CN203872247U

CN203872247U - FPGA multipath telephone recording system

Info

Publication number: CN203872247U
Application number: CN201420126962.7U
Authority: CN
Inventors: 章晓春
Original assignee: Wenzhou Polytechnic
Current assignee: Wenzhou Polytechnic
Priority date: 2014-03-13
Filing date: 2014-03-13
Publication date: 2014-10-08
Anticipated expiration: 2024-03-13

Abstract

A FPGA multipath telephone recording system comprises an audio frequency coding and decoding module, a picking and hanging signal acquisition module, a FPGA signal acquisition system, a DSP data processing module, an ARM control module and a recording storage module; the audio frequency coding and decoding module and the picking and hanging signal acquisition module are connected with an input end of the FPGA signal acquisition system; an output end of the FPGA signal acquisition system is respectively connected with the DSP data processing module and the ARM control module; the ARM control module is connected with the recording storage module; the audio frequency coding and decoding module employs an IDT821024chip, and the integrated chip has ADC conversion function and compression function; the picking and hanging signal acquisition module employs a HEF4051 simulation switch and a TLC0820ACDW analog-to-digital conversion chip; the advantages are that remote FTP mode audio frequency data download and data reading directly through a hard disc can be realized; the FPGA multipath telephone recording system is convenient in usage and large in storage capacity.

Description

A kind of FPGA multiplex telephony recording system

Technical field

The utility model relates to telephonograph, is specifically related to a kind of FPGA multiplex telephony recording system.

Background technology

Both at home and abroad telephonograph product is broadly divided into two kinds of telephonograph card and telephone recording boxes in the market.Telephonograph card is to insert computer main board with the form of board to be connected with main frame, the recording of this form need to be prepared a special computer and is used for installing sound recorded book, most sound recorded book is PCI slot form, not only expensive, and being subject to the restriction of computer slot quantity, address and interrupt resources, extensibility is poor.Telephone recording box is generally external equipment, directly accesses computer external interface by interface line, easy to use, but there is no built-in hard disk storage recording, needs special recording server to store recording data.

Utility model content

The purpose of this utility model is to provide a kind of FPGA multiplex telephony recording system, has the long-range FTP mode of support and downloads voice data and directly pass through hard disk reading out data, easy to use, the advantage that memory capacity is large.

The technical scheme that the utility model relates to:

A kind of FPGA multiplex telephony recording system, formed by audio coding decoding module, dislodging machine signal acquisition module, FPGA signal acquiring system, DSP data processing module, ARM control module and recording memory module, described audio coding decoding module, dislodging machine signal acquisition module are connected with FPGA signal acquiring system input, FPGA signal acquiring system output is connected with DSP data processing module, ARM control module respectively, and ARM control module connects with recording memory module and is connected.

Described telephone wires signals divides simulated audio signal and simulation to pluck on-hook signal.

Described audio coding decoding module adopts IDT821024 chip, and this integrated chip is with ADC translation function and compression function.

Described dislodging machine signal acquisition module adopts HEF4051 analog switch and TLC0820ACDW modulus conversion chip.

The groundwork of described FPGA signal acquiring system is to the audio signal of telephone wire and plucks that on-hook signal gathers and preliminary treatment.

Described ARM control module is the kernel control module of system, the recording work of main completion system.

Described DSP data processing module completes detection and the processing of DTMF and fsk signal and busy-back signal.

Described recording storage module adopts 320G hard disk to store recording file.

The utility model has the advantages that: support long-range FTP mode download voice data and directly pass through hard disk reading out data, easy to use, memory capacity is large.

Brief description of the drawings

Fig. 1 is system control schematic diagram of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Described audio coding decoding module adopts IDT821024 chip, and this integrated chip is with ADC translation function and compression function.Simulated audio signal carries out analog-to-digital conversion compression by IDT821024 chip, and each IDT821024 chip is processed 4 road simulated audio signals, and 64 tunnels need 16 chip blocks, and sample frequency is 8000HZ, and each sampled signal is compiled 8 bit codes, Gong64 road signal.

Described dislodging machine signal acquisition module adopts HEF4051 analog switch and TLC0820ACDW modulus conversion chip.Plucking on-hook signal amplifies by LM324,64 tunnels are plucked under the control of chip selection signal that on-hook signal sends at FPGA and address signal and are plucked on-hook signal through a certain road of HEF4051 analog switch gating, under the control signal effect of sending at FPGA again, complete analog-to-digital conversion by TLC0820ACDW chip, become the digital signal of 8, gathered with the speed of 4K by FPGA.

The groundwork of described FPGA signal acquiring system is to the audio signal of telephone wire and plucks that on-hook signal gathers and preliminary treatment.In described FPGA, PCM and time-sequence control module produce clock signal and the frame synchronizing signal of 4M.Under the control of these two signals, pcm stream sends respectively FPGA to, ARM and DSP.

Described HPI interface module and SPI interface module complete the transmission conversion of message data.ARM all need to complete to ARM transfer information data to DSP transmission reading order and DSP under the assistance of two interface modules.

Claims

1. a FPGA multiplex telephony recording system, formed by audio coding decoding module, dislodging machine signal acquisition module, FPGA signal acquiring system, DSP data processing module, ARM control module and recording memory module, it is characterized in that: described audio coding decoding module, dislodging machine signal acquisition module are connected with FPGA signal acquiring system input, FPGA signal acquiring system output is connected with DSP data processing module, ARM control module respectively, and ARM control module connects with recording memory module and is connected, described telephone wires signals divides simulated audio signal and simulation to pluck on-hook signal, described audio coding decoding module adopts IDT821024 chip, described dislodging machine signal acquisition module adopts HEF4051 analog switch and TLC0820ACDW modulus conversion chip, described FPGA signal acquiring system is mainly to audio signal with pluck that on-hook signal gathers and preliminary treatment, the recording work of the main completion system of described ARM control module, described DSP data processing module completes detection and the processing of DTMF and fsk signal and busy-back signal, described recording storage module adopts 320G hard disk to store recording file.