AMBE-2000TM Vocoder Chip
User's Manual Version 4.0
AMBE-2000TM Vocoder Chip
User's Manual
Version 4.0
January, 2003
Copyright
, 2003
Digital Voice Systems, Inc
234 Littleton Road
Westford, MA 01886
This document may not, in whole or in part be copied, photocopied, reproduced, translated, or reduced to any electronic
medium or machine readable form without prior consent in writing from Digital Voice Systems, Incorporated.
Every effort has been made to ensure the accuracy of this manual. 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. This includes business interruption and/or other loss
which may arise from the use of this product. The information in this document is subject to change without notice.
Trademarks
AMBE-2000TM Vocoder Chip is a registered trademark of Digital Voice Systems, Inc. Other product names mentioned may be
trademarks or registered trademarks of their respective companies and are the sole property of their respective manufacturers.
All Rights Reserved
Data subject to change
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AMBE-2000TM Vocoder Chip
User's Manual Version 4.0
AMBE-2000
TM
Vocoder Chip END USER License Agreement
1.0 Preliminary Statements and Definitions
1.1 "END USER" shall mean the person and/or organization to whom the AMBE-2000TM
Vocoder Chip was delivered or provided to as specified in the purchase order or other
documentation. In the event that the END USER transfers his rights under this license to a third
party as specified in section 2.2, then this third party shall become an "END USER".
1.2 Digital Voice Systems, Inc. (DVSI) has developed a voice coding method and algorithm (the
"Technology") based on the Advanced Multi-Band Excitation ("AMBE
") voice coder. The
technology codes speech at bit rates of 2.4 to 9.6 kilobits per second (kbps) including error
correction bits.
1.3 "AMBE
Voice Compression Software" shall mean the speech coding software and/or
firmware integrated into the AMBE-2000TM Vocoder chip integrated circuit.
1.4 "Voice Codec" shall mean the AMBE-2000TM Vocoder Chip integrated circuit, the AMBE
Voice Compression Software, firmware and associated documentation, including modifications,
enhancements and extensions made by or for Digital Voice Systems, Inc. (DVSI) and including
circuit diagrams, timing diagrams, logic diagrams, layouts, operating instructions and user
manuals.
1.5 DVSI represents that it owns certain "Proprietary Rights" in the Technology and the AMBE
Voice Compression Software, including patent rights in the Technology, and patent rights,
copyrights, and trade secrets in the AMBE
Voice Compression Software.
2.0 License Granted
2.1 Subject to the conditions herein and upon initial use of the AMBE-2000TM Vocoder Chip,
DVSI hereby grants to END USER a non-exclusive, limited license to use the AMBE
Voice
Compression Software in machine readable form solely on the AMBE-2000TM Vocoder Chip.
Title to the AMBE
Voice Compression Software remains with DVSI. No license is granted for
use of the AMBE
Voice Compression Software on other than the AMBE-2000TM Vocoder
Chip. No license, right or interest in any trademark, trade name or service mark of DVSI is
granted under this Agreement.
2.2 END USER shall not copy, extract, de-compile, reverse engineer or disassemble the AMBE
Voice Compression Software contained in the AMBE-2000TM Vocoder Chip.
3.0 Transfer of License
3.1 The END USER shall have the right to transfer the AMBE-2000TM Vocoder Chip and all
rights under this Agreement to a third party by either (i) providing the third party with a copy of
this Agreement or (ii) providing the third party with an agreement written by the END USER (
hereinafter "END USER Agreement") so long as the END USER Agreement is approved in
writing by DVSI prior to transfer of the AMBE-2000TM Vocoder Chip. The END USER
Agreement shall contain comparable provisions to those contained herein for protecting the
Proprietary Information from disclosure by such third party. Third parties shall agree to accept
all the terms and conditions under either Agreement or the END USER Agreement.
4.0 Term and Termination
4.1 This Agreement is effective upon initial delivery of the Voice Codec and shall remain in
effect until terminated in accordance with this agreement.
4.2 This Agreement shall terminate automatically without notice from DVSI if END USER fails
to comply with any of the material terms and conditions herein. END USER may terminate this
Agreement at any time upon written notice to DVSI certifying that END USER has complied
with the provisions of Section 3.3.
4.3 Upon termination of this Agreement for any reason, END USER shall: (i) return all AMBE-
2000TM Vocoder Chip purchased or acquired, or in Licensee's possession, to DVSI; (ii) have no
further rights to any AMBE
Voice Compression Software or the Technology without a separate
written license from DVSI; (iii) discontinue all use of the AMBE-2000TM Vocoder Chip;
5.0 Payments
5.1 In consideration of the materials provided as part of the Voice Codec, and in consideration of
the license and rights in the AMBE
Voice Compression Software granted by DVSI, and in
consideration of DVSI's performance of its obligations hereunder, END USER agrees to pay to
DVSI the fee specified in DVSI's invoice.
6.0 Proprietary Notices
6.1 END USER shall not remove any copyright or proprietary notice on the AMBE-2000TM
Vocoder Chip or on the AMBE
Voice Compression Software.
7.0 Proprietary Information
7.1 The parties agree that the AMBE
Voice Compression Software shall be considered
Proprietary Information.
