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EN 74<br />
9.<br />
<strong>LC7.1E</strong> PA<br />
Circuit Descriptions, Abbreviation List, and IC Data Sheets<br />
9.8 HDMI<br />
9.9 Abbreviation List<br />
9.8.1 Introduction<br />
Note: Text below is an excerpt from the ”HDMI Specification”<br />
that is issued by the HDMI founders (see http://www.hdmi.org).<br />
The High-Definition Multimedia Interface is developed for<br />
transmitting digital signals from audiovisual sources to<br />
television sets, projectors and other video displays.<br />
HDMI can carry high quality multi-channel audio data and can<br />
carry all standard and high-definition consumer electronics<br />
video formats. Content protection technology is available.<br />
HDMI can also carry control and status information in both<br />
directions.<br />
HDMI is backward compatible with DVI (1.0). Compared with<br />
DVI, HDMI offers extra:<br />
• YUV 4:4:4 (3 x 8-bit) or 4:2:2 (up to 2 x 12-bit), where DVI<br />
offers only RGB 4:4:4 (3 x 8 bit).<br />
• Digital audio in CD quality (16-bit, 32/44.1/48 kHz), higher<br />
quality available (8 channels, 192 kHz).<br />
• Remote control via CEC bus (Consumer Electronics<br />
Control): allows user to control all HDMI devices with the<br />
<strong>TV</strong>'s remote control and menus.<br />
• Smaller connector (SCART successor).<br />
• Less cables: e.g. from 10 audio/9 video cables to 3 HDMI<br />
cables.<br />
9.8.2 Implementation<br />
The IC used is the Sil 9025 (Silicon Image) third generation<br />
HDMI receiver (item 7817 on the SSB) with following features:<br />
• Dual HDMI input connector.<br />
• Two EEPROMS to support EDID.<br />
• HDMI audio.<br />
• I 2 S output to DACs which operating freq. of 32 to 192 kHz.<br />
• Integrated HDCP decryption engine.<br />
• Built-in pre-programmed HDCP keys for copy protection.<br />
• Colour space conversion RGB to YCbCr.<br />
• “Hot Plug Reset” signal.<br />
HDMI 1<br />
HDMI 2<br />
EDID<br />
EDID<br />
COMP_AUDIO LR<br />
for DVI audio input<br />
only<br />
(Port 1)<br />
Hot plug<br />
Reset<br />
HDMI<br />
Receiver<br />
Sil9025<br />
(Port 2)<br />
DDC Reset<br />
24 bits YCbCr 4:4:4<br />
H and V Sync<br />
I2S DAC<br />
Figure 9-10 HDMI implementation<br />
Trident<br />
CX32<br />
HDMI connectors 1 and 2 are connected to resp. ports 1 and 2<br />
of the HDMI receiver. The ports cannot be activated at the<br />
same moment. Switching is controlled by software.<br />
“Hot Plug Reset” and “DDC Reset” are controlled by the<br />
microprocessor.<br />
I2S<br />
HDMI_HOTPLUG_RESET<br />
DDC_RESET<br />
Data Enable<br />
HDMI CLK<br />
HDMI_Audio LR<br />
Microprocessor<br />
Audio Processor<br />
Micronas MSP4450P<br />
The HDMI receiver will convert all RGB or YCbCr 4:2:2 signals<br />
to 24-bit YCbCr 4:4:4. When it receives a YCbCr 4:4:4 signal it<br />
will just pass the signal directly to the Trident Video Processor.<br />
RST<br />
I 2 C<br />
G_16860_078.eps<br />
010207<br />
1080i<br />
1080 visible lines, interlaced<br />
1080p<br />
1080 visible lines, progressive scan<br />
2CS<br />
2 Carrier Sound<br />
2DNR<br />
Spatial (2D) Noise Reduction<br />
3DNR<br />
Temporal (3D) Noise Reduction<br />
480i<br />
480 visible lines, interlaced<br />
480p<br />
480 visible lines, progressive scan<br />
AARA<br />
Automatic Aspect Ratio Adaptation:<br />
algorithm that adapts aspect ratio to<br />
remove horizontal black bars; keeping<br />
up the original aspect ratio<br />
ACI<br />
Automatic Channel Installation:<br />
algorithm that installs <strong>TV</strong> channels<br />
directly from a cable network by<br />
means of a predefined TXT page<br />
ADC<br />
analogue to Digital Converter<br />
AFC<br />
Automatic Frequency Control: control<br />
signal used to tune to the correct<br />
frequency<br />
AGC<br />
Automatic Gain Control: algorithm that<br />
controls the video input of the feature<br />
box<br />
AM<br />
Amplitude Modulation<br />
AUO<br />
Acer Unipack Optronics<br />
AP<br />
Asia Pacific<br />
AR Aspect Ratio: 4 by 3 or 16 by 9<br />
ASD<br />
Automatic Standard Detection<br />
AV<br />
Audio Video<br />
B/G<br />
Monochrome <strong>TV</strong> system. Sound<br />
carrier distance is 5.5 MHz<br />
BTSC<br />
Broadcast Television System<br />
Committee<br />
CAM<br />
Conditional Access Module<br />
CBA<br />
Circuit Board Assembly (or PWB)<br />
CEC<br />
Consumer Electronics Control bus;<br />
remote control bus on HDMI<br />
connections<br />
CI<br />
Common Interface; E.g PCMCIA slot<br />
for a CAM in a set top box<br />
CL<br />
Constant Level: audio output to<br />
connect with an external amplifier<br />
CLUT<br />
Colour Look Up Table<br />
ComPair<br />
Computer aided rePair<br />
COFDM<br />
Coded Orthogonal Frequency Division<br />
Multiplexing; A multiplexing technique<br />
that distributes the data to be<br />
transmitted over many carriers<br />
CSM<br />
Customer Service Mode<br />
CVBS<br />
Composite Video Blanking and<br />
Synchronisation<br />
CVBS-MON<br />
CVBS monitor signal<br />
CVBS-TER-OUT CVBS terrestrial out<br />
CVI<br />
Component Video Input<br />
DAC<br />
Digital to analogue Converter<br />
DBE<br />
Dynamic Bass Enhancement: extra<br />
low frequency amplification<br />
DDC<br />
Display Data Channel; is a part of the<br />
"Plug and Play" feature<br />
DFU<br />
Directions For Use: owner's manual<br />
DNR<br />
Dynamic Noise Reduction<br />
DRAM<br />
Dynamic RAM<br />
DSP<br />
Digital Signal Processing<br />
DST<br />
Dealer Service Tool: special<br />
(European) remote control designed<br />
for service technicians<br />
DTS<br />
Digital Theatre Sound<br />
DVB(T)<br />
Digital Video Broadcast; An MPEG2<br />
based standard for transmitting digital<br />
audio and video. T= Terrestrial<br />
DVD<br />
Digital Versatile Disc<br />
DVI<br />
Digital Visual Interface<br />
DW<br />
Double Window