CN103684624B - Satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing - Google Patents
Satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing Download PDFInfo
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- CN103684624B CN103684624B CN201210329105.2A CN201210329105A CN103684624B CN 103684624 B CN103684624 B CN 103684624B CN 201210329105 A CN201210329105 A CN 201210329105A CN 103684624 B CN103684624 B CN 103684624B
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Abstract
The invention discloses a kind of satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing, comprise step: make PCM3500 and AMBE2000 enter normal mode of operation; 2KHz signal is inputted to PCM3500; AMBE2000 is set and is only in encoder modes, check the output encoder form of AMBE2000, the output valve of record AMBE2000; AMBE2000 is set and is only in decoder mode, check the output encoder form of AMBE2000; By the data of record input AMBE2000; Whether output signal is 2KHz signal, and if it is AMBE2000 half-duplex voice output function is normal.The inventive method ensure that audio coder & decoder (codec) has good half-duplex voice output function, provides guarantee for satellite mobile communication terminal has good data transmission performance.
Description
Technical field
The present invention relates to satellite communication field, particularly one is based on the satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing of " Big Dipper ".
Background technology
The low frequency part of digital radio system adopts digital circuit, and compared with conventional wireless electric system, A/D, D/A conversion of software radio system has moved on to intermediate frequency, and as far as possible near radio-frequency head.Software radio replaces special digital circuit with FPGA, DSP device that power able to programme is strong, makes system hardware structure and function opposite independent.Field programmable gate array FPGA advanced technology part is that compact footprint can high speed processing, also keeps flexibility and the programmability of software and radio technique simultaneously.Reconfigurable core can be realized from FPGA, can modulator be realized in FPGA, demodulator and CODEC function.FPGA to signal transacting engine, becomes FET, FIR from logical design platform development flexibly, the ideal platform of numeral lower multifrequency device DDC, digital up converter DUC, correlator and pulse compression (for radar process) computing.
AMBE encoding and decoding technique is a kind of low bit rate speech coding technology with high voice quality and strong robustness.AMBE2000 adopts AMBE encoding and decoding technique, is the monolithic real-time voice Compress softwares chip of a kind of high-performance, low-power consumption, achieves data and the voice simultaneous interpretation of low bandwidth, duplex, voice communication naturally, can understand.
As shown in Figure 1, a kind of satellite mobile communication terminal based on " Big Dipper ", comprises fpga chip XC5VLX50T, dsp chip TMS320C6455, audio coder & decoder (codec) chip AMBE2000 and PCM3500; Described fpga chip XC5VLX50T is connected with AMBE2000 by control interface; Described XC5VLX50T is connected with TMS320C6455 by EMIFA interface, HPI interface; XC5VLX50T is connected with PCM3500 by programmable interface.
The advantage of FPGA and the advantage of AMBE2000 should to be combined based on the satellite mobile communication terminal of " Big Dipper " applies in satellite mobile communication terminal, will bring the voice quality of high-quality and good real-time for mobile communication.But should require very high to data transmission performance between XC5VLX50T and AMBE2000 based on the satellite mobile communication terminal of " Big Dipper ", whether its functional parameter of prior checking reaches designing requirement seems extremely important, such as, verify the half-duplex voice input of AMBE2000, output function characteristic.
Summary of the invention
The object of the present invention is to provide a kind of half-duplex voice output function method of testing based on the satellite mobile terminal audio coder & decoder (codec) of " Big Dipper ".
