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HDMI

 High-definition Multimedia Interface (English: High Definition Multimedia Interface, HDMI for short) is a kind of fully digital images and sound to send Interface, can send uncompressed audio and video signal.HDMI can be used to set-top boxes, DVD players, personal computers, TV game, comprehensive expansion machine, digital stereo and the TV and other equipment.HDMI can send video and audio signals at the same time, because the video and audio signals using the same cable, greatly simplifies the system line installation is difficult.
HDMI is designed to replace the older analog video send interface such as SCART or RCA terminal.It supports all kinds of television and computer image formats, including SDTV, HDTV video screen, plus multichannel digital audio.When sending, all kinds of video data will be HDMI transceiver chip to minimize transmission differential signal "(TMDS) technology into data packets.Early specifications developed with its largest rate is 165 pixels MPX/SEC, enough to support 1080 p quality 60 pictures per second, or UXGA resolution (1600 x);Later in the HDMI 1.3 specification amplification of 340 MPX/second, to meet future demand.
HDMI also support the compression 8 channel Digital audio sent (192 KHZ sampling rate and data length 24 bits per sample), and any compressed audio stream such as Dolby * Digital and DTS, also support SACD used by 8 channel 1 bit DSD signal.In the HDMI 1.3 specification, and adding the high volume of compressed audio stream such as Dolby * TrueHD and DTS - HD support.
Standard Type A HDMI connection has 19 feet, another to support higher resolution Type B connector is defined, but there is still no any vendor using the Type B connectors.Type B connection has 29 feet, allow its video channel to send and expansion to meet future demand for high quality, such as WQSXGA (3200 x2048).
Type A HDMI can be compatible with the current down most of the display screen and graphics card used by Single - link DVI - D or DVI - I interface (but not support DVI - A), that means the DVI - D interface signal source can be converted into line drive through HDMI screen, but such A transformation scheme does not support audio sent with remote control function.In addition, if no HDCP authentication DVI screen will not be able to watch from the HDMI output video data with HDCP encryption protection.(all HDMI screen support HDCP, but most of the DVI interface display does not support HDCP.)Type B HDMI connection will be backwards compatible in the Dual - link DVI interface.
HDMI sponsors include major consumer electronics manufacturers, such as Hitachi, panasonic, Quasar, RCA, Toshiba, philips, SONY, Thompson Silicon Image.Digital Content Protection company (Digital Content Protection, LLC) [1] provide HDMI interface related copy Protection technology.HDMI, moreover, has also been the major film studios, such as the 20th century fox, Warner Brothers, Disney, major consumer electronics products, including samsung electronics manufacturers, as well as the support of several cable system operators.

The high definition multimedia interface (HDMI)


HDMIFormal trademark

kind

Digital image/sound connection head

History of the product

projector

HDMI organization

Design Date

In December 2002.

Year of manufacture

Since 2003

standard

hot plug

yes

circumscribed

yes

Sound frequency

PCM,DVD-Audio,Super Audio CD,Dolby TrueHD,DTS Master Audio

Sound frequency

480,576,720,or 1080 (progressive or interlaced video).

 

DATA WIDTH

10.2 Gbps at 340 Mhz

cabled yarn

5 meters max.

A number of foot

19

Foot a configuration


Type A (Receptacle) HDMI

Foot 1

TMDS Data2+

 

Foot 2

TMDS Data2 Shield

 

Foot 3

TMDS Data2–

 

Foot 4

TMDS Data1+

 

Foot 5

TMDS Data1 Shield

 

Foot 6

TMDS Data1–

 

Foot 7

TMDS Data0+

 

Foot 8

TMDS Data0 Shield

 

Foot 9

TMDS Data0–

 

Foot 10

TMDS Clock+

 

Foot 11

TMDS Clock Shield

 

Foot 12

TMDS Clock–

 

Foot 13

CEC

 

Foot 14

Reserved (N.C. on device)

 

Foot 15

SCL

 

