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《SMPTE ST2081技术标准详解》 SMPTE ST2081，全称为Society of Motion Picture and Television Engineers (电影与电视工程学会)制定的2081系列技术标准，是针对高清视频传输的重要规范，特别是6G-SDI（6 Gigabit Serial Digital Interface）接口协议。这一标准的发布，标志着4K超高清视频在专业领域的应用迈出了坚实一步。 6G-SDI是一种高速串行数字接口，能够支持最高达30 bit/s的无压缩视频数据传输，足以承载4K分辨率（3840x2160或4096x2160）的视频流。相较于传统的HD-SDI（1.5Gbps）和3G-SDI（3Gbps），6G-SDI的出现极大地提升了视频传输的速度和质量，为4K内容制作、编辑和播放提供了可能。 SMPTE ST2081标准主要包括以下几个方面的详细规定： 1. **信号格式**：定义了不同分辨率和帧率的视频信号格式，如4K UHDTV (3840x2160) 和4K DCI (4096x2160)，以及相应的像素时钟频率和行、场、帧速率。 2. **数据编码**：采用10位线性Y'CbCr色彩空间，确保高动态范围和宽色域的视频表现，提供更丰富的色彩层次和细节。 3. **同步信号**：规定了时钟恢复和帧同步信号的生成方式，保证视频信号在传输过程中的稳定性，减少失步和图像抖动。 4. **错误检测与保护**：包括CRC校验和前向纠错（FEC）机制，用于检测并修复传输过程中的错误，提高数据的可靠性。 5. **物理接口**：详细描述了6G-SDI接口的电气特性，包括电缆规格、连接器类型以及信号的电气参数，如电压、电流和阻抗，以确保信号传输的高质量和远距离传输能力。 6. **兼容性**：ST2081标准还考虑了与现有SDI系统的兼容性，使得设备升级到6G-SDI变得更加平滑，降低了行业的升级成本。文件“ST 2081-1.pdf”和“OV 2081-0.pdf”很可能是SMPTE官方发布的详细技术文档，包含了ST2081标准的完整内容和相关的技术指南。通过深入阅读这些文档，可以获取更多关于6G-SDI接口的具体实施细节和技术要求。 SMPTE ST2081标准对于推动4K视频技术的发展具有里程碑式的意义。它不仅提升了视频传输的质量和效率，也为视频制作和播放设备的设计与制造提供了统一的标准，从而加速了4K视频内容的普及和应用。随着技术的不断进步，SMPTE ST2081将为未来的8K甚至更高分辨率的视频传输奠定坚实的基础。

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SMPTE-2081.zip （2个子文件）

ST 2081-1.pdf 389KB

OV 2081-0.pdf 301KB

MOTION PICTURE AND TELEVISION ENGINEERS

3 Barker Avenue, White Plains, NY 10601

(914) 761-1100

Approved

February 4, 2015

SMPTE ST 2081-1:2015

SMPTE STANDARD

6 Gb/s Signal/Data Serial

Interface — Electrical

Table of Contents Page

Foreword.................................................................................................................................................. 2

Intellectual Property ................................................................................................................................. 2

Introduction .............................................................................................................................................. 2

1 Scope.................................................................................................................................................. 3

2 Conformance Notation ........................................................................................................................ 3

3 Normative References ........................................................................................................................ 3

4 Source Data ........................................................................................................................................ 4

Sync-Bit Insertion ...................................................................................................................... 6 4.1

Channel Coding and Serialization ............................................................................................. 7 4.2

5 Coaxial Cable Interface ....................................................................................................................... 8

Generator Signal Levels and Specifications.............................................................................. 8 5.1

Receiver Signal Levels and Specifications................................................................................ 9 5.2

Return Loss ............................................................................................................................... 9 5.3

6 Connector and Cable Types ............................................................................................................... 10

BNC connectors ........................................................................................................................ 10 6.1

Cables........................................................................................................................................ 10 6.2

Annex A Bibliography (Informative) ...................................................................................................... 11

Annex B Channel Coding (Informative) ................................................................................................ 12

Annex C Pot-Hole Pathological and the Sync-Bit Insertion Process (Informative) .............................. 13

Page 1 of 14 pages

Authorized licensed use limited to: Stanford University. Downloaded on November 10,2015 at 14:30:46 UTC from IEEE Xplore. Restrictions apply.

