12G-SDI技术规范：SMPTE ST 2082-12解析

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"SMPTE ST 2082-12:2016标准详细阐述了4320线和2160线源图像及辅助数据在四链路12G-SDI（串行数字接口）中的映射方法。这个标准由电影与电视工程师协会（SMPTE）制定，主要关注高分辨率视频信号的传输和处理。" SMPTE ST 2082-12标准是针对专业视频制作和广播领域的重要规范，它定义了如何将各种源图像格式和相关的辅助数据转换并映射到四链路的12Gbps SDI接口中。这个过程的目的是为了高效地传输高清晰度、高帧率的视频信号，例如4K和8K分辨率的视频。在标准中，"四链路12G-SDI"是指利用四个独立的12Gbps通道来承载单个高分辨率视频流，以实现对4320线（8K）和2160线（4K）图像格式的支持。通过这种方式，可以同时传输视频图像、音频数据、时间码以及其它关键的辅助信息。标准分为多个模式，详细说明了各种映射规则： 1. 模式1：主要处理4320线源图像格式和辅助数据的映射。这部分包括了图像的布局、中间子图像的映射、辅助数据如元数据、音频数据和时间码的处理方式，以及填充区域的处理等。 2. 模式2：专注于2160线R'G'B'、Y'C'BC'R 4:4:4(4)10位和4:4:4 12位额外帧率（AFR）源图像格式和辅助数据的映射。这个模式不仅包含了图像的映射，还包括了1080线子图像的映射、定时和参考信号、行编号、行CRC码，以及HANC和VANC数据流的空间分配。标准中还提到了操作级别（Informative），这些级别可能涉及不同工作环境下的兼容性和性能要求，以确保在不同设备间进行无缝的数据交换。 SMPTE ST 2082-12:2016是一个关键的技术规范，它定义了高清视频在四链路12G-SDI系统中的传输标准，对于现代视频制作、后期处理和广播设施来说具有重要意义。这个标准有助于保持视频信号的高质量，同时简化了多通道、高带宽视频系统的集成和互操作性。

SMPTE ST 2082-12: 2016

Page 8 of 42 pages

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 12-2:2014, Transmission of Time Code in the Ancillary Data Space

SMPTE ST 12-3:2016, Time Code for High Frame Rate Signals and Formatting in the Ancillary Data Space

SMPTE ST 299-1:2009, 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface

SMPTE ST 299-2:2010, Extension of the 24-Bit Digital Audio Format to 32 Channels for 3 Gb/s Bit-Serial

Interfaces

SMPTE ST 352:2013, Payload Identification Codes for Serial Digital Interfaces

SMPTE ST 425-5:2015, Image Format and Ancillary Data Mapping for the Quad Link 3 Gb/s Serial Interface

SMPTE ST 2036-1:2014, Ultra High Definition Television — Image Parameter Values for Program Production

SMPTE ST 2048-1:2011, 2048 × 1080 and 4096 × 2160 Digital Cinematography Production Image Formats

FS/709

Amendment 1:2016 to SMPTE ST 2048-1:2011

SMPTE ST 2082-10:2015, 2160-line Source Image and Ancillary Data Mapping for 12G-SDI

4 Mode 1: Carriage of 4320-line Source Image Formats and Ancillary Data

In the case of 4320-line mapping, the image formats supported are defined in Table 1.

Table 1 – Supported Image sample structures and frame rates

Reference

SMPTE

Standard

Image

Format

Signal Format S

ampling

Structure/pixel Depth

Frame Rate

ST 2036-

7680 x 4320

4:2:2 (Y′C′

C′

4:2:0 (Y′C′

C′

)/10-bit

50, 60/1.001 and

Progressive

ST 2036-1

7680 x 4320

4:4:4 (R′G′B′)/10-bit

24/1.001, 24,

25,

30/1.001 and 30

Progressive

ST 2036-1

7680 x 4320

4:4:4 (Y′C′

C′

)/10-bit

ST 2036-1

7680 x 4320

4:4:4 (R′G′B′)/12-bit

ST 2036-1

7680 x 4320

4:4:4 (Y′C′

C′

)/12-bit

ST 2036-

7680 x 4320

4:2:2 (Y′C′

C′

)/12-bit

4:2:0 (Y′C′

C′

)/12-bit

Authorized licensed use limited to: University of Illinois. Downloaded on October 12,2016 at 14:14:04 UTC from IEEE Xplore. Restrictions apply.