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing, described satellite mobile terminal is the satellite mobile communication terminal based on " Big Dipper ", and institute's speech codec is chip AMBE2000, and the method comprising the steps of:
Step 1: whether the connection detecting FPGA and PCM3500 in satellite mobile terminal is normal, if connect normal, enter step: 2, otherwise change PCM3500, the connection re-starting FPGA and PCM3500 detects, until FPGA and PCM3500 connects normal, described PCM3500 is the analog to digital converter be connected with AMBE2000;
Step 2: whether the connection detecting FPGA and AMBE2000 in satellite mobile terminal is normal, if connect normal, enters step 3, otherwise changes AMBE2000, and the connection re-starting FPGA and AMBE2000 detects, until FPGA and AMBE2000 connects normal;
Step 3: detect FPGA whether normal to the signaling controlling functions of AMBE2000, if normal, enter step 4, otherwise change AMBE2000, return step 2;
Step 4: whether normally detect the self-closing ring function of PCM3500, if normally, enter step 5, otherwise replacing PCM3500, whether the connection again detecting FPGA and PCM3500 is normal, connects normally and carries out the self-closing ring function detection of PCM3500 again;
Step 5: whether normally detect AMBE2000 half-duplex voice input function, if normal, enter step 6, otherwise change AMBE2000, whether the connection again detecting FPGA and AMBE2000 is normal, carries out FPGA again and detect the signaling controlling functions of AMBE2000 after FPGA and AMBE2000 connection is normal;
Step 6: carry out AMBE2000 half-duplex voice output function and detect, specifically:
1) the external input of enable PCM3500, makes PCM3500 enter normal mode of operation;
2) the external input of enable AMBE2000, makes AMBE2000 enter normal mode of operation;
3) by the input input 2KHz signal of signal generator to PCM3500;
4) internal register of AMBE2000 is set by FPGA, makes it only be in encoder modes;
5) checked the output encoder form of AMBE2000 by FPGA, coded format correctly then enters step 6), otherwise changes AMBE2000;
6) output valve of AMBE2000 is recorded by FPGA;
7) internal register of AMBE2000 is set by FPGA, makes it only be in decoder mode;
8) checked the output encoder form of AMBE2000 by FPGA, coded format correctly then enters step 9), otherwise changes AMBE2000;
9) data recorded in step 6) are input to AMBE2000 by FPGA;
10) check whether be 2KHz signal, if it is AMBE2000 half-duplex voice output function is normal if outputing signal in oscilloscope, otherwise AMBE2000 half-duplex voice output function is abnormal.
Wherein, detect FPGA and PCM3500 in satellite mobile terminal in described step 1 and connect whether normally comprise step:
1) register of PCM3500 inside is set by FPGA;
2) read back by FPGA the register of PCM3500 inside, checks that the register of the PCM3500 inside of reading back arranges and establishes value whether consistent in step 1), if consistent, normally, otherwise PCM3500 breaks down in FPGA and PCM3500 connection.
Wherein, detect FPGA and AMBE2000 in satellite mobile terminal in described step 2 and connect whether normally comprise step:
1) register of AMBE2000 inside is set by FPGA;
2) read back by FPGA the register of AMBE2000 inside, checks that the register of the AMBE2000 inside of reading back arranges and establishes value whether consistent in step 1), if consistent, normally, otherwise AMBE2000 breaks down in FPGA and AMBE2000 connection.
Wherein, detect the signaling controlling functions of FPGA to AMBE2000 in described step 3 and whether normally comprise step:
1) register of AMBE2000 inside is set by FPGA, adjusts the structure of its coding;
2) received the speech coding of AMBE2000 by FPGA, check that whether the structure of the coding received is consistent with the coding structure arranged in step 1), if consistent, FPGA is normal to the signaling controlling functions of AMBE2000, otherwise AMBE2000 breaks down.
Wherein, detect the self-closing ring function of PCM3500 in described step 4 and whether normally comprise step:
1) the external input of enable PCM3500, makes PCM3500 enter from closed loop mode;
2) signal generator is to the input input 2KHz signal of PCM3500;
3) oscilloscope connects the output of PCM3500, and check whether the signal shown in oscilloscope is 2KHz signal, if it is the self-closing ring function of PCM3500 is normal, otherwise PCM3500 breaks down.
