Line/Register Signaling (R1/R2 MF) for TMS320C6201
Contents
1. I EAM 2 es cce ren eerte rite er e etes tere eek 2 Compile anad link the SORWOFe 2 Application programmer 4 Create lone Det GU 4 Testing and performance specifications 6 Were te get more Imformeotioti reete nter ee eorr 14 Installation To make the R1 R2 MF software fully functional follow these steps Install the software Compile and link the software Figure 1 Installing and building the R1 R2 MF software RadiSys Corporation Requirements Before you can install this software you need the following e Microsoft Windows 95 or Windows compatible PC platform following software installed on your computer TMS320C6x Code Generation Tools Release 3 01 for Windows 95 or Windows NT Code Composer Studio Tools version 1 2 for Windows 95 or Windows NT e NMAKE utility available from Microsoft PKUNZIP utility Install the software To install the 1 2 MF software 1 Create a directory on the target system For example mkdir c rlr2mf 2 Copy the product files from the CD ROM to the directory you just created Use a copy utility that retains the directory structure such as Compile and link the software To compile and link the2. 2 YES 2 12 1380 l620tone YES 30 1380 l620tone YES R2 Forward 1380 17 1380 1740tone pcm YES Register 40 7 1380 1740tone twl pcm YES Signaling 1380 1740tone 2 YES 3 12 1380 1740tone 5 YES 30 1380 1740tone YES R2 Forward 1380 18 1380 1860tone pcm YES Register 60 7 1380 1860tone twl pcm YES Signaling 7 1380 1860tone 2 YES 4 12 1380 1860tone 5 YES 30 1380 1860tone YES RadiSys Corporation Test Freq Freq SNR Twist SigLev Input Key no Hz Dev dB dB dBm file Detect R2 Forward 1380 19 1380 1980tone pcm YES Register 80 7 1380 1980tone twl pcm YES Signaling 1380 1980tone 2 YES 5 12 1380 1980tone 5 YES 30 1380 1980tone YES R2 Forward 1500 16 1500 1620tone pcm YES Register 20 7 1500 1620tone twl pcm YES Signaling 7 1500 1620tone tw2 pcm YES 6 12 1500_1620tone_snr pcm YES 30 1500 1620tone dnrpcm YES R2 Forward 1500 17 1500 1740tone pcm YES Register 40 7 1500 1740tone twl pcm YES Signaling 1500 1740tone tw2 pcm YES 7 12 1500 1740tone 5 YES 30 1500 1740tone YES R2 Forward 1500 18 1500 1860tone pcm YES Register 60 7 1500 1860tone twl pcm YES Signaling 8 7 1500 1860tone 2 YES 12 1500 1860tone 5 YES 30 1500 1860tone YES R2 Forward 1500 19 1500 1980tone pcm YES Register 80 7
3. of data e A heuristic machine on the results of the spectral analysis e state machine and report results in the prdvar structure Syntax ToneDetMain prdVar PCMBuf pIdCoeff SZ PROC SZ maScale State Parameters prdvar Pointer to prdvar the R1 R2 MF detector state variable structure 32 bit aligned size of r1r2mfStateVar persistent memory The gt element defines the key number pTdCoeff Pointer to R1 R2 MF detector state table structure 16 bit aligned size of r1r2mfTbl shared memory PCMBuf 16 bit linear PCM input data buffer pointer 16 bit aligned 160 bytes 80 samples non persistent memory BUF SZ Number of input samples processing at once Frame size 80 No other size is applicable in this version PROC SZ Spectral Estimator block size 256 No other size is applicable in this version maScale Scratch buffer size of 2 048 bytes 32 bit aligned scratch memory State Detector State short variable Values include 0 R1 1 R2 Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide Key definitions State 0 for gt Key number Key Signal Frequencies RI l for R2 gt representation detected Hz RI Line 0 RIKEYO Line 2600 Register 1 1 1 1100 1700 Register 2 RIKEY2 Digit 1 700 900
