SHD4 H264 low-latency decoding and playback board

• COFDM wireless receiving video stream input，H.264 decoding，HDMI、OF、USB/Ethernet simultaneous video streaming output
• Low-latency H.264 audio and video decoding HD playback board，Maximum support for 1080P@60 real-time decoding
• Ethernet input video stream，H.264 decoding HDMI and AV output
• Can store received video streams，Recording file with time information(With RTC function)
• Small size 80.4 * 50.8 mm，Convenient for user integration

Function description：

• SHD4 board implements H.264 video decompression and playback function，Maximum support for 1080P@60fps decoding and playback，Backwards compatible with various other resolutions、Frame rate decoding and playback。SHD4 decoding board with H264 encoding board(For example SUE1)Used with COFDM transmitting and receiving modules to achieve low-latency high-definition digital wireless image transmission function，When actually testing 720P@60, the video delay can reach about 60ms.，1080Video delay can be about 130ms at P@60。The delay refers to the delay from the HDMI video input of the transmitter to the HDMI video output of the receiver.，Does not include the delay of the transmitter front-end camera(We actually measured the delay of a certain brand of SLR camera to be around 70ms.、The delay of a well-known brand action camera is about 130ms)；
• Support AES decryption function(Encryption matching with transmitter，The password can be set through the parameter panel)；
• Audio and video output interface：
  • HDMI-A type port audio and video output(HDMI out)
  • AV audio and video output(6PIN port)
  • USB Host interface output to mobile phone or tablet
  • Ethernet port output
• USB Host interface：
  • External U disk/mobile hard disk storage
  • Stream video to mobile phone/tablet，Simultaneously realize HDMI video display and mobile phone video display
• Parameter configuration serial port(Config UART)：Can be connected to PC or parameter control panel for parameter configuration，It can also be connected to other host computers for parameter configuration.(For example, drone remote control)。Config UART is TTL 3.3v level；
• Transparent data transmission serial port(Data UART)，TTL 3.3V level；
• TF card interface(For software upgrade and maintenance、Video storage etc.)；
• DR2C dual-antenna COFDM receiving module docking interface；
• Keys+LEDs：Can be exported as power indicator light、RF signal receiving indicator light、Recording indicator light、OSD on/off button、Record on/off button；
• Ethernet port：Video input or output interface；
• Power in interface：Supports 9~30V power input；
• Dimensions 80.4 x 50.8 mm(Excluding the dimensions of interface components and connectors protruding from the edge of the board)。

SHD4 decoder board application：

1)SHD4 board is assembled with DR2C dual-antenna COFDM receiving and demodulating module，Form a complete COFDM receiving and decoding function。：

2)The Config UART interface of the SHD4 board can be connected to an external serial port control panel，Set operating parameters，Such as working frequency band、Configurable convolutional coding ratio、receive password、Settings for system time, etc.。The picture below is a schematic diagram of the serial port control panel SconA connected to the SHD4 board through a 4PIN cable.，It is powered by the SHD4 board。

3)The SHD4 decoding board can also input H.264 video streams through the network port for decoding and playback output.，The software can program the corresponding version of firmware according to user needs.。

4)The SHD4 board can transmit the COFDM wireless video stream received by the DR2C to a PC or NVR device through the network port.，decode and play。
5)The SHD4 board can receive OSD overlay data through the Data UART interface(Meet the "OSD Overlay Agreement")，And the received OSD superimposed data is superimposed and displayed on the video screen in text form.。