Method and device for transmitting additional data in television channels

US6055020A · kind A · utility

Assignee

• DEUTSCHE TELEKOM AG · DE

Inventors

• Rudolf Lorenz · Groß-Bieberau, DE
• Adolf Finger · Dresden, DE
• Hartmut Hiller · Freital, DE
• Oliver Gotting · Dresden, DE
• Jens Schonthier · Dresden, DE
• Frank Poegel · Dresden, DE

Key dates

• Filing date: Jul 2, 1998
• Grant date: Apr 25, 2000
• Expiry date: Jul 2, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N7/085
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Therefore, the object of the invention is to utilize the unused channel capacity of the television channel even more optimally for additional signals. Both on the transmitting, as well as the receiving side, the clock pulses for video and audio data to be additionally transmitted are generated from the FBAS useful signal by counting, weighting and decision-making, both signals being separately digitized, buffered, and compressed before being superimposed upon on the useful video signal. Subsequent to the same clock pulse generation, the steps follow in the reverse order on the receiver side. The implementation can be carried out on the transmitter side using additional equipment, on the receiver side by computer software or additional devices installed in the conventional TV set. The application can be carried out for any additional video and sound signals. A preferred special application is a community picture broadcast similar to a slide presentation.