D6386A-11 [ETC]
Telecommunication IC ; 电信IC\n
| 型号： | D6386A-11 |
| 厂家： | 
ETC |
| 描述： | Telecommunication IC
|
| 文件： | 总4页 (文件大小：451K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
D6386A
HANDSFREE Chip for an all Digital Telephone Answering Device
with True FULL Duplex SpeakerPhone and Speech Recognition
General Description
The D6386A chip is a digital speech/signal processing subsystem that implements all functions of TRUESPEECH
speech compression and voice prompts, telephone line signal processing, memory management, FLEXISPEECH and
True FULL Duplex SpeakerPhone for an all digital answering machine. In addition, the D6386A has Speech
Recognition capability for voice control of the answering machine. The D6386A is fully controlled by the system Host
through a simple interface protocol. The Host controller provides activation and control of all system functions such as
speech recording and playback, DTMF and call progress tone detection, DTMF and tone generation, and voice
prompting.
Host
Controller
Telephone
Phone
Line
Line
Interface
CODEC
CODEC
Voice
Prompt
ROM
A
D6386A
DSP Speech
Processor
Speaker
Phone
Interface
ARAM
Memory
Optional
Figure 1. D6386A System Block Diagram
Key Features
n High-quality, variable low rate TRUESPEECH digital n Storage of 32 telephone numbers for speed dialing
speech compression allowing 14-15 minutes of
recording time per each 4 Mbit ARAM (Audio
Grade DRAM)
n Easy Host software conversion from the D6305B
n FLEXISPEECH variable speed, natural sound
playback (50%-200%)
n TRUESPEECH, natural-sound voice prompting, for
Day/Time stamp and voice instructions
n Selectable Master/Slave CODEC operation
n Supports offset playback for jumps within a
message
n Speaker-Dependent speech activated funtions,
supports multi-users in noisy environments with
n True FULL Duplex SpeakerPhone with both
acoustical and near-end echo cancellation
high recognition rate (>97%)
Eight Speakers
n Programmable Thresholds for VOX, DTMF, and
Call Progress
64 Word Vocabulary each
n Flexible storage of incoming messages (ICM),
outgoing messages (OGM). Supports multiple
OGMs and multiple mailboxes
n Digital Volume Control
n Simple 8-bit Host Hardware Interface
n DTMF generation and detection with near-end
echo cancellation for superior performance
D6386A
AA
Device Configuration and System Components
n D6386A-11 Digital Telephone Answering Device (TAD) processor
(80-pin PQFP) 1 each
STANDARD COMPONENTS
This is supplied by the customer according to DSP Groups specifications.
n D0000-29 Analog I/O Interface (16-pin DIP) 1 each, 2 for SpeakerPhone
One of the following:
ADDITIONAL SYSTEM COMPONENTS
n D0000-35C - 4Mb ARAM message memory (SOJ), up to four devices per
system, or
n D0000-36C - 16Mb ARAM message memory (SOJ), up to two devices per
system
n EPROM/ROM - Voice Prompt storage, each 32Kx8 device supports up to
35.4 seconds of Voice Prompts (up to 64K)
OPTIONAL SYSTEM COMPONENTS
A
Top View
D6386A-11
Figure 2. D6386A-11 Pin Diagram
D6386A
AA
System Functions
All of the speech processing tasks are done by the DSP Speech Subsystem. This allows the use of a very low cost
microcontroller to be used for basic control of the system. The Host need only send high level commands to perform
functions such as Record Message or Delete Message and the operation will be performed by the DSP subsystem which
will report the status of the operation to the Host. All memory interface and management will be taken care of by the
DSP requiring the Host to only handle high level system functions. A summary of the functions performed by the DSP
Speech Subsystem and Host Controller are shown in Figure 3, below.
DSP Speech Subsystem
n
n
n
n
n
n
n
n
n
n
n
Speech Recording
Speech Playback
Host Controller
Memory / Message Management
DTMF and Tone Genertion
DTMF Detection
n
n
n
Control the System
Read Buttons
Call Process Detection
Time / Date Stamping
Voice Prompts
Control Displays / Switches
Phone Number Storage
SpeakerPhone Functions
Voice Activated Operation
Figure 3. System Functions
Simple Hardware Interface
The hardware interface between the D6386A and the Host Controller is a simple one requiring only an 8 bit parallel
port and 4 handshake lines. The Host writes high level Commands to the D6386A and the D6386A will respond with
Status information. Once a Command is issued the D6386A will use the ACK pin to indicate that the Status is
available to be read. The hardware interface between the D6386A and Host is shown in Figure 4 below.
8051
D6386A-11
8
Port 0
HSTD0-7
RD
WR
HSTR
HSTW
HI/LO
ACK
HI/LO
INT
Figure 4. D6386A / Host Interface
Benefits of the D6386A
n High-Quality, variable low rate TRUESPEECH
digital speech compression allowing 14-15 minutes
of recording time in 4 Mbits of ARAM
n Allows flexibility in design for features such as
multiple mailboxes and multiple OGMs allowing
design of a product that is truly a Personal Voice
Mail System
n TRUESPEECH natural sounding voice prompts and
time/date stamping allow design of a high quality
and professional sounding product
n The Host selectable thresholds for VOX, DTMF,
and Call Progress and the selectable progress tone
filter allows flexibility in design for various
countries and different applications
n Speaker Dependent Speech Recognition for voice
activated control
n The True Full-Duplex SpeakerPhone capability
allow a very professional sounding SpeakerPhone to
be added to your product with a very minimal
additional cost
Allows for a truly Hands-Free answering
machine
Provides the unique feature of voice command
operation with little extra system cost
Recognition is very robust in noisy
environments such as homes and offices
TRUESPEECH is a registered trademark, and FLEXISPEECH and True FULL Duplex SpeakerPhone are trademarks of DSP Group, Inc. Other company and product
names mentioned in this document may be the trademark or registered trademark of their respective manufacturers.
PO-1/96
Printed in USA
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