CN202503578U

CN202503578U - Embedded voice exchange system

Info

Publication number: CN202503578U
Application number: CN2011204814015U
Authority: CN
Inventors: 李勇; 蔡锦华; 邹禹; 徐刚; 张返立; 吴包琳
Original assignee: JIANGXI LIANCHUANG PRECISION ELECTROMECHANICAL Co Ltd
Current assignee: JIANGXI LIANCHUANG PRECISION ELECTROMECHANICAL Co Ltd
Priority date: 2011-11-28
Filing date: 2011-11-28
Publication date: 2012-10-24
Anticipated expiration: 2021-11-28

Abstract

The utility model discloses a multi-path IP speech processing technology and relates to an embedded voice exchange system, so that functions of 16-path voice exchange, 16-th session integration and VOIP voice access can be completed. The software utilizes a VxWorks operating system and a VOIP gateway protocol; a voice processing module is connected with an integrated communications processor through an HPI port and is connected with all user voice channels through a PCM interface. A bus driver / control logic / clock distribution module is connected with the integrated communications processor, the voice processing module, and the interface. According to the utility model, G.727 (a voice coding standard) coding and decoding functions can be carried out on voice and the requirement of the voice coding and decoding by the VOIP gateway can be met; therefore, the system can be applied to various VOIP systems. Meanwhile, communication network functions of 16-path voice coding and exchange as well as 16-path session integration can be realized.

Description

The embedded speech switching system

Technical field

The utility model relates to the network service electronic technology, particularly relates to a kind of embedded speech switching system.

Background technology

In recent years, along with the development of packet-switch technology, the voice service proportion of legacy circuit-switched form is on a declining curve, and the professional proportion of packet voice then rises year by year.The packet voice business is the voice service that on packet switching network, realizes; Transmission at the enterprising jargon sound data stream of packet switching network can make full use of the multiplexing characteristic of network statistics, improves the capacity of system; That at present the most frequently used is VoIP, i.e. IP telephone service.VoIP (networking telephone) is as a kind of IP-based data transmission technology; Utilize Internet (internet) worldwide interconnection environment widely; Traditional P STN (PSTN) and Internet are united two into one, can effectively reduce system cost and management cost.

Modal VOIP speech access device has one, two, four, eight spoken sound gateways etc., but these voice gateways basically only support point-to-point conversation and can not carry out conferencing function, can not give full play to the multiplexing advantage of network packet; Because each equipment producer technical merit just differs, implementation is had nothing in common with each other, aspects such as the quality of voice gateways, performance, cost all await improving simultaneously.

Summary of the invention

The purpose of the utility model proposes a kind of novel exchange of speech module, realizes that multichannel VOIP speech inserts and the reciprocal exchange of business, to satisfy access of multichannel IP speech and reciprocal exchange of business high integration, high reliability, low cost solution.

For realizing above-mentioned purpose, the technical scheme that the utility model adopts is on the MPC860T speech exchange system, to carry out the realization of multi-path voice processing and voice gateway based on VxWorks (a kind of embedded real-time operating system) system.The embedded speech switching system; Software uses vxworks operating system and standard VOIP gateway protocol; Hardware comprises integrated communicaton processor, speech processing module, bus driver/control logic/clock distribution module, crystal oscillator A, interface module, interface, memory A, memory B, debugging interface, interface socket, running LED and reset circuit; The integrated communicaton processor links to each other with interface module, memory A, memory B, interface socket, bus driver/control logic/clock distribution module, speech processing module, debugging interface, reset circuit, running LED, interface respectively; Wherein interface module links to each other with crystal oscillator A and interface socket; Bus driver/control logic/clock distribution module links to each other with crystal oscillator B, crystal oscillator C and interface socket, and speech processing module links to each other with interface socket.

The characteristics of the utility model are can not only accomplish G.729 voice are carried out (speech coding standard) codec functions; And satisfy of the requirement of VOIP gateway to encoding and decoding speech; Can be applied in the various VOIP system, can accomplish the constructing communication network function that merge in 16 road user speech coding, exchange and 16 tunnel meeting-place simultaneously.

