| Home | Download Service Center Jobs  | Add Favorites |

首頁 DSP應用 影像處理 > JPEG2000 Encoder

JPEG2000 Encoder 

Platform: Philips TriMedia TM-1300
Compatible operating systems: pSOS


  The JPEG2000 Encoder Library is a highly optimized product intended for leading edge image/video compression and data transmission applications. JPEG2000 image compression standard provides a significant improvement in compression quality in comparison with other image compression standards, such as JPEG. This property of JPEG2000 image compression standard provides substantial image data archive size reduction without any quality deterioration. JPEG2000 is recommended for use in surveillance, video monitoring, digital cinema and other applications. The standard also supports additional features such as lossless coding, regions of interest, and tools for transmission over error-prone networks. These features are supported in Alarity's library.
    The JPEG2000 Encoder Library is based on a number of proprietary algorithms such as rate-dependent rate-allocation algorithm, which speeds up the encoding process on higher compression rates. There are also several platform-dependent optimization techniques used in the JPEG2000 Encoder Library, such as utilization of fixed point arithmetic.
    Library supports lossy and lossless compression for grayscale, RGB and YUV images with different sub-sampling ratios.


  • Fully compliant with ISO/IEC 15444-1 JPEG2000 Image Coding Standard: Part

  • Grayscale and color RGB, YUV 4:4:4, 4:2:2 and 4:2:0 images support

  • Compression ratios from 1:1 up to 1:300 and higher (content dependent);

  • Lossless compression support;

  • ROI (Region of Interest) support;

  • High performance implementation of 9-tap/7-tap and 5-tap/3-tap wavelet transforms;

  • Large image support (tiling);

  • Embedded memory management mechanism;

  • Streaming video handling support.

Technical Specs:
  • Encoding speed: 12 fps for 720x480 YUV 4:2:0 images at 1:100 ratio on 245 MHz TM1300.

  • Memory requirements: 6 bytes of RAM per tile sample.

Application Areas:
Imaging, Signing, Video Monitoring, Multimedia, Digital Cinema, Wireless Video Observation, Medical Electronics, Cartography, Astrophotography.