CN202334679U - Voice interface of remote data and audio transmission device - Google Patents

Abstract

The utility model particularly relates to a voice interface of a remote data and audio transmission device, which is characterized by comprising a primary mutual inductor, a secondary mutual conductor, a 2/4 line conversion and echo cancelling module, an input filter module, a ringing detection module, a DC load module and an off-hook and on-hook detection module, wherein the 2/4 line conversion and echo cancelling module is connected between two end lines of the primary mutual inductor; the DC load module, the ringing detection module and the input filter module are connected between two end lines of the secondary mutual inductor in parallel according to the sequence from inside to outside, and the off-hook and on-hook detection module is arranged between the primary mutual inductor and the secondary mutual conductor. The voice interface has the advantages of simple structure, stable and reliable performance and good voice conversion quality. The 2/4 line conversion and echo cancelling module gets rid of the traditional coupling coil technology and adopts a novel thick film integrated circuit technology, thus the voice interface has the characteristics of small volume, high reliability and reduced voice signal attenuation, and ensures that the conversion quality is greatly enhanced.

Description

A kind of speech interface of remote simultaneous data and speech transmission equipment

Technical field

The utility model is specifically related to a kind of speech interface of remote simultaneous data and speech transmission equipment.

Background technology

Can not converse simultaneously during Common Facsimile Machine transmission data, data need be separated with speech and transmitted, and facsimile machine can only receive on the public telephone network (PSTN), and transmission medium is single;

IP phone is based on the TCP/IP procotol, and the real-time of conversation is poor, and under the communication conditions condition of poor, time-delay can appear in speech, will cause voice call to carry out when serious;

Uses DSVD MODEM to accomplish voice and be connected work, but the flexibility of design not very big like this, is fixed rate like voice rate that the transmission that this point will have influence on long distance realizes with data multiplexing demultiplexing and transmission.And because MODEM pays the utmost attention to the transmission of voice, the increase that might bring data transmission delay in this case.The DSVD Modem that is used for the PSTN net that can see in the market can only accomplish a little-connection, then also needs special multipoint control unit (MCU), general more complicated if realize the multiple spot linkage function.

The people is for addressing the above problem in application; Designed a kind of based on wired remote simultaneous data and speech transmission equipment; This equipment is realized the multiplexing packing and the demultiplexing of data, voice by CPU, and MODEM is set to data pattern, finally realizes the extraordinary full-duplex data of real-time, speech simultaneous interpretation.For this reason, the applicant has developed a kind of and speech interface this matched.Traditional speech interface is owing to have defectives such as signal attenuation is big, the Echo Cancellation processing is bad; The voice call effect that influence is actual; And the traditional voice interface only has a kind of interface modes, and simultaneous data and speech transmission equipment according to the actual requirements an interface must possess two kinds of mode of operations.

The utility model content

The purpose of the utility model is to solve traditional speech interface can't be applied to the defective on the simultaneous data and speech transmission equipment, and a kind of speech interface that has the remote simultaneous data and speech transmission equipment of Echo Cancellation function is provided, and possesses two kinds of mode of operations.

The utility model is realized through following technical scheme:

It is a kind of speech interface of remote simultaneous data and speech transmission equipment; It is characterized in that comprising instrument transformer, the conversion of 2/4 line and the Echo Cancellation module, input filtration module, ring detection module, DC load module, the dislodging machine testing module that are provided with primary side and secondary side; Said 2/4 line conversion and Echo Cancellation module are connected between two end lines of instrument transformer primary side; DC load module, ring detection module and input filtration module are connected in parallel between two end lines of instrument transformer secondary side according to order from inside to outside, and dislodging machine testing module is between instrument transformer primary side and secondary side.

Be connected to ring detection module and dislodging machine testing module simultaneously through parallel way on this speech interface, the CPU of equipment exports control signal according to different application environments, and the ring detection module or the machine testing module of seting out are inserted in the speech interface circuit.

