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License and Warranty 

VC-20 AMBE™ Vocoder Board User’s Manual

 

 

 

USER's limitations, duties and obligations regarding nondisclosure 
and copying of the AMBE™ Software.  Proprietary Information shall 
be used only by employees  of  END USER and only at the Designated 
Site, except as provided under this agreement. 
 
6.4 

END USER shall have no obligations for disclosure or use of 

Proprietary Information which: (i) is already known to END USER, at 
time of disclosure by DVSI; (ii) is or becomes publicly known through 
publication, inspection of product or otherwise through no wrongful 
act of END USER; (iii) is received from a third party without 
restriction and without breach of this Agreement; (iv) is independently 
developed by END USER; (v) is disclosed to a third party by or on 
behalf of DVSI without restriction; or (vi) is approved for release or 
use by written authorization of DVSI. 
 
6.5 

Notwithstanding any termination pursuant to Section 3.0, the 

obligations set forth in this Section 6.0 shall survive termination of this 
Agreement. 
 

7.0 

Limited Warranty

 

 
7.1 

DVSI warrants the Voice Codec and the AMBE™ Software to 

be free from defects in materials and workmanship under normal use 
for a period of ninety (90) days from the date of delivery.   DVSI 
further warrants that the Voice Codec and the AMBE™ Software 
operate in accordance with the written specifications delivered to END 
USER with the Voice Codec. 
 
7.2 

Except  as stated in Section 7.1, the Voice Codec and  

AMBE™ Software are provided "as is" without warranty of any kind.  
DVSI does not warrant, guarantee or make any representations 
regarding the use, or the results of the use, of the Voice Codec or 
AMBE™ Software with respect to its correctness, accuracy, reliability, 
currentness or otherwise.  The entire risk as to the results and 
performance of the Voice Codec or AMBE™ Software is assumed by 
the END USER.  After expiration of the warranty period, END USER, 
and  not DVSI or its employees, assumes the entire cost of any 
servicing, repair or correction of the Voice Codec or the AMBE™ 
Software. 
 
7.3 

DVSI warrants that it has the right to enter into this 

Agreement and to grant a license to use the AMBE™ Software to END 
USER. 
 
7.4 

Except as specifically set forth in this Section 7.0, DVSI 

makes no express or implied warranties including, without limitation, 
the warranties of merchantability or fitness for a particular purpose or 
arising from a course of dealing, usage or trade practice, with respect 
to the Voice Codec or AMBE™ Software.  Some states do not allow 
the exclusion of implied warranties, so the above exclusion may not 
apply to END USER.  No oral or written information or advice given 
by DVSI or its employees shall create a warranty or in any way 
increase the scope of this warranty, and END USER may not rely on 
any such information or advice.  The limited warranties under this 
section 7.0 give END USER specific legal rights, and END USER may 
have other rights which vary from state to state. 
 
 
 
 

8.0 

Limitation of Liability 

 

8.1 

In no event shall DVSI be liable for any special, incidental, 

indirect or consequential damages resulting from the use or 
performance of the Voice Codec or  VC-20 AMBE™ Vocoder Board 
whether based on an action in contract, tort (including negligence) or 
otherwise (including, without limitation, damages for loss of business 
profits, business interruption, and loss of business information), even if 
DVSI or any DVSI representative has been advised of the possibility of 
such damages. 
 
8.2 

Because some states do not allow the exclusion or limitation of 

liability for consequential or incidental damages, the above limitations 
may not apply to END USER. 
 
8.3 

DVSI's maximum liability for damages arising under this 

Agreement shall be limited to 20% (twenty percent) of the fees paid by 
END USER for the particular Voice Codec or  VC-20 AMBE™ 
Vocoder Board which caused the damages or that is the subject matter 
of, or is directly related to, the cause of action. 
 

9.0 

Taxes

 

 
9.1 

All payments required under Section 4.0 or otherwise under 

this Agreement are exclusive of taxes and END USER agrees to bear 
and be responsible for the payment of all such taxes (except for taxes 
based upon DVSI's income) including, but not limited to, all sales, use, 
rental receipt, personal property or other taxes which may be levied or 
assessed in connection with this Agreement.

