Realtime HEVC/H.265 Encoder - ZenHEVC

Li Song, Xiangwen Wang, Zhengyi Luo, Yanan Zhao


HEVC(High Efficiency Video Coding)/H.265 has been approved in February 2013 by MPEG and ITU, which is set to provide double the capacity of today's leading video coding standards - H.264/AVC or VP8; However,the improved coding efficiency of HEVC does come with a price of increased computational complexity, it is estimated the HEVC encoding will require up to 10 times more procesing power than its predecessor-H.264 encoding.

With a flexible software based architecture on general purpose computational platform(multicore CPUs and GPUs), our team has developed a leading realtime HEVC encoder - ZenHEVC, which currently support 1920x1080p@60fps and 3840x2160@30fps with high compression performance. Compared to HEVC reference code, HM10.0, the ZenHEVC is less than 0.3dB in terms of RD loss while maintaining realtime HD encoding speed.

Highlight of ZenHEVC: Higher,Faster,Stronger!

  • Efficiency:

    50% bitrate of H.264/AVC at the similar video quality for HD or UHD resolution video


    Full HD realtime(1080p@60fps) and 4K realtime(2160p@30fps)

    several hundreds times faster than HM10.0 with multithreads parallel coding


    Compatiable with HM 10.0 and later

    Pure soft based solution, easy to integrated and deployed

    Intel x86 general purpose multicore platform, high performance and low cost

    Pure C code, easy to extend other platforms like DSP or FPGA

    Implement most of key algorithms as HM10.0, can be set ON or OFF for each module

    Provide SDK for high level application, customization, system(hardware+software ), media cloud service



Live capture : 3G-SDI/HDMI/DVI/VGA, YUV 4:2:0, 8 Bit

Live streaming: TS over UDP, http streaming, etc

Local File: TS, MP4, AVI,etc



Iamge setting: Brightness/Constast/Hue adjust; cropping and scaling

Video filters: denoising, deinterlacing and deshaking, retargeting, change detection

Video Encoder

Profile: HEVC Main Profile

Rate Control: VBR, CBR or fixed QP

Rate Range: 500Kbps to 20Mbps

Resolutions: HD(720p, 1080p) and 4K(3840x2160)

HEVC Encoder Parameters:

CU/PU/TU: CTU=64x64, PU= 64x64 to 4x4, TU Depth=2

Parallel: WPP, Frame and GOP

Intra Prediction: 35 directions ,DC and planar

Inter Prediction: support P/B Frames

ME Search Range: +/-64, 1/4 pixel precision with fast algorithms HEX or DIA

RDO, RDOQ and Sign Bit Hiding: ON

Deblocking and SAO: ON

Support our original SSIM based RDO algorithm

Support our original ROI based QP adjust algorithm


Interface: RJ45, IP

Container Formats: TS or MP4

Streaming Protocols: UDP, HLS, MPEG-DASH

Comatible Platform

Hardware: HP/DELL server/workstation with Intel Xeon E5-2600 series)

OS: Windows7 64-bit profession version

Media Players: VLC, FFMPEG, and Media player with DShow Filter plugin

Product Series


Live H.265 Transcoder

- Multiscreen application

- Up to 6 different resolutions




Live 4K H.264/H.265 Encoder




Detailed datasheet can be downloaded as PDF!