Evaluation of received useful information by the detection of error concealment

• US 20050229046A1
• Filed: 07/24/2003
• Published: 10/13/2005
• Est. Priority Date: 08/02/2002
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Marke, Matthias, Xu, Wen
• Application Number:
  US10/523,326
• Publication Number:
  US 20050229046A1
• Time in Patent Office: Days
• US Class Current: 714/100
• CPC Class Codes: G10L 19/005 Correction of errors induced by the transmission channel, if related to the coding algorithm
• CPC Class Codes: H03M 13/00 Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes error detection or error correction for analogue/digital, digital/analogue or code conversion H03M1/00 – H03M11/00; specially adapted for digital computers G06F11/08; for information storage based on relative movement between record carrier and transducer G11B, e.g. G11B20/18; for static stores G11C
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end

Abstract

The present invention relates to an effective option for recognizing error concealment, provided by a method and a device for evaluating data containing useful information that has been received via a communications network. The present invention is characterized in that the use of error concealment is detected after receipt through a statistical analysis of the useful information.

Claims

1-13. -13. (canceled)

14. A method for evaluating data containing useful information received via a communication network, the method comprising:

evaluating and at least partially correcting, via a channel decoder, the data received;

forwarding, via the channel decoder, to a speech decoder the data with characteristics of supplementary information representing the data;

decoding the data via the speech decoder and, where necessary, performing error concealment;

forwarding the data to a text telephony receiver via the speech decoder;

evaluating the data received and analyzing the data statistically, via a demodulator in the text telephony receiver, by measuring a signal energy;

generating, via the demodulator, reliability information relating to the data received;

forwarding the data, via the demodulator, with the reliability information to an error correction modulator; and

correcting the data received, via the error correction modulator, taking into account the reliability information.

15. A method for evaluating data containing useful information as claimed in claim 14, further comprising determining a likelihood of the reliability information representing appropriate decoding of the data received as a function of a result of the error concealment.

16. A method for evaluating data containing useful information as claimed in claim 15, further comprising providing a channel decoder which takes account of the reliability information for channel decoding.

17. A method for evaluating data containing useful information as claimed in claim 14, wherein the data is emergency call-related data.

18. A method for evaluating data containing useful information as claimed in claim 14, wherein the data is analyzed in a mobile station.

19. A method for evaluating data containing useful information as claimed in claim 14, wherein the data is transmitted over a cellular mobile communication network.

20. A method for evaluating data containing useful information as claimed in claim 14, wherein for statistical detection of an error concealment by the speech decoder, time segments of frames of the received useful information are analyzed.

21. A method for evaluating data containing useful information as claimed in claim 20, wherein the time segments are analyzed in a text telephony demodulator.

22. A method for evaluating data containing useful information as claimed in claim 14, wherein the error correction modulator is located in the text telephony receiver.

23. A method for evaluating data containing useful information as claimed in claim 14, wherein the data is encoded with Adaptive Multi Rate.

24. A method for evaluating data containing useful information as claimed in claim 14, wherein the useful information includes at least one of text, speech, picture and video signals.

25. A device for evaluating data containing useful information received via a communication network, comprising:

a channel decoder in a communication terminal receiver for evaluating and at least partially correcting the received data, and for forwarding the data with characteristics of supplementary information representing the data to a speech decoder;

a speech decoder for decoding and, if necessary, performing error concealment, and for forwarding the data to a text telephony receiver;

a demodulator in the text telephony receiver for evaluating and statistically analyzing the received data by measuring a signal energy, for creating reliability information relating to the data and for forwarding the data with the reliability information to an error correction modulator; and

an error correction modulator for correcting the received data, taking into account the reliability information.