AMBE-1000 Digital Voice Systems, Inc., AMBE-1000 Datasheet - Page 17

• Manufacturer Part Number: AMBE-1000
• Manufacturer: Digital Voice Systems, Inc.

3.
3.1
3.2
The AMBE-1000 is not recommended for new designs.
Please refer to the AMBE-2000/2020 product line.
Channel Interface
Overview
The Channel Interface is the general term used for the interface for the compressed
bits coming from the encoder and the compressed bits going to the decoder.
same interface is also used to output status information from the encoder and decoder
such as whether a DTMF tone has just been detected in the speech input, or whether
the decoder has detected and synthesized a frame of silence.
interface is used to perform more complex control operations on both the encoder and
decoder (usually at start-up).
control as well as A/D-D/A chip configuration.
It is important to realize that not all data being output from the AMBE-1000 is intended
for transmission over the channel. Status type of data is typically only useful at the
‘local’ end. In most voice transmission systems, the actual encoded bits are extracted
from the channel formatting, combined into the systems transmission stream, sent
over the transmission path, extracted from the transmission path at the receiving end,
and reassembled into the AMBE-1000’s channel format for synthesis by the decoder.
Figure 3-A Channel Interface Overview
This section will first outline the two main channel interfaces, parallel and serial and
their respective signals and timing. Section 4 will discuss the format of the data which
is transferred within these two configurations including the formatting of Command
Frames.
Parallel vs. Serial Configuration Selection
The hardware interface to the Channel Interface is configured as either a serial
interface or a parallel interface based exclusively on the hardware settings of
CH_SEL[2-0]. See Table 3-A.
relevant Voice Data bits
and formats them for
transmission over
System extracts
(Header, Status)
Overhead Data
Channel
Typical Voice Frame Output From Encoder
The AMBE-1000 is not recommended for new designs.
Please refer to the AMBE-2000/2020 product line.
Visit us at www.dvsinc.com
Voice Data (48 to 192 bits)
Transmission Channel
These control functions include speech data/FEC rate
page 17
Voice Data (48 to 192 bits)
System Overhead
(Header, Control)
Overhead Data
Typical Voice Frame Input to the Decoder
Voice Data (48 to 192 bits)
relevant Voice Data bits
Input into the Decoder
and formats them for
Control Information
adding Header and
System extracts
Additionally, this
This