CN103714819A - Multifunctional speech encoding and decoding conversion device - Google Patents
Multifunctional speech encoding and decoding conversion device Download PDFInfo
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- CN103714819A CN103714819A CN201310578683.4A CN201310578683A CN103714819A CN 103714819 A CN103714819 A CN 103714819A CN 201310578683 A CN201310578683 A CN 201310578683A CN 103714819 A CN103714819 A CN 103714819A
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Abstract
The invention relates to a multifunctional speech encoding and decoding conversion device which comprises a control unit, an AMBE/PCM conversion unit, a DSP processing unit, a network interface, an A/D conversion unit, an audio interface and a power supply unit. The AMBE/PCM conversion unit, the DSP processing unit and the network interface are connected with the control unit. The DSP processing unit is connected with the audio interface through the A/D conversion unit. The power supply unit is respectively connected with the control unit, the AMBE/PCM conversion unit, the DSP processing unit, the A/D conversion unit and the audio interface. The control unit acquires audio stream from the network interface, determines the type of the audio stream, and sends the audio stream to the AMBE/PCM conversion unit or the DSP processing unit according to the type. The converted audio stream is output through the DSP processing unit, the A/D conversion unit and the audio interface in turn. Compared with the prior art, the device provided by the invention has the advantages that mutual conversion between multiple audio formats is realized and the like.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of multifunction speech encoding and decoding conversion device.
Background technology
In field of multimedia communication, comprise that the audio frequency of voice, especially wideband audio become one of main communication service gradually.Current voice transcoder only has independent voice coding translation function conventionally, as changed between AMBE and PCM or G.729 and between PCM changing, do not consider under some special occasions, require can to support simultaneously AMBE with G.729 between conversion and G.729 and change between audio frequency four lines and carry out voice coding modes, start and stop control by network interface between conversion, AMBE and audio frequency four lines.Existing voice transcoder cannot meet the function that several voice codings change simultaneously and the function of controlling by network interface.
Summary of the invention
Object of the present invention is exactly to provide a kind of multifunction speech encoding and decoding conversion device of mutually changing between Multi-audio-frequency form of realizing in order to overcome the defect of above-mentioned prior art existence.
Object of the present invention can be achieved through the following technical solutions:
A kind of multifunction speech encoding and decoding conversion device, comprise control module, AMBE/PCM converting unit, DSP processing unit, network interface, A/D converting unit, audio interface and power supply unit, described AMBE/PCM converting unit, DSP processing unit and network interface are all connected with control module, described DSP processing unit is connected with audio interface through A/D converting unit, and described power supply unit is connection control unit, AMBE/PCM converting unit, DSP processing unit, A/D converting unit and audio interface respectively;
Control module obtains audio stream from network interface, the type of judgement audio stream, and according to type, audio stream is sent to AMBE/PCM converting unit or DSP processing unit, audio stream after conversion, successively by DSP processing unit, A/D converting unit and audio interface, converts audio frequency four line signal outputs to.
Described control module is ARM core board.
Described A/D converting unit and audio interface are equipped with two-way.
Described A/D converting unit comprises A/D chip and the discharge circuit being connected.
Described power supply unit comprises direct supply and the power-switching circuit being connected, and described power-switching circuit is connection control unit, AMBE/PCM converting unit, DSP processing unit, A/D converting unit and audio interface respectively.
The type of described audio stream comprises AMBE code stream and code stream G.729.
Described AMBE/PCM converting unit is for the speech conversion of AMBE and PCM.
Described DSP processing unit for G.729 with the speech conversion of PCM.
Described A/D converting unit is for the speech conversion of PCM and analogue audio frequency.