Foot 16

SDA

 

Foot 17

DDC/CEC Ground

 

Foot 18

+5 V Power

 

Foot 19

Hot Plug Detect

 

standard

HDMI transmission line

The HDMI specification specified in the four HDMI inputs, respectively is:
• HDMI A Type
• Applied to HDMI1.0 version, a total of 19 pin, specifications for the 4.45 mm x 13.9 mm, for the most common type of HDMI connector specifications, the relatively equal to DVI Single - Link transmission.Before the HDMI 1.2 a, best can deliver 165 MHz TMDS, so the maximum transmission specification is only 1600 x 162.0 MHz (TMDS).
• HDMI B Type
• applied to HDMI1.0 version, the specification is 4.45 mm x 21.2 mm, A total of 29 pin, can transmit HDMI twice as A type of TMDS data volume, relative to DVI Dual - Link transmission, used to transmit high resolution (more than 2560 x1600 WQXGA).(because the HDMI type is only A Single - TMDS transmission Link, if you want to transfer into HDMI type B signal, it must be to double transmission efficiency, causes the working frequency of the Tx and Rx TMDS must raise to more than 270 MHZ. In HDMI 1.3 IC before, on the market most of the TMDS Tx and Rx can only work stable below 165 MHZ.)This interface is not used in any product.

• HDMI C Type

The mini - HDMI video card
• commonly known as the mini - HDMI, applied to HDMI1.3 version, A total of 19 pin, can say is A smaller version of HDMI A type, size of 2.42 mm x 10.42 mm, but the foot A defined change.Mainly used in portable devices, for example, DV, digital camera, portable multimedia player, etc.Due to the limitation of size, some graphics CARDS will use the mini - HDMI, with home must use adapter into A standard Type, the size of A connection screen again.
• HDMI D Type
Applied to HDMI1.4 versions, a total of 19 pin, specifications for the 2.8 mm x 6.4 mm, but the foot a defined change.New Micro HDMI interface will be smaller than now 19 needle version MINI HDMI interface around 50%, highest can bring cameras, mobile phones and other portable equipment support 1080 p resolution and the fastest transmission speed of 5 gb.

TMDS channel
•send audio, video, and various kinds of secondary data
Signal encoding: follow the DVI 1.0 specifications.Single - link (Type A HDMI) or dual cc-link HDMI (Type B).
Video pixel bandwidth: from 25 MHz to 340 MHz (Type A, HDMI 1.3) or to 680 MHz (Type B). Lower than 25 MHz bandwidth as NTSC video signal 480 I will take the way of frequency doubling output.Each pixel of the allowable amount of data from 24 to 48.Support 1080 p resolution 120 copies per picture sent and WQSXGA resolution [1].
• pixel encoding: RGB 4:4:4, YCbCr 4:4:4 (8-16 bits per component);YCbCr 4:2:2 (12 bits per component);YCbCr 4:2:0 (HDMI 2.0)
• audio sample rate: 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 1536 kHz (HDMI 2.0).
• audio track number: maximum 8 channels.HDMI 2.0 supports 32 channels.
• Audio stream specification: IEC61937 compatible flow, including high traffic condition signals such as Dolby * TrueHD, DTS - HD Master Audio


DDC The channel

• DDC full text for Display Data Channel
, the sender and the receiver can use DDC channel of sending and receiving ability, to each other but only one-way HDMI learn the ability of the receiver (screen).
Use 100 KHZ, clock frequency of I C squared signal
• send data structure for the VESA Enhanced EDID (V1.3).
CEC channel (must set aside the line but can not implemented)
The full text, CEC for Consumer Electronics Control
, used to send industrial specifications of AV signal Link agreement, in order to support more than a single remote control machine AV
For single core bidirectional serial bus
• formulation in the HDMI 1.0 protocol, in the 1.2 a version update
Some manufacturers may use the HDMI CEC, but may use different name to represent the CEC features
1. Samsung - AnyNet+
2. Sharp - Aquos Link
3. Sony - BRAVIA Link and BRAVIA Sync
4. Hitachi - HDMI-CEC
5. AOC - E-Link
6. Pioneer - Kuro Link
7. Toshiba - CE-Link and Regza Link
8. Onkyo - RIHD (Remote Interactive over HDMI)
9. LG - SimpLink
10. Panasonic - HDAVI Control, EZ-Sync, VIERA Link
11. Philips - EasyLink

