G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 19/02 (2006.01) G10L 21/02 (2006.01)
Patent
CA 2424375
The invention relates to encoding of broadband and narrowband acoustic source signals (x) such that the perceived sound quality of corresponding reconstructed signals is improved in comparison to the known solutions. An enhancement estimation unit (102), operating in serial or in parallel with the regular encoding / decoding means (101), perceptually enhances a reconstructed acoustic source signal by utilisation of an enhancement spectrum (C) comprising a larger number of spectral coefficients than the number of sample values in corresponding frames of the signals carrying the basic encoded representation of the acoustic source signal. The thus extended block length of the enhancement spectrum frame provides a basis for accomplishing the desired improvement of the perceived sound quality.
L'invention concerne le codage de signal source acoustique bande large et étroite (x), améliorant la qualité de perception sonore des signaux correspondants reconstruits, par rapport aux techniques existantes. Une unité d'estimation d'amélioration (102), fonctionnant en série ou en parallèle avec le système classique de codage/décodage (101), améliore la perception d'un signal source acoustique par la biais d'un spectre d'amélioration (CE) qui comprend un nombre de coefficients spectraux supérieur au nombre des valeurs d'échantillon dans les trames correspondantes des signaux acheminant la représentation fondamentale codée du signal source. La longueur de bloc ainsi étendue de la trame du spectre d'amélioration permet d'apporter l'amélioration souhaitée à la qualité de perception sonore.
Andersson Susanne
Bruhn Stefan
Ericsson Canada Patent Group
Telefonaktiebolaget Lm Ericsson
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