Patent · US Expired

Method for transmitting source encoded digital signals

US6851083B1 · kind B1 · utility

23Cited by

4References

29Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Joachim Hagenauer · Hanerau-Hademarschen, DE
Thomas Stockhammer · Bergen, DE
Christian Weiss · Birkenfeld, DE
Wolfgang Denk · Burgau, DE

Key dates

Filing date	Dec 29, 1999
Grant date	Feb 1, 2005
Priority date	—
Expiry date	Dec 29, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH03M13/6375
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method of transmitting encoded digital signals and decoding the digital signals at a receiver. During source encoding, the signals are divided into a plurality of subunits. Each subunit is assigned one of a plurality of differing levels of significance. The subunits are hierarchically ordered in a data frame according to their levels of significance. The subunits are then channel encoded utilizing a variable rate code. The rate increases for increasing levels of significance. At the receiver decoder, a subset of the subunits are correctly decoded to produce a correct portion of decoded data. The correct portion is defined by a position of a first error in the data frame. The position of the first error in the data frame is dependent upon at least one of the encoding rate, channel quality, and decoding complexity. The digital signals are then reconstructed using only the correct portion of decoded data.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.