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H264ULL-Decoder - Ultra Low Latency Quad H.264 Decoder

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The H264ULL-DECODER is an ultra low latency, quad channel, H.264 decoder on a single PCI/104 form factor board. The H264ULL-DECODER provides a powerful solution for decompressing up to 4 H.264/MPEG-4 AVC (Part 10) encoded streams to analog NTSC/PAL composite displays.

The H264ULL-DECODER is an ideal companion to Advanced Micro Peripherals range of Ultra Low Latency H.264 encoder products. When combined with a card such as the H264-ULL- SD4 the H264-ULLDECODER can be used to create an ultra low latency video streaming solution with a glass to glass latency of less then 100mS.

The high performance H.264 video decompression and efficient bus utilization allows the H264ULL-DECODER to do multiple channel, low latency decoding when hosted on a low power, fanless CPU board.



  • Real time 4x full size H.264 decode at full frame rate
  • Composite NTSC/PAL/RS-170 video output
  • H.264/MPEG-4 AVC (Part 10) decoder
  • Ultra Low Latency technology with a latency below 40ms
  • Up to four H264ULL-DECODER boards per system
  • Standard PCI/104 form factor
  • Drivers for WinXP-E and Linux

Software Development Kits

The H264ULL-DECODER is supported by a set of well-documented and established SDKs that minimize development risk and shorten time to market for applications requiring video playback.

Block Diagram

Block Diagram

PCI/104 Bus Interface

  • Compliant with PCI Rev 2.1
  • 132 MBytes/sec bandwidth at 33.33 MHz bus speed
  • Single +5 V supply

Analog Video Output

  • 4 composite NTSC/PAL/RS-170 video output channels
  • 10-bit DAC per channel

Video Output Formats

  • Standard CCIR601-NTSC, CCIR-PAL, NTSC-M, RS-170, PAL-B/G

Ultra Low Latency

  • Less than 40ms decode latency

Video Decoding

  • H.264 ISO/IEC 14496-10 baseline and Main Profile up to L4.2
  • Real-time multi stream H.264 Ultra Low Latency decompression
  • 4 channel NTSC D1 (720x480) at 30fps
  • 4 channel PAL D1 (720x576) at 25fps

Configuration support per output

  • Video Standard

System Requirements

  • x86 PC-Compatible PCI/104 Computer
  • Spare REQ/GNT on PCI/104 Bus
  • 3.3V signalling PCI/104 bus


  • Standard 3.6 x 3.8in PCI/104 form factor

Operational characteristics

  • Operating temperature 0°C to 60°C
  • Extended temperature -40°C to +85°C (option)


  • Drivers for Win-XP, Linux
  • Comprehensive video recording SDK
  • Sample video decoding application in C/C++ source code

The following order codes can be used when ordering the H264ULL-Decoder

H264ULL-Decoder - (0 to 60°C)
H264ULL-Decoder-Ext - (-40°C to +85°C)

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