WO2025132526 - TRANSITION BETWEEN TWO DOWNMIXING MODES WITH OPTIMISED LEVEL CONTROL
National phase entry is expected:
Publication Number
WO/2025/132526
Publication Date
26.06.2025
International Application No.
PCT/EP2024/087025
International Filing Date
18.12.2024
Title **
[English]
TRANSITION BETWEEN TWO DOWNMIXING MODES WITH OPTIMISED LEVEL CONTROL
[French]
TRANSITION ENTRE DEUX MODES DE TRAITEMENT DE RÉDUCTION DE CANAUX AVEC CONTRÔLE DE NIVEAU OPTIMISÉ
Applicants **
ORANGE
Inventors
GUÉRIN, Alexandre
LEFORT, Arnaud
RAGOT, Stéphane
Priority Data
FR2315179
22.12.2023
FR
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
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| Number of Multi-Dependent Claims | * |
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| * | |
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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* The data is based on automatic recognition. Please verify and amend if necessary.
** IP-Coster compiles data from publicly available sources. If this data includes your personal information, you can contact us to request its removal.
Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 1978 | |
| EPO | Filing, Examination, Granting | 8524 | |
| Japan | Filing, Examination, Granting | 1985 | |
| South Korea | Filing, Examination, Granting | 1685 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
18,912
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Abstract[English]
The invention relates to a method for processing an audio signal during a transition between a first and a second downmixing mode of a stereophonic signal in order to obtain a monophonic signal, the processing method including the following steps: - applying a determined matching gain (501) to the signal resulting from the downmixing according to the second mode; - applying a crossfade (502), during a transition period, between the signal resulting from the downmixing according to the first mode and the signal resulting from the downmixing according to the second mode modified by applying the matching gain; - progressively varying the matching gain applied to the signal resulting from the second processing mode during the transition period and/or beyond the transition period until converging towards a value of one. The invention also relates to a processing device implementing the method.[French]
L'invention se rapporte à un procédé de traitement d'un signal audio lors d'une transition entre un premier et un deuxième mode de traitement de réduction de canaux d'un signal stéréophonique pour obtenir un signal monophonique, le procédé de traitement comportant les étapes suivantes: - application d'un gain d'adaptation déterminé (501), au signal issu du traitement de réduction de canaux selon le deuxième mode; - application d'un fondu enchainé (502), pendant une durée de transition, entre le signal issu du traitement de réduction de canaux selon le premier mode et le signal issu du traitement de réduction selon le deuxième mode modifié par l'application du gain d'adaptation; - variation progressive du gain d'adaptation appliqué au signal issu du deuxième mode de traitement pendant la durée de transition et/ou au-delà de la durée de transition jusqu'à converger vers une valeur de un. L'invention se rapporte également à un dispositif de traitement mettant en œuvre le procédé.