CN202406248U

CN202406248U - Digital interphone

Info

Publication number: CN202406248U
Application number: CN201120472791XU
Authority: CN
Inventors: 陈伟
Original assignee: XIAMEN CITY PUXING ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: XIAMEN CITY PUXING ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-11-24
Filing date: 2011-11-24
Publication date: 2012-08-29
Anticipated expiration: 2021-11-24

Abstract

The utility model relates to the technical field of electronic communication equipment, and provides a digital interphone having the advantages of high transmitting power, capacity for freely selecting different public frequency ranges according to needs, and capacity for emitting a signal for help in emergency. The digital interphone comprises an antenna, a radio-frequency transmit-receive module, a decoder, a CPU (Central Processing Unit) control system, a digital voice processing module, a keyboard input module, a display module, a memory, and a power supply module; wherein the digital voice processing module comprises an analog-to-digital/digital-to-analog conversion circuit, a voice transmit-receive circuit, a loudspeaker and a microphone; the digital voice processing module is connected with the CPU control system through the decoder; the radio-frequency transmit-receive module, the keyboard input module, the display module, the memory, and the power supply module are all connected with the CPU control system; a high-frequency amplification and filtering module is arranged between the antenna and the radio-frequency transmit-receive module; and the CPU control system is also connected with a GPS (Global Positioning System) positioning module which is connected with the keyboard input module.

Description

Digital handset

Technical field

The utility model relates to the electronics technical field, particularly a kind of digital handset.

Background technology

At present, the intercom market of China remains analog intercom and occupies an leading position.But the simulation intercom exists many shortcomings with not enough: one of which; What the simulation intercom transmitted is analog signal, and signal processing mode is simple, and consumed power is bigger; Can not eliminate effectively and disturb and The noise, cause that speech quality can not be satisfactory under many situation; Its two, the simulation intercom frequency efficiency not high, channel capacity is low; Its three, simulation intercom confidentiality is poor, is eavesdropped easily.

Chinese patent number: 200510032685.9 patent documentation discloses a kind of 400MHz common frequency range digital intercom; Comprise voice transmitting-receiving circuit, RF transmit-receive circuit, control circuit, power circuit, digital speech processing module; Said digital speech processing module is connected with control circuit, voice transmitting-receiving circuit, power circuit respectively, and is connected with RF transmit-receive circuit through analog to digital conversion circuit.Utilize aforementioned digital handset to realize the method for communication; Mainly be to utilize the digital speech processing module that the baseband analog voice signal is carried out digital processing; The generation digital baseband transmits, and produces the output modulated-analog signal through digital-to-analogue conversion again and offers RF transmit-receive circuit; And demodulated baseband signal carried out analog-to-digital conversion, and produce digital baseband and receive signal, its processing is obtained audio digital signals, become the ABB voice signal through digital-to-analogue conversion again, offer loud speaker.

The advantage of this invention be have strong interference immunity, speech quality is good, the availability of frequency spectrum is high, low in energy consumption, degree of integration is high, function upgrading expansion easily.But this intercom yet has certain defective, and Frequency Band Selection is more single, only is suitable for the common frequency band of 400M, can not satisfy different needs.Transmitting power is big inadequately, and the dry ratio of letter that signal receives is less relatively; When the operator ran into accident, the called party was not sure of its position under special circumstances, and then can not effectively help it.

The utility model content

Therefore, to above-mentioned problem, it is big that the utility model proposes a kind of transmitting power, can freely select different common frequency bands as required, and emergency can be sent the digital handset of help signal.

For solving this technical problem; The utility model is taked following scheme: a kind of digital handset; Comprise antenna, RF receiving and transmission module, decoder, system control cpu, digital speech processing module, keyboard input module, display module, memory and power module; Said digital speech processing module comprises modulus/D/A converting circuit, voice transmitting-receiving circuit, loud speaker and microphone; Said digital speech processing module is connected with system control cpu through decoder, and said RF receiving and transmission module, keyboard input module, display module, memory and power module all are connected with system control cpu, is provided with high frequency between said antenna and the RF receiving and transmission module and amplifies and filtration module; Said system control cpu also connects a GPS locating module, and this GPS locating module also is connected with the keyboard input module.

Further, said high frequency amplifies and filtration module comprises high-frequency amplifier circuit, frequency mixer and filter, and this high-frequency amplifier circuit is connected with antenna, and filter is connected with the receiving terminal of RF receiving and transmission module.

Further, said memory is provided with the key storage card, is provided with the compress speech decompression module between the modulus/D/A converting circuit of said digital speech processing module and the decoder.