SMPTE ST 2081-1: 2015

Page 2 of 14 pages

Foreword

SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recognized standards

developing organization. Headquartered and incorporated in the United States of America, SMPTE has

members in over 80 countries on six continents. SMPTE’s Engineering Documents, including Standards,

Recommended Practices, and Engineering Guidelines, are prepared by SMPTE’s Technology Committees.

Participation in these Committees is open to all with a bona fide interest in their work. SMPTE cooperates

closely with other standards-developing organizations, including ISO, IEC and ITU.

SMPTE Engineering Documents are drafted in accordance with the rules given in its Standards Operation

Manual.

SMPTE ST 2081-1 was prepared by Technology Committee 32NF.

Intellectual Property

At the time of publication no notice had been received by SMPTE claiming patent rights essential to the

implementation of this Standard. However, attention is drawn to the possibility that some of the elements of

this document may be the subject of patent rights. SMPTE shall not be held responsible for identifying any

or all such patent rights.

Introduction

This section is entirely informative and does not form an integral part of this Engineering Document.

SMPTE ST 2081-1 defines a bit-serial data interface for the transport of 6 Gb/s [nominal] component digital

signals or packetized data. The mapping of various source image formats to the bit-serial data structure

defined here in this document are described in additional SMPTE ST 2081 document parts.

SMPTE ST 2081-0 contains an informative roadmap for the 6 Gb/s Signal/Data Serial Interfaces.

End users are cautioned that they should work with Serial Digital Interface equipment vendors to ensure

the electrical and mechanical capabilities of cables and connectors - whether existing or new – designed in

support of this interface meet their requirements.

Authorized licensed use limited to: Stanford University. Downloaded on November 10,2015 at 14:30:46 UTC from IEEE Xplore. Restrictions apply.

SMPTE ST 2081-1: 2015

Page 3 of 14 pages

1 Scope

This standard describes the electrical and physical characteristics of a 6 Gb/s coaxial cable interface

suitable for applications where the signal loss does not exceed an amount specified by the receiver

manufacturer. Typical loss amounts would be in the range of up to 40 dB at one-half the clock frequency.

2 Conformance Notation

Normative text is text that describes elements of the design that are indispensable or contains the

conformance language keywords: "shall", "should", or "may". Informative text is text that is potentially

helpful to the user, but not indispensable, and can be removed, changed, or added editorially without

affecting interoperability. Informative text does not contain any conformance keywords.

All text in this document is, by default, normative, except: the Introduction, any section explicitly labeled as

"Informative" or individual paragraphs that start with "Note:”

The keywords "shall" and "shall not" indicate requirements strictly to be followed in order to conform to the

document and from which no deviation is permitted.

The keywords, "should" and "should not" indicate that, among several possibilities, one is recommended as

particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred

but not necessarily required; or that (in the negative form) a certain possibility or course of action is

deprecated but not prohibited.

The keywords "may" and "need not" indicate courses of action permissible within the limits of the document.

The keyword “reserved” indicates a provision that is not defined at this time, shall not be used, and may be

defined in the future. The keyword “forbidden” indicates “reserved” and in addition indicates that the

provision will never be defined in the future.

A conformant implementation according to this document is one that includes all mandatory provisions

("shall") and, if implemented, all recommended provisions ("should") as described. A conformant

implementation need not implement optional provisions ("may") and need not implement them as described.

Unless otherwise specified, the order of precedence of the types of normative information in this document

shall be as follows: Normative prose shall be the authoritative definition; Tables shall be next; followed by

formal languages; then figures; and then any other language forms.

3 Normative References

The following standards contain provisions that, through reference in this text, constitute provisions of this

standard. At the time of publication, the editions indicated were valid. All standards are subject to revision,

and parties to agreements based on this standard are encouraged to investigate the possibility of applying

the most recent edition of the standards indicated below.

