HD1080 SDI/HDMI Low-Latency COFDM Board

Overview

The HD1080-SDI-HDMI Low-Latency Series is an OEM-grade COFDM video transmission board pair — separate transmitter and receiver modules designed for direct integration into larger systems. Unlike boxed wireless video products, these bare boards give system integrators, robotics engineers, and surveillance OEMs the flexibility to embed professional-grade HD video links into their own enclosures, gimbals, and vehicle platforms.

The transmitter accepts both digital SDI and HDMI video sources, encodes them in H.264 at up to 1920x1080 resolution, and transmits via COFDM modulation across an exceptionally wide tuning range of 180MHz to 2000MHz. The companion receiver demodulates the signal, outputs HDMI at full HD1080P@60Hz, and uses dual-antenna spatial diversity reception to maintain link quality in challenging RF environments. End-to-end latency is a consistent 100ms — fast enough for live viewing and many remote-control applications without the complexity of sub-frame video processing.

Key Features

• OEM board form factor: Bare PCB modules — transmitter 90x55x20mm, receiver 90x55x15mm — for direct integration into drones, vehicles, surveillance housings, and custom equipment.
• SDI and HDMI input: Accepts both professional SDI and consumer HDMI sources on the transmitter, with SDI loop-through output for local monitoring. The receiver outputs HDMI for connection to any display or DVR.
• Full HD1080P H.264: Standard H.264 compression at 1920x1080 resolution with adjustable bitrate from 2Mbps to 30Mbps — balance image quality against channel bandwidth in real time.
• Wide frequency flexibility: Transmitter tunes from 180MHz to 2000MHz; receiver tunes from 180MHz to 860MHz — covers VHF, UHF, and L-band for global regulatory compliance and spectrum deconfliction.
• Adjustable channel bandwidth: 1/2/3/4/5/6/7/8MHz selectable — squeeze into narrow allocations for regulatory compliance or spread for maximum video quality.
• Non-standard AES256 encryption: 256-bit AES with a non-standard implementation provides strong signal security against unauthorized reception.
• Dual-antenna spatial diversity (RX): The receiver uses one primary and one auxiliary antenna with space diversity combining, significantly reducing dropouts from multipath and polarization mismatch.
• Built-in TF card recording: Both transmitter and receiver support automatic loop recording to TF/microSD cards — no separate DVR needed for onboard or ground-side recording.
• On-board LCD diagnostics: Both modules include a small LCD for parameter display and adjustment of frequency, bandwidth, encryption, and other settings without external software.

Technical Highlights

COFDM is the modulation foundation, splitting the H.264-encoded video stream across hundreds of narrowband orthogonal subcarriers. Each subcarrier carries a low-rate QAM-modulated signal, and the guard interval between symbols absorbs delayed multipath reflections — the same physics that makes terrestrial DVB-T work in urban environments. The system's 100ms latency is dominated by the H.264 encode/decode pipeline and the COFDM framing; the RF propagation delay is negligible. The transmitter's broad 180-2000MHz tuning range covers VHF bands (better range and penetration in foliage/building environments) through UHF to lower L-band. The receiver's spatial diversity system, with antennas separated by at least several wavelengths, provides a second independent signal path — when one antenna's signal fades, the other likely still sees a strong copy.

Applications

This board pair is designed for embedded integration: UAV gimbal cameras transmitting HD video to a ground station receiver; vehicle-mounted surveillance systems where the transmitter hides inside a license-plate or roof enclosure; body-worn or small-robot video uplinks where every gram and millimeter matters; and fixed surveillance links where the wide frequency range allows coexistence with existing licensed radios. The SDI interface makes it compatible with broadcast and pro-video cameras, while HDMI covers consumer cameras, action cams, and NUC-class embedded computers.

Why Choose This System

When you need to add a wireless HD video link to a product or platform and cannot accommodate a boxed transmitter — or need to select frequency, bandwidth, and encryption that no consumer product exposes — these OEM boards give you full control without designing RF from scratch. The transmitter's SDI+HDMI dual input, the receiver's spatial diversity, and the sub-100g board weight make it the integration-friendly choice for professional video links.