4. Register 3 RIKEY3 Digit 2 700 1100 Register 4 RIKEYA Digit 3 900 1100 Register 5 RIKEY5 Digit 4 700 1300 Register 6 RIKEY Digit 5 900 1300 Register 7 RIKEY7 Digit 6 1100 1300 Register 8 RIKEY8 Digit 7 700 1500 Register 9 RIKEY9 Digit 8 900 1500 Register 10 Digit 9 1100 1500 R1 Register 11 RIKEY11 Digit 0 1300 1500 R1 Register 12 RIKEY12 ST 1500 1700 R1 Register 13 R1KEY13 STI 700 1700 Register 14 14 512 900 1700 Register 15 5 513 1300 1700 R2 Register 0 FR2KEYO R2 Register 1 2 Forward 1380 1500 R2 Register 2 FR2KEY2 Forward 1380 1620 R2 Register 3 FR2KEY3 Forward 1500 1620 R2 Register 4 FR2KEY4 Forward 1380 1740 R2 Register 5 FR2KEY5 Forward 1500 1740 R2 Register 6 FR2KEY6 Forward 1620 1740 R2 Register 7 FR2KEY7 Forward 1380 1860 R2 Register 8 FR2KEY8 Forward 1500 1860 R2 Register 9 FR2KEY9 Forward 1620 1860 R2 Register 10 FR2KEY10 Forward 1740 1860 R2 Register 11 FR2KEY1 1 Forward 1380 1980 R2 Register 12 FR2KEY12 Forward 1500 1980 R2 Register 13 FR2KEY13 Forward 1620 1980 R2 Register 14 FR2KEY 14 Forward 1740 1980 R2 Register 15 FR2KEY15 Forward 1860 1980 R2 Register 16 BR2KEYO R2 Register 17 BR2KEY1 Backward 1140 1020 R2 Register 18 BR2KEY2 Backward 1140 900 R2 Register 19 BR2KEY3 Backward 1020 900 R2 Register 20 BR2KEY4 Backward 1140 780 R2 Register 21 BR2KEY5 Backward 1020 780 RadiSys Corporation State 0 for Key number K
5. 1500 1980tone twl pcm YES Signaling 9 7 1500 1980tone 2 YES 12 1500 1980tone 5 YES 30 1500 1980tone YES R2 Forward 1620 17 1620 1740tone pcm YES Register 40 10Hz 1620 1740tone fdp pcm YES Signaling 10Hz 1620_1740tone_fdn pcm YES 10 5 1620 1740tone twl pcm YES 5 1620 1740tone 2 YES 12 1620 1740tone YES 30 1620 1740tone YES R2 Forward 1620 18 1620 1860tone pcm YES Register 60 7 1620 1860tone twl pcm YES Signaling 1620 1860tone 2 YES 11 12 1620 1860tone 5 YES 30 1620 1860tone YES R2 Forward 1620 19 1620 1980tone pcm YES Register 80 7 1620 1980tone twl pcm YES Signaling 7 1620 1980tone 2 YES 12 12 1620 1980tone 5 YES 30 1620 1980tone dnrpcm YES Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide Test Freq Freq SNR Twist SigLev Input Key no Hz dB dB dBm file Detect R2 Forward 1740 18 1740 1860tone pcm YES Register 60 7 1740 1860tone twl pcm YES Signaling 1740 1860tone 2 YES 13 12 1740 1860tone snr pcm YES 30 1740 1860tone dnrpcm YES R2 Forward 1740 19 1740 1980tone pcm YES Register 80 7 1740 1980tone twl pcm YES Signaling 1740 1980tone tw2 pcm YES 14 12 1740_1980tone_snr pcm YES 30 1740 1980tone YES R2 Forward 1860 19 1860 1980tone pcm YES Register 80 10Hz 1860 1980tone fdp pcm YES
6. R1 R2 MF software 1 Open an 5 DOS command prompt window and go to the target directory then go to the c6xsim sub subdirectory 2 If you ve already installed the TI tools you can build the version of the R1 R2 MF by entering this command at the 5 DOS command prompt NMAKE f rlr2bld mak The directory contains test vector file tonefile pcm When the program rlr2c6x out is executed this test vector is executed and the results of the output is in tonefile c x This result should be the same as those in file tonefile pc Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide Directory Code organization When installed the R1 R2 MF software files reside in this directory structure Extension File type Description Wlr2mf Manual release notes This guide in PDF format and release notes r r2mf c6xsim Control source and executable for C6x files rlr2mfc x c is control source file Output files tonefile c x is an output file cmd Linker command files rl r2mfc x cmd file controls object modules linking options and memory maps for the RT R2 MF module lib Library files The rl r2mf lib file includes object modules used to build DSP executables mak Build file The 1 2 file controls the build process pc Includes tonefile pc expected results for tonefile pcm pem Includes tonefile pcm a binary 16