Description of drawings

Fig. 1 is the hardware composition frame chart of the utility model.

Fig. 2 is the software level and the module frame figure of the utility model.

Fig. 3 is a kind of network connection layout of the utility model.

Fig. 4 is the another kind of network connection layout of the utility model.

Embodiment

Combine accompanying drawing that the utility model is described further at present; Referring to Fig. 1 and Fig. 2; The embedded speech switching system; Software uses vxworks operating system and standard VOIP gateway protocol; Hardware comprises integrated communicaton processor 8, speech processing module 7, bus driver/control logic/clock distribution module 6, crystal oscillator A4, interface module 1, interface 12, memory A2, memory B3, debugging interface 9, interface socket 5, running LED 11 and reset circuit 10; Integrated communicaton processor 8 links to each other with interface module 1, memory A2, memory B3, interface socket 5, bus driver/control logic/clock distribution module 6, speech processing module 7, debugging interface 9, reset circuit 10, running LED 11, interface 12 respectively; Wherein interface module 1 links to each other with crystal oscillator A4 and interface socket 5; Bus driver/control logic/clock distribution module 6 links to each other with crystal oscillator B13, crystal oscillator C14 and interface socket 5, and speech processing module 7 links to each other with interface socket 5.

Embodiment:

Integrated communicaton processor 8 is selected XPC860TCZQ66D4 for use; Memory B3 selects HY57V561620CT-H for use; Memory A2 selects TE28F320C3BD70 for use, and integrated communicaton processor 8 links to each other with memory B3, memory A2 respectively and forms the core processing module of whole speech exchange system.

Interface module 1 comprises 10/100Mbps Ethernet PHY transceiver LX971ALE and 10/100M Ethernet interface isolation transformer HX1148, and the transmitting-receiving of Ethernet data is accomplished in its MII mouth interconnection direct and integrated communicaton processor 8.

Speech processing module 7 refers to dsp chip TMS320VI5416PGE.Speech processing module 7 interconnects through HPI mouth and integrated communicaton processor 8, and interconnects through interface socket 5 between each user speech passage.The pcm stream that it sends each subscriber channel here becomes parallel data through encoding and decoding conversion G.729 and carries out giving integrated processor 8 after voice signal compression coding and decoding and the meeting fusion according to the instruction of processor; After handling accordingly, the data that it sends processor here give each subscriber channel.

Bus driver/control logic/clock distribution module 6 mainly is made up of EPM7128AETI100 and 20MHz, 32.768MHz crystal oscillator; The main generation of accomplishing interface logic between integrated communicaton processor 8 and each module, level translation, bus buffer, address decoding, read-write control and for integrated communicaton processor 8, speech processing module 7 provide work clock, also generate simultaneously the TDM interface frame synchronously, bit clock signal supplies each subscriber channel use.

Debugging interface 9 is one ten a core socket, is used for interconnecting with simulator.Simulator carries out hardware diagnostic and debugging and program through this interface to integrated communicaton processor 8 circuit and loads.

Reset circuit 10 is made up of sensitive switch and reset control circuit MAX825REUK-T, carries out the monitoring of integrated communicaton processor 8 electrification resets and hand-reset and integrated communicaton processor 8 power supplys.

Interface 12 is made up of RS-232C interface circuit MAX3232EEAE, and it mainly accomplishes RS-232C level and Transistor-Transistor Logic level conversion, is used for the debugging of integrated communicaton processor 8 and the expansion of interface.

The utility model hardware designs explanation: referring to Fig. 1

1) integrated communicaton processor

Integrated communicaton processor XPC860TCZQ66D4 is a whole system control core, and it carries out the software that solidifies in advance, accomplishes following major function:

The control of interface module;

The transfer of data that control command, DSP speech processing module and data-interface etc. are sent here;

The control of each several part state and detection in the system;

Network communication protocol is handled.

