EP0609300A1 - Procede de transmission ou de memorisation d'un signal audio code numerise compose d'une sequence de blocs d'informations, par des canaux brouilles. - Google Patents

Procede de transmission ou de memorisation d'un signal audio code numerise compose d'une sequence de blocs d'informations, par des canaux brouilles.

Info

Publication number
EP0609300A1
EP0609300A1 EP92921545A EP92921545A EP0609300A1 EP 0609300 A1 EP0609300 A1 EP 0609300A1 EP 92921545 A EP92921545 A EP 92921545A EP 92921545 A EP92921545 A EP 92921545A EP 0609300 A1 EP0609300 A1 EP 0609300A1
Authority
EP
European Patent Office
Prior art keywords
information
units
encoded
error protection
audio signal
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.)
Granted
Application number
EP92921545A
Other languages
German (de)
English (en)
Other versions
EP0609300B1 (fr
Inventor
Detlef Wiese
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institut fuer Rundfunktechnik GmbH
Original Assignee
Institut fuer Rundfunktechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Institut fuer Rundfunktechnik GmbH filed Critical Institut fuer Rundfunktechnik GmbH
Publication of EP0609300A1 publication Critical patent/EP0609300A1/fr
Application granted granted Critical
Publication of EP0609300B1 publication Critical patent/EP0609300B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/95—Arrangements characterised by the broadcast information itself characterised by a specific format, e.g. an encoded audio stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation

Definitions

  • the invention relates to a ner driving according to the preamble of claim 1.
  • a ner driving is known from the earlier patent application P 41 11 131.1.
  • bit-saving source codes are usually used before the channel coding, which are based on a reduction in redundancy and irrelevance.
  • the digitally sampled audio signal is processed using a filter bank
  • sampled values 25 subband samples and / or converted to spectral samples using a frequency domain transform.
  • additional and control information such as, for example, scale factors, scale factor selection information and bit allocation information
  • Binary digits within an information block produce a different subjective interference effect on the listener.
  • the disruption of a bit assignment in the radio channel can briefly lead to a complete failure on the playback side and thus to a muting of the audio signal of a certain duration.
  • This control information must therefore be protected considerably more than the encoded samples.
  • the listener can only perceive a bit error of a small binary position of the encoded sample with difficulty and sometimes even not at all.
  • the object of the invention is to provide, in a method of the type mentioned at the outset, a channel coding which is optimized with regard to minimal subjective interference, minimum data rate and maximum error protection.
  • the invention is based on the consideration of using the different meaning of the information units within each information block for a continuously graduated, variable error protection in such a way that certain interference patterns result from transmission disturbances, which can be determined by suitable ones
  • Fig. 1 is a schematic representation of a in the invention
  • Method used information block which consists of a sequence of nine information units with different error protection
  • Fig. 2 is a schematic representation similar to that in Fig. 1 for a alternative embodiment
  • FIG. 3 shows a schematic representation of the two channels of a stereophonic audio signal which is channel-coded according to the inventive method according to FIG. 2 after channel decoding.
  • a sub-band method is used as the source coding method, in which the frequency band of the digitized audio signal is split into a plurality of sub-bands. Each subband is assigned to one of six subband groups. The bit allocation and thus data reduction of the sample values of each subband is carried out according to psychoacoustic aspects (monitoring threshold calculation). The peak value of the amount of these samples is determined in each sub-band for a certain number of consecutive samples and is quantified as a so-called "scale factor" and recorded together with the data-reduced ones
  • Such a data-reduced, channel-coded audio signal 1 is shown schematically in the figure and consists of a large number of successive information blocks 10.
  • the information blocks 10 are preferably of the same length and each comprise a sequence of nine information units 11 to 19 in the example shown.
  • the nine information units 11 to 19 contain the following information in accordance with the source coding scheme under consideration: Unit 11 bit allocation information
  • Unit 12 scale factor selection information
  • the individual information units 11 to 19 are assigned a varying bit error protection 21 to 29 during the channel coding.
  • the bit allocation information 11 and the scale factor selection information 12 require a high level of error protection 21 and 22, respectively, since bit errors within these information units can lead to a complete destruction of the audio signal at the output of the source decoder. Since disrupted scale factors 13 subjectively are extremely disruptive, they also require a relatively high level of error protection 23.
  • Subband groups No. 1 to No. 6, which are shown as information units 14 to 19, are treated differently with regard to their error protection 24 to 29.
  • the subband samples of the subbands of the lower frequency range are in the information unit 14, those of the highest frequency range to be transmitted are in the information unit 19.
  • FIG. 2 An application of this better error detection is shown in FIG. 2 using a two-channel, stereophonic audio signal. In each of the two channels No. 1 and No. 2, three successive information blocks 110, 120, 130 and 210, 220, 230 are illustrated. Each of these blocks, as shown for block 10 in FIG. 1, consists of nine information units.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Error Detection And Correction (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

