Audio encoder for encoding an audio signal having an...

G - Physics – 10 – L

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G10L 19/14 (2006.01)

Patent

CA 2691993

An audio encoder for encod-ing an audio signal includes an impulse extrac-tor (10) for extracting an impulse-like portion from the audio signal. This impulse-like por-tion is encoded and forwarded to an output in-terface (22). Furthermore, the audio encoder includes a signal encoder (16) which encodes a residual signal derived from the original au-dio signal so that the impulse-like portion is re-duced or eliminated in the residual audio signal. The output interface (22) forwards both, the en-coded signals, i.e., the encoded impulse signal (12) and the encoded residual signal (20) for transmission or storage. On the decoder-side, both signal portions are separately decoded and then combined to obtain a decoded audio sig-nal.

La présente invention concerne un codeur audio pour coder un signal audio qui comprend un extracteur d'impulsion (10) pour extraire une partie de type impulsion du signal audio. Cette partie de type impulsion est codée et transmise à une interface de sortie (22). De plus, le codeur audio comprend un encodeur de signal (16) qui code un signal résiduel dérivé du signal audio initial de sorte que la partie de type impulsion soit réduite ou éliminée dans le signal audio résiduel. L'interface de sortie (22) transmet les signaux codés, à savoir le signal d'impulsion codé (12), et le signal résiduel codé (20) pour transmission ou stockage. Côté décodeur, les deux parties du signal sont décodées séparément, puis combinées pour obtenir un signal audio décodé.

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