Process for transmitting and receiving a signal

US5227990A · kind A · utility

Assignee

• Telefunken Fernseh und Rundfunk GmbH · DE

Inventors

• Thomas Vaupel · Berkum, DE
• Detlef Krahe · Kempen, DE
• Gerhard Dickopp

Key dates

• Filing date: Jan 17, 1992
• Grant date: Jul 13, 1993
• Expiry date: Jan 17, 2012

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/66
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A signal is divided by windows into successive blocks that overlap at least by 50% and signal sections contained in the blocks are evaluated by analysis windows. The signal sections contained in the blocks are subjected to a transformation which permits sub-sampling with compensation of the aliasing components such as, for example, the "time domain aliasing cancellation" method. The spectra resulting from the transformation are subsequently coded, transmitted, decoded after transmission and changed back to signal sections by re-transformation. The blocks including the signal sections are evaluated by synthesis windows and are joined together in an overlapping fashion. The window functions of the synthesis windows are determined in dependence on the window functions of the corresponding analysis windows in the overlap region.