and engineering support
Overview
The BG-4KBHS is a professional-grade 12G/6G/3G/HD-SDI and HDMI 2.0 bi-directional converter featuring integrated audio embedding and extraction. Designed for uncompromising signal quality and reliability, this converter enables seamless real-time conversion between HDMI and SDI formats without latency or signal loss. Supporting full digital conversion, it maintains uncompressed, lossless video and audio for pristine broadcast performance.
With support for up to 8 audio channels, including 7.1 and 5.1 surround sound, and a high-quality analog stereo embedder and extractor, the BG-4KBHS bridges professional SDI systems with consumer HDMI devices in a single, versatile solution. Its low-jitter SDI output, automatic signal detection, and broad video format support up to 4K@60Hz make it a reliable tool for broadcast studios, post-production, and AV integration environments demanding flexible and high-fidelity signal management.
Features in Depth
The BG-4KBHS delivers real-time, bi-directional conversion between HDMI 2.0 and 12G/6G/3G/HD-SDI formats with zero latency, ensuring broadcast-quality performance across professional and consumer workflows. It supports uncompressed 10-bit 4:2:2 video for exceptional image fidelity and automatically detects SDI signal formats for seamless switching between 12G, 6G, 3G, and HD-SDI. With support for a wide range of HD and UHD resolutions up to 4K@60Hz, the converter ensures full compatibility with modern production and display systems, maintaining lossless video and audio transmission throughout the process.
In addition to high-quality video conversion, the BG-4KBHS integrates audio embedding and extraction, supporting up to 8 digital channels including 7.1 and 5.1 surround sound, along with 2-channel analog stereo I/O. This enables flexible routing of both embedded and external audio without additional hardware. Its low-jitter SDI output provides exceptional signal stability, while advanced re-clocking and equalization technologies allow cable runs up to 300m (HD-SDI) and 70m (12G-SDI) without degradation, making it ideal for broadcast, live production, and post-production environments that demand reliability and precision.
Built on a 6-layer impedance-controlled PCB and enclosed in a durable metal chassis, the BG-4KBHS combines robust design with professional connectivity options, including HDMI Type-A, 75Ω BNC, and 3.5mm audio jacks. The unit supports both internal and external synchronization for flexible integration into time-critical workflows and operates within a wide environmental range for field and studio use. Compact, versatile, and engineered for flawless performance, the BG-4KBHS is a complete solution for bridging SDI and HDMI systems while preserving the full integrity of video and audio signals.
Features
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Supports HD & UHD Formats720p@50/59.94/60Hz, 1080i@50/59.94/60Hz, 1080p@23.97/24/25/29.97/30/50/59.94/60Hz, 4K2K@23.98/24/25/29.97/30/50/59.94/60Hz -
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High Bit Rate SupportHandles SDI bit rates of 270 Mbps up to 11.88 Gbps, including fractional rates for broadcast compatibility -
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Audio Channel SupportSupports up to 8 audio channels, including 7.1 and 5.1 surround sound -
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Analog Stereo Embedder & ExtractorProvides high-quality analog audio embedding and extraction for flexible audio routing -
![SDI TO HDMI | HDMI TO SDI | ADC | DAC | RECHARGEABLE]()
Real-Time Bi-Directional ConversionConverts HDMI to SDI and SDI to HDMI without latency or quality loss -
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Auto SDI DetectionAutomatically detects and switches between 12G, 6G, 3G, and HD-SDI signals
- Video & Audio Integrity: Maintains uncompressed, lossless digital video and audio throughout the conversion process
- Multi-Format Compatibility: Compatible with professional SDI equipment and consumer HDMI devices for versatile workflow integration
- Compact & Rack-Mountable Design: Optimized for studio and field applications requiring space-efficient hardware
- HDMI Support: Fully compatible with HDMI 2.0 and lower versions for flexible source integration
- Low-Jitter SDI Output: Ensures stable and reliable SDI signal transmission for professional video workflows
Tech Specifications
| Technical | |
| SDI Standards | 12G / 6G / 3G / HD-SDI |
| HDMI Standards | HDMI 2.0 |
| Auto SDI Detection | 12G / 6G / 3G / HD-SDI (Auto) |
| Video Bandwidth | SDI: 11.88 Gbps, 11.88/1.001 Gbps HDMI: Up to 18 Gbps |
| Video Support | 12G-SDI: 4K2K @50/59.94/60Hz 6G-SDI: 4K2K @23.98/24, 25, 29.97, 30Hz 3G-SDI: 1080p @50/59.94/60Hz HD-SDI: 720p @50/59.94/60Hz, 1080i @50/59.94/60Hz, 1080p @23.98/24/25/29.97/30Hz HDMI: Up to 4K2K @60Hz |
| Input Signal | 1x SDI, 1x HDMI, 1x Audio |
| Output Signal | 2x HDMI, 1x SDI, 1x Audio |
| Output Impedance (SDI) | 75Ω |
| Synchronization Mode | Internal or External |
| Eye Pattern Characteristics | 12G-SDI: Timing jitter: 0.29 UI, Alignment jitter: 0.13 UI 6G-SDI: Timing jitter: 0.18 UI, Alignment jitter: 0.06 UI 3G-SDI: Timing jitter: 0.09 UI, Alignment jitter: 0.03 UI |
| Cable Equalization | 12G-SDI: up to 70m 6G-SDI: up to 100m 3G-SDI: up to 190m HD-SDI: up to 300m |
| Audio Support | Analog Audio: 2-channel HDMI: Surround Sound (up to 7.1ch) |
| PCB Stack-up | 6-layer board (Impedance control: differential 100Ω; single 50Ω) |
| Connections | |
| Input | 1x BNC (SDI) 1x HDMI 1x Audio Jack |
| Output | 2x HDMI 1x BNC (SDI) 1x Audio Jack |
| BNC Connector | 75Ω inter-locked socket |
| HDMI Connector | Type A (19-pin female) |
| Mechanical | |
| Housing | Metal enclosure |
| Power Supply | +5V DC |
| Operating Temperature | 32 ~ 104°F / 0 ~ 40°C |
| Storage Temperature | -4 ~ 140°F / -20 ~ 60°C |
| Relative Humidity | 20 ~ 90% RH (no condensation) |
Resources
PACKAGE CONTENTS
- 1x BG-4KBHS
- 1x 5V DC Adapter
- 1x Product Manual
Interfaces
- Power LED: Indicates device power status.
- Signal LED: Indicates active video signal detection.
- Stereo Audio Output: Extracts stereo audio from SDI or HDMI input.
- SDI IN: Accepts 12G/6G/3G/HD-SDI video input.
- SDI OUT: Outputs 12G/6G/3G/HD-SDI video.
- Mode Slide Switch:
a. Right: Convert HDMI → SDI
b. Left: Convert SDI → HDMI - Audio/Firmware Slide Switch:
a. Right: F/W update mode
b. Mid: Use HDMI input audio as SDI audio source
c. Left: Use stereo audio input as SDI audio source - USB-C Port: For firmware updates.
- DC Power Input (+5V): Connect to a 5V DC power supply.
- Stereo Audio Input: Embeds stereo audio into SDI output.
- HDMI Loop Out: Pass-through connection for HDMI display monitoring.
- HDMI IN: Connects to an HDMI source (HDMI male-to-male cable).
- HDMI OUT: Connects to an HDMI display (HDMI male-to-male cable).
