HDMI Type D ，俗稱Micro HDMI 是定義為HDMI 1.4版本的，保持hdmi標準的19pin .但是尺寸與微型USB的藉口差不多，尺寸為2.8 mm × 6.4 mm,比mini hdmi (2.42 mm × 10.42 mm)小很多，主要套用在一些小型的移動設備上，如手機，MP4等等。
一端為標準的HDMI插頭，一端為Micro HDMI(D type)手機，目前部份手機有此接口。如：Motorola XT800,Nokia N8 and HTC EVO 4G 。
Pin
Pin定義
1
TMDS Data2 Shield
2
TMDS Data2+
3
TMDS Data2–
4
TMDS Data1 Shield
5
TMDS Data1+
6
TMDS Data1–
7
TMDS Data0 Shield
8
TMDS Data0+
9
TMDS Data0–
10
TMDS Clock Shield
11
TMDS Clock+
12
TMDS Clock–
13
DDC/CEC Ground
14
CEC
15
SCL
16
SDA
17
Reserved (N.C. on device)
18
+5V Power
19
Hot Plug Detect
英文定義：
Digital interface defined around DVI 1.0 that transmits video and audio on the same physical channel.
Interface defined for use in the consumer market space.
Requires separate licensing from that of DDWG’s DVI.
Allows DVI/HDMI products to be sold in consumer products
Supports the use of HDCP copy protection.
Utilizes VESA’s Display Data Channel to read E-EDID from a display.
Defines a different connector from that used on DVI.
Supports optional CEC (Consumer Electronics Control), which allows high level control of all A/V products in a user environment.
DVI 1.0: The Physical Interface
Digital Visual Interface (DVI) was developed by a group called the Digital Display Working Group or DDWG for the PC market.
The interface is a high speed digital serial interface based on Transition Minimized Differential Signaling or TMDS.
Source synchronous architecture. Uses a separate channel to transmit the clock.
Used to provide variable data rates to handle the various VESA supported display resolutions.
A complete connection from the source to the sink devices uses three data channels (RGB/YCbCr) and a clock.
HDMI = DVI + Audio
Using the DVI physical link to transmit video/graphics
Audio is added as a logical layer to the DVI phy.
Digital audio processed into packets of data
These packets are scheduled for transmission during existing horizontal and vertical blanking times within a frame.
In addition, HDMI implements a packet called an infoFrame.
InfoFramesare structures defined in the EIA-861B specification
EIA-861B is spec for DTV and uncompressed high speed digital interfaces.
What is HDMI Data?
There are three categories of data that is transmitted via an HDMI link.
Video Data –Video pixel data (8b data encoded to 10b), and Guard Bands (fixed 10b pattern)
Data Island –Packet data, which can be either audio samples or Infoframes(TERC4 encoded, 4b encoded to 10b) as well as its own Guard Band (fixed 10b pattern).
Control –Control period coding, in which we find HSYNC, VSYNC (2b to 10b encoding) and a Preamble (used to determine whether subsequent data is video or data island)
Transmission of Video/Graphics
HDMI transmits 24bit pixel data via three separate channels.
Pixel rates supported are 25MHz to 165MHz.
This is exactly the same as single link DVI 1.0
Also supports video rates below 25MHz e.g. 13.5MHz for 480i NTSC signals.
Achieves this through a “pixel-repetition”scheme.
Can handle pixel data in RGB, YCbCr(4-4-4), YCbCr(4-2-2) formats.
In all cases 24 bits of data per pixel clock are transmitted.
Transmission of Audio
Basic Audio is provided via an IEC60958 audio stream at 33kHz, 44.1kHz, or 48kHz.
Accommodates any normal stereo audio stream.
Optionally this stream can be sent as a single channel at 192kHz.
Can support IEC61937 compressed formats as found in surround-sound, Dolby Digital, etc. at rates up to 192kHz.
Infoframes and HDMI
EIA/CEA-861B specifies a special packet called an infoframe
HDMI sources and sinks are expected to use two basic infoframes.
AVI (Auxiliary Video Information) Infoframe
Communicates Colorimetry, Picture aspect ratio, Pixel-Repetition factor, RGB or YCbCrindicator, and others specified within 861B standard.
Audio Infoframe
Communicates, Channel count, Coding Type, Sample size, Sample frequency, Channel allocation and other audio specific information.
There are other types of infoframes that are supported by the 861B standard, but are optional with respect to HDMI specification.
hdmi 最完全的解釋