 

 

10.0 

Export

 

 
10.1 

United States export laws and regulations prohibit the 

exportation of certain products or technical data received from DVSI 
under this Agreement to certain countries except under a special 
validated license.  As of May 20, 1996 the restricted countries are: 
Libya, Cuba, North Korea, Iraq, Serbia, Montenegro, and Iran.  The 
END USER hereby gives its assurance to DVSI that it will not 
knowingly, unless prior authorization is obtained from the appropriate 
U.S. export authority, export or re-export, directly or indirectly to any 
of the restricted countries any products or technical data received from 
DVSI under this Agreement in violation of said United States Export 
Laws and Regulations.  DVSI neither represents that a license is  not 
required nor that, if required, it will be issued by the U.S. Department 
of Commerce.  Licensee shall assume complete and sole responsibility 
for obtaining any licenses required for export purposes.

 

 

11.0 

Governing Law

 

 
11.1 

This Agreement is made under and shall be governed by and 

construed in accordance with the laws of the Commonwealth of 
Massachusetts, except that body of law governing conflicts of law.  If 
any provision of this Agreement shall be held unenforceable by a court 
of competent jurisdiction, that provision shall be enforced to the 
maximum extent permissible, and the remaining provisions of this 
Agreement shall remain in full force and effect. 
 

12.0

 

Notices

 

 
12.1 

Any notices to DVSI which may be given hereunder shall be 

in writing and sent to:  Digital Voice Systems Inc., 234 Littleton Road, 
Westford, MA., 01886, U.S.A. 
 

 

Содержание VC-20-MR2

Страница 1: ... 101111010100110101 2 2 2 2 4 2 6 2 8 3 3 2 3 4 3 6 3 8 4 4 2 C lean M O S Traffic D M O S TruckNoise 1 5 d B TruckN o ise 6 d B Babble D M O S BackgroundNoiseCondition A M B EVoiceCoder 3 6kbs A v g ofO thers 3 6bps V S E L P 8 0kbps M eanOpinion Score M O S orD M O S F I R S T P L A C E B est Vocoder ...

Страница 2: ......

Страница 3: ...VC 20 AMBE Vocoder Board User s Manual The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC VC 20 AMBE Vocoder Board USERS MANUAL Version 2 0 ...

Страница 4: ... However Digital Voice Systems Inc makes no warranties with respect to the documentation and disclaims any implied warranties of merchantability and fitness for a particular purpose Digital Voice Systems Inc shall not be liable for any errors or for incidental or consequential damages in connection with the furnishing performance or use of this manual or the examples herein The information in this...

Страница 5: ...together with a copy of this Agreement provided that END USER provides DVSI with a written notification of the transfer and provided that the third party agrees in writing to accept all the terms and conditions of this agreement Upon any such transfer END USER s rights under this Agreement shall terminate pursuant to Section 3 0 b END USER may relocate the Voice Codec and the subsequent location s...

Страница 6: ... USER specific legal rights and END USER may have other rights which vary from state to state 8 0 Limitation of Liability 8 1 In no event shall DVSI be liable for any special incidental indirect or consequential damages resulting from the use or performance of the Voice Codec or VC 20 AMBE Vocoder Board whether based on an action in contract tort including negligence or otherwise including without...

Страница 7: ...BE VOCODER BOARD OVERVIEW 5 2 1 ADVANCED MULTI BAND EXCITATION AMBE VOCODER 5 2 2 VC 20 AMBE VOCODER BOARD BASIC OPERATION 5 2 3 SPECIAL HANDLING AND STORAGE PRECAUTIONS 7 Section 33 BOARD SET UP CONFIGURATION 9 3 1 CONNECTION SPECIFICATIONS 9 3 2 DIN41612 96 PIN CONNECTOR SPECIFICATIONS 10 3 3 VC 20 MR2 CONNECTOR SIGNALS 11 3 4 VC 20 MR2 CONNECTOR SIGNALS 11 3 5 VC 20 MR2 ON BOARD JUMPERS CONNECT...

Страница 8: ......

Страница 9: ...4 8 2 4 kbps data bit stream from a modem or similar device This received bit stream is processed by the decoder and converted into a synthetic speech signal which is then converted into an analog signal using the on board D to A converter The encoder and decoder are fully asynchronous The VC 20 MR2 4800bps has been designed to be robust to both acoustic background noise and channel errors It gene...