Compared with prior art, the present invention is integrated with multiple voice conversion chip, by control module, judge the type of audio stream and select corresponding process chip to carry out audio coding decoding conversion, realize the mutual conversion between different audio format code streams, efficiently solve the single shortcoming of existing audio coding decoding Elementary Function, and can change fast audio types.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is concrete structure schematic diagram of the present invention;
Fig. 3 is that AMBE coding of the present invention turns data flow schematic diagram G.729A/B;
Fig. 4 is that G.729A/B the present invention encodes and turn the data flow schematic diagram of AMBE;
Fig. 5 is the data flow schematic diagram that AMBE coding of the present invention turns analogue audio frequency;
Fig. 6 is that G.729A/B the present invention encodes and turn the data flow schematic diagram of analogue audio frequency.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment be take technical solution of the present invention and is implemented as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As Figure 1-Figure 2, a multifunction speech encoding and decoding conversion device, comprises control module 1, AMBE/PCM converting unit 3, DSP processing unit 2, network interface (Ethernet interface) 4, A/D converting unit, audio interface (EM4 line interface) and power supply unit 5.AMBE/PCM converting unit 3, DSP processing unit 2 and network interface 4 are all connected with control module 1, DSP processing unit 2 is connected with audio interface through A/D converting unit, and power supply unit 5 is connection control unit 1, AMBE/PCM converting unit 3, DSP processing unit 2, A/D converting unit and audio interface respectively.
A/D converting unit comprises A/D chip and the discharge circuit being connected.A/D converting unit is provided with two-way, comprise an A/D converting unit 6 and the 2nd A/D converting unit 7, audio interface is also provided with two-way, comprise the first audio interface 8 and the second audio interface 9, the first audio interface 8 is connected with an A/D converting unit 6, and the second audio interface 9 is connected with the 2nd A/D converting unit 7.
Mutual conversion between the audio code stream of A, AMBE form and PCM and analogue audio frequency;
B, the G.729 audio code stream of form and the mutual conversion between PCM and analogue audio frequency;
Mutual conversion between the audio code stream of the audio code stream of C, AMBE form and G.729 form;
D, can realize above-mentioned A and B, A and C, B and the encoding and decoding simultaneously of two kinds of forms of C.
Below introduce the principle of work of different audio coding decoding forms:
One, AMBE and G.729A/B code conversion
1) G.729A/B AMBE is converted to
In Fig. 2, ARM core board receives the signaling of the AMBE coded system of sending from central control host by Ethernet interface, ARM core board decides and is converted to G.729A/B coding or analogue audio frequency according to signaling, when signaling request is converted to while G.729A/B encoding, ARM core board sends to AMBE3003 speech chip by UART serial ports or parallel port (reserving) by AMBE voice coding, the action of decoding of AMBE3003 speech chip, by speech conversion, be that 16 bit linear PCM data stream return to ARM core board, ARM core board sends to DSP TMS320C5509 chip by PCM data stream by HPI parallel port again, ARM core board is issued DSP by control command simultaneously, allow DSP carry out PCM and turn coding work G.729A/B, after dsp code, by HPI interface, return ARM core board, by ARM core board, the G.729A/B coding after conversion is returned to central control unit main frame by Ethernet interface again, concrete data flow as shown in Figure 3.
2) be G.729A/B converted to AMBE
This process is that AMBE is converted to inverse process G.729A/B.Coded conversion device ARM core board receives the signaling of the G.729A/B coded system of sending from central control unit main frame by Ethernet interface, ARM core board decides and is converted to AMBE coding or analogue audio frequency according to signaling, when signaling request is converted to AMBE coding, G.729A/B, ARM core board will be encoded and be issued DSP TMS320C5509 chip by HPI parallel port, and concurrent control command allows it be converted to 16 bit linear pcm encoders and returns to CPU afterwards.ARM core board is issued AMBE3003 chip by UART serial ports or parallel port (reserving) by data stream after receiving PCM data stream, AMBE3003 chip is AMBE voice coding by PCM data stream encoding, return to ARM core board, ARM core board returns to central control unit main frame by AMBE voice coding by Ethernet interface more again.Concrete data flow as shown in Figure 4.
