EP1052621A3 - Method and circuit arrangement for quality information determination to detect errors in the transmission of a speech signal - Google Patents
Method and circuit arrangement for quality information determination to detect errors in the transmission of a speech signal Download PDFInfo
- Publication number
- EP1052621A3 EP1052621A3 EP00440136A EP00440136A EP1052621A3 EP 1052621 A3 EP1052621 A3 EP 1052621A3 EP 00440136 A EP00440136 A EP 00440136A EP 00440136 A EP00440136 A EP 00440136A EP 1052621 A3 EP1052621 A3 EP 1052621A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- quality information
- transmission
- quality
- channel
- circuit arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000005540 biological transmission Effects 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 3
- 230000009466 transformation Effects 0.000 abstract 3
- 230000000873 masking effect Effects 0.000 abstract 2
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Error Detection And Correction (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
In digitalen Übertragungssystemen, wie beispielsweise in Mobilfunksystemen, hängt die Sprachqualität wesentlich von der Korrekturfähigkeit des Kanaldecodierverfahrens ab. Zur Verbesserung der Sprachqualität werden Fehlerverdeckungsmaßnahmen getroffen, deren Wirksamkeit von der Genauigkeit der Qualitätsinformation der Kanalübertragungsqualität bestimmt wird. Erfindungsgemäß werden bekannte Qualitätsinformationen so kombiniert und transformiert, daß sie für die Fehlerverdeckungsmaßnahmen als zuverlässige Eingangsparameter geeignet sind. Durch Berücksichtigung des Bad Frame Indikator BFI bei der Auswahl der Transformationsvorschriften lassen sich unterschiedliche Transformationsvorschriften an die jeweiligen Übertragungsbedingungen anpassen. Das Verfahren ist einfach realisierbar, wenn in einem upstream-Kanal eine Transformationseinheit (4) zwischen Kanaldecodierer (1) und Fehlerverdeckungseinheit (2) eingefügt wird. In digital transmission systems, such as in mobile radio systems, the speech quality essentially depends on the correctibility of the channel decoding method. To improve the voice quality, error masking measures are taken, the effectiveness of which is determined by the accuracy of the quality information of the channel transmission quality. According to the invention, known quality information is combined and transformed such that it is suitable as reliable input parameters for the error masking measures. By taking the bad frame indicator BFI into account when selecting the transformation regulations, different transformation regulations can be adapted to the respective transmission conditions. The method can be easily implemented if a transformation unit (4) is inserted between the channel decoder (1) and the error concealment unit (2) in an upstream channel.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19921504 | 1999-05-10 | ||
DE1999121504 DE19921504A1 (en) | 1999-05-10 | 1999-05-10 | Method and circuit arrangement for determining quality information about the transmission quality of a speech signal in a digital transmission system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1052621A2 EP1052621A2 (en) | 2000-11-15 |
EP1052621A3 true EP1052621A3 (en) | 2003-11-05 |
Family
ID=7907585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00440136A Withdrawn EP1052621A3 (en) | 1999-05-10 | 2000-05-09 | Method and circuit arrangement for quality information determination to detect errors in the transmission of a speech signal |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1052621A3 (en) |
AU (1) | AU2777500A (en) |
DE (1) | DE19921504A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10065937A1 (en) * | 2000-11-17 | 2002-05-23 | Rohde & Schwarz | Method and arrangement for measuring the bit error rate and / or block error rate of a mobile phone |
US7035347B2 (en) | 2002-11-13 | 2006-04-25 | Sony Ericsson Mobile Communications Ab | Combining direct interference estimation and decoder metrics for improved measurement for AMR mode adaptation in GSM systems |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4335305A1 (en) * | 1993-10-16 | 1995-04-20 | Philips Patentverwaltung | Method and circuit arrangement for transmitting voice signals |
US5432778A (en) * | 1992-06-23 | 1995-07-11 | Telefonaktiebolaget Lm Ericsson | Method and an arrangement for frame detection quality estimation in the receiver of a radio communication system |
EP0689312A2 (en) * | 1994-06-21 | 1995-12-27 | NEC Corporation | Soft decision signal outputting receiver |
EP0798888A2 (en) * | 1996-03-29 | 1997-10-01 | Nokia Mobile Phones Ltd. | Method and apparatus for digital communication with error encoding according to division of data in classes |
EP0805572A2 (en) * | 1996-05-03 | 1997-11-05 | Texas Instruments Inc. | Error detection and error concealment for encoded speech data |
US5901186A (en) * | 1994-04-28 | 1999-05-04 | Telefonaktieboalget Lm Ericsson | Bad frame detection |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3535178A1 (en) * | 1985-10-02 | 1987-04-09 | Thomson Brandt Gmbh | Correction method |
JP2746033B2 (en) * | 1992-12-24 | 1998-04-28 | 日本電気株式会社 | Audio decoding device |
US5502713A (en) * | 1993-12-07 | 1996-03-26 | Telefonaktiebolaget Lm Ericsson | Soft error concealment in a TDMA radio system |
FI100566B (en) * | 1996-01-24 | 1997-12-31 | Nokia Telecommunications Oy | Frame quality identification method and receiver |
-
1999
- 1999-05-10 DE DE1999121504 patent/DE19921504A1/en not_active Ceased
-
2000
- 2000-04-14 AU AU27775/00A patent/AU2777500A/en not_active Abandoned
- 2000-05-09 EP EP00440136A patent/EP1052621A3/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5432778A (en) * | 1992-06-23 | 1995-07-11 | Telefonaktiebolaget Lm Ericsson | Method and an arrangement for frame detection quality estimation in the receiver of a radio communication system |
DE4335305A1 (en) * | 1993-10-16 | 1995-04-20 | Philips Patentverwaltung | Method and circuit arrangement for transmitting voice signals |
US5901186A (en) * | 1994-04-28 | 1999-05-04 | Telefonaktieboalget Lm Ericsson | Bad frame detection |
EP0689312A2 (en) * | 1994-06-21 | 1995-12-27 | NEC Corporation | Soft decision signal outputting receiver |
EP0798888A2 (en) * | 1996-03-29 | 1997-10-01 | Nokia Mobile Phones Ltd. | Method and apparatus for digital communication with error encoding according to division of data in classes |
EP0805572A2 (en) * | 1996-05-03 | 1997-11-05 | Texas Instruments Inc. | Error detection and error concealment for encoded speech data |
Also Published As
Publication number | Publication date |
---|---|
AU2777500A (en) | 2000-11-16 |
DE19921504A1 (en) | 2000-11-23 |
EP1052621A2 (en) | 2000-11-15 |
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RIC1 | Information provided on ipc code assigned before grant |
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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Effective date: 20031104 |