Related Manuals for Digital Voice Systems VC-20
Summary of Contents for Digital Voice Systems VC-20
- Page 1 Digital Voice Systems, Inc. The Speech Compression Specialists VC-20™ Serial Speech Data Interface Application Note Version 1.2 Nov, 2002 Serial Speech Data Interface VC-20 -...
- Page 2 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.
- Page 3 Payments In consideration of the hardware, software, and associated materials provided as part of the VC-20™ - Vocoder Board, and in consideration of the license and rights in the AMBE™ 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.
- Page 4 END USER with the Voice Codec. Except as stated in Section 7.1, the VC-20™ - Vocoder Board 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™...
-
Page 5: Operation
This digitized speech is then processed by the encoder and converted into a data bit stream. This bit stream is output to a modem or similar device. Simultaneously, the VC-20™ - - receives a 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. - Page 6 SCLK and clocked in on the falling edge (see Section 6. Timing Diagrams). The speech data from the VC-20™ is clocked serially out on DX. These 16-bit linear words are clocked out MSB first. The range of these twos complement coded words is –32768 to 32767.
- Page 7 4. Connection Specifications DIN 41612 Connector (male) ROW C Function Name Output SP_RDY See corresponding VC-20 Manual for remaining pin-out of Rows A and C Note: Input = INPUT to the VC-20 Output = OUTPUT from the VC-20 VC-20 - Serial Speech Data Interface ROW B...
- Page 8 5. Example Configuration VC 20 SP_RDY (C7) FSR (B12) SCLK (B9) 6. Timing Diagrams Burst Mode (128kHz. < SCLK < 5.16 MHz.) SCLK FSX / FSR DX / DR Tri-state Driver FSX (B7) DX (B6) DR (B11) External Codec SYNC...
-
Page 9: Dvsi Technical Support
Continuous Mode (Special Case when SCLK = 128 kHz.) SCLK FSX / FSR DX / DR 7. DVSI Technical Support If you have any problems with the VC-20™ - - or have questions about its operation, please contact: Digital Voice Systems, Inc. 234 Littleton Road Westford, MA 01886...
Need help?
Do you have a question about the VC-20 and is the answer not in the manual?
Questions and answers