2) Ethernet interface module

The Ethernet interface module comprises 10/100Mbps Ethernet PHY (physical layer) transceiver LX971ALE and 10/100M Ethernet interface isolation transformer HX1148 etc.

The transmitting-receiving of Ethernet data is accomplished in its MII (GMII) mouthful of interconnection direct and the integrated communicaton processor.

3) speech processing module

Speech processing module comprises dsp chip TMS320VI5416PGE and DC/DC power converting circuit TPS77516D etc.

Speech processing module interconnects with the integrated communicaton processor through HPI (hardware platform interface) mouthful, and passes through the interconnection of PCM (pulse-code modulation) interface between each user speech passage.The pcm stream that it sends each subscriber channel here converts parallel data to and carries out giving processor after voice signal compression coding and decoding and the meeting fusion according to the instruction of processor; After handling accordingly, the data that it sends processor here give each subscriber channel.

4) bus driver/control logic/clock distribution module

Bus driver/control logic/clock distribution module mainly is made up of CPLD EPM7128AETI100 and 20MHz, 32.768MHz crystal oscillator etc.; The main generation of accomplishing interface logic between integrated communicaton processor and each module, level translation, bus buffer, address decoding, read-write control and for integrated communicaton processor, dsp chip provide work clock, also generate simultaneously TDM (time division multiplexing) interface frame synchronously, bit clock signal supplies each subscriber channel use.

5) debugging interface

Debugging interface is one 10 core socket, and this interface is mainly used in simulator and interconnects.Simulator can carry out hardware diagnostic and debugging and program to the integrated communicaton processor circuit through this interface and load.

6) reset circuit

Reset circuit is made up of sensitive switch and reset control circuit MAX825REUK-T.It mainly accomplishes the monitoring of integrated communicaton processor electrification reset and hand-reset and integrated communicaton processor power supply.

7) interface

Interface is made up of interface circuit MAX3232EEAE, and it mainly accomplishes RS-232C level and TTL (life span) level translation, is used for the debugging of integrated communicaton processor and the expansion of interface.

8) other

3.3V power supply indicator;

Integrated communicaton processor running LED;

The Ethernet interface working station indicator;

The dsp operation status indicator lamp.

The software system design scheme:

Module frame is as shown in Figure 2, and systems soft ware adopts hierarchically structured design.BSP (plate level support package) program is accomplished the seamless connection of vxworks operating system and hardware platform, and I/O (I/O) operation, DMA (direct memory access) operation, interruption routine and the OS (operating system) of API (API) program package application program call.Application software realizes being divided into 4 functional modules, mainly contains compositions such as network management module, data forwarding module, speech processing module, protocol process module, human-machine interface module.

The responsibility of each functional module is following:

Network management module is got in touch with task by network reconfiguration, the tissue of system parameter table and maintenance task, and the system diagnostics task is formed, and accomplishes the inspection of each node port addressing and node existence.

Speech processing module is made up of port process control task, voice transmission task, reception task.Different port is used different process task.Voice send task, reception task, accomplish the compression coding and decoding data synchronization processing of voice.

Data forwarding module is made up of LAN (local area network (LAN)) interface transmitting-receiving and control task, Data Receiving task and transmission task, accomplishes the grouping and the transmitting-receiving of asynchronous and synchrodata and handles.

Human-machine interface module is by transmitting message task, and demonstration task and other interrupt handling routine are formed.

1) network management module interface

Network management module is by the network contact task, the system parameter table maintenance task, and the system parameter table distributed tasks, system parameter table is preserved task, and the system testing task is formed, and accomplishes the inspection of each node traffic port addressing and node existence.

System parameter table is preserved all system parameterss, these system parameterss of network management module maintenance management, and other module can only be checked system parameter table and can not be revised.

Network management module receives the system parameters that human-machine interface module is provided with, and informs that speech processing module and data forwarding module system parameters change.

Network management module gives information and uses when pipeline supplies human-machine interface module that parameter is set, and is different according to the data content of issuing the message pipeline, and different parameters is set.