Copy mechanism
• support HDCP specification version 1.10
Version evolution
HDMI 1.1/1.2
HDMI 1.1
In May 2004
• support DVD Audio. -
HDMI 1.2
In August 2005
• support 8 channel 1 bit audio user (SACD)
, let the PC - source can use HDMI Type A connector
Maintaining open CE in YCbCr color domain under the premise, the PC - source using native RGB color gamut
• support HDMI 1.2 + screen required low voltage - source
HDMI 1.2 a
In December 2005
Completely established the function of the CEC channel, instruction set, and the compatibility test program

HDMI 1.3
On June 22, 2006 [2]
Amplification, single - the bandwidth of the link mode to 340 Mhz (10.2 Gbps data sending rate)
, from 24 bit color gamut (16.77 million colors) to expand support to 30 - bit, 36 - bit, and 48 - bit (RGB) or YCbCr color gamut (the equivalent of more than billion color display)
• support new xvYCC color standard
Support automatic speech synchronization (lines to mouth) function
• support Dolby * TrueHD and DTS HD Master Audio signal output to the external decoder [3] if players have the ability to directly to the two kinds of signal decoding, does not support HDMI 1.3, because all the HDMI specification can send uncompressed Audio signal.
, puts forward new miniaturization joint to support portable camera [4]
• Sony PlayStation 3 is the first listed HDMI 1.3 player.
• Sony BRAVIA KDL - 46 the x2500, KDL - 40 the x2500 is the first listed HDMI 1.3 screen. (1080 p support new xvYCC color standard, 36 bits deep color)
, EPSON EMP - TW1000 is the first listed HDMI 1.3 projector (30 - bit deep color)

HDMI 1.3a
On November 10, 2006
• modify the Cable and Sink HDMI C Type connector
• Source termination recommendation
. Remove the rise time (rise time) and falling time (losing time) of maximum and minimum limit
, change the CEC capacity limit
Quantitative range, clarify the RGB images
• increased CEC instruction about time and sound control
Released at the same time, the certification test specification documents

HDMI 1.3b
On March 26, 2007
, mainly modified HDMI test specification (HDMI Testing specification), and the HDMI specification is still a HDMI 1.3 a.So first appeared at the time of the main HDMI Specification and test Specification (HDMI Testing Specification) is a different version of the case.
• 1.3b 2007/03/26 Modifications to TE overview and policy description (4.1)
• Addition of Agilent TDR to Recommended TE (4.2.1.11)
• Clarification of tentative cable emulators (4.2.1.17)
• Jitter tolerance test changes (8-7)
• Added cable tests for TMDS_CLOCK channel (5-3)
• New VL triggering (7-2)
• Editorial and clarifications on CEC Line Degradation (7-15, 8-14)
• Added testing of additional source-supported Deep Color formats (7-34)
• Additional HDMI VSDB EDID checks (8-3)
• Additional TTC usage (5-3, 8-5, 8-6, 8-7)
• Incorporated Tek-recommended setup and calibration for TDR (8-8)
• Clarification on Sink Deep Color Recommended Test Method (8-25)
• Added long cable or cable emulator use for Repeater test (9-3)
• Added color-depths for each format in Source_Video_Formats (App. 3)
• Removed test for filler bytes (8-3)
• Removed Tektronix part number of cable emulator EFF-HDMI-CE-01