7. Signaling 0 15Hz 2585tone pcm YES 15Hz 2615tone pcm YES 12 2600tone_snr pcm YES 30 2600tone_dnr pcm YES Register 700 700 900tone pcm Signaling 1 900 1 5 700 900tone fdp pcm YES 1 5 700 900tone fdn pcm YES 6 700 900tone twl pcm YES 6 700 900tone tw2 pcm YES 30 700 900tone dnrpcm YES 12 700 900tone snr pcm YES Register 700 700 1100 5 Signaling 2 1100 30 700 1100 YES 12 700 1100 snr pcm YES Register 700 700 1300tone pcm YES Signaling 3 1300 30 700 1300tone YES 12 700 1300tone snr pcm YES Register 700 700 1500tone pcm YES Signaling 4 1500 30 700 1500tone YES 12 700 1500tone snr pcm YES Register 700 700 1700tone pcm YES Signaling 5 1700 30 700 1700tone YES 12 700 1700tone snr pcm YES Register 900 900_1100tone pcm YES Signaling 6 1100 30 900_1100tone_dnr pcm YES 12 900_1100tone_snr pcm YES Register 900 900 1300tone pcm YES Signaling 7 1300 30 900 1300tone dnrpcem YES 12 900 1300tone snr pcm YES Register 900 0 900 1500tone pcm YES Signaling 8 1500 3 900 1500tone 4 YES ie 900 1500tone snr pcm YES Register 900 900 1700tone pcm YES Signaling 9 1700 30 900 1700tone dnrpcm YES 2 900 1700tone snr pcm YES Register 1100 1100 1300tone pcm YES Signaling 1300 1 5 1100_1300tone_fdp pcm YES 10 1 5 1100 1300tone
8. ASK 6000 on page 14 APIs provide the ABCD information bits through which line signalind can be detected by mapping register signaling R1 Register Signaling uses MF in band pulse signaling for the transmission of address information The signaling frequencies used are 700 Hz to 1700 Hz in 200 Hz steps Combinations of two and only two determine the signal R2 signaling The Signaling System R2 is listed by ITU T as a European signaling code It also consists of both line signaling and inter register signaling parts Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide R2 line signaling The R2 line signaling will not be considered here because the R2 signaling will be operated in a digital transmission environment where all line signaling is handled via signaling bit However TASK 6000 provides APIs to detect the signaling bits from digital transmission equipment such as E1 T1 framers see TASK 6000 on page 14 APIs provide the ABCD information bits through which line signaling can be detected by mapping R2 inter register signals Each inter register signal consists of the simultaneous sending of two in band frequencies out of a range of 6 5 or 4 The system uses two different sets of 6 frequencies for the composition of the forward and backward signals Running R1 R2 MF tone detector tests on Texas Instruments evaluation board To run the tone detector tests use the fixed point TMS320C6x program r1r2
9. Signaling 10Hz 1860_1980tone fdn pcm YES 15 5 1860_1980tone_twl pcm YES 5 1860_1980tone_tw2 pcm YES 12 1860_1980tone_snr pcm YES 30 1860 1980tone dnrpcm YES R2 Backward 1140 10 1140 1020tone pcm YES Register 20 10Hz 1140_1020tone YES Signaling 10Hz 1140_1020tone fdn pcm YES 16 5 1140 1020tone twl pcm YES 5 1140_1020tone_tw2 pcm YES 12 1140 1020tone 5 YES 30 1140 1020tone YES R2 Backward 1140 90 1140 900tone pcm YES Register 0 7 1140 900tone twl pcm YES Signaling 1140 900tone tw2 pcm YES 17 12 1140_900tone_snr pcm YES 30 1140_900tone_dnr pcm YES R2 Backward 1140 78 1140_780tone pcm YES Register 0 7 1140 780tone twl pcm YES Signaling 1140 780tone tw2 pcm YES 18 12 1140 780tone snr pcm YES 30 1140 780tone dnr pcm YES R2 Backward 1140 66 1140 660tone pcm YES Register 0 t7 1140 660tone twl pcm YES Signaling 1140 660tone tw2 pcm YES 19 12 1140 660tone snr pcm YES 30 1140 660tone dnr pcm YES R2 Backward 1140 54 1140 540tone pcm YES Register 0 7 1140 540tone twl pcm YES Signaling 1140 540tone tw2 pcm YES 20 12 1140 540tone snr pcm YES 30 1140 1020tone dnrpem YES RadiSys Corporation Test Freq Freq SNR Twist SigLev Input Key no Hz Dev 4 dBm file Detect R2 Backward 1020 90 1020 900tone pcm YES Register 0 7 1020 900tone twl pcm YES Signaling 1020 900tone tw2 pcm YES 21 12 1020 900tone snr pcm YES 30 1020 900ton