Through adopting the aforementioned techniques scheme, the beneficial effect of the utility model is:

1, it is big that the digital handset of employing the utility model production has transmitting power, can freely select different common frequency bands as required;

2, through the GPS navigation system is set,, emergency can send help signal when taking place through the urgent transmission button on the keyboard;

3, voice encryption is set, improve the confidentiality of communication.

Description of drawings

Fig. 1 is the system block diagram of the utility model embodiment.

Embodiment

Combine accompanying drawing and embodiment that the utility model is further specified at present.

With reference to figure 1; A kind of digital handset of preferred the utility model; Comprise antenna 1, RF receiving and transmission module 2, decoder 3, system control cpu 4, digital speech processing module 5, keyboard input module 6, display module 7, memory 8 and power module 9; Said digital speech processing module 5 comprises modulus/D/A converting circuit 51, voice transmitting-receiving circuit 52, loud speaker 53 and microphone 54; Said digital speech processing module 5 is connected with system control cpu 4 through decoder 3; Said RF receiving and transmission module 2, keyboard input module 6, display module 7, memory 8 and power module 9 all are connected with system control cpu 4; Be provided with high frequency between said antenna 1 and the RF receiving and transmission module 2 and amplify and filtration module 10, said system control cpu 4 also connects a GPS locating module 11, and this GPS locating module 11 also is connected with keyboard input module 6.Said high frequency amplifies and filtration module 10 comprises high-frequency amplifier circuit, frequency mixer and filter, and this high-frequency amplifier circuit is connected with antenna 1, and filter is connected with the receiving terminal of RF receiving and transmission module 2.Said memory 8 is provided with the key storage card, is provided with compress speech decompression module 12 between the modulus/D/A converting circuit 51 of said digital speech processing module 5 and the decoder 3.

Wherein, System control cpu is that P18F67J10 chip and peripheral circuit are formed by model; The modulus D/A converting circuit is that voice CODEC chip and the peripheral circuit of MC145483 formed by model; Decoder is that audio coding decoding chip and the peripheral circuit of PCM3500 formed by model; The compress speech decompression module is that AMBE2000 chip and peripheral circuit are formed by model, and the key storage card in the memory is that PIC18F25J10 chip and peripheral circuit are formed by model, and the GPS locating module is that HOLUX-M-98 chip and peripheral circuit are formed by model.

The operation principle of the digital handset of the foregoing description comprises that signal receives processing procedure and signal emission processing procedure.At first; Signal receives processing procedure: through antenna by the RF receiving and transmission module received RF signal; This radiofrequency signal amplified with filtration module through high frequency amplify and the elimination garbage, utilize decoder this signal is encoded and to be stored in the memory through system control cpu control again, the key storage card in the use memory can be encrypted this signal; Extract the ciphered data information that matees with this machine according to signaling; Then this ciphered data information is carried out decompress(ion) through the compress speech decompression module, decode through decoder again, produce the PCM signal; Decoded PCM signal is carried out the D/A conversion through the modulus D/A converting circuit, come out through loudspeaker plays through the voice transmitting-receiving circuit.Secondly, signal emission processing procedure: the modulus D/A converting circuit carries out the A/D sampling to the analog voice signal that is received through the voice transmitting-receiving circuit by microphone, changes into corresponding PCM signal; Deliver to the compress speech decompression module to the PCM signal and carry out compress-encrypt; Encode through decoder again, produce data-signal, be sent to the system control cpu storage; And, go out through antenna transmission by RF receiving and transmission module again through high frequency amplification and filtration module amplification.For the GPS location then is through on the keyboard input module, being provided with control transmitting emergency help signal button, when the needs flash appeal, through putting through urgent button, through control GPS locating module current user position is positioned, and it is helped.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; Can make various variations to the utility model in form with on the details, be the protection range of the utility model.

Claims

1. digital handset; Comprise antenna, RF receiving and transmission module, decoder, system control cpu, digital speech processing module, keyboard input module, display module, memory and power module; Said digital speech processing module comprises modulus/D/A converting circuit, voice transmitting-receiving circuit, loud speaker and microphone; Said digital speech processing module is connected with system control cpu through decoder; Said RF receiving and transmission module, keyboard input module, display module, memory and power module all are connected with system control cpu; It is characterized in that: be provided with high frequency between said antenna and the RF receiving and transmission module and amplify and filtration module, said system control cpu also connects a GPS locating module, and this GPS locating module also is connected with the keyboard input module.

2. digital handset according to claim 1; It is characterized in that: said high frequency amplifies and filtration module comprises high-frequency amplifier circuit, frequency mixer and filter; This high-frequency amplifier circuit is connected with antenna, and filter is connected with the receiving terminal of RF receiving and transmission module.

3. digital handset according to claim 1 is characterized in that: said memory is provided with the key storage card, is provided with the compress speech decompression module between the modulus/D/A converting circuit of said digital speech processing module and the decoder.