HDMI 1.3b1
On August 1, 2007
• only fixed on the connector Type C holder in the test equipment (fixture) slightly
HDMI 1.3 c
On July 25, 2008
B, 1.3, and 1.3 b1 is the same for 1.3 a testing standards
, and the previous version of the main difference for wire rod test (increase wire test items or modify the content helps to HDMI equipment interconnection compatibility)
• Also have part of the changes associated with the repeater and CEC

HDMI 1.4
On May 28, 2009
• Correlates of new HDMI Ethernet channel, allowing the HDMI equipment based on the Internet and other HDMI equipment sharing Internet access, without the other connect an Ethernet cable.
• New audio feedback channel, let high-definition TV via HDMI audio directly transmitted to the A/V receiver on power amplifier.
• define a generic 3 d format and resolution.Implementation of a standardized home 3 d system input and output section, the highest support two 1080 p resolution video streaming.
• highest support 4 k x 2 k (3840 x 2160 p @ 24 Hz / 25 Hz / 30 Hz or 4096 x 2160 p @ 24 Hz)
Support for color space, color space designed for digital cameras, including sYCC601, Adobe RGB, AdobeYCC601, can be connected in a digital camera shows more accurate vivid colour.
, a new Micro HDMI mini interface, a new Micro HDMI interface will be about 50% smaller than now 19 needle common interface.
Support auto connection system, a designed for car hd content transmission cable specification, can avoid heat, vibration, the influence of common environment, such as car interior noise as well as automobile manufacturers in the car transfer hd content provides a feasible solution.[2]

HDMI 1.4a
On March 4, 2010
• new Top - and - Bottom (Top and Bottom) format
, two sets of new applied in broadcasting system of compulsory standard 3 d transmission format
• Side - by - Side Horizontal level (concurrent)
• Top - and - Bottom (Top and Bottom)
Define mandatory radio, games, movies, 3 d standard
• HDMI 1.4 a standard requirements
Frame encapsulation level, a 3 d display equipment shall be 50, 720 p @ 24 720 p or 1080 p @ @ 60, 1080 p @ 24
• Side - by - Side Horizontal I @ 1080 50 or 1080 I @ 60
• top - and - bottom of about 50, 720 p @ 24 720 p or 1080 p @ @ 60, 1080 p @ 24

HDMI 1.4b
On October 11, 2011
• support 3 d 1080 p 120 hz
HDMI 2.0
On September 4, 2013
New 2160 p @ $50, $2160 p @ 60 (4 k resolution)
• support any longer than understanding
• 32 channel, 4 set of audio stream
• transmission bandwidth 18 gbit/s
Wire compatible HDMI 1.4 (does not define a new cable and connectors)
• support CEC extension
• support double-picture
• dynamic sound automatic synchronization

The length of the constraints
HDMI cable length limit is one of the main problems, in the return of some consumers to test standard of 28 awg (American Wire the Gauge, measure the cable) specification HDMI Wire around the start signal attenuation after more than 5 m.The length is usually not enough to satisfy the projector connected to the computer.
But HDMI organization web page does not recognize the restriction, the web q&a set of HDMI FAQ page records: "we've seen a cable in the absence of the" adapter "by not less than 10 meters HDMI standard cable" "test".
Existing through HDMI certification of 10 m cable (not use HDMI equalizer IC), mostly using 24 awg wire to make.
Some reports pointed out that increasing the diameter of the copper wire in the cable to reduce impedance, is one of the ways to effectively extend the length of the cable.But there are also reports that 24 awg sizes of 28 awg cable performance is good.Also someone USES optical fiber or two CAT - 5 network cable to replace the standard HDMI copper wire.Some manufacturers also produce HDMI signal enhancer in response to the needs of users.
Existing single HDMI equalizer IC, 24 awg HDMI cable can make the best use of length of 50 meters.If you have to provide enough and clean power, can also be concatenated again.
Version of the contrast
Note: certain types of optional HDMI cable support HDMI version of specific technical specification.Such as Deep Color and xvYCC as optional support technology.