SMPTE ST 2082-12:2016

Page 9 of 42 pages

4.1 Mapping

The 4320-line image shall be divided into four 2160-line intermediate sub images in accordance with the 2

sample interleave sub-division method as shown in Figure 3.

For 4:2:0 source images, the 10-bit C′

and C′

samples in intermediate sub images 3 and 4 are set to the

value 200h and the 12-bit C′

and C′

samples in intermediate sub images 3 and 4 are set to the value 800h.

2160-line Intermediate Sub-Image 1

1 1 1 12 2 2 2

3 3 3 34 4 4 4

2-sample interleave division

1 1 1 12 2 2 2

3 3 3 34 4 4 4

1 1 1 12 2 2 2

3 3 3 34 4 4 4

0 3839

2159

2160-line Intermediate Sub-Image 2

0 3839

2159

9 9 9 910 10 10 10

11 11 11 1112 12 12 12

9 9 9 910 10 10 10

11 11 11 1112 12 12 12

9 9 9 910 10 10 10

11 11 11 1112 12 12 12

0 3839

2159

13 13 13 1314 14 14 14

15 15 15 1516 16 16 16

13 13 13 1314 14 14 14

15 15 15 1516 16 16 16

13 13 13 1314 14 14 14

15 15 15 1516 16 16 16

0 3839

2159

5 5 5 56 6 6 6

7 7 7 78 8 8 8

5 5 5 56 6 6 6

7 7 7 78 8 8 8

5 5 5 56 6 6 6

7 7 7 78 8 8 8

4320-line Source Image

1 1

3 3

2 2

4 4

0 7679

4319

5 5 6 6 1 1 2 25 5 6 6

7 7 8 8 3 3 4 47 7 8 8

9 9 9 913 13 13 1310 10 10 1014 14 14 14

11 11 11 1115 15 15 1512 12 12 1216 16 16 16

1 1

3 3

2 2

4 4

5 5 6 6 1 1 2 25 5 6 6

7 7 8 8 3 3 4 47 7 8 8

9 9 9 913 13 13 1310 10 10 1014 14 14 14

11 11 11 1115 15 15 1512 12 12 1216 16 16 16

1 1

3 3

2 2

4 4

5 5 6 6 1 1 2 25 5 6 6

7 7 8 8 3 3 4 47 7 8 8

9 9 9 913 13 13 1310 10 10 1014 14 14 14

11 11 11 1115 15 15 1512 12 12 1216 16 16

2160-line Intermediate Sub-Image 3

2160-line Intermediate Sub-Image 4

Figure 3 – Two sample division of a 4320-line image to four 2160-line intermediate sub images

Each 2160-line intermediate sub image shall then be divided into four 1080-line sub images and mapped to

an 80-bit virtual interface according to SMPTE ST 2082-10 “2160-line Source Image and Ancillary Data

Mapping for 12G-SDI” mode 1 “Carriage of 2160-line Source image formats and ancillary data” as illustrated

in Figure 4.

Intermediate sub image 1 shall be divided to sub images 1 through 4 and mapped to data streams one

through eight.

Intermediate sub image 2 shall be divided to sub images 5 through 8 and mapped to data streams nine

through sixteen.

Authorized licensed use limited to: University of Illinois. Downloaded on October 12,2016 at 14:14:04 UTC from IEEE Xplore. Restrictions apply.

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