carried out analog-to-digital conversion, obtains digital audio and video signals; Numeral pre-emphasis unit 214 is used for that digital audio and video signals is carried out preemphasis and handles.
In the present embodiment, modulator 22 specifically can be frequency synthesizer, and this frequency synthesizer can be Direct Digital frequency synthesizer (Direct Digital synthesizer, abbreviation: DDS) again.
Referring to Fig. 2, present embodiment can also comprise power amplifier 23 on the basis that comprises audio processing modules 21 and modulator 22, be connected with modulator 22 again.Power amplifier 23 together is integrated in the single integrated circuit with audio processing modules 21 and modulator 22.Power amplifier 23 is used for radiofrequency signal is carried out power amplification.The gain of power amplifier 23 can be fixed value, also can be adjustable value.
In the present embodiment, owing to adopted integrated circuit to realize audio transmission, the cost of integrated circuit has reduced much than the cost of resolution element, thereby has reduced the cost of voiceband facility.
In addition, this audio transmission chip has adopted the dynamic range contraction technology, has improved the quality of the audio signal of transmission.
As shown in Figure 4, the structural representation for the present invention has the portable equipment embodiment of integrated audio transmitter can comprise channel option interface 41, audio input interface 42, audio transmission chip 43, radiofrequency signal output interface 44.Channel option interface 41, audio input interface 42 and radiofrequency signal output interface 44 are connected with audio transmission chip 43.
Wherein, audio transmission chip 43 can comprise arbitrary module among the aforementioned audio transmission chip embodiment, repeats no more at this.
Referring to Fig. 4, this portable equipment can also comprise transmitting antenna 14 and sound transducer 45 again, and transmitting antenna 14 is connected with radiofrequency signal output interface 44, and sound transducer 45 is connected with audio input interface 42.Sound transducer 45 is converted into audio signal with acoustic information, sends to integrated audio transmission chip 43 through audio input interface.Sound transducer 45 specifically can be converted into acoustic information the equipment of audio signal for microphone or other.Transmitting antenna 14 is gone out emission of radio frequency signals.
What should explain at last is: above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and the scope of technical scheme of the present invention.
Claims (13)
1. an audio transmission chip is characterized in that, comprising:
Audio processing modules is used for that audio signal is carried out digital-to-analogue conversion, preemphasis processing and dynamic range and shrinks;
Modulator is used for according to channel selecting signal, and the audio signal that said audio processing modules is exported converts radiofrequency signal into;
Said audio processing modules and said modulator are integrated in the single integrated circuit.
2. audio transmission chip according to claim 1 is characterized in that, said audio processing modules comprises:
The simulation pre-emphasis unit is used for that audio signal is carried out preemphasis and handles;
Analog to digital converter is used for the audio signal after the preemphasis processing is carried out analog-to-digital conversion, obtains digital audio and video signals;
The digital dynamic range converting unit is used for that said digital audio and video signals is carried out dynamic range and shrinks.
3. audio transmission chip according to claim 1 is characterized in that, said audio processing modules comprises:
Analog to digital converter is used for audio signal is carried out analog-to-digital conversion, obtains digital audio and video signals;
The numeral pre-emphasis unit is used for that said digital audio and video signals is carried out preemphasis and handles;
The digital dynamic range converting unit is used for that the digital audio and video signals after the preemphasis processing is carried out dynamic range and shrinks.
4. audio transmission chip according to claim 1 is characterized in that, said audio processing modules comprises:
Analog to digital converter is used for audio signal is carried out analog-to-digital conversion, obtains digital audio and video signals;
The digital dynamic range converting unit is used for that digital audio and video signals is carried out dynamic range and shrinks;
The numeral pre-emphasis unit is used for that the digital audio and video signals after shrinking is carried out preemphasis and handles.
5. audio transmission chip according to claim 1 is characterized in that, said audio processing modules comprises:
The simulation pre-emphasis unit is used for that audio signal is carried out preemphasis and handles;
Simulation dynamic range converting unit is used for that the audio signal after the preemphasis processing is carried out dynamic range and shrinks;
Analog to digital converter is used for the audio signal after shrinking is carried out analog-to-digital conversion.
6. audio transmission chip according to claim 1 is characterized in that, said audio processing modules comprises:
Simulation dynamic range converting unit is used for that audio signal is carried out dynamic range and shrinks;
The simulation pre-emphasis unit is used for that the audio signal after shrinking is carried out preemphasis and handles;
Analog to digital converter is used for the audio signal after the preemphasis processing is carried out analog-to-digital conversion.
7. audio transmission chip according to claim 1 is characterized in that, said audio processing modules comprises:
Simulation dynamic range converting unit is used for that audio signal is carried out dynamic range and shrinks;
Analog to digital converter is used for the audio signal after shrinking is carried out analog-to-digital conversion, obtains digital audio and video signals;
The numeral pre-emphasis unit is used for that said digital audio and video signals is carried out preemphasis and handles.
8. audio transmission chip according to claim 1 is characterized in that, said modulator is a frequency synthesizer.
9. audio transmission chip according to claim 8 is characterized in that, said frequency synthesizer is the Direct Digital frequency synthesizer.
10. audio transmission chip according to claim 1 is characterized in that, also comprises:
Power amplifier is used for said radiofrequency signal is carried out power amplification;
Said power amplifier is integrated in the said integrated circuit.
11. audio transmission chip according to claim 10 is characterized in that, the Gain Adjustable of said power amplifier.
12. audio transmission chip according to claim 1 is characterized in that, the integrated circuit of said integrated circuit for adopting CMOS technology to make.
13. the portable equipment with audio transmission chip is characterized in that, comprising:
The channel option interface;
Audio input interface;
The audio transmission chip;
The radiofrequency signal output interface;
Wherein, said audio transmission chip comprises the arbitrary described audio transmission chip of claim 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102975844A CN102780506A (en) | 2012-08-20 | 2012-08-20 | Audio transmission chip and portable device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102975844A CN102780506A (en) | 2012-08-20 | 2012-08-20 | Audio transmission chip and portable device with same |
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| Publication Number | Publication Date |
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| CN102780506A true CN102780506A (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102975844A Pending CN102780506A (en) | 2012-08-20 | 2012-08-20 | Audio transmission chip and portable device with same |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1041811A (en) * | 1996-07-24 | 1998-02-13 | Matsushita Electric Ind Co Ltd | Pll integrated circuit |
| CN202261245U (en) * | 2011-08-25 | 2012-05-30 | 北京昆腾微电子有限公司 | Integrated audio transmitter, portable equipment with integrated audio transmitter, integrated audio receiver, portable equipment with integrated audio receiver and audio communication system |
| CN202713290U (en) * | 2012-08-20 | 2013-01-30 | 北京昆腾微电子有限公司 | Audio transmission chip and portable device with same |
-
2012
- 2012-08-20 CN CN2012102975844A patent/CN102780506A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1041811A (en) * | 1996-07-24 | 1998-02-13 | Matsushita Electric Ind Co Ltd | Pll integrated circuit |
| CN202261245U (en) * | 2011-08-25 | 2012-05-30 | 北京昆腾微电子有限公司 | Integrated audio transmitter, portable equipment with integrated audio transmitter, integrated audio receiver, portable equipment with integrated audio receiver and audio communication system |
| CN202713290U (en) * | 2012-08-20 | 2013-01-30 | 北京昆腾微电子有限公司 | Audio transmission chip and portable device with same |
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Application publication date: 20121114 |