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New digital buses
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HDMI 1.4a
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HDMI 1.4a
IM1
HDMI 1.4a
This course covers the HDMI multimedia interface
Objectives
The course describes the architecture of a HDMI source-cable-sink system.
An introduction to Video and Audio standards is done prior to clarifying how this standards are transported through HDMI.
The analog interface is studied in detail, particularly the TMDS specification.
The course clarifies information coding / decoding schemes.
Content protection mechanisms are explained.
Ethernet connectivity and audio return channel are also covered.
This course has been delivered to several companies developing mobile phone chipsets.
A more detailed course description is available on request at
training@ac6-training.com
Prerequisites
Experience of a digital bus is recommended.
First day
INTRODUCTION TO HDMI
Digital link between audio / video source and display or video-projector
Pinout, source and sink requirements
Status exchange through VESA DDC channel
Optional HDMI Ethernet and Audio Return Channel (HEAC)
Content protection technology
Compatibility with Digital Visual Interface [DVI], adapter
Mechanical specification, connectors Type A, B, C, D and E
Dual link capability
Maximum possible bit rates
PHYSICAL LAYER
TMDS character time definition
Single-ended differential signal, definition of the swing
Sink clock recovery
Line termination and equalization
Source pre-emphasis
Source and sink TMDS characteristics, eye diagrams
I2C and CEC signal requirements
Interface testing (compliance checklist)
Lecroy QualiPHY HDMI test solution
HEAC physical layer, MLT-3 signaling
Simultaneous transmitting ARC and MLT-3 100BASE-TX signals
Differential mode and common mode transmission characteristics
SIGNALING AND ENCODING
Clock channel, pixel rate
Encoder mux
Leading and trailing guard bands and preamble
TERC4 data coding scheme
Video data coding
Purpose of auxiliary data
Error correction
Packet formats
VIDEO STREAMS
Video standard basics, SDTV, EDTV, HDTV
3D video format structure
3D transmission video formats
Video data coding 24, 30, 36 or 48 bits
Video control signals HSYNC, VSYNC
Video data decoding
Video format timing specification
Color depth requirements
Gamut-related metadata
Second day
AUDIO STREAMS
Audio basics, L-PCM coding, IEC standards
Audio sample clock capture and regeneration, N and CTS parameters
Using a CEC feedback channel to adjust the clock in the Source device
Audio, video synchronization
Audio data packetization
DST usage
HEAC audio return channel
CONTROL AND CONFIGURATION
I2C basics
The Display Data Channel [DDC] usage during configuration
VESA enhanced display data channel standard
Physical address discovery algorithm
AVI info frame
Audio info frame
E-EDID data structure
CEA extension
HDMI vendor-specific data block
DVI / HDMI device discrimination
Consumer Electronic Control
CEC command description, remote control, AV-link protocol
HEAC capability discovery and control
CDC arbitration
Channel states and transitions
Activation of an HDMI channel
HEC control for adjacent devices
Message description
Networking using 100BASE-TX
Connection to internet via home network
Switching, loop detection and removal
CONTENT PROTECTION
HDCP specification (DRM)
Authentication of devices
Computation of shared key
Multimedia contents encryption
HDCP over HDMI
ACP packets