Des signaux audio codés numérisés à transmettre par des canaux brouillés se composent d'une série de blocs d'informations constitués par des unités d'information ayant divers contenus informationnels tels que des informations de commande, des informations concernant le facteur de cadrage et des informations sur des valeurs d'analyse codées à la source par transformation et/ou par codage en bandes partielles. Les unités contenant les informations sur les valeurs codées d'analyse sont associées à une structure spectrale déterminée. Le signal audio codé est soumis avant sa transmission ou sa mémorisation à un codage par canal adapté à la protection voulue contre des erreurs, de sorte que lorsque des erreurs sont détectées, les erreurs sont corrigées, et lorsque les erreurs ne peuvent pas être corrigées, elles sont masquées. Pour coder par canal les unités d'information concernant les valeurs codées d'analyse, une protection variable contre des défauts binaires est assurée en fonction de l'attribution des unités d'information individuelles à une structure spectrale déterminée, en ce sens que la protection contre des erreurs binaires d'unités d'information concernant les valeurs codées d'analyse appartenant à des fractions de plus basse fréquence du signal audio est plus forte que la protection d'unités d'information concernant les valeurs codées d'analyse de fractions de plus haute fréquence du signal audio. La protection variable contre des erreurs, à sélectionner pour chaque unité d'information, est déterminée en outre en fonction de la durée et de la fréquence admissibles, selon des critères subjectifs, du masquage d'erreurs mis en oeuvre.
EP92921545A 1991-10-24 1992-10-20 Procede de transmission ou de memorisation d'un signal audio code numerise compose d'une sequence de blocs d'informations, par des canaux brouilles Expired - Lifetime EP0609300B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4135070A DE4135070C1 (fr) 1991-10-24 1991-10-24
DE4135070 1991-10-24
PCT/EP1992/002401 WO1993008656A1 (fr) 1991-10-24 1992-10-20 Procede de transmission ou de memorisation d'un signal audio code numerise compose d'une sequence de blocs d'informations, par des canaux brouilles

Publications (2)

Publication Number Publication Date
EP0609300A1 true EP0609300A1 (fr) 1994-08-10
EP0609300B1 EP0609300B1 (fr) 1996-09-11

Family

ID=6443299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92921545A Expired - Lifetime EP0609300B1 (fr) 1991-10-24 1992-10-20 Procede de transmission ou de memorisation d'un signal audio code numerise compose d'une sequence de blocs d'informations, par des canaux brouilles

Country Status (9)

Country Link
US (1) US5440584A (fr)
EP (1) EP0609300B1 (fr)
AT (1) ATE142828T1 (fr)
AU (1) AU2769192A (fr)
CA (1) CA2122011C (fr)
DE (2) DE4135070C1 (fr)
DK (1) DK0609300T3 (fr)
ES (1) ES2090697T3 (fr)
WO (1) WO1993008656A1 (fr)

Cited By (1)

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WO1998048531A1 (fr) * 1997-04-23 1998-10-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede de masquage des erreurs dans un courant de donnees audio