Two, AMBE and analogue audio frequency conversion
1) AMBE turns analogue audio frequency
In Fig. 2, coded conversion device ARM core board receives the signaling of the AMBE coded system of sending from central control unit main frame by Ethernet interface, and ARM core board determines to be converted to analogue audio frequency according to signaling.ARM core board sends to AMBE3003 speech chip by UART serial ports or parallel port (reserving) by AMBE voice coding, the action of decoding of AMBE3003 speech chip, by speech conversion, be to return to ARM core board after 16 bit linear PCM data stream, ARM core board sends to DSP TMS320C5509 chip by PCM data stream by HPI parallel port again, ARM core board is issued DSP by control command simultaneously, allows DSP directly by McBSP serial ports, send to A/D chip to be converted to analog voice PCM data stream and sends to loudspeaker to release from EM4 line.Its concrete data flow as shown in Figure 5.
2) analogue audio frequency turns AMBE coding
As shown in Figure 4, analogue audio frequency turns the inverse process that AMBE is encoded to said process, no longer describes in detail.
Three, G.729A/B change with analogue audio frequency
1) G.729A/B turn analogue audio frequency
Coded conversion device ARM core board receives the signaling of the G.729A/B coded system of sending from central control unit main frame by Ethernet interface, CPU determines to be converted to analogue audio frequency according to signaling.G.729A/B, ARM core board will be encoded and be issued DSP TMS320C5509 chip by HPI parallel port, concurrent control command allows it carry out decoding work and is converted to pcm encoder stream, directly send to PCM A/D chip 2, by A/D chip 2, PCM data stream is converted to analogue audio frequency output loudspeaker simultaneously.Concrete data flow as shown in Figure 6.
2) G.729A/B analogue audio frequency turns
G.729A/B, it is the inverse process of said process that analogue audio frequency turns, and no longer describes in detail.
Claims (9)
1. a multifunction speech encoding and decoding conversion device, it is characterized in that, comprise control module, AMBE/PCM converting unit, DSP processing unit, network interface, A/D converting unit, audio interface and power supply unit, described AMBE/PCM converting unit, DSP processing unit and network interface are all connected with control module, described DSP processing unit is connected with audio interface through A/D converting unit, and described power supply unit is connection control unit, AMBE/PCM converting unit, DSP processing unit, A/D converting unit and audio interface respectively;
Control module obtains audio stream from network interface, the type of judgement audio stream, and according to type, audio stream is sent to AMBE/PCM converting unit or DSP processing unit, audio stream after conversion, successively by DSP processing unit, A/D converting unit and audio interface, converts audio frequency four line signal outputs to.
2. a kind of multifunction speech encoding and decoding conversion device according to claim 1, is characterized in that, described control module is ARM core board.
3. a kind of multifunction speech encoding and decoding conversion device according to claim 1, is characterized in that, described A/D converting unit and audio interface are equipped with two-way.
4. according to a kind of multifunction speech encoding and decoding conversion device described in claim 1 or 3, it is characterized in that, described A/D converting unit comprises A/D chip and the discharge circuit being connected.
5. a kind of multifunction speech encoding and decoding conversion device according to claim 1, it is characterized in that, described power supply unit comprises direct supply and the power-switching circuit being connected, and described power-switching circuit is connection control unit, AMBE/PCM converting unit, DSP processing unit, A/D converting unit and audio interface respectively.
6. a kind of multifunction speech encoding and decoding conversion device according to claim 1, is characterized in that, the type of described audio stream comprises AMBE code stream and code stream G.729.
7. a kind of multifunction speech encoding and decoding conversion device according to claim 1, is characterized in that, described AMBE/PCM converting unit is for the speech conversion of AMBE and PCM.
8. a kind of multifunction speech encoding and decoding conversion device according to claim 1, is characterized in that, described DSP processing unit for G.729 with the speech conversion of PCM.
9. a kind of multifunction speech encoding and decoding conversion device according to claim 1, is characterized in that, described A/D converting unit is for the speech conversion of PCM and analogue audio frequency.
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