Страница 10: ...ovide performance equal to today s digital cellular systems at under half the data rate The AMBE voice compression algorithm is used in applications throughout the world including the next generation of digital mobile communication systems 1 2 VC 20 AMBE Vocoder Board Features High Quality Low Data Rate Speech Coding Extremely Flexible Bit Rate Selection 1 3 AMBE 1000 Vocoder Chip Features High Qu...

Страница 11: ...ard User s Manual page 3 The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC Cellular Telephony and PCS Satellite Communications Digital Mobile Radio Secure Communications Voice Multiplexing Voice Mail Multimedia Applications Video Conferencing ...

Страница 12: ......

Страница 13: ...ther CELP or VSELP and therefore it is easily integrated into low cost low power communication integrated circuits 2 2 VC 20 AMBE Vocoder Board Basic Operation Connections are made to the VC 20 MR2 using the attached DIN 41612 connector which is described in Sections 4 and 5 The user must supply the VC 20 MR2 with a 5v digital power supply and a 5v analog power supply It is preferable to decouple ...

Страница 14: ...ng their on board clocks to generate the signals TXCK FMEN RXCK and FMDE In this mode the encoder on the first VC 20 MR2 is connected to the decoder on the second VC 20 MR2 Similarly the decoder on the first VC 20 MR2 is connected to the encoder on the second VC 20 MR2 This is shown in Figure 4 Generally the encoder signals on each board are synchronized with the oscillator on that board and the d...

Страница 15: ...olding the RATE high selects the 4 8kbs system holding it low selects the 2 4kps system 2 3 Special Handling and Storage Precautions CAUTION Handling Instructions Although the VC 20 AMBE Vocoder Board incorporates input protection circuitry to avoid damage from the accumulation of a static charge industry standard electrostatic discharge precautions and procedures must be employed during handling ...

Страница 16: ......

Страница 17: ...ance 600 ohm Sensitivity 0 dBm0 0 dBm Sinusoidal Overload 3 17 dBm0 Nominal Level 23 dBm0 average speech level Dynamic Range 10 dB relative to Nominal Level Noise Level 72 dBm0 Analog Output Type single ended Impedance low impedance output capable of driving a 600 ohm load Sensitivity 0 dBm0 0 dBm Sinusoidal Overload 3 17 dBm0 Nominal Level 23 dBm0 average speech level Dynamic Range 10 dB relative...

Страница 18: ...d 15 Output DTMF_DET Rsvd Input DINRS 16 Output DTMF_DAT Rsvd Rsvd 17 Output ENSLNCE Rsvd Rsvd 18 Input RXD1 Rsvd Rsvd 19 Input RXD0 Rsvd Rsvd RATE 20 Gnd GND Rsvd Gnd GND 21 Input LOST Rsvd Rsvd 22 Rsvd Rsvd Input FS 23 Rsvd Rsvd Input ECHO 24 Input VAD Rsvd Rsvd 25 Input DESLNCE Rsvd Rsvd 26 Gnd GND Rsvd Gnd GND 27 Anlg Pwr 5v analog Rsvd Anlg Pwr 5v analog 28 Anlg Pwr 5v analog Rsvd Anlg Pwr 5v...

Страница 19: ...der frame flag Active High FS I Frame Steal Flag Active Low GND Pwr Digital Ground GND Anlg Pwr Analog Ground HD_SD I Enable Soft decision Decoding Active Low LOST I Lost speech frame detected flag Active High RATE I Rate selection pin High 4 8bps Low 2 4bps RESX O Internal Reset Status Active Low RUN O Run Status Signal Active High RXCK I Receive data bit clock 4 8 2 4 kHz RXD I Receive data I ch...

Страница 20: ... DTMF_DET is high The data is synchronous with the rising edge of TXCK This signal should be ignored when DTMF_DET is inactive DTMF_DET The DTMF_DET flag is activated by the encoder if it detects a dtmf tone on VRXI The DTMF_DET is brought high on a rising edge of TXCK and held high for four clock cycles During this time the DTMF data is output on DTMF_DAT The DTMF_DET flag is only output once for...

Страница 21: ...frame steal packet on TXD If left unconnected this signal is pulled internally to the disabled state high GND AGND GND is the digital ground signal and AGND is the analog ground signal These signals are connected on the VC 20 MR2 HD_SD The HD_SD signal must be set low to enable soft decision decoding or held high to disable soft decision decoding This signal is sampled on the falling edge of the f...