7.2 Except as otherwise provided in this Agreement, END USER shall not use, disclose, make,
or have made any copies of the Proprietary Information, in whole or in part, without the prior
written consent of DVSI.
8.0 Limited Warranty
8.1 DVSI warrants the Voice Codec to be free from defects in materials and workmanship
under normal use for a period of ninety (90) days from the date of delivery.
8.2 Except as stated in Section 7.1, the Voice Codec is 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 with respect to its correctness, accuracy, reliability,
correctness or otherwise. The entire risk as to the results and performance of the Voice Codec
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, replacement, or
correction of the Voice Codec.
8.3 DVSI represents that, to the best of its knowledge, it has the right to enter into this
Agreement and to grant a license to use the AMBE
Voice Compression Software to END
USER.
8.4 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. 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.
9.0 Limitation of Liability
9.1 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 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.
9.2 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.
9.3 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 which
caused the damages or that is the subject matter of, or is directly related to, the cause of action.
10.0 Taxes
10.1 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.
11.0 Export
11.1 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 November 30, 1999 the restricted countries are: Libya, Cuba,
North Korea, Iraq, Serbia, Taliban in Afghanistan, Sudan, Burma, Yugoslavia 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.
12.0 Governing Law
12.1 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.
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AMBE-2000TM Vocoder Chip
User's Manual Version 4.0
1.
Product Introduction
6
1.1
General Information
6
1.2
Advantages
6
1.3
Typical Applications
7
2.
AMBE-2000TM Application Design Overview
8
2.1
Basic Operation
8
2.2
Initial Design Considerations
8
2.2.1
A/D D/A Overview
8
2.2.2
Vocoder Front End Requirements
9
2.2.3
Channel Interface Overview
10
2.2.4
Speech and FEC Rate Selection Overview
11
3
Hardware Information 12
3.1
Special Handling Instructions
12
3.1.1
Storage
12
3.2
Pin Descriptions
13
3.3
Clock and Reset Timing
15
3.4
Associated Chip Delay
17
3.5
Crystal / Oscillator Usage
17
3.5.1
TTL Clock Source
17
3.5.2
Crystal Oscillator
18
3.6
Package Description
19
3.7
Normal Operating Conditions
20
3.8
Absolute Maximum Ratings
20
3.9
Electrical Characteristics and Requirements
20
4
Channel Interface
21
4.1
Overview
21
4.2
Serial Configuration Selection
22
4.3
Channel Serial Mode
23
4.3.1
Low Level Timing for Passive and Active Serial Mode
24
5
Channel Data Format
26
5.1
Framed Format
26
5.2
Framed Input
26
5.2.1
Framed Input: Word 0 : Header
27
5.2.2
Framed Input: Word 1 : Power Control ID
27
5.2.3
Framed Input: Word 1 : Control Word 1
27
5.2.4
Framed Input: Words 2-6 : Rate Information
27
5.2.5
Framed Input: Word 7 :
Unused in Input
28
5.2.6
Framed Input: Word 8 : Unused in Input
28
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AMBE-2000TM Vocoder Chip
User's Manual Version 4.0
5.2.7
Framed Input: Word 9 : Unused in Input
29
5.2.8
Framed Input: Word 10 : DTMF Control
29
5.2.9
Framed Input: Word 11 : Control Word 2
29
5.2.10 30
5.2.11
Framed Input: Words 12-23 : Channel Data
30
5.3
Framed Output
31
5.3.1
Framed Output: Word 0 : Header
31
5.3.2
Framed Output: Word 1 : Power Control ID
31
5.3.3
Framed Output: Word 1 : Control Word 1
31
5.3.4
Framed Output: Words 2-6 : Rate Information
32
5.3.5
Framed Output: Word 7 : Bit Error Rate
32
5.3.6
Framed Output: Word 8 : Soft Decision Distance
32
5.3.7
Framed Output: Word 9 : Detected Bit Errors
32
5.3.8
Framed Output: Word 10 : DTMF Control
33
5.3.9
Framed Output: Word 11 : Control Word 2
34
5.3.10
Framed Output: Words 12-23 : Channel Data
35
5.4
Unframed Serial Format
35
5.4.1
Unframed Serial Output Format
35
5.4.2
Unframed Serial Input Format
36
6
A/D-D-A Interface
37
6.1
A/D-D/A Overview
37
6.2
Configuring the A/D-D/A Interface using CODEC_SEL [1-0]
37
6.3
Low Level A/DD/A Timing
38
7
Special Functions
40
7.1
Hardware vs. Software Selection Note
40
7.2
Coding Rate Selection
40
7.3
Echo Cancellation
41
7.4
Voice Activation Detection (VAD), Comfort Noise Insertion (CNI)
42
7.5
Dual Tone Multiple Frequency, Detection and Generation
42
7.6
Normal Power and Power Saving Modes
42
7.6.1
Standard Sleep Mode
42
7.6.2
Power Down
43
7.7
Slip Enable
44
8
Appendices
48
8.1
Example A/D-D/A Usage
48
8.2
Example: Texas Instruments TLV320AIC10 Usage
49
8.3
Configuring the AD73311 for 3-Volt Operation
54
8.4
Interfacing to the Texas Instruments PCM3500 Codec
57
8.5
Expanded Tone Detection and Generation
60
8.6
Soft Decision Decoding
60
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