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Any video transmission device with RGB video outputs shall specify the DMTs supported. The product specification shall list compliance to the VESA DMT standard in following way:

VESA [PIXEL FORMAT] @ [REFRSH RATE] & [REFRSH RATE2] & [...

EXAMPLE

VESA 640x480 @ 56 Hz & 72 Hz

VESA VGA @ 56 Hz & 72 Hz

Alternatively, the Pixel Format may be listed as mnemonic.

The video timing parameters for all DMTs declared to be supported by the video transmission device shall be according to the VESA Monitor Timing Specifications (see Industry Standards and Guidelines for Computer Display Monitor Timing (DMT), Version 1.0 Revision 11 or later).

The analogue video signal of the video transmission device, media or combination of both shall be compliant to the Video Signal Standard (VSIS), Version 1, Rev. 2, December 12, 2002 or later. This European Standard establishes the analogue video signal characteristics for today’s video display interfaces.

If a video transmission device does not comply with this European Standard at the minimum pixel clock period, then alternatively a longer pixel clock period may be specified

.

Table 1 - Summary of Display Monitor Timings - Standards and guidelines

Nomenclature for normal and wide screen display modes is far from settled in consumer electronics. The mnemonics in the table below are the most frequently used in industry. The following Table 2 gives the terms defined and required for video devices and video transmission devices in security applications according to this European Standard.

The number of bits used to hold a pixel is called "colour depth" or "pixel depth," the bit depth determines the maximum number of colours that can be displayed at one time. True Colour (16M colours) is required for photorealistic images and video. Most video display outputs support 65K and 16M colours at their highest resolution without noticeable loss of performance in rendering the images.

Table 3

The video transmission device shall declare the colour depth of the video image generation in bits.

The physical connection for a host (video input) and monitor (video output) shall be in accordance with VESA Enhanced Display Data Channel (E-DDC) Standard, v.1.1 (March 24, 2004), pages 17-18.

In addition to the analogue video interfaces defined in 6.2, the video transmission device may offer a high definition output interface. In this case, the requirements defined in this subclause apply.

The video transmission device shall provide support for an uncompressed digital video interface (output) using either Digital Visual Interface (DVI) or High-Definition Multimedia Interface (HDMI).

If the video transmission device includes a DVI output, it shall use a female DVI-D connector, which at a minimum supports the Single Link Transmission Minimized Differential Signalling as defined in the DVI.

If the video transmission device includes an HDMI output and/or output, it shall use a female HDMI connector, which at a minimum supports the Single Link Transmission Minimized Differential Signalling as defined in the HDMI Standard.

The vendor shall indicate if the output of the video transmission device is encrypted using e.g. HDCP. It is recommended not to use HDCP in order to allow further processing of the output signal e.g. mixing, re-encoding, etc.

This following subclauses list the requirements on a video transmission device, transmission media or combinations of both with respect to the scanning formats and colorimetry of the HD interfaces.

Э.5.2.2 Scanning formats for the DVI interface

The scanning systems supported on the DVI or HDMI output of the video transmission device shall include at least one of those identified as mandatory for a source device in EN 62315-1. Other formats listed in EN 62315-1 as optional may also be provided.

Any video format shall be converted to preferred format and aspect ratio of the display device connected to the DVI or HDMI output of the video transmission device. The Enhanced Extended Display Identification Data (E-EDID) Detailed Timing Descriptions or the Timing Extensions structures according to EN 62315-1:2003, Annexes C and D, communicated from the display to the video device via the DVI or HDMI interface may be supported and used.

In the event that the E-EDID data structure or EDID timing extension does not contain a supported timing format or cannot be read, then the DVI or HDMI output shall use 640x480p mode, if available. If 640x480p mode is not supported by the video transmission device then 720x480p mode may be utilized, if available.

9.5.2.3 Video transmission format for the DVI interface

If the video transmission device implements a DVI interface, then the video transmission device shall employ the RGB component format according to the colour encoding, sampling and conversion requirements of EN 62315-1.