Страница 22: ...nals input to the decoder These signals provide three bits of soft decision information with RXD being the MSB and RXD0 being the LSB These signals are each clocked into the VC 20 MR2 on each falling edge of RXCK resulting in a total data rate of 4 8 2 4 kbps Note that when interfacing to a modem or other device that only provides a single bit of received data i e hard decision then this signal sh...

Страница 23: ...ects TXD to RXD MSB 8 reserved leave unconnected 9 reserved leave unconnected 10 reserved leave unconnected 11 Deactivates LOST signal 12 Connects ENSLNCE to DESLNCE signal 13 reserved leave unconnected 14 reserved leave unconnected 3 6 VC 20 MR2 DTMF Tone Data The VC 20 MR2 supports dtmf detection transmission and generation The encoder detects and transmits dtmf tones and the decoder decodes and...

Страница 24: ... 4 1209 Hz 770 Hz 0010 7 1209 Hz 852 Hz 0011 1209 Hz 941 Hz 0100 2 1336 Hz 697 Hz 0101 5 1336 Hz 770 Hz 0110 8 1336 Hz 852 Hz 0111 0 1336 Hz 941 Hz 1000 3 1477 Hz 697 Hz 1001 6 1477 Hz 770 Hz 1010 9 1477 Hz 852 Hz 1011 1477 Hz 941 Hz 1100 A 1633 Hz 697 Hz 1101 B 1633 Hz 770 Hz 1110 C 1633 Hz 852 Hz 1111 D 1633 Hz 941 Hz Table 1 DTMF Tone Data By default the VC 20 AMBE is jumpered to use IRQ 11 and...

Страница 25: ... VOICE SYSTEMS INC 4 DVSI Services and Support Solutions 4 1 Technical Support If you have any problems with the VC 20 AMBE or have questions about its operation please contact Digital Voice Systems Inc 234 Littleton Road Westford MA 01886 USA Phone 978 392 0002 Fax 978 392 880166 email info dvsinc com web www dvsinc com ...

Страница 26: ...E DESLNCE RXD RXD1 RXD0 RXCK LOST ENCODER DECODER Figure 2 Vocoder Connections In Loop back Mode On Board Clock Frame Generator VFXI VFRO jumper 1 jumper 3 jumpers 5 6 7 jumper 12 jumper 4 jumper 2 jumper 11 HD_SD ECHO VAD RATE ...

Страница 27: ... Speech Compression Specialists DIGITAL VOICE SYSTEMS INC TXD TXCK FMEN FMDE DESLNCE RXD RXD1 RXD0 RXCK LOST ENCODER DECODER MODEM Figure 3 Typical Connections between Vocoder and a General Modem VFXI VFRO HD_SD ECHO VAD RATE ENSLNCE Note Not meant to represent an off the shelf modem ...

Страница 28: ...ER 1 DECODER 1 On Board Clock Frame Generator 1 FMEN TXCK LOST FMEN TXCK FMDE RXCK TXD DESLNCE TXD RXD On Board Clock Frame Generator 2 VFXI VFRO VFRO VFXI jumper 11 jumper 3 jumper 1 jumper 3 jumper 11 jumper 1 jumper 12 jumper 12 HD_SD ECHO VAD RATE HD_SD ECHO VAD RATE ENSLNCE ENSLNCE ...

Страница 29: ...r s Manual page 21 The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC Figure 5 Channel Interface Timing Relationships TXCK FMEN TXD ENSLNCE 500 ns RXCK FMDE RXD RXD1 RXD0 LOST DESLNCE HD_SD VAD ECHO 500 ns 20 ms 1 rate seconds 20 ms N A 1 rate seconds ...

Страница 30: ...RUN 13 25ms 20ms Figure 6 RUN Signal Timing 6 75ms Encoder Window Decoder Window ...

Страница 31: ...oard User s Manual page 23 The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC Figure 7 Vocoder Physical Dimensions bottom view 3 0 mm 5 5 mm 41612 Connector 112 mm 100 mm 7 5 mm side view 11 mm 7 5 mm 112 mm components 12 5 mm connections 2 mm ...

Страница 32: ...NOTES ...

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