HDH265-W H.265 COFDM Mainboard

Overview

The HDH265-W H.265 COFDM Mainboard is a compact board-level wireless video transceiver that brings next-generation H.265/HEVC compression to COFDM-based transmission systems. With the transmitter measuring just 75 x 55 x 15 mm, it is purpose-built for OEM integrators who need to embed broadcast-grade wireless HD video capability into drones, robotics, body cameras, surveillance equipment, and portable field systems.

Despite its miniature footprint, the HDH265-W delivers the same COFDM multipath resilience found in larger rack-mounted systems. It supports H.265 compression at bit rates from 2 to 12 Mbps, producing full HD 1080P video with a lower bandwidth footprint than H.264 equivalents, and includes HDMI, analog CVBS, and RJ-45 Ethernet inputs for maximum source flexibility.

Key Features

• H.265/HEVC compression for superior video quality at lower bit rates compared to H.264
• Ultra-compact form factor -- TX board 75 x 55 x 15 mm, RX board 81 x 60 x 24 mm
• Three switchable frequency channels in the 300-800 MHz band for on-the-fly interference avoidance
• HDMI + CVBS analog + RJ-45 Ethernet inputs for diverse video source connectivity
• COFDM modulation with 6/7/8 MHz channel bandwidth
• Spatial diversity dual-antenna reception with one primary and one auxiliary antenna
• Built-in USB recording on the receiver for direct video capture to removable storage
• 240 ms system latency for responsive real-time applications

Technical Highlights

The HDH265-W is the most advanced board-level COFDM transceiver in Sdison's lineup, featuring H.265 encoding that achieves the same 1080P visual quality as H.264 at roughly half the data rate -- a critical advantage in bandwidth-constrained or congested RF environments. The transmitter output is 30 dBm (1W), and channel bandwidth is selectable between 6, 7, and 8 MHz.

The receiver uses spatial diversity with dual antennas to combat multipath fading, and includes an integrated LCD for signal strength indication, channel switching, resolution switching, and video channel selection. With receiver sensitivity of -97 dBm at 6 MHz, the link maintains reliability across demanding non-line-of-sight paths.

Applications

The HDH265-W is designed for OEM integration into unmanned systems (UAVs, UGVs, and marine vessels), body-worn cameras for law enforcement, covert surveillance equipment, portable medical video systems, and industrial inspection robots. Its Ethernet interface also enables IP camera backhaul and network-bridge applications.

Three switchable channels allow the integrator to deploy multiple units in the same area without mutual interference, making the board suitable for multi-drone shows, multi-robot teams, and distributed sensor networks.

Why Choose This System

The HDH265-W delivers H.265 efficiency and COFDM reliability at a board-level size and cost point that no other wireless video module matches. For OEMs building next-generation wireless video products, it eliminates the need to compromise between video quality, range, and board footprint -- the HDH265-W delivers all three in a single 15 mm-thick package.