Wherein, detect AMBE2000 half-duplex voice input function in described step 5 and whether normally comprise step:
1) the external input of enable PCM3500, makes PCM3500 enter normal mode of operation;
2) the external input of enable AMBE2000, makes AMBE2000 enter normal mode of operation;
3) input of PCM3500 is connected with signal generator, by the input input 2KHz signal of signal generator to PCM3500;
4) output of PCM3500 is connected with oscilloscope, and whether be 2KHz signal by oscilloscope inspection output signal, if it is AMBE2000 half-duplex voice input function is normal, otherwise AMBE2000 half-duplex voice input function is abnormal.
compared with prior art, beneficial effect of the present invention: satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing of the present invention, whether the audio coder & decoder (codec) half-duplex voice output function well testing satellite mobile communication terminal is normal, ensure that the audio coder & decoder (codec) of satellite mobile communication terminal has good half-duplex voice input, output function, and then provide guarantee for there is between FPGA and audio coder & decoder (codec) good data transmission performance in satellite mobile communication terminal, meet the requirement of the satellite mobile communication terminal based on " Big Dipper ".
Accompanying drawing illustrates:
Fig. 1 is the satellite mobile communication terminal structural representation of tested object of the present invention based on " Big Dipper ".
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
AMBE encoding and decoding speech technology is a kind of low bit rate speech coding technology with high voice quality and strong robustness.This method presses each harmonic frequency of fundamental tone in a frequency domain, is multiple frequency band by the spectrum division of frame voice, does clear, voiced sound judgement to each frequency band.To voiced sound band, be that the pulse train in cycle is as pumping signal with fundamental tone; To resonance area, then using white noise as pumping signal; Total pumping signal is added by each band pumping signal and forms.With this excitation signal energizes vocal tract filter, finally synthesize the voice with higher naturalness.Therefore in low bit-rate scenarios, the tonequality of its synthetic speech still can keep higher naturalness.Its AMBE algorithm improved becomes the speech coding standard of IMSO and mobile satellite communication.
Phonetic codec chip AMBE2000 adopts AMBE encoding and decoding technique; it is the monolithic real-time voice Compress softwares chip of a kind of high-performance, low-power consumption; its compression ratio can by hardware, software adjustment within the scope of 2kbit/s ~ 9.6kbit/s; when speed is at more than 4.0kbit/s, the speech quality close to toll telephone can be obtained; When speed is 2.0kbit/s, still there is higher intelligibility and naturalness.Phonetic codec chip AMBE2000 has FEC (forward error correction), VAD (voice activation detection) function and dtmf signal measuring ability, achieves data and the voice simultaneous interpretation of low bandwidth, duplex, voice communication naturally, can understand.
With reference to figure 1, a kind of satellite mobile communication terminal structural representation based on " Big Dipper ".Based on the above-mentioned advantage of phonetic codec chip AMBE2000, compress speech, the decompressing function of AMBE2000 should be have employed based on the satellite mobile communication terminal of " Big Dipper ", realized the voice communication of high voice quality, high real-time.Fpga chip XC5VLX50T, dsp chip TMS320C6455, audio coder & decoder (codec) chip AMBE2000 and analog to digital converter chip PCM3500 should be comprised based on the satellite mobile communication terminal of " Big Dipper "; Described fpga chip XC5VLX50T is provided with the analogue enlargement interface corresponding with AMBE2000 control interface by programmable interface programming, and the analogue enlargement interface of XC5VLX50T is connected with AMBE2000 control interface; Described XC5VLX50T is provided with the simulation EMIFA interface corresponding with dsp chip TMS320C6455 EMIFA interface, the simulation HPI interface corresponding with TMS320C6455 HPI interface by programmable interface programming, the simulation EMIFA interface of XC5VLX50T is connected with TMS320C6455 EMIFA interface, and the simulation HPI interface of XC5VLX50T is connected with TMS320C6455HPI interface; XC5VLX50T arranges speech parameter and the operational mode of PCM3500 chip by programmable interface programming.
Interface between above-mentioned satellite mobile communication terminal XC5VLX50T and the AMBE2000 based on " Big Dipper " is through optimal design, has the feature of data flow and the control overflow met based on the satellite mobile communication terminal of " Big Dipper ".
Satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing of the present invention, for testing based on the half-duplex voice input function of AMBE2000 in the satellite mobile communication terminal of " Big Dipper " shown in Fig. 1, comprises step:
Step 1: whether the connection detecting FPGA and PCM3500 in satellite mobile terminal is normal, and its concrete steps comprise:
1) register of PCM3500 inside is set by FPGA;
2) read back by FPGA the register of PCM3500 inside, checks that the register of the PCM3500 inside of reading back arranges and establishes value whether consistent in step 1), if consistent, normally, otherwise PCM3500 breaks down in FPGA and PCM3500 connection.
If connect normal, enter step 2, otherwise change PCM3500, re-start detection, until FPGA and PCM3500 connects normal.
Step 2: whether the connection detecting FPGA and AMBE2000 in satellite mobile terminal is normal, and its concrete steps comprise:
1) register of AMBE2000 inside is set by FPGA;
2) read back by FPGA the register of AMBE2000 inside, checks that the register of the AMBE2000 inside of reading back arranges and establishes value whether consistent in step 1), if consistent, normally, otherwise AMBE2000 breaks down in FPGA and AMBE2000 connection.
If connect normal, enter step 3, otherwise change AMBE2000, re-start detection, until FPGA and AMBE2000 connects normal.
Step 3: detect FPGA whether normal to the signaling controlling functions of AMBE2000, its step comprises:
1) register of AMBE2000 inside is set by FPGA, adjusts the structure of its coding;
2) received the speech coding of AMBE2000 by FPGA, check that whether the structure of the coding received is consistent with the coding structure arranged in step 1), if consistent, FPGA is normal to the signaling controlling functions of AMBE2000, otherwise AMBE2000 breaks down.
If FPGA to the signaling controlling functions of AMBE2000 normally, enters step 4, otherwise change AMBE2000, return step 2.
Step 4: whether normally detect the self-closing ring function of PCM3500, it comprises step:
1) the external input of enable PCM3500, makes PCM3500 enter from closed loop mode;
2) signal generator is to the input input 2KHz signal of PCM3500;
3) oscilloscope connects the output of PCM3500, and check whether the signal shown in oscilloscope is 2KHz signal, if it is the self-closing ring function of PCM3500 is normal, otherwise PCM3500 breaks down.
If the self-closing ring function of PCM3500 normally, enter step 5, otherwise change PCM3500, and whether the connection again detecting FPGA and PCM3500 is normal, carry out the self-closing ring function of PCM3500 after connection is normal again and detect.
Step 5: whether normally detect AMBE2000 half-duplex voice input function, it comprises step:
1) the external input of enable PCM3500, makes PCM3500 enter normal mode of operation;
2) the external input of enable AMBE2000, makes AMBE2000 enter normal mode of operation;
3) input of PCM3500 is connected with signal generator, by the input input 2KHz signal of signal generator to PCM3500;
4) whether the output of PCM3500 is connected with oscilloscope, be 2KHz signal by oscilloscope inspection output signal, if select AMBE2000 half-duplex voice input function normally, otherwise AMBE2000 half-duplex voice input function is abnormal.
If AMBE2000 half-duplex voice input function normally, enter step 6, otherwise change AMBE2000, whether the connection again detecting FPGA and AMBE2000 is normal, carries out FPGA again and detect the signaling controlling functions of AMBE2000 after FPGA and AMBE2000 connection is normal.
Step 6: carry out AMBE2000 half-duplex voice output function and detect, specifically:
1) the external input of enable PCM3500, makes PCM3500 enter normal mode of operation;
2) the external input of enable AMBE2000, makes AMBE2000 enter normal mode of operation;
3) by the input input 2KHz signal of signal generator to PCM3500;
4) internal register of AMBE2000 is set by FPGA, makes it only be in encoder modes;
5) checked the output encoder form of AMBE2000 by FPGA, coded format correctly then enters step 6), otherwise changes AMBE2000;
6) output valve of AMBE2000 is recorded by FPGA;
7) internal register of AMBE2000 is set by FPGA, makes it only be in decoder mode;
8) checked the output encoder form of AMBE2000 by FPGA, coded format correctly then enters step 9), otherwise changes AMBE2000;
9) data recorded in step 6) are input to AMBE2000 by FPGA;
10) check whether be 2KHz signal, if it is AMBE2000 half-duplex voice output function is normal if outputing signal in oscilloscope, otherwise AMBE2000 half-duplex voice output function is abnormal.
