Balkaran Gill ( bxg28@cwru.edu )
Ramakrishnan Vijayakumar ( rxv20@cwru.edu )
ECES 488 – Prof Chris A. Papachristou
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Contents
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Introduction
Specification
Design
Memory Analysis
Components
Controller
Results and Waveforms
Cost Analysis
Marketing Analysis
Testing and Debugging
Conclusion
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Introduction
Motivation:
• Uses DSL lines
• Video Transmission (Interactive) Present
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Specification
• Modes of Operation
Call
Play Back and Recording Mode - Voice only and Video Only
• Video Transmission is carried out according to the H.320 format.
• Must Communicate with analog phones
• Handles Basic Answering Machine Features.
• 30 ( Two Minute ) audio messages stored at a time.
• 10 Video Messages ( One Minute) stored at a time
• Record Video Option which allows the user to store video.
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Specification
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The Video Phone has the following buttons
Play
– Plays the Stored Messages in the order according to
(Forward/Reverse) the button pressed.
Delete/Undelete – Deletes or Undelete the messages .Undelete can
retrieve the last two deleted messages.
Skip
Save
Memo
Stop
rec ann
hear ann
– To Skip the present message.
– To Save the current message.
– Record a Memo as a voice message.
– To Stop the Current playback.
– To Record the announcement.
– To Hear the announcement.
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Video Standards - H.320
• Video Transmission
– RTP Protocol Used
– Uses IP Multicast
– Derivative of UDP wherein a time stamp
and sequence number is added to the packet header
– Using this information receiving client can
Reorder out of sequence packets
Discard Duplicates
Synchronize audio and video after an initial buffering period
– Real Time Control Protocol used to control RTP
• Reference - http://www.teamsolutions.co.uk/tsstds.html
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Design
• Parts of the Controller we are implementing
» RAM
» Controller
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Block Diagram
Camera
Speaker
LCD
Display
Controller
Network
Interface
Unit
Media
Processing
Unit
Display
Memory
Controller
Storage
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Memory Analysis
Audio
• (8000 samples/sec * 16 bits/sample)*120 sec * (8 bits/byte)
= 1920 KB per 2 min message
• At 10:1 MPEG compression
= 192 KB per 2 min message
• 30 Messages – 5.6 MB of memory
Video
(320*240 resolution) *3 * 8 (color display) *30 (fps)
=52.7 Mbps (Million Bits per second)
• 100:1 MPEG Compression Ratio
= .527 Mbps
• Length of the message is 60 sec
= 31.62 Mb
• 10 video messages - 316.2 Mb = 40MB
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Memory Analysis
• Total Memory needed for Audio and Video
= 46MB
• 64MB ram would be needed
• The rest of 16 MB could be used for other purposes
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Components
Memory
CompactFlash Memory Card (CF 64 MB) type I
http://www.kingston.com/flash/compfl.asp#prod
Design Decisions
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Why Flash Memory ?
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Why CompactFlash Memory Card?
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Easy and Fast Information Storage
Maintains data without any external power
Very light and Noiseless
Cheapest among those available
Other Brands
» Sandisk - $ 85
» Delkin - $ 120
Dimensions - 36.4mm x 42.8mm x 3.3mm
Memory Capacity – Up to 256 MB
Endurance – 300,000 cycles per logical sector
Data Retention – 64 years
Operating Temperature - -25 to 75 c
Media Transfer Rate – Up to 3.5 Mb/sec
Interface Transfer Rate – Up to 8 Mb/sec
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Components
Digital Signal Processor
Texas Instruments TMS320C6415 – 600
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Why Texas Instrument’s DSP ?
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Latest and Important use in Broadband and Imaging Systems
Specialized DSP’s not produced by other companies like Motorola,Intel for our system
Cycle time of 1.67 ns
128Kb L1D Data Cache; 128Kb L1P Program Cache; 8Mb L2 Cache
64-channel EDMA controller with a highly-efficient transfer engine
1 – 32/16 –bit HPI, 1 – 32 bit PCI
Two external memory interfaces (EMIFs) – one 64-bit EMIFA and one 16-bit
EMIFB – to asynchronous/synchronous memories
Three Multichannel Buffered Serial Ports (McBSPs) provide over 1.8 GBytes of
bandwidth supporting a variety of audio and telecom standards
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Components
Camera
Panasonic color board camera GP- CX161 Series
• Decisions to take
– Why Panasonic ?
