Browse Prior Art Database

Digital Video System Image Enhancement Broadcast Compatible Encoding Process

IP.com Disclosure Number: IPCOM000107729D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 3 page(s) / 115K

Publishing Venue

IBM

Related People

Fleischman, RM: AUTHOR [+3]

Abstract

Described is a broadcast-compatible encoding process to provide image enhancement in digital video systems. The process involves post-production processing of video source material so as to evaluate frames or lines for motion and other attributes.

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Digital Video System Image Enhancement Broadcast Compatible Encoding Process

       Described is a broadcast-compatible encoding process to
provide image enhancement in digital video systems.  The process
involves post-production processing of video source material so as to
evaluate frames or lines for motion and other attributes.

      In prior art, the perceived image quality, often referred to as
the "Digital Look", is generally caused by artifacts which are
introduced as a result of the digitalization process and attempts to
increase the picture content artificially.  Errors in these processes
produce unwanted effects.  Efforts to reduce these errors have
required the use of complex algorithms along with larger and faster
processors necessary for real-time processing of video information.
The concept described herein provides a means of simplifying the
process while providing a step functional improvement in the picture
quality.

      Fig. 1 shows the broadcast-compatible post-processing technique
for motion and picture attributes.  The technique includes controlled
digitally encoded information that is within the video format.  This
information provides the capability of altering the display system so
as to produce an improved image while maintaining compliance and
compatibility with current technology.  Fig. 2 shows the steps used
for video attribute data as utilized for picture process control.

      Digital information is encoded in the vertical blanking
interval, as in teletext; however, for certain types of information,
the horizontal blanking time can be used.  The information is
detected by a TV receiver and interpreted to control such functions
as brightness, contrast, color saturation, sharpness, etc.  With the
inclusion of motion information, the digital TV receiver is capable
of adjusting filtering coefficients used in noise-reduction systems
and types of scan-line conversion.

      The source video material is post-production processed, much as
Dolby processing is applied to the audio portion of the signals.
This processing is n...