10. YES t6 1100 1300tone twl pcm YES 6 1100 1300tone tw2 pcm YES 30 1100 1300tone YES 12 1100 1300tone 5 YES Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide Test Freq Freq SNR Twist SigLev Input Key no Hz Dev dB dB dBm file Detect Register 1100 1100 1500tone pcm YES Signaling 1500 30 1100 1500tone YES 11 12 1100 1500tone 5 YES Register 1100 1100 1700tone pcm YES Signaling 1700 30 1100 1700tone YES 12 12 1100 1700tone YES Register 1300 1300 1500tone pcm YES Signaling 1500 30 1300 1500tone YES 13 12 1300 1500tone 5 YES Register 1300 1300 1700tone pcm YES Signaling 1700 30 1300 1700tone YES 14 12 1300 1700tone snrpcem YES Register 1500 1500 1700tone pcm YES Signaling 1700 1 5 1500_1700tone fdp pcm YES 15 1 5 1500 1700tone fdn pcm YES 6 1500 1700tone twl pcm YES 6 1500_1700tone_tw2 pcm YES 30 1500 1700tone dnrpcm YES 12 1500 1700tone 5 YES R2 Forward 1380 15 1380 1500tone pcm YES Register 00 10Hz 1380 1500tone fdp pcm YES Signaling 10Hz 1380_1500tone fdn pcm YES 1 5 1380 1500tone twl pcm YES 5 1380 1500tone tw2 pcm YES 12 1380 1500tone 5 YES 30 1380 1500tone YES R2 Forward 1380 16 1380 1620 YES Register 20 7 1380 l620tone twl pcm YES Signaling 7 1380 1620
11. bit PCM input file Wl r2mf include h Header files Header files used to build the RT R2 MF Applications can share these files as well 1 This file is tested to work with the Microsoft NMAKE utility and can be modified to work with other make utilities Demo program A demo program r1r2c6x c is included on the CD ROM In the demo program the Data Structures are created for a single channel The CreateToneDet pTdVar function initializes the R1 R2 state variable data structure The ToneDetMain needs to be called once every 10 ms time slot The R1 or R2 key if detected is in the pravar xey element of the state variable structure For multiple channels multiple instances of data structures have to be allocated on a per channel basis The same set of coefficients can be used for all the channels See the demo program for tone detector tables coefficient structure pTdCoeff initialization and API executions RadiSys Corporation Application programmer interface Once you ve installed and built the R1 R2 MF software you can use the R1 R2 functions in your C application code The R1 R2 MF functions accept buffers passed to the module for example no stack variables and no direct access of globals CreateToneDet pTdVar This function Executes the tone detector module configuring appropriate parameters for the detector and initializing variables e Runs A spectral analysis on the new
12. c6x out which can be run using the TI evaluation board along with Code Composer Studio Tools version 1 2 from the c rlr2mf c6xsim directory The input PCM file is expected to be in tonefile pcm and the output tonefile c6x is generated in the same directory The output consists of the Detected Key number int along with a time stamp short Actual Key detected time is equal to 10 ms times the time stamp R1 R2 tone detector initialization Test results R1 R2 MF uses the constants specified in c r1r2mf include r1r2def h which specifies frequencies cadences and tolerance for detection The User has an option to configure the tone detector at run time to detect R1 MF tones by setting the structure variable pVar gt keyState to 0 default Similarly to detect R2 MF tones set the structure variable pVar gt keyState to 1 The tone detector state machine then looks for the user specified tones for detection on R1 R2 MF tone detector the tests have been performed on R1 R2 MF tone detector through the standard file I O using the Texas Instruments c6x emulator It was confirmed that the C6x implementation was a bit exact match of the RadiSys fixed point C simulation The results of these tests are presented in what follows RadiSys Corporation Test Freq Freq SNR Twist SigLev Input Key no Hz Dev 26 dB dBm file Detect RI Line 2600 2600tone pcm YES