• Uses a built- in 10- bit DSP
• Comparatively Cheap
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Horizontal Scanning Frequency = 15.734 khz
Vertical Scanning Frequency = 59.94 khz
30 frames per second
Resolution: Horizontal Min: 330 lines, Vertical Min: 350 lines.
Dimensions: 26mm( W) x 22 mm( H) x 13. 3 mm (D)
Power Consumption: 160mA (5V input logic)
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Components
Analog to Digital Converter
Texas Instruments
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TLC320AD57
Single 5-V Power Supply
Sample Rates (f s ) up to 48 kHz
18-Bit Resolution
Signal-to-Noise (EIAJ) of 97 dB
Dynamic Range of 95 dB
Total Signal-to-Noise+Distortion of 91 dB
Serial Port Interface
Power Dissipation of 200 mW.
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Components
Digital to Analog Converter
Texas Instruments PCM69
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18-Bit Resolution Dual Audio DAC
High S/N Ratio: 110dB type (IHF-A)
Single Supply +5V Operation
Low Power: 75mW typical
Operating Temp Range: -25°C TO +85°C
Extremely Low Glitch Energy
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Components
LCD Display
NEC 5.5” Analog QVGA
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Number of pixels - 320 x 240
Colors - Full
Color Viewing angles - ± 50° (L/R), ± 25° (U/D)
Typical luminance - 250 cd/m2
Typical power consumption - 8.0 Watts
Input signals - Analog RGB and NTSC mode
Dimensions (mm) - 134.0 W x 110.0 H x 16.5 D
LCD Display Controller
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Components
Microphones
Panasonic RP–VK18
• 1/8" mini plug with 1/4" standard phono plug adaptor
• Mic. stand
• Frequency response 90Hz-10kHz
Speakers
Panasonic RP-HVS20
• Frequency response 20Hz-20kHz
• Power handling capacity 400mW+400mW (passive speaker)
Power Supply – 5V
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Controller
• State Diagrams
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Recording a Message
Placing a Call and Sending a Message
Receiving a Message
Play Back
• Simulation and Implementation in VHDL
(in progress)
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Controller
Memo Button
Reset Warning
Turn on the
Warning
Turn
off the
warning
Message
counter = 24
Check the
number of
messages
Message = [1- 23],[24-29]
Generate
memory address
and record
message & inc
message counter
Memory
Page is full
Message
Counter = 30
Delete the first
message and
decrement
message
counter
Hang Up
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State Diagram of Recording a Message
Controller
State Diagram of Sending a Message
Press
Digits
Talk
Button
Is line
Busy
Display
‘Connecting’
Hang-up
Start voice
Chatting
Voice and
Video
Chatting
Start Image
Processing and
send video
Video Button
Pressed
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Controller
State Diagram of Receiving a Message
Call mode
Modem
ringing
Caller hanged up
If modem rings
more than 4 times
Talk button
Hang up
Play
announcement
Talk button
Beep
Go to record a
message
Voice chat
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Controller
State Diagram of Play Back
Increment the
message count
and go to play
message
Play
Play forward
Delete message
Play message
and message
count
Play reverse
Delete the current
message and decrement
the message count
Undelete message
Decrement
the message
count and go
to play
message
Undelete the
last message
and increment
the message
count
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Controller
Record an announcement
Record button
Delete the
previous
announcement
Record new
announcement
Allotted memory full/
record button
Exit
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Block Diagram of Controller
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Output Waveforms
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Cost Analysis
Products
Memory (Flash Type)
Digital Signal Processor (in qty 1000+)
Camera
Analog to Digital Converter (in qty 1000+)
Digital to Analog Converter (in qty 1000+)
LCD Display (in qty 100+)
LCD Controller (in qty 100+)
Microphone
Speaker
Power Supply (in qty 100+)
Design Costs $75,000 per 1 worker
- 5 workers for 1 year – 375000/50000 units
Manufacturing Costs - $ 5,00,000/50000 units
Cost
$65.00
$65.00
$54.00
$4.63
$10.00
$75.00
$4.50
$5.00
$8.00
$5.00
Cost per unit
10% profit
Total Cost per unit
$313.13
$ 31.31
$344.44
$7.50
$10.00
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Marketing Analysis
• Panasonic Video Phone PAC 2000 - $1300
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POTS line
Very costly
Small Screen for Display
• Aiptek HyperVphone 2000T - $550
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POTS line
Supports only 15 fps
• Aiptek HyperVphone 2000M - $350
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POTS line
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Conclusion
• Lessons Learned
• VHDL Coding
• SYNOPSYS is great.
• Design and Implementation in progress
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