When the input of AMBE2000 half-duplex voice and/or output function exception in satellite mobile communication terminal being detected, change AMBE2000 in time, to ensure that satellite mobile communication terminal has good voice transfer performance.
The audio coder & decoder (codec) half-duplex voice output function method of testing of satellite mobile communication terminal of the present invention has following characteristics: 1) test based on the signal wiring function between the satellite mobile communication terminal fpga chip XC5VLX50T of " Big Dipper " and audio coder & decoder (codec) chip AMBE2000 and analog to digital converter chip PCM3500; 2) the signaling controlling functions that fpga chip XC5VLX50T realizes the call of the satellite mobile communication terminal of Digital Speech Communication is tested; 3) the self-closing ring function of AMBE2000 and PCM3500 is tested; 4) the half-duplex voice input function of audio coder & decoder (codec) chip AMBE2000; 5) the half-duplex voice output function of audio coder & decoder (codec) chip AMBE2000.Simultaneously, the audio coder & decoder (codec) half-duplex voice output function method of testing of satellite mobile communication terminal of the present invention, before carrying out the test of audio coder & decoder (codec) half-duplex voice output function, signal wiring functional test between first carry out FPGA and PCM3500, carry out the self-closing ring function test of PCM3500, effectively ensure that the accuracy that AMBE2000 half-duplex voice output function is tested, avoid the AMBE2000 half-duplex voice output function test caused because PCM3500 breaks down inaccurate.
The audio coder & decoder (codec) half-duplex voice output function method of testing of satellite mobile communication terminal of the present invention well tests the half-duplex voice input/output function of AMBE2000d, guarantee is provided for the Big Dipper mobile communication terminal has good function of voice communication, meet the requirement of the Big Dipper mobile communication terminal well, be use in the satellite mobile communication testing system based on " Big Dipper " first, meet requirement well in actual use.
Claims (5)
1. a satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing, described satellite mobile terminal is the satellite mobile communication terminal based on " Big Dipper ", institute's speech codec is chip AMBE2000, and it is characterized in that, the method comprising the steps of:
Step 1: whether the connection detecting FPGA and PCM3500 in satellite mobile terminal is normal, if connect normal, enter step 2, otherwise change PCM3500, the connection re-starting FPGA and PCM3500 detects, until FPGA and PCM3500 connects normal, described PCM3500 is the analog to digital converter be connected with AMBE2000;
Step 2: whether the connection detecting FPGA and AMBE2000 in satellite mobile terminal is normal, if connect normal, enters step 3, otherwise changes AMBE2000, and the connection re-starting FPGA and AMBE2000 detects, until FPGA and AMBE2000 connects normal;
Step 3: detect FPGA whether normal to the signaling controlling functions of AMBE2000, if normal, enter step 4, otherwise change AMBE2000, return step 2;
Step 4: whether normally detect the self-closing ring function of PCM3500, if normally, enter step 5, otherwise replacing PCM3500, whether the connection again detecting FPGA and PCM3500 is normal, connects normally and carries out the self-closing ring function detection of PCM3500 again;
Step 5: whether normally detect AMBE2000 half-duplex voice input function, comprise step:
1) the external input of enable PCM3500, makes PCM3500 enter normal mode of operation;
2) the external input of enable AMBE2000, makes AMBE2000 enter normal mode of operation;
3) input of PCM3500 is connected with signal generator, by the input input 2KHz signal of signal generator to PCM3500;
4) output of PCM3500 is connected with oscilloscope, and whether be 2KHz signal by oscilloscope inspection output signal, if it is AMBE2000 half-duplex voice input function is normal, otherwise AMBE2000 half-duplex voice input function is abnormal;
If AMBE2000 half-duplex voice input function normally, enter step 6, otherwise change AMBE2000, whether the connection again detecting FPGA and AMBE2000 is normal, carries out FPGA again and detect the signaling controlling functions of AMBE2000 after FPGA and AMBE2000 connection is normal;
Step 6: carry out AMBE2000 half-duplex voice output function and detect, specifically:
1) the external input of enable PCM3500, makes PCM3500 enter normal mode of operation;
2) the external input of enable AMBE2000, makes AMBE2000 enter normal mode of operation;
3) by the input input 2KHz signal of signal generator to PCM3500;
4) internal register of AMBE2000 is set by FPGA, makes it only be in encoder modes;
5) checked the output encoder form of AMBE2000 by FPGA, coded format correctly then enters step 6), otherwise change AMBE2000;
6) output valve of AMBE2000 is recorded by FPGA;
7) internal register of AMBE2000 is set by FPGA, makes it only be in decoder mode;
8) checked the output encoder form of AMBE2000 by FPGA, coded format correctly then enters step 9), otherwise change AMBE2000;
9) by step 6) in record data be input to AMBE2000 by FPGA;
10) check whether be 2KHz signal, if it is AMBE2000 half-duplex voice output function is normal if outputing signal in oscilloscope, otherwise AMBE2000 half-duplex voice output function is abnormal.
2. satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing according to claim 1, is characterized in that, detects FPGA and PCM3500 in satellite mobile terminal and connect whether normally comprise step in described step 1:
1) register of PCM3500 inside is set by FPGA;
2) read back by FPGA the register of PCM3500 inside, checks that the register of the PCM3500 inside of reading back is arranged and step 1) in establish value whether consistent, if consistent, normally, otherwise PCM3500 breaks down in FPGA and PCM3500 connection.
3. satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing according to claim 1, is characterized in that, detects FPGA and AMBE2000 in satellite mobile terminal and connect whether normally comprise step in described step 2:
1) register of AMBE2000 inside is set by FPGA;
2) read back by FPGA the register of AMBE2000 inside, checks that the register of the AMBE2000 inside of reading back is arranged and step 1) in establish value whether consistent, if consistent, normally, otherwise AMBE2000 breaks down in FPGA and AMBE2000 connection.
4. satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing according to claim 1, is characterized in that, detects the signaling controlling functions of FPGA to AMBE2000 and whether normally comprise step in described step 3:
1) register of AMBE2000 inside is set by FPGA, adjusts the structure of its coding;
2) receive the speech coding of AMBE2000 by FPGA, check the structure of the coding received and step 1) in the coding structure that arranges whether consistent, if unanimously, to the signaling controlling functions of AMBE2000 normally, otherwise AMBE2000's FPGA breaks down.
5. satellite mobile terminal audio coder & decoder (codec) half-duplex voice output function method of testing according to claim 1, is characterized in that, detect the self-closing ring function of PCM3500 and whether normally comprise step in described step 4:
1) the external input of enable PCM3500, makes PCM3500 enter from closed loop mode;
2) signal generator is to the input input 2KHz signal of PCM3500;
3) oscilloscope connects the output of PCM3500, and check whether the signal shown in oscilloscope is 2KHz signal, if it is the self-closing ring function of PCM3500 is normal, otherwise PCM3500 breaks down.
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| CN1431637A (en) * | 2003-01-24 | 2003-07-23 | 东南大学 | Communication technology teaching experimental facility and method based on micropower wireless transmission |
| CN1498468A (en) * | 2001-03-16 | 2004-05-19 | ��˹��ŵ�� | Testing loops for channel coder-decoder |
| CN201820444U (en) * | 2010-07-28 | 2011-05-04 | 北京航空航天大学 | Multi-channel voice encoding-decoding equipment |
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| CN1498468A (en) * | 2001-03-16 | 2004-05-19 | ��˹��ŵ�� | Testing loops for channel coder-decoder |
| CN1431637A (en) * | 2003-01-24 | 2003-07-23 | 东南大学 | Communication technology teaching experimental facility and method based on micropower wireless transmission |
| CN201820444U (en) * | 2010-07-28 | 2011-05-04 | 北京航空航天大学 | Multi-channel voice encoding-decoding equipment |
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