QuVIS Acuity User Manual - Image Processing
Image Processing
The QuVIS Acuity supports two image encoding (compression) methods for real-time image recording and
playback: QPE (Quality Priority Encoding) and DCI JPEG2000. QPE is the native image encoding method used by
the Acuity.
NOTICE! DCI JPEG2000 playback support does require a specific hardware configuration (VSP version 9
required). DCI JPEG2000 real-time record also requires a specific hardware configuration (VSP version 9) and the
optional 2K DCI JPEG2000 Record Module.
QPE Real-time Image Encoding (Record)
QPE is a highly efficient image encoding method that has been utilized and endorsed for its superior image quality
by leading imaging industries including image acquisition and analysis, television production, film production, 3D
production and digital cinema production.
QPE is a QuVIS patented visually lossless wavelet-based image encoding method. QPE assigns the highest priority
to capturing all the information present in the incoming image so that statistical guarantees can be made for the
resulting image quality.
The desired QPE image quality is determined by the user-selectable Signal-to-Noise Ratio (SNR) value, specified in
dBs. The higher the SNR value the higher the image quality. Source image quality is important, as QPE will not
improve the quality of the source. It is possible that if the source image quality is poor and the QPE SNR value is
set higher than the source, unnecessary noise may be added to the encoded image thereby compromising
encoding efficiency.
QPE samples the entire image thereby eliminating block artifacts typically found in DCT encoding methods. QPE is
generationally stable and is an ideal encoding image format for content production and post-production workflows.
DCI JPEG2000 Real-time Image Encoding (Record - Optional)
Real-time DCI JPEG2000 Image Encoding for Digital Cinema 2K formats is available as an optional processing
module for the Acuity. DCI JPEG2000 is the image-encoding standard selected by the Digital Cinema industry.
Like QPE, JPEG2000 is a wavelet-based image encoding method. Image encoding with JPEG2000 typically takes
one of two forms: Fixed Bit Rate (FBR) encoding and Variable Bit Rate (VBR) encoding. The form currently
supported by the Acuity is VBR with a selectable quality (SNR) setting.
Note: To support real-time 2K DCI JPEG2000 Record, the QuVIS Acuity must be configured with a version 9 VSP
(Video Signal Processor) and the optional 2K DCI JPEG2000 Record Module must be licensed and installed.
QPE Image Decoding (Play)
The QuVIS Acuity base configuration supports real-time playback of QPE media files or clips. Playback support of
QPE media files includes: collapsed (interleaved video and audio tracks) clips, expanded (separate files for video
and audio essence) clips, Digital Cinema Composition Playlists (CPL) from QuVIS Digital Cinema Packages
(QDCP), script files (QScript), Virtual Tapes (VTP), and VTP timeline files (.tl).
JPEG2000 Image Decoding (Play)
The QuVIS Acuity base configuration (with VSP 9) supports real-time playback of DCI JPEG2000 media files.
Playback support of JPEG2000 media files includes: collapsed (interleaved video and audio tracks) clips, expanded
(separate files for video and audio essence) clips, Digital Cinema Composition Playlists (CPL) from Digital Cinema
Packages (DCP), script files (QScript), Virtual Tapes (VTP), and VTP timeline files (.tl).
The QuVIS Acuity provides native full-resolution playback support for 2K 12-bit 4:4:4:0 JPEG2000 image formats.
This includes full-container (2048x1080), scope, flat, scope-on-flat, and flat-on-scope image formats.
QuVIS Acuity
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