If the video transmission device implements an HDMI interface, then the video transmission device shall employ the RGB component format according to the HDMI specification.

If the video transmission device implements an HDMI interface and analogue component interfaces, then the video transmission device shall also support the YCbCr format according to the HDMI specification.

Э.5.2.4 Colorimetry for the DVI Interface

The DVI or HDMI interface on the video transmission device shall employ the colorimetry requirements according to EN 62315-1:2003, Clause 7.

Э.5.2.5 Video outputs

All video of the video transmission device (including on-screen displays and set-up menus) may be output simultaneously to the composite video output, and the DVI or HDMI digital output. In case of a simultaneous display at a composite video and a DVI or HDMI output, there shall be no visible delay between the two outputs.

Note that this may require simultaneous output to interfaces that use different colour spaces (RGB for DVI and YPrPb). Incoming Standard Definition video streams shall be up-converted to support output to the active High Definition output(s).

A.1 Signal A

Annex A
(normative)

Analogue video signal test patterns

Figure A.1 - Signal A: half frame white and black bar signal

A.2 Signal В

Figure A.2 - Signal B: pulse and bar signal

A.3 Signal С

% 100

- 80

• 60

• 40

- 20

-¹ 0

0 4 8 12 18 24 ЗО 36 42 48 50 ps

Figure A.3 - Signal C: frequency burst

A.4 Signal D

Signal D1

<

V

1 .Or-

О.86 -

0,72 -

0,58 L

0,44

0,30 L

' 1 1 I I I :

0 4 8 12 16 20 26 MS

Figure A.4 - Signal D1: grey scale signa

l

1,14

1,0

0,86

0,72

0,58

0,44

0,30

0,16

0 12 18 24 30 36 42 48 50 ps

Signal D2

Figure A.5 - Signal D2: grey scale signal

A.5 Signal F

Figure A.6 - Signal F: 20T pulse

Annex В

(normative)

GAIN ERROR

B.1 Chrominance to luminance amplitude and delay errors

Figure B.1

B.2 The Rosman nomogram

Figure B.2

B.3 Damped low frequency distortion

(A)

(A) is an illustration (as a function of time, field rate) of the input signal to the transmission system. The video signal Kis switched between 10 % APL and 90 % APL. The blanking level В is 0 % reference. The 100 % video signal is 0,7 V_№.

1. Input signal to the transmission system as a function of time, field rate

(B) is an illustration of the amplitude variation of the output signal of the video signal as a function of time. For clarity of the illustration, details of synchronization signals have been excluded.

2. Amplitude variation of the output signal of the video signal as a function of time

Key

В blanking level

О amplitude of the overshoot

S bottom of the synchronization signal

T settling time of the overshoot or oscillation

V video signal

Figure B.3

B.4 2T waveform mask

Figure B.4

Bibliography

1. ITU-R Recommandation ВТ.601-5, Studio encoding parameters of digital television for standard 4:3 and widescreen 16:9 aspect ratios

2. Digital Display Working Group, Digital Visual Interface - DVI, Revision 1.0 (April 2, 1999) (http://www.ddwg.org)

3. Digital Display Working Group, DDWG Specifications (http://www.ddwg.org)

4. HDMI - High-Definition Multimedia, HDMI Licensing, LLC,

HDMI - High-Definition Multimedia Interface Specification, Version 1.3a, HDMI Licensing LLC (http://www.hdmi.org)

5. VESA DDC/CI Standard, Display Data Channel Command Interface (DDC/CI) Standard, Version 1.1 (October 2004)

6. VESA E-EDIDtm Implementation Guide, Enhanced Extended Display Identification Data Implementation Guide, Version 1 for EDID 1.3 (June 4, 2001)

7. VESA GTF Standard, Generalized Timing Formula (GTF), Version 1.1 (September 2, 1999)

8. VESA, DisplayPort Interoperability Guideline, Version 1.1a (February 5, 2009)

9. VESA Standards

Video Electronics Standards Association, 920 Hillview Court, Suite 140, Milpitas, CA 95035, USA; telephone: (408)-957-9277; (http://www.vesa.org)