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DE4202140A1 (de) * 1992-01-27 1993-07-29 Thomson Brandt Gmbh Verfahren zur uebertragung digitaler audio-signale
US5642437A (en) * 1992-02-22 1997-06-24 Texas Instruments Incorporated System decoder circuit with temporary bit storage and method of operation
US5729556A (en) * 1993-02-22 1998-03-17 Texas Instruments System decoder circuit with temporary bit storage and method of operation
DE4327588A1 (de) * 1993-08-17 1995-02-23 Thomson Brandt Gmbh Verfahren zur Übertragung oder Demodulation eines digitalen Signals und Demodulator zur Decodierung dieses Signals
DE4335305A1 (de) * 1993-10-16 1995-04-20 Philips Patentverwaltung Verfahren und Schaltungsanordnung zur Übertragung von Sprachsignalen
WO1995027335A1 (fr) * 1994-04-01 1995-10-12 Sony Corporation Methode et dispositif de codage et de decodage d'informations, methode de transmission d'informations et support d'enregistrement de l'information
DE4417993A1 (de) * 1994-05-21 1995-12-07 Bosch Gmbh Robert Verfahren zur Übertragung von digitalen Audio-Signalen und Vorrichtung zur Übertragung digitaler Audio-Signale
US5617541A (en) * 1994-12-21 1997-04-01 International Computer Science Institute System for packetizing data encoded corresponding to priority levels where reconstructed data corresponds to fractionalized priority level and received fractionalized packets
US6775652B1 (en) 1998-06-30 2004-08-10 At&T Corp. Speech recognition over lossy transmission systems
EP1303918B1 (fr) * 2000-07-17 2010-11-03 Koninklijke Philips Electronics N.V. Signalisation d'information d'importance de signal entre une couche d'application et un codeur canal
US7132100B2 (en) 2002-06-14 2006-11-07 Medimmune, Inc. Stabilized liquid anti-RSV antibody formulations
US7425618B2 (en) 2002-06-14 2008-09-16 Medimmune, Inc. Stabilized anti-respiratory syncytial virus (RSV) antibody formulations
EP1613160A4 (fr) 2003-03-27 2008-01-02 Ptc Therapeutics Inc Ciblage d'enzymes du trajet d'epissage d'arnt pour l'identification de molecules anti-fongiques et/ou anti-proliferatives
AU2004229501B2 (en) 2003-04-11 2011-08-18 Medimmune, Llc Recombinant IL-9 antibodies and uses thereof
AU2005249360B2 (en) 2004-04-12 2011-07-21 Medimmune, Llc Anti-IL-9 antibody formulations and uses thereof
US7351739B2 (en) 2004-04-30 2008-04-01 Wellgen, Inc. Bioactive compounds and methods of uses thereof
DK2497492T3 (en) 2004-06-01 2018-11-26 Icahn School Med Mount Sinai Genetically modified swine influenza virus and its applications
CA2585717A1 (fr) 2004-10-27 2006-05-04 Medimmune Inc. Modulation d'une specificite d'anticorps par adaptation sur mesure de son affinite a un antigene apparente
EP1999148B8 (fr) 2006-03-06 2014-03-05 Medlmmune, LLC Anticorps humanisés dirigés contre l'antigène cd22 et leur utilisation à des fins thérapeutiques en oncologie, ainsi que dans le cadre de transplantations et de maladies auto-immunes
AU2008247382B2 (en) 2007-05-07 2014-06-05 Medimmune, Llc Anti-ICOS antibodies and their use in treatment of oncology, transplantation and autoimmune disease
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JP5933975B2 (ja) 2008-11-12 2016-06-15 メディミューン，エルエルシー 抗体製剤
CA2769822C (fr) 2009-08-13 2019-02-19 The Johns Hopkins University Methodes de modulation de la fonction immunitaire
US9873674B2 (en) 2012-09-21 2018-01-23 Cornell University C-Rel inhibitors and uses thereof
US20150359853A1 (en) 2012-10-24 2015-12-17 Admune Therapeutics Llc Il-15r alpha forms, cells expressing il-15r alpha forms, and therapeutic uses of il-15r alpha and il-15/il-15r alpha complexes
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WO1998048531A1 (fr) * 1997-04-23 1998-10-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede de masquage des erreurs dans un courant de donnees audio
US6421802B1 (en) 1997-04-23 2002-07-16 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Method for masking defects in a stream of audio data

Also Published As

Publication number Publication date
AU2769192A (en) 1993-05-21
CA2122011A1 (fr) 1993-04-29
DE4135070C1 (fr) 1993-05-19
EP0609300B1 (fr) 1996-09-11
US5440584A (en) 1995-08-08
CA2122011C (fr) 1999-06-08
ES2090697T3 (es) 1996-10-16
DK0609300T3 (da) 1996-11-25
ATE142828T1 (de) 1996-09-15
DE59207139D1 (de) 1996-10-17
WO1993008656A1 (fr) 1993-04-29

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