Adaptive television transmission system

US4635114A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Broder Wendland · Dortmund, DE
• Hartmut Schroeder · Duisburg, DE

Key dates

• Filing date: Nov 9, 1984
• Grant date: Jan 6, 1987
• Expiry date: Nov 9, 2004

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N7/0152
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A high quality TV transmission system is devised including a preprocessing circuit controlled by motion present in the scene to be transmitted. In the absence of motion, processing circuit derives output picture field signals of a standard frequency from a single input picture field scanned at a higher frequency. In the presence of motion, all input picture fields scanned with high number of lines are stored in storing devices and processed by interpolating low pass filters and a multiplexer into output picture fields having the standard frequency but being free of aliansing interference.