EP1303856B1 - Procede pour le masquage d'erreurs dans des champs de transmission de donnees audio numeriques - Google Patents
Procede pour le masquage d'erreurs dans des champs de transmission de donnees audio numeriques Download PDFInfo
- Publication number
- EP1303856B1 EP1303856B1 EP01953895A EP01953895A EP1303856B1 EP 1303856 B1 EP1303856 B1 EP 1303856B1 EP 01953895 A EP01953895 A EP 01953895A EP 01953895 A EP01953895 A EP 01953895A EP 1303856 B1 EP1303856 B1 EP 1303856B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- error
- digital audio
- audio data
- errors
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims description 53
- 238000000034 method Methods 0.000 title claims description 43
- 230000000873 masking effect Effects 0.000 claims 5
- 238000001514 detection method Methods 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000005923 long-lasting effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
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
Definitions
- the Reception quality from the previously set audio channel for the initialization of the Error concealment is used with the currently set audio channel.
- the previously set audio channel provides data on the transmission conditions required for Time is available and thus an estimate of which reception quality at the current audio channel set is expected to be expected.
- the channel error protection level of the currently and previously set audio channel the starting values can be adjusted. Has the currently set audio channel higher channel error protection than the previously set, then there is less Error concealment necessary than was previously required.
- the start values are either from the current Number of transmission errors of the set digital Audio channel or from a transmission error number of one previously set digital audio channel. In the The number of transmission errors, the bit error rate and / or flow the number of scale factor errors and / or the number of Checksum error on. By comparing the Channel error protection levels of the first and second audio channels the start values are adjusted accordingly.
- the Channel error protection level indicates how much data the User data can be added to the receiving end Recognize transmission errors or to correct.
- the radio receiver is a digital receiver in which Is able to receive both DAB and FM. Then the Error concealment if initially an FM audio channel was selected and then a DAB channel, through a Sniffer function prepared. That in short The radio receiver checks the time periods Number of transmission errors with equivalent digital Audio channels to in case of deterioration Switch the reception quality of the FM channel automatically. This also applies in the opposite case, if at a poor reception situation with DAB to an equivalent FM audio channel is switched. Here then during of a frame the reception quality of equivalent FM channels determined. Such equivalent channels are called Accompanying information with or are in the Broadcast receiver already saved.
- the reception quality can vary from the reception field strength (Signal field strength), the synchronization attempts, the Baseband energy and other parameters can be determined.
- This reception quality is specified with a Quality measure compared, which is determined empirically. is the reception quality better than the quality measure, then lies the reception quality is acceptable below the quality measure, then at an existing one digital audio channel switched to this, provided the digital audio channel has a number of transmission errors, which enables good reception (no muting).
- the FM channel can be a digital carrier (RDS), which is used to determine the number of transmission errors can be used.
- Method step 18 If it was found in method step 16 that no digital audio channel had been set and therefore none Number of transmission errors for the initialization of the Error concealment, then in Method step 18 the currently calculated Number of transmission errors resulting from the bit error rate, which results from the channel decoding, the Number of checksum errors caused by a CRC (Cyclic Redundancy Check) is calculated and the Number of scale factors errors calculated. With that the Initialization with start values in method step 20 started, then in process step 21 again Error concealment with currently calculated Continuing transmission error numbers.
