8/6/2019 ADPCM-HCO_PB_1_5_2
1/2
ADPCM-HCO PSPSPSPS-IPIPIPIP
Product Brief
________________________________________________________________________
Page 1 of 2
____________________________________________________________________________________________________________
Rev. 1.59/04 Copyright 2001 Pinpoint Solutions, Inc ADPCM-HCO
ADPCM Voice Compression logic Core(HCO) High Channel-count
optimizedDescription Block Diagram
The Pinpoint Solutions Inc, ADPCM-HCO is ahardware optimized
CMOS soft logic core,designed to perform the task of large-scale
voicecompression as a co-processing system element.The design is a
unique realization of the G.726algorithm that allows for a very
high channelcount up to 672 full duplex channels may be
processed by the core. The product supports theADPCM standard
for digital voice compressionas defined in the ITU-T G.726
specification. Thetrue benefit of using the core is to
significantly
reduce transport or storage bandwidthrequirements. The core is
designed to offload theinternal voice processing tasks from RISC or
DSP centric architectures. Flexibility is key tothe usage of this
core for final implementation asan ASIC, FPGA or element in a SOC
design.
Product features:
Processes 1 to 672 full duplex, 1344 half duplex
voice channels.
Simple synchronous bus interface.
No register based configuration or core setup isrequired.
Sequential channel processing, addressed channel
operation.
Channel by channel, frame by frame
encode/decode, and code format.
Implements ITU-T G.726 specification.
(32, 24, 16 fixed rate codes)
A-law, -law, Linear code format selection on a
per channel basis.
Single cycle encoding/decoding of voice samples
ADPCM-HCOASIC/FPGA
ExampleImplementation
RAM1
Data In
RAM2
RAM3
RAM4
RAM5
RAM6
ENCODEREngine
DECODEREngine
COMPRESSIONDECOMPRESSIONSTATE MACHINE
I/OInterfaceControl
HOSTINTERFACE
LOGIC
PCM to ADPCMADPCM to PCM
Data Out
Encode/Decode
Nx6x24
Nx6x24
Nx6x24
Nx6x24
Nx6x24
Nx6x24
SD_out [13:0]
S_in [13:0]
CH # SELchannel [10:0]
enable
law [1:0]decode
clk
algo_reset
timer [2:0]
"State" RAMInterface
Note: PSI does not supply the RAM "IP" elements.See memory
requirements in the data sheet.
I/OCOMMAND
& CONTROL
code[2:0]
reset_n
Key Benefits of Implementation: FPGA or ASIC Implementation.
Lower power consumption.
Scaleable channel count design.
Reduced board space.
Cost reduction (per channel associated cost).
DSP/CPU Task offloading.
Applications: (IAD) Integrated Access Devices.
Voice/Data multiplexers.Channel Bank Voice Concentrators.
Voice over IP/DSL (Packet/Cell/Frame) Voice Storage (selected
record and playback). Wireless: DECT and Cellular. Voice
Gateways.
Videoconferencing. (SOHO) Small Office Home Office.
DSL Modems.Cable Modem.
(CO) Central office equipment.DSLAM.Cable Modem Head End
equipment.Large scale Voice Concentrators.
Computer Telephony Integration.Voice mail.WAN voice
processing.
PBX (Private Branch Exchange).
8/6/2019 ADPCM-HCO_PB_1_5_2
2/2
ADPCM-HCO PSPSPSPS-IPIPIPIP
Product Brief
________________________________________________________________________
Page 2 of 2
____________________________________________________________________________________________________________
Rev. 1.59/04 Copyright 2001 Pinpoint Solutions, Inc ADPCM-HCO
Specifications:
Host Interface: Synchronous parallelInternal Ram requirements
per channel:
Nx6x24 bits per half-duplex channel
Operating frequency:
43.008MHz processing 672 channels (336 full-duplex)86.016MHz
processing 1344 channels (672 full-duplex)
Standards compliance: ITU-T G.726, (Optional G.727)
Compression code rates: 32, 24, 16Kbs
Deliverables Test bench for the logic core, and
control scripts to run Verilogsimulations to exercise the ITU
standardvectors for the all G.726 rates.
Primetime script/shell for verifyingtiming of the core.
Synthesis script/shell to assist insynthesis of the core.
Test bench core coverage analysisdocument.
Verilog RTL soft-logic core.
HEW LETTPACKARD
Integrated Access Device (Voice / Data Multiplexer)Using the
ADPCM-HCO
HEW LETTPACKARD
WAN Services(Frame-Relay)
(ATM)(Channelized)
T3 (45Mbs)
T3 (45Mbs)
DATA Resources
1 2 3
4 5 67 8 9
* 8 #
Voice Resources
672 VoiceChannels
22.5MbsData pipe
Location A
1 2 34 5 67 8 9
* 8 #
DATA Resources
Location B
672 VoiceChannels
22.5MbsData pipe
Voice Resources
*Note: Application based on 32Kbps voice algorithm.
PSI Reference Documents
ADPCM-HCO Data sheetApplication notesWhite papers
Options core include: Scalable encoding/decoding channel
counts. Auto-channel Processing mode. Logic BIST
Custom Interface options. FPGA specific targeting. Asynchronous
bus interface. VHDL testbench. ITU-T G.727 support.
Product InformationUpon request, PSI will provide complete
quotationfor this product including: pricing, deliverables list,and
licensing agreements.
Pinpoint Solutions. Inc.5171 Eldorado Springs DriveBoulder, CO
80303Tel: 303.543.0050
Fax: 303.494.5769HTTP:\\ www.asic-design.com
Product Information Requests:mailto:[email protected]
