AVMatrix SC1221-12G HDMI to SDI Converter 4K
12G-SDI broadcast converter with loop-out
article number: 12729 | manufacturer number: SC1221-12G | EAN/UPC: 6971118002825
The AVMATRIX SC1221-12G delivers professional-grade signal conversion from HDMI2.0 to 12G-SDI for broadcast applications. This compact 4K broadcast converter features one HDMI input and two 12G-SDI outputs, supporting video formats HD/3G/6G/12G-SDI. The converter realizes signal conversion from HDMI to SDI without any delay, making it essential for real-time broadcast workflows where timing is critical.
With dual SDI outputs, the SC1221-12G enables multiple devices to monitor the same picture simultaneously at the back-end. The converter seamlessly handles signal distribution for professional monitoring setups and broadcast chains where reliable signal splitting is required.
The converter features advanced auto-detection technology that seamlessly matches HDMI input to SDI output resolution. It supports a comprehensive range of input and output resolutions, including crystal-clear 4K@60 resolution at 4096×2160 pixels. The system automatically handles various resolution formats from HD 1280×720 through Full HD 1920×1080 up to UHD 4K, ensuring optimal signal quality across different production requirements.
Professional color space handling includes support for YCbCr 4:2:2 10bits across all resolution formats, maintaining broadcast-quality color accuracy throughout the signal conversion process.
The SC1221-12G includes a 4K HDMI loop-out that transmits the 4K HDMI video to an additional display for enhanced monitoring capabilities. This feature allows operators to maintain visual reference on external monitors while simultaneously converting to SDI for broadcast equipment. The dual monitoring approach supports complex production environments where multiple display outputs are essential for different crew members.
The converter maintains full 4K resolution through both the conversion path and the loop-out, ensuring consistent image quality across all connected devices in the signal chain.
Powered by USB Type-C 5V, the converter offers flexible power options suitable for mobile and fixed installations. The USB Type-C connection enables power from power banks, power adapters, or other USB power sources, providing deployment flexibility in various production environments. Additionally, the USB Type-C port supports firmware upgrades and program version checking for ongoing system maintenance.
The compact form factor with dimensions of 107.6×58×19mm and weight of 235g makes the converter highly portable for field production work while maintaining professional broadcast-quality performance.
The converter serves as a universal industry solution across multiple professional applications including live broadcast, medical environments, film production, and conference systems. Its ability to bridge consumer HDMI sources with professional SDI infrastructure makes it valuable for integrating cameras, computers, and other HDMI devices into broadcast workflows.
Professional mounting options include an optional detachable bracket system for permanent installations, while the robust design supports operation in demanding environments with temperature ranges from 0-60°C and humidity tolerance up to 90% non-condensing.
Real product can look different to picture
techn. Specs▲
| HDMI Video Input | HDMI2.0×1 |
|---|---|
| SDI Video Output | HD/3G/6G/12G-SDI×2 |
| HDMI Video Loop Output | HDMI2.0×1 |
| SDI Output Format Support | (1080) 4096×2160: 60/59.94/50 |
| (1080) 3840×2160: 60/59.94/50 | |
| (6G) 4096×2160: 30/29.97/25/24/23.98 | |
| (6G) 3840×2160: 30/29.97/25/24/23.98 | |
| (HD) 1920×1080p: 60/59.94/50/30/29.97/25/24/23.98 | |
| (HD) 1920×1080i: 60/59.94/50 | |
| (HD) 1280×720p: 60/59.94/50/30/29.97/25/24/23.98 | |
| SDI Video Rate | HD/3G/6G/12G-SDI |
| SDI Compliance | SMPTE 259M, SMPTE ST-424M, SMPTE 2081, SMPTE 2082M |
| SMPTE 425M-B, SMPTE 274M, SMPTE 425M | |
| SDI Color Space and Precision | YCbCr 4:2:2 10bits |
| HDMI Input Format | (4K) 4096×2160p: 60/59.94/50/30/29.97/25/24/23.98 |
| (4K) 3840×2160p: 60/59.94/50/30/29.97/25/24/23.98 | |
| (FHD) 1920×1080p: 60/59.94/50/30/29.97/25/24/23.98 | |
| (FHD) 1920×1080i: 60/59.94/50 | |
| (FHD) 1280×720p: 60/59.94/50/30/29.97/25/24/23.98 | |
| (4K) RGB 4:4:4 8bits | |
| (4K) YCbCr 4:4:4 8bits, 10bits, 12bits | |
| HDMI Color Space and Precision | (4K) YCbCr 4:4:4 8bits |
| (4K) YCbCr 4:2:0 8bits, 10bits, 12bits | |
| (FHD) RGB 4:4:4 8bits, 10bits, 12bits | |
| (FHD) YCbCr 4:4:4 8bits, 10bits, 12bits | |
| (FHD) YCbCr 4:2:2 8bits, 10bits, 12bits | |
| (FHD) YCbCr 4:2:0 8bits, 10bits, 12bits | |
| HDMI Compliance | CTA-861-G |
| Power | USB Type-C |
| Power Consumption | 5V/5W(10V 1.5A) |
| Voltage Range | 5V |
| Dimension (L×W×H) | 107×53×19mm |
| Weight | 235g |
| Operating Temperature | 0~40°C |
| Storage Temperature | -20~70°C |
| Relative Humidity | 5%~90% non-condensing |
Questions & Answers▲
What does the AVMatrix SC1221-12G do and what is it used for?
