Apparatus and method for generating a processed video picture by interpolating intensities of an original video picture

US5854659A · kind A · utility

Assignee

• LDT GmbH & Co. Laser-Display-Technologie KG · DE

Inventors

• Christhard Deter · Hermsdorf, DE
• Dieter Hubrich · Hermsdorf, DE
• Olaf Kotowski · Hermsdorf, DE
• Dirk Loeffer · Brahmenau, DE

Key dates

• Filing date: Jan 7, 1997
• Grant date: Dec 29, 1998
• Expiry date: Jan 7, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N7/0125
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In a process for processing a first video picture with image points in m.sub.1 lines, whose image points in the l.sub.1 -th line have an intensity I.sub.1 (t, l.sub.1) depending on a parameter t, in particular depending on time, for generating a second video picture with m.sub.2 lines, the respective intensity I.sub.2 (t, l.sub.2) of an image point in the l.sub.2 -th line of the second video picture is interpolated from the intensities of the image points of the first video picture I.sub.1 (t, l.sub.1), wherein I.sub.2 is obtained according to the following equation: EQU I.sub.2 (t,l.sub.2)=Max(J(t,l.sub.2)+.DELTA.;0), where the values J, with respect to the lines, represent discretized values of a signal waveform given by the sampling theorem and in which an offset .DELTA. is provided for partial compensation of negative intensities of the discretized signal waveform J so that the interpolation with respect to the lines is effected with A as a freely selectable amplitude of positive value according to the following equation: ##EQU1## An apparatus contains corresponding circuit parts for generating the second video picture according to the indicated process.