COFDM wireless 4K HDMI video encoder modulator transmitter

COFDM wireless 4K HDMI video encoder modulator transmitter

Overview

The VCAN1776-TX-4KHDMI module is a versatile, low-latency HDMI video transmitter that supports up to 4K (3840×2160 @30fps) HDMI input. Using advanced H.265/H.264 encoding with COFDM modulation technology, it ensures high-quality video and audio transmission in high-speed motion and non-line-of-sight (NLOS) environments.

Key Features

• High-Quality Video Transmission: Supports HDMI input with a maximum resolution of 4K (3840*2160@30fps), using H.265/H.264 encoding for efficient, low-latency video transmission.

• Dual Video Input: Capable of transmitting both HDMI and IP camera inputs simultaneously via COFDM modulation, providing flexible video source options.

• Audio Support: Accepts analog audio or HDMI audio input for seamless integration with your video transmission needs.

• Transparent Data Transmission: Supports one-way transparent data transmission via UART, ideal for unidirectional data communication.

• Web-Based Configuration: Features a Web UI for easy configuration management, allowing users to adjust working parameters such as frequency, bandwidth, bitrate, and RF power via UART control.

• UART Control Interface: Features a UART control interface for manual operation or integration with other systems for advanced control.

Modular Design

The module consists of two interconnected boards (video codec board and COFDM modulation board) connected via a flat cable, providing a compact, customizable solution for a variety of applications.

Flexible Operation

The VCAN1776-TX-4KHDMI module offers various operation modes based on firmware specifications and can be customized to suit specific needs, whether for standard or low-latency operation.

Default Features

• H.265 video compression and COFDM modulation for enhanced transmission.

• Supports video input from HDMI and IP cameras via the Ethernet port.

• Adjustable parameters such as frequency, bandwidth, bit rate, and RF power.

Latency and Performance

• Typical latency between video input and HDMI output on the receiver is 200ms to 250ms under standard settings.

• For ultra-low-latency needs, the module can be paired with specific receivers and firmware to reduce latency to 50ms–130ms.

Optional Firmware Configurations

• Standard H.264 video compression (paired with Vcan1776-RX receiver module).

• Proprietary H.264 with P-frames for lowest latency (with specialized firmware).

 

Specification

IO

HD Video input	HDMI, HDMI type A Connector
Ethernet1 port	4PIN PH1.25mm Connector, can’t work when connecting with the COFDM modulator module
Ethernet2 port	4PIN PH1.25mm Connector, support IP camera input and web UI management, fixed IP address as 192.168.0.215
TTL UART data	3PIN PH1.25mm Connector
TTL UART control	4PIN PH1.25mm Connector
Power in	2PIN PH2.0mm Connector
USB port	4PIN PH1.25mm Connector, only for firmware updating
HDMI output	HDMI type A Connector, can’t work when connecting the COFDM modulator module
RF output	IPEX

Modulation

Modulation Formats	COFDM(DVB-T)
Carriers	2K
Bandwidth	Configurable from 1MHz to 8MHz, step by 1KHz
FEC	1/2, 2/3, 3/4, 5/6, 7/8
Guard interval	1/32, 1/16, 1/8, 1/4
Constellation	QPSK, 16QAM, 64QAM
Bitrates	0.5Mbps to 31.67Mbps

RF

Frequency Bands	200MHz~2300MHz(other bands can be supported with special manufacturing)
Tuning Step size	1KHz
Power out	Configurable from -93dBm to -5dBm(subject to frequency)

Video and Audio

Video input	HDMI or IP camera, auto-detected HDMI input after system start-up, it need to set up via web UI for IP camera input
Video formats	HDMI input: 3840*2160@30, 1080@60P, 1080@50P, 1080@30P, 1080@25P, 1080@24P, 1080@60I, 1080@ 50I, 1080@30I, 720@60P, 720@50P, 720@30P, ……
Video Coding	H.265/H.264
Audio input	Embedded HDMI or Analog audio(Specify Mic in/Line in)
Audio Coding	AAC, 16bit, stereo, 32Kbps
Encryption	AES256

Monitoring and control

Comprehensive setup with our Parameter Configure Panel or other device via control UART.

Temperature range

Full specification: 0° to +70°C Ambient (Optional: -40° to +85°C )

Storage: –40° to +85°C

Dimensions and weight

80x50x15mm(not including connectors out of the board), 41gram.

Power requirements

Input range: 7~30VDC

Power consumption: <400mA@12V

Signals description

Encoder board I/O port

Power-in and 5V-out

The power input interface is a 2PIN PH2.0mm connector. The module also provides a 5V power output (two solder holes) for fan that it may be required when the module is integrated with a power amplifier.

HDMI-out

HDMI-out is for video output when this 4K HDMI encoder module works independently as a video decoder. The HDMI-out port doesn’t work when the 4K HDMI encoder module is connected with the COFDM modulator module.

Ethernet1

When 4K HDMI encoder module works independently as a video encoder or decoder, Ethernet1 is valid. When 4K HDMI encoder module connects with the COFDM modulator module, Ethernet1 can’t work because the Ethernet port signals in Ethernet1 and FPC-main are multiplexed.