- CRC Cyclic Redundancy Check
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Computational Linguistics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Circuits Of Receivers In General (AREA)
- Noise Elimination (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Claims (6)
- Procédé pour masquer des erreurs de transmission dans des données audio numériques, selon lequel un premier canal audio est sélectionné (12), les données audio numériques transmises sont reçues (13) dans ce premier canal audio, un décodage de canal est réalisé (14) sur les données audio numériques reçues, les données audio numériques sont ensuite soumises à un décodage de la source, un masquage des erreurs est initialisé (15) à l'aide de valeurs de départ, le masquage des erreurs est ajusté aux données audio numériques par une première qualité de réception du premier canal audio et le masquage (21) des erreurs de transmission est réalisé dans les données audio numériques après le décodage de canal (14),
caractérisé en ce que
les valeurs de départ sont calculées à partir d'une deuxième qualité de réception des données audio numériques transmises dans un deuxième canal audio qui avait été sélectionné avant le premier canal audio. - Procédé selon la revendication 1,
caractérisé en ce que
de plus les niveaux de contrôle d'erreurs de canal sur le premier et le deuxième canal audio sont comparés et les valeurs de départ sont ajustées en fonction de la comparaison. - Procédé selon la revendication 1 ou 2,
caractérisé en ce que
la première et la deuxième qualité de réception des données audio numériques sont déterminées à partir du taux d'erreurs de bits et/ou du nombre d'erreurs de facteurs de cadrage et/ou du nombre d'erreurs de total de contrôle. - Procédé selon l'une des revendications précédentes,
caractérisé en ce que
le masquage des erreurs est réalisé par une correction. - Procédé selon l'une des revendications 1, 2, 3 ou 4,
caractérisé en ce que
la durée de mémorisation de la deuxième qualité de réception des données audio numériques est comparée à une valeur seuil et, lorsque la durée dépasse la valeur seuil, la deuxième qualité de réception est effacée et seule la première qualité de réception est utilisée pour initialiser le masquage des erreurs. - Utilisation d'un récepteur radio pour exécuter le procédé selon l'une des revendications 1 à 5,
caractérisée en ce que
le récepteur radio présente des moyens pour exécuter le procédé, un récepteur à haute fréquence (2) et des moyens destinés à la restitution acoustique (9, 10).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10034783A DE10034783A1 (de) | 2000-07-18 | 2000-07-18 | Verfahren zur Fehlerverschleierung von Übertragungsfehlern in digitalen Audiodaten |
| DE10034783 | 2000-07-18 | ||
| PCT/DE2001/002557 WO2002007149A1 (fr) | 2000-07-18 | 2001-07-13 | Procede pour le masquage d'erreurs dans des champs de transmission de donnees audio numeriques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1303856A1 EP1303856A1 (fr) | 2003-04-23 |
| EP1303856B1 true EP1303856B1 (fr) | 2004-10-06 |
Family
ID=7649242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01953895A Expired - Lifetime EP1303856B1 (fr) | 2000-07-18 | 2001-07-13 | Procede pour le masquage d'erreurs dans des champs de transmission de donnees audio numeriques |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1303856B1 (fr) |
| JP (1) | JP4813747B2 (fr) |
| CA (1) | CA2415424C (fr) |
| DE (2) | DE10034783A1 (fr) |
| ES (1) | ES2228914T3 (fr) |
| WO (1) | WO2002007149A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7835916B2 (en) | 2003-12-19 | 2010-11-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Channel signal concealment in multi-channel audio systems |
| SE527866C2 (sv) * | 2003-12-19 | 2006-06-27 | Ericsson Telefon Ab L M | Kanalsignalmaskering i multikanalsaudiosystem |
| EP3340497A1 (fr) * | 2016-12-22 | 2018-06-27 | Nxp B.V. | Dissimulation d'erreur avec des flux de données redondants |
| EP3340498B1 (fr) | 2016-12-22 | 2022-07-13 | Nxp B.V. | Information de qualité de voie de réception |
| WO2021200151A1 (fr) * | 2020-03-30 | 2021-10-07 | ソニーグループ株式会社 | Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2507972B2 (ja) * | 1993-08-20 | 1996-06-19 | 日本電気株式会社 | 回線品質監視装置 |
| JPH08242215A (ja) * | 1995-03-06 | 1996-09-17 | Mitsubishi Electric Corp | ディジタル音声放送受信機 |
| JP3345557B2 (ja) * | 1996-10-14 | 2002-11-18 | アルパイン株式会社 | デジタルオーディオ放送受信装置及び受信方法 |
| DE19959037B4 (de) * | 1999-12-08 | 2004-04-29 | Robert Bosch Gmbh | Verfahren zur Dekodierung von digitalen Audiodaten |
-
2000
- 2000-07-18 DE DE10034783A patent/DE10034783A1/de not_active Ceased
-
2001
- 2001-07-13 DE DE50104018T patent/DE50104018D1/de not_active Expired - Lifetime
- 2001-07-13 JP JP2002512969A patent/JP4813747B2/ja not_active Expired - Fee Related
- 2001-07-13 ES ES01953895T patent/ES2228914T3/es not_active Expired - Lifetime
- 2001-07-13 WO PCT/DE2001/002557 patent/WO2002007149A1/fr active IP Right Grant
- 2001-07-13 EP EP01953895A patent/EP1303856B1/fr not_active Expired - Lifetime
- 2001-07-13 CA CA002415424A patent/CA2415424C/fr not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE50104018D1 (de) | 2004-11-11 |
| ES2228914T3 (es) | 2005-04-16 |
| WO2002007149A1 (fr) | 2002-01-24 |
| JP2004504744A (ja) | 2004-02-12 |
| JP4813747B2 (ja) | 2011-11-09 |
| EP1303856A1 (fr) | 2003-04-23 |
| CA2415424A1 (fr) | 2003-01-08 |
| CA2415424C (fr) | 2007-10-02 |
| DE10034783A1 (de) | 2002-02-07 |
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