13. e dnr pcm YES R2 Backward 1020 1020 780tone pcm YES Register 780 7 1020 780tone twl pcm YES Signaling 7 1020 780tone tw2 pcm YES 22 12 1020 780tone snr pcm YES 30 1020 780tone dnr pcm YES R2 Backward 1020 66 1020 660tone pcm YES Register 0 7 1020 660tone twl pcm YES Signaling 7 1020 660tone tw2 pcm YES 23 12 1020 660tone YES 30 1020 660tone dnr pcm YES R2 Backward 1020 54 1020 540tone pcm YES Register 0 7 1020 540tone twl pcm YES Signaling 7 1020 540tone tw2 pcm YES 24 12 1020 540tone snr pcm YES 30 1020 540tone dnr pcm YES R2 Backward 900 900 780tone pcm YES Register 780 10Hz 900 780tone fdp pcm YES Signaling 10Hz 900 780tone fdn pcm YES 25 5 900 780tone twl pcm YES 5 900 780tone tw2 pcm YES 12 900_780tone_snr pcm YES 30 900 780tone YES R2 Backward 900 900 660tone pcm YES Register 660 7 900 660tone twl pcm YES Signaling 7 900 660tone tw2 pcm YES 26 12 900 660tone snr pcm YES 30 900 660tone YES R2 Backward 900 900 540tone pcm YES Register 540 7 900 540tone twl pcm YES Signaling 7 900 540tone tw2 pcm YES 27 12 900 540tone snr pcm YES 30 900 540tone dnr pcm YES R2 Backward 780 780 540tone pcm YES Register 660 7 780 540tone twl pcm YES Signaling 7 780 540tone tw2 pcm YES 28 12 780 540tone snr pcm YES 30 780 540tone YES 12 Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide Test Freq Freq SNR Twist SigLev Input K
14. erface to digital network interfaces DNI such as E1 T1 and ATM The SP6040 contains up to four TMS320C6201 digital signal processors SP6020 The RadiSys SP6020 5 6020 board features two Texas Instruments TMS320C6201B fixed point DSPs that run at 200 and serve as the main processing engines Each can deliver up to 1600 MIPS of processing power contingent on the available parallelism within the application code The DSPs are used for voice and data processing compression and decompression TASK 6000 TASK 6000 software is a tool set that provides a framework for composing executing and dynamically configuring optimized real time TMS320C62x DSP applications The Voice Gateway Platform available from RadiSys is used as the reference hardware platform Line Register Signaling RT R2 MF for TMS320C6201 Overview Guide For detailed information about TASK 6000 products see the following publications TASK 6000 User s Manual 07 0992 xx TASK 6000 Installation Guide 07 1000 xx TI tools Software tools from Texas Instruments used to build DSP executables For more information about Texas Instruments products enter this URL in your web browser http www ti com dsp RadiSys Corporation 16
15. ey Frequencies RI l for R2 pTdVar gt key representation Signal detected Hz R2 Register 22 BR2KEY6 Backward 900 780 R2 Register 23 BR2KEY7 Backward 1140 660 R2 Register 24 BR2KEY8 Backward 1020 660 R2 Register 25 BR2KEY9 Backward 900 660 R2 Register 26 BR2KEY10 Backward 780 660 R2 Register 27 BR2KEY11 Backward 1140 540 R2 Register 28 BR2KEY12 Backward 1020 540 R2 Register 29 BR2KEY13 Backward 900 540 R2 Register 30 BR2KEY14 Backward 780 540 R2 Register 3 BR2KEY15 Backward 660 540 Testing and performance specifications The TMS320C6x R1 R2 MF implementation must satisfy IUT T specifications by passing all the tests outlined in the ITU T Q 400 to Q 490 for R2 signaling and ITU T Q 31 to Q 331 for R1 signaling These tests are performed using the evaluation board and standard file I O Results should be compared directly against test requirements signaling The Signaling System R1 is used for inter register signaling primarily in North America It consists of two parts line signaling for line and supervisory signals and register signaling for address signals line signaling The R1 lind signaling will not be considered here because the R1 signaling will be operated in a digital transmission environment where all line signaling is handled via signaling bits However TASK 6000 provides APIs to detect the signaling bits from digital transmission equipment such as E1 T1 framers See T