SMPTE ST 2081-10:2015, 2160-Line and 1080-Line Source Image and Ancillary Data Mapping for Single-

Link 6G-SDI

SMPTE RP 184:2004, Specification of Jitter in Bit Serial Digital Systems

IEC 61169-8 (2007-2), Radio-Frequency Connectors — Part 8: Sectional Specification — R.F. Coaxial

Connectors with Inner Diameter of Outer Conductor 6,5 mm (0,256 in) with Bayonet Lock — Characteristic

Authorized licensed use limited to: Stanford University. Downloaded on November 10,2015 at 14:30:46 UTC from IEEE Xplore. Restrictions apply.

SMPTE ST 2081-1: 2015

Page 4 of 14 pages

Impedance 50 Ω (Type BNC), Annex A (Normative) Information for Interface Dimensions of 75 Ω

Characteristic Impedance Connector with Unspecified Reflection Factor

IEC 61169-29 (2005-6), Radio-Frequency Connectors — Part 29: Sectional Specification — Miniature

Radio Frequency Coaxial Connectors Model Screw, Snap-on, Push-pull or Quick-lock, Slide-in (Rack and

Panel Applications) — Characteristic Impedance 50 Ω (type 1,0/2,3) — 50 Ω and 75 Ω Applications

4 Source Data

For this interface, the source data shall be the 6G-SDI 10-bit Multiplex as defined for example in SMPTE

ST 2081-10, of the form illustrated in the diagram of Figure 1 or Figure 2, having an interface frequency of

594 MHz or 594/1.001 MHz.

Note:

Figure 1 shows the Type 1 10-bit multiplex resulting from mapping modes in which each data stream has a

single instance of TRS words, Line Numbers, CRC Words, etc.

Figure 2 shows the Type 2 10-bit multiplex resulting from mapping modes in which each data stream has two

instances of TRS words, Line Numbers, CRC Words, etc. A Type 2 multiplex is the result of SMPTE ST 292-1

mapping of each sub image. It is generated for 4:2:2 10-bit formats with frame rates of 30 fps or less.

Please note that the title of this normative reference could be misleading. This standard requires the use of the

75-ohm connector defined in Annex A of this reference.

Please note that this reference is required ONLY to provide mechanical dimensions of 75 ohm connectors.

Authorized licensed use limited to: Stanford University. Downloaded on November 10,2015 at 14:30:46 UTC from IEEE Xplore. Restrictions apply.

SMPTE ST 2081-1: 2015

Page 5 of 14 pages

6G-SDI 10-bit multiplex

Data Stream one

148.5 MHz or

148.5/1.001MHz

Data Stream two

148.5 MHz or

148.5/1.001MHz

Data Stream three

148.5 MHz or

148.5/1.001MHz

Data Stream four

148.5 MHz or

148.5/1.001MHz

40-bit Virtual Interface

EAV 3FF

EAV 000

LN1

CRC0

CRC1

EAV XYZ

Blanking Code Words or Optional Ancillary

Data

SAV 3FF

SAV 000

SAV XYZ

Digital Active Line

EAV 3FF

EAV 000

LN1

CRC0

CRC1

EAV XYZ

Blanking Code Words or Optional Ancillary

Data

SAV 3FF

SAV 000

SAV XYZ

Digital Active Line

EAV 3FF

EAV 000

LN1

CRC0

CRC1

EAV XYZ

Blanking Code Words or Optional Ancillary

Data

SAV 3FF

SAV 000

SAV XYZ

Digital Active Line

EAV 3FF

EAV 000

LN1

CRC0

CRC1

EAV XYZ

Blanking Code Words or Optional Ancillary

Data

SAV 3FF

SAV 000

SAV XYZ

Digital Active Line

LN0LN0LN0LN0

EAV 3FF

EAV 000

EAV XYZ

LN1

Data Stream four

Data Stream two

Data Stream three

Data Stream one

LN0

6Gb/s SDI 10-bit interface

594 MHz or 594/1.001MHz

Figure 1 – 6 Gb/s 10-bit Multiplex – Type 1

Authorized licensed use limited to: Stanford University. Downloaded on November 10,2015 at 14:30:46 UTC from IEEE Xplore. Restrictions apply.

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