APPARATUS AND METHOD FOR ENCODING AND DECODING USING BANDWIDTH EXTENSION IN PORTABLE TERMINAL

An apparatus and method for encoding and decoding using mutual information between a high band signal and a low band signal to increase a coding efficiency in a portable terminal are provided. The apparatus includes a bandwidth extender for extracting auxiliary information relating to a characterist...

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Hauptverfasser: MARTYNOVICH, PAVEL, AHN, CHUL-YONG, SONG, GEUN-BAE
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creator MARTYNOVICH, PAVEL
AHN, CHUL-YONG
SONG, GEUN-BAE
description An apparatus and method for encoding and decoding using mutual information between a high band signal and a low band signal to increase a coding efficiency in a portable terminal are provided. The apparatus includes a bandwidth extender for extracting auxiliary information relating to a characteristic of a high band signal using the high band signal and a low band signal and an encoder for encoding residual high band signal obtained by subtracting auxiliary information acquired from the low band signal from auxiliary information acquired from the high band signal. L'invention concerne un appareil et un procédé permettant d'effectuer un codage et un décodage au moyen d'informations mutuelles entre un signal de bande supérieure et un signal de bande inférieure pour augmenter l'efficacité d'un codage dans un terminal portable. L'appareil comprend une extension de bande passante pour extraire des informations auxiliaires relatives à une caractéristique d'un signal de bande supérieure au moyen du signal de bande supérieure et d'un signal de bande inférieure, et un codeur pour coder le signal résiduel de bande supérieure obtenu en soustrayant les informations auxiliaires acquises à partir du signal de bande inférieure des informations auxiliaires acquises à partir du signal de bande supérieure.
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subjects ACOUSTICS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MUSICAL INSTRUMENTS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
title APPARATUS AND METHOD FOR ENCODING AND DECODING USING BANDWIDTH EXTENSION IN PORTABLE TERMINAL
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