16. ey no Hz Dev dB dB dBm file Detect R2 Backward 780 780 540tone pcm YES Register 540 7 780 540tone twl pcm YES Signaling 780 540tone tw2 pcm YES 29 12 780 540tone snr pcm YES 30 780 540tone dnr pcm YES R2 Backward 660 660 540tone pcm YES Register 540 10 2 660 540tone fdp pcm YES Signaling 10Hz 660_540tone_fdn pcm YES 30 5 660 540tone twl pom YES 5 660 540tone tw2 pcm YES 12 660 540tone snr pcm YES 30 660 540tone dnr pcm YES 5320 implementation processor load tests MCPS measurements for R1 R2 MF tone detector The following table contains MCPS million cycles per second measurements for the current implementation of the R1 R2 MF with hand optimization of most of the routines tone detector Operation Ins Cycles Frame Tone Spotting 444 Block Copy 140 Power Estimation 22 FFT Windowing 209 128 point Complex FFT 1969 Real FFT extraction 552 Computation FFT Magnitude 693 Bit Reversing 271 Key Decoding 1289 CPM State Machine with other Control 120 Total 5908 1 This figure of 5908 instruction cycles per 10 0 msec frame translates to 0 59 MCPS per channel at an 8000 KHz sampling rate Memory measurements for 1 2 MF tone detector implementation of the R1 R2 MF tone detector needs 13 28 Kbytes of program memory and 2 312 Kbytes of data memory Out of 2 312 Kbytes of data memory the variables structure is of 0 728 Kbytes wh
17. ich should be aligned to 32 bit word boundary and tables structure is of 1 584 Kbytes which needs 16 bit alignment In addition to the above data memory it also needs a scratch data memory of 2 048 Kbytes RadiSys Corporation Where to get more information About the Line Register Signaling RT R2 MF for TMS320C6201 You can find out more about the R1 R2 MF from these sources Readme file Lists features and issues that arose too late to include in other documentation World Wide Web RadiSys maintains an active site on the World Wide Web The site contains current information about the company and locations of sales Offices new and existing products contacts for sales service and technical support information You can also send e mail to RadiSys using the web site When sending e mail for technical support please include information about both the hardware and software plus a detailed description of the problem including how to reproduce it To access the RadiSys web site enter this URL in your web browser http www radisys com Requests for sales service and technical support information receive prompt response About related products 14 SP6040 The RadiSys SP6040 SPIRIT 6040 CompactPCIt board is a high performance intelligent subsystem designed for telecom and datacom applications Based on Texas Instruments devices the SP6040 has a 200MHz DSP engine with an connector that provides int
18. www radisys com World Headquarters 5445 NE Dawson Creek Drive Hillsboro OR 97124 USA Phone 503 615 1100 Fax 503 615 1121 Toll Free 800 950 0044 International Headquarters Gebouw Flevopoort Televisieweg 1A NL 1322 AC Almere The Netherlands Phone 31 36 5365595 Fax 31 36 5365620 007 01052 0002 November 2000 Line Register Signaling RT R2 MF for 5320 62011 Overview Guide November 2000 Copyright 02000 by RadiSys Corporation All rights reserved EPC iRMX INtime Inside Advantage and RadiSys are registered trademarks of RadiSys Corporation Spirit DAI DAQ ASM Brahma and SAIB are trademarks of RadiSys Corporation 1 All other trademarks registered trademarks service marks and trade names are the property of their respective owners Line Register Signaling R1 R2 for TMS320C6201 The Line Register Signaling R1 R2 MF for TMS320C6201f performs R1 R2 detection for high capacity trunks It detects only in band audible tones it does not address any tones which may be out of band The R1 R2 MF executes on blocks of 80 linear 16 bit PCM samples 10ms frames at 8000Hz sampling rate and can be called with the APIs defined in this document You can use the R1 R2 MF software in a multi tasking environment For information about installing and using the R1 R2 MF software see the topics listed below For information about Go to this page sallat DE TREES ETE OD TETTE 1
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