HDMI versions

1.0–1.2a

1.3

1.4 [3]

2.0

The maximum signal video bandwidth(MHz)

165

340

340 [5]

600

The biggest TMDS bandwidth(Gbit/s)

4.95

10.2

10.2

18

The biggest audio bandwidth(Gbit/s)

3.96

8.16

8.16

14.4

The biggest audio bandwidth (Mbit/s)

36.86

36.86

36.86

49.152 (IEC61937以及DST audio)

The largest color depth (bit/px)

24

48

48

48

24-bit/px HDMISingle channel maximum resolution

1920×1200p 60 Hz

2560×1600p 75 Hz

4096×2160p 24 Hz

3840×2160p 60 Hz

30-bit/px HDMISingle channel maximum resolution

Not Applicable

2560×1600p 60 Hz

3840×2160p 30 Hz

3840×2160p 60 Hz

36-bit/px HDMISingle channel maximum resolution

Not Applicable

1920×1200p 75 Hz

3840×2160p 25 Hz

3840×2160p 50 Hz

48-bit/px HDMISingle channel maximum resolution

Not Applicable

1920×1200p 60 Hz

3840×2160p 24 Hz

3840×2160p 30 Hz



HDMI versions

1

1.1

1.2

1.3

1.3a

1.4[6]

2.0

1.2a

1.3b

1.3b1

1.3c

sRGB

YES

YES

YES

YES

YES

YES

YES

YCbCr

YES

YES

YES

YES

YES

YES

YES

8 channel LPCM, 192 kHz, 24 bit audio transmission

YES

YES

YES

YES

YES

YES

YES

Blu-ray Disc audio video resolution support

YES

YES

YES

YES

YES

YES

YES

CEC

YES

YES

YES

YES

YES

YES

YES

 DVD-Audio Support

NO

YES

YES

YES

YES

YES

YES

Super Audio CD (DSD) Support

NO

NO

NO

YES

YES

YES

YES

Deep Color DEEP COLOR

NO

NO

NO

YES

YES

YES

YES

xvYCC

NO

NO

NO

YES

YES

YES

YES

Auto Lip Sync

NO

NO

NO

YES

YES

YES

YES

Dolby TrueHD

NO

NO

NO

YES

YES

YES

YES

DTS-HD Master Audio 

NO

NO

NO

YES

YES

YES

YES

CECCommand list update

NO

NO

NO

NO

YES

YES

YES

Ethernet channel

NO

NO

NO

NO

NO

YES

YES

The organiser audio channel

NO

NO

NO

NO

NO

YES

YES

HDMI 3Dfunction

NO

NO

NO

NO

NO

YES

YES

4K×2KResolution support

NO

NO

NO

NO

NO

YES

YES

4K@50/60 Hz

NO

NO

NO

NO

NO

NO

YES

CECextend

NO

NO

NO

NO

NO

NO

YES

PBP

NO

NO

NO

NO

NO

NO

YES

Four audio stream

NO

NO

NO

NO

NO

NO

YES

32 audio channel

NO

NO

NO

NO

NO

NO

YES

1536 kHz audio sampling

NO

NO

NO

NO

NO

NO

YES

21:9 aspect ratio

NO

NO

NO

NO

NO

NO

YES

Sound dynamic automatic synchronization

NO

NO

NO

NO

NO

NO

YES


copyright
Login trademark of HDMI is HDMI Licensing, LLC.Use the HDMI specification need to pay the royalties.Royalties are divided into annual dues, and product sales costs.
• year membership fee: use HDMI companies paid $10000 a year (before July 2006 annual fee is us $15000)
, the product sale cost: use the HDMI specification products for $0.15, if the product have HDMI markers are $0.05 discount, if the product contains HDCP protection agreement to a $0.04 discount.
Product sales fee calculated at the end product for the unit.For example a HDMI cable to charge $0.15, and a TV set makers took the lead with HDMI port of TV bundling is only a $0.15.

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