The SC1221-12G is a professional broadcast converter that converts an HDMI 2.0 signal to 12G-SDI. It is used wherever signals from HDMI sources have to be fed into professional SDI-based broadcast chains, such as in control systems, broadcast vans or studio productions.
What maximum resolution and frame rate are supported?
The converter supports Ultra HD resolutions up to 4K at 60 frames per second, specifically up to 4096 x 2160 pixels. In addition, common formats such as HD 1280×720 and Full HD 1920×1080 are automatically recognized and processed.
How many SDI outputs does the SC1221-12G have and which SDI standards are supported?
The device has two SDI outputs and supports the signal standards HD-SDI, 3G-SDI, 6G-SDI and 12G-SDI. Both outputs deliver the same image at the same time, so that several downstream devices can be supplied in parallel.
Can I use both SDI outputs at the same time?
Yes. Both SDI outputs are active and transmit the same video signal simultaneously. This makes it possible to supply two devices with the converted signal at the same time without the need for additional splitters or distributors.
What is the HDMI loop-out and how is it used?
The HDMI loop-out outputs the incoming signal The 4K HDMI signal is passed on unchanged to another monitor or device. This means that the source image can be monitored on an external display at the same time while the conversion to SDI for the broadcast chain is taking place.
Does the converter work without delay?
Yes. Signal conversion from HDMI to SDI occurs without any measurable delay. This is particularly important for real-time broadcast workflows where precise timing and synchrony between image and sound sources are crucial.
What color space and color depth does the device process?
The SC1221-12G supports YCbCr 4:2:2 at 10 bits across all supported resolution formats. This color depth meets the requirements of professional broadcast productions and ensures that color accuracy is maintained throughout the conversion.
Does the device automatically detect the input resolution?
Yes. The converter features automatic detection technology that analyzes the input HDMI signal and adjusts the output resolution accordingly. Manually setting the resolution is usually not necessary.
How is the SC1221-12G powered?
The power is supplied via USB-C. This enables a flexible power supply, for example via standard USB-C power supplies or compatible power banks, which also simplifies use in mobile production environments.
Is the device suitable for mobile use?
Due to its compact housing and the USB-C power supply, the converter is also well suited for mobile production and outdoor use. It can be integrated into suitcase setups or cameras to save space.
Can the converter be used for signal distribution in professional surveillance systems?
Yes. Thanks to the two simultaneous SDI outputs, the SC1221-12G is suitable for broadcast chains and surveillance systems in which the same converted signal must be distributed to multiple receivers or monitors without loss of quality.
[Which HDMI version is at the input supported?
The input supports HDMI 2.0. This standard is required to transmit 4K signals at 60 frames per second and ensures compatibility with modern cameras, computers and other 4K sources.
Is the SC1221-12G compatible with older SDI devices that only support HD-SDI or Support 3G-SDI?
Yes. The converter not only supports 12G-SDI and 6G-SDI, but also the older standards HD-SDI and 3G-SDI. It is therefore backwards compatible and can be used in mixed infrastructures with different equipment.
documents, files, links▲
avmatrix-brochure-sc1221-12g.pdfproduct safety (GPSR)▲