When the utility model was applied in the simultaneous data and speech transmission equipment, the primary side of instrument transformer was connected with the compress speech coding/decoding module, and the secondary side of instrument transformer is connected with telephone wire.

Each module that the utility model adopts is prior art, and its concrete structure and principle no longer are described in detail.

The utility model is the difference of telephone set or exchanger user interface according to connected equipment, and speech interface can be set to telephony side or two kinds of different interface modes of exchange end, under the operation of system control processor, accomplishes the operation of subscriber line signaling.The utlity model has advantage simple in structure, stable and reliable for performance, that voice call quality is good.The conversion of 2/4 line and the Echo Cancellation module of the utility model, the coupling coil of forgoing traditional technology adopts novel " thick vlsi die " technology, has the advantages that volume is little, reliability is high, the voice signal decay is little, makes speech quality obtain the raising of matter.

Description of drawings

Fig. 1 is the structural principle block diagram of the utility model.

Shown in figure: 1. compress speech coding/decoding module; 2.2/4 line conversion and Echo Cancellation module; 3. instrument transformer primary side; 4. instrument transformer secondary side; 5. DC load module; 6. ring detection module; 7. input filtration module; 8 telephone wires; 9 dislodging machine testing modules; 10 power feeding modules.

Embodiment

As shown in Figure 1: conversion of 2/4 line and Echo Cancellation module 2 are connected between two end lines of instrument transformer primary side 3; DC load module 5, ring detection module 6 and input filtration module 7 are connected in parallel between two end lines of instrument transformer secondary side 4 according to order from inside to outside, and dislodging machine testing module 9 is between instrument transformer primary side 3 and secondary side 4.

When the utility model was applied in the simultaneous data and speech transmission equipment, instrument transformer first siding ring 3 was connected with compress speech coding/decoding module 1, and instrument transformer second siding ring 4 is connected with telephone wire 8.

CPU is provided with pattern output control signal according to the interface of reality during device power-up; The ring detection module 6 or the machine testing module 9 of seting out are inserted in the speech interface circuit; Dislodging machine testing module 9 is linked in the speech interface circuit when being set to telephony side; Ring detection module 6 is unsettled, and ring detection module 6 is linked in the speech interface circuit when being set to exchange end, and dislodging machine testing module 9 is unsettled.

With the exchange end interface modes is example: telephone wire 8 connects the user interface of stored-program control exchange; Stored-program control exchange output bell signal, signal gets into ring detection module 6 after 7 filtering of input filtration module, and ring detection module 6 is exported the off-hook control signal after detecting bell signal; DC load module 5 is linked in the speech interface circuit; DC load module 5 with the DC feedback voltage on the circuit by hypermutation at the bottom of, the telephone line off-hook, talking link is set up.The voice signal of stored-program control exchange output subsequently gets into instrument transformer secondary side 4 after 7 filtering of input filtration module; Utilize the Signal Spacing of instrument transformer; Effectively protection back-end processing circuit produces identical, stable voice signal at instrument transformer primary side 3, and this signal belongs to analog signal; Analog signal is after conversion of 2/4 line and 2 processing of Echo Cancellation module; Be converted into compress speech coding/decoding module 1 manageable digital signal, conversion of 2/4 line and Echo Cancellation module 2 that the utility model adopts are prior art, finally accomplish Signal Processing.

During the telephony side interface modes, telephone wire 8 connects ordinary telephone set, and working method and existing conventional art are similar basically, this no longer tired stating.

Claims (1)

1. the speech interface of a remote simultaneous data and speech transmission equipment; It is characterized in that comprising instrument transformer, the conversion of 2/4 line and the Echo Cancellation module, input filtration module, ring detection module, DC load module, the dislodging machine testing module that are provided with primary side and secondary side; Said 2/4 line conversion and Echo Cancellation module are connected between two end lines of instrument transformer primary side; DC load module, ring detection module and input filtration module are connected in parallel between two end lines of instrument transformer secondary side according to order from inside to outside, and dislodging machine testing module is between instrument transformer primary side and secondary side.

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