1. Group Members: Kevin Wang Henry Shih Yu Xing
EECS 373 Talk
Group Members:
Kevin Wang
Henry Shih
Yu Xing

2. Introduction Compact audio/video interface
Carry both uncompressed high definition video along with all existing muti-channel audio formats
Standard for HDTV – 1080p 1920x1080 with widescreen aspect ratio of 16:9
Backward Compatible
Used in HD DVD Players, Digital Cameras and camcorders, Personal Computers, Tablets, Mobile phones, Projector
DVI – HDMI
DVI just needs an adaptor

3. Background
HDMI Working Group began development on HDMI 1.0 on April 16, 2002
HDMI 1.0 Released December 9, 2002
HDMI 1.3 Released June 22, 2006
Six million HDMI device sold in 2004
17.4 million in 2005
60 million in 2006
143 million in 2007
600 million by 2011
More recent data

4. Why do we need to use HDMI in Embedded System?

5. HDMI vs DVI vs VGA HDMI 1.3 (High-Definition Multimedia Interface) DVI
(Digital Visual Interface)
VGA
(Video Graphics Array)
Digital or Analog
Digital
Analog
Clock Speed
340 MHz
165 MHz
MHz
Total Bandwidth
10 Gbps
4.95 Gbps
DAC-dependent
Audio
Yes No
Resolution
4196 x 2160 px
3840 x 2400 px
800 x 600 px
Width of Connector
20.9 mm
39.5 mm
35 mm
Protocol
TMDS
Scale

6. Different Types of Connectors

7. How does HDMI Communicate?
Pin Number
Pin Function
Pin 1
TMDS Data2+
Pin 11
TMDS Clock Shield
Pin 2
TMDS Data2 Shield
Pin 12
TMDS Clock−
Pin 3
TMDS Data2−
Pin 13
CEC
Pin 4
TMDS Data1+
Pin 14
Reserved
Pin 5
TMDS Data1 Shield
Pin 15
SCL (I²C Serial Clock for DDC)
Pin 6
TMDS Data1−
Pin 16
SDA (I²C Serial Data Line for DDC)
Pin 7
TMDS Data0+
Pin 17
DDC/CEC/HEC Ground
Pin 8
TMDS Data0 Shield
Pin 18
+5 V (max 50 mA)
Pin 9
TMDS Data0−
Pin 19
Hot Plug detect 
Pin 10
TMDS Clock+
DDC
CEC
TMDS

8. DDC(Display Data Channel)
“plug and play”
Enable the computer host to adjust monitor parameters
Plug & Play
The DDC is used by the transmitter to read the receiver’s Enhanced Extended Display Identification Data (E-EDID) in order to discover the receiver’s configuration and capabilities.
Plug and play: one with a specification that facilitates the discovery of a hardware component in a system without the need for physical device configuration or user intervention in resolving resource conflicts. Used in device such as USB
Monitor Parameters:, such as brightness and contrast.

9. CEC(Consumer Electronics Control)
Up-to 15 CEC-enabled devices
Only one remote control needed
 Allow the user to command and control up-to 15 CEC-enabled devices, that are connected through HDMI, by using only one of their remote controls
CEC stands for Consumer Electronics Control. It is implemented as a single wire bus in the HDMI connector (pin 13). It allows various HDMI-enabled products to connect and communicate with each other. It allows various HDMI-enabled products to connect and communicate with each other. The intent is to enable one remote control to interface with all the A/V components. Various message opcodes can be exchanged between the connected systems in order to do device specific actions (like recording on a STB/DVR) or get general information across (like transferring remote control key press details).

10. TMDS(Transition Minimized Differential Signaling)
Reduce EM interference and enable clock recovery
Eliminates A/D and D/A conversion
Supports native 16 million true-color resolution
TMDS Transport Leverages The Native Digital Environment Of Fixed Pixel Displays Such As LCD Panels
TMDS
A/D & D/A
HDMI
DVI
VGA

11. Channels Four differential pairs for data and clock channels
Data channels: video, audio and auxiliary data
Clock channels: video pixel rates
Three different packet types
The Video Data Period
The Data Island Period
The Control Period
Remember to relate back to USB, VGA, CAN

12. Packet Types Video data period Data island period Control period
8b/10b encoding (
Transmit active video pixels
Data island period
4b/10b encoding (DVI hasn’t)
Transmit series of packets of audio and auxiliary data
Control period
2b/10b encoding
Required between two periods above
8b/10b line code maps 8bit symbol to 10 bits. Reduce the demand for the lower bandwidth limit of channel to transfer the signal

14. Summary so far Digital Signal Transmission Audio and Video 1080p
TMDS - Multiple transmit period
Compact in Size

15. Application - Board Raspberry Pi Panda Board Credit-card Size
Developed by UK
Using Broadcom BCM2835
SoC
- CPU: ARM1176JZF
Panda Board
Using TI OMAP4430 SoC
CPU: ARM Cortex M9

16. Board - Layout Panda Board Raspberry Pi
Both Supports 1080p HDMI output

17. Projects Using HDMI Raspberry Pi PandaBoard - EECS 452 - Robotics
- EECS 452
PandaBoard
- Robotics

18. QUESTIONS?! ?

19. Reference
explained-difference-vga-dvi-hdmi-ports/
true-cost-of-a-raspberry-pi-is-more-than-you-think