After system parameter table changed, the message pipeline that message pipeline that network management module provides through speech processing module and data forwarding module provide was informed speech processing module or data forwarding module.

2) speech processing module interface

The system parameter table that speech processing module is sent here according to network management module; Operation corresponding ports task; The port task is delivered to the voice of the port on the net, receives the call command of being sent here by human-machine interface module, handles call command and the result is informed human-machine interface module.

The speech processing module pipeline that gives information receives the message of sending from network management module and human-machine interface module.When talking state changed, speech processing module was notified human-machine interface module through the human-machine interface module pipeline that gives information with current state.

3) data forwarding module interface

The system parameter table that data forwarding module is sent here according to network management module; Move corresponding FPDP task; The data that the FPDP task is received port (serial ports or network interface) are delivered on the net, give corresponding ports (serial ports or network interface) with the data that the bus transceiver module is sent here.

The data forwarding module pipeline that gives information receives the message of sending from network management module.Network management module can send baud rate and change message.

Agreement between data forwarding module and its port (serial ports or network interface) is not limit and is adopted which kind of concrete form, is the transparent channel transmission.

4) human-machine interface module interface

Human-machine interface module converts user's button to corresponding message and issues network management module or speech processing module, receives the message that speech processing module sends here and shows corresponding screen prompt information.

The human-machine interface module pipeline that gives information receives the message of sending from speech processing module.

Human-machine interface module through the interface that network management module and speech processing module provide, is informed network management module or speech processing module after converting user's button to corresponding message.

1. actual application scheme

1) the integrated communicaton processor is applied to the VOIP system, a kind of internetwork connection mode as shown in Figure 3.

The integrated communicaton processor is accomplished the G.729 encoding and decoding of voice through DSP; And communicate by letter with MPC860T through HPI; G.729 codec data is delivered to Ethernet by the packing of integrated communicaton processor; Procotol that integrated communicaton processor adopting vxworks operating system is embedded and standard VOIP gateway protocol are linked into the Internet network to internal user, accomplish the conversation with the network user.

2) the MPC860T speech exchange system is formed voice communication system, sees another kind of internetwork connection mode shown in Figure 4.

The MPC860T speech exchange system can accomplish 16 tunnel speech codings and merge in 16 tunnel meeting-place, form a small-sized network voice communication system through Ethernet switch, but maximum access node number is 16.Each intra-node can meet 16 users through the business board extended user interface, and this user can carry out INCOM intercom, also can accomplish user's voice communication between node through network.The communication of its networking topology is applicable to the application of stackable formula communication network and the group-net communication simulation between the command system vehicle between building, unit, training etc.

Can find out through above instance; Characteristics such as embedded MPC860T speech exchange system relies on that volume is little, rich interface, perfect in shape and function, use are flexible; Can be applied in widely in the various voice group network communication systems; Through embedding business board is that communication system provides a large amount of user interfaces, can accomplish exchange of speech, meeting-place fusion and VOIP voice access function simultaneously, and application prospect is very extensive.

Speech exchange system is as high integration, high reliability, VOIP access scheme cheaply, for the client provides 16 tunnel local speech access functions, and selective call, meeting be provided, exhale by force, speech business such as monitoring.

Claims

1. go into the formula speech exchange system; Hardware comprises integrated communicaton processor (8), speech processing module (7), bus driver/control logic/clock distribution module (6), crystal oscillator A (4), interface module (1), interface (12), memory A (2), memory B (3), debugging interface (9), interface socket (5), running LED (11) and reset circuit (10); It is characterized in that; Integrated communicaton processor (8) links to each other with interface module (1), memory A (2), memory B (3), interface socket (5), bus driver/control logic/clock distribution module (6), speech processing module (7), debugging interface (9), reset circuit (10), running LED (11), interface (12) respectively; Wherein interface module (1) links to each other with crystal oscillator A (4) and interface socket (5); Bus driver/control logic/clock distribution module (6) links to each other with crystal oscillator B (13), crystal oscillator C (14) and interface socket (5), and speech processing module (7) links to each other with interface socket (5).