Ethernet2

The IP address of Ethernet2 is fixed as 192.168.0.215 in firmware, so it can’t be changed. It has a built-in web server in the system, and customers can manage parts of the parameters via the web UI (URL address: http://192.168.0.215/). Ethernet2 supports connecting IP cameras. The system has a built-in RTSP client to get the RTSP video stream from IP cameras. It needs to set the RTSP video stream URL address of the IP camera to the system via the web UI first.

Ethernet2 is a 4PIN 1.25mm pitch connector, it can be installed according to the customer’s installation needs, either using the vertical insertion connector as shown in the above image, or using the 90-degree bent insertion connector as shown in the image below, with the interface extending out of the right side plate edge.

Analog audio-in/out

When the 4K HDM encoder board is used together with the COFDM modulator module as a COFDM transmitting module, the Audio-out signal pin is invalid. Only the audio-in and GND signal pins are required as analog audio input signal pins.

Data uart

The module supports one channel of UART data packed with the video stream and transmitted. When the VCAN1776-TX-4KHDMI module works paired with a Vcan1776-RX receiver, this UART data will be transferred to the data UART of our COFDM receiver module.

Control uart

4PIN PH1.25mm connector, TTL 3.3V. The 4K HDMI Encoder board system can be setup via this control UART with AT commands. Our Parameter Configure Panel can be connected to this control UART directly.

LEDs and GPIO

There are three signal indicator lights (LED1/LED2/LED3) on the right side of the 4K HDMI encoder module board, and the indicator light signals are simultaneously connected to the J6011 connector pins (4PIN 1.25mm connector). Some customers may need to assemble indicator LEDs on their housing case, so they can use J6011 connector pins to add indicator LEDs on their housing case.

When the 4K HDMI encoder module works with a COFDM modulator module, the corresponding signals of the indicator lights are as follows:

LEDs	Description	Corresponding J6011 PIN
LED1	Power-LED: red color, constant light when the board is normal powered.	LED1-PIN
LED2	Green color, constant light when the input video is detected successfully, otherwise it will not light.	LED2-PIN
LED3	Encoding-LED: green color, blinks when video encoding normally.	LED3-PIN

Customizable Options

1. Video Input Options: Customers can choose between different video input formats, such as HDMI, SDI, and IP camera inputs, depending on the application and hardware compatibility.

2. Transmission Power & Range: You can adjust the transmission power to suit various operational ranges, allowing for longer or shorter communication distances depending on the specific needs of the project or environment.

3. Frequency Bands: Custom frequency bands can be selected for better adaptability to specific regions or to comply with local regulatory requirements.

4. Video Encoding Formats: The encoder can support different video encoding formats such as H.264, H.265, and others, enabling users to prioritize video quality, compression, or latency.

5. Audio Input Options: Audio input can be configured to support analog or HDMI audio, catering to different sound sources.

6. Data Transmission Channels: There are options for configuring additional data channels, allowing users to transmit auxiliary data, telemetry, or control signals alongside the video stream.

7. Web UI Customization: The system can be configured for a customized Web User Interface (UI), where users can easily monitor and manage the device settings remotely.

8. Encryption and Security: For secure transmission, the product can be customized with encryption features that ensure the video and data are transmitted safely.

Application

1. Drone Video Transmission:

   • This product is ideal for transmitting live 4K HD video from drones to ground stations in real-time. It can be used for aerial surveillance, inspections, and monitoring applications, where high-definition, low-latency video is essential.

2. Search and Rescue Missions:

   • In search and rescue operations, drones equipped with this encoder can send live footage to the ground team, improving situational awareness and helping rescuers make quick decisions in critical environments.

3. Military Reconnaissance:

   • The COFDM technology ensures stable video transmission even in complex and obstructed environments (like forests, urban areas, or mountainous regions). This is crucial for military reconnaissance missions that require uninterrupted video feeds from UAVs.

4. Public Safety and Security:

   • Law enforcement and emergency response teams can use drones equipped with this encoder to monitor crowds, track suspects, or assess disaster zones. The high-definition video feed aids in making better-informed decisions in real-time.

5. Agricultural Drones:

   • Drones used in agriculture for crop monitoring or surveying can benefit from high-definition, real-time video transmission, allowing farmers to assess crop health or perform aerial mapping with detailed imagery.

6. Broadcasting and Film Production:

   • In the entertainment industry, drones equipped with this video encoder can transmit high-quality footage for live events or film production. This can be especially useful for capturing hard-to-reach aerial shots in high definition.

7. Inspection of Infrastructure:

   • Drones used for inspecting critical infrastructure like power lines, pipelines, or buildings can send live video feeds back to the control center, allowing operators to identify any issues or damages quickly and accurately.

8. Industrial Monitoring:

   • The encoder can also be used in industrial sectors to monitor remote areas, construction sites, or dangerous environments, offering a clear and reliable video feed to ensure safety and operational efficiency.

In the drone industry, the COFDM Wireless 4K HDMI Video Encoder Modulator Transmitter is highly beneficial for applications requiring long-range, high-definition video transmission with minimal latency.

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