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1. WO2014154988 - OPTIMIZED PARTIAL MIXING OF AUDIO STREAMS ENCODED BY SUB-BAND ENCODING

Publication Number WO/2014/154988
Publication Date 02.10.2014
International Application No. PCT/FR2014/050683
International Filing Date 24.03.2014
IPC
G10L 19/16 2013.01
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
04using predictive techniques
16Vocoder architecture
H04M 3/56 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
3Automatic or semi-automatic exchanges
42Systems providing special services or facilities to subscribers
56Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
CPC
G10L 19/167
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
16Vocoder architecture
167Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
G10L 19/173
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
16Vocoder architecture
173Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding
G10L 19/24
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
16Vocoder architecture
18Vocoders using multiple modes
24Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
H04L 65/1069
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
10Signalling, control or architecture
1066Session control
1069Setup
H04L 65/403
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
40Services or applications
403Arrangements for multiparty communication, e.g. conference
H04L 65/605
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
65Network arrangements or protocols for real-time communications
60Media handling, encoding, streaming or conversion
601Media manipulation, adaptation or conversion
605intermediate
Applicants
  • ORANGE [FR]/[FR]
Inventors
  • LAMBLIN, Claude
  • KOVESI, Balazs
  • NAGLE, Arnault
Agents
  • FROGER Marie-Hélène
Priority Data
1352672 25.03.2013FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) OPTIMIZED PARTIAL MIXING OF AUDIO STREAMS ENCODED BY SUB-BAND ENCODING
(FR) MIXAGE PARTIEL OPTIMISÉ DE FLUX AUDIO CODÉS SELON UN CODAGE PAR SOUS-BANDES
Abstract
(EN)
The invention relates to a method for combining a plurality of audio streams encoded by frequency sub-band encoding, comprising the following steps: decoding (E301) a portion of the encoded streams over at least one frequency sub-band; combining (E302) the streams thus encoded to form a mixed stream; selecting (E303), from among the plurality of encoded audio streams, at least one encoded replication stream, over at least one frequency sub-band that is different from that of the decoding step. The method is such that the selection of the at least one encoded replication stream is carried out according to a criterion which takes into consideration the presence of a predetermined frequency band in the encoded stream (E304). The invention also relates to a device which implements the described method and can be integrated into a conference bridge, a communication terminal or a communication gateway.
(FR)
L'invention se rapporte à un procédé de combinaison d'une pluralité de flux audio codés selon un codage en sous-bandes de fréquence, comportant les étapes suivantes: décodage (E301) d'une partie des flux codés sur au moins une sous-bande de fréquence; addition (E302) des flux ainsi décodés pour former un flux mixé; sélection (E303), parmi la pluralité de flux audio codés, d'au moins un flux codé de réplication, sur au moins une sous-bande de fréquence différente de celle de l'étape de décodage. Le procédé est tel que la sélection du au moins un flux codé de réplication s'effectue selon un critère prenant en compte la présence d'une bande de fréquence prédéterminée dans le flux codé (E304). L'invention se rapporte également à un dispositif mettant en œuvre le procédé décrit et peut s'intégrer à un pont de conférence, un terminal de communication ou une passerelle de communication.
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