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Voice encoding and voice decoding using an adaptive codebook and an algebraic codebook. Apparatus and method for efficiently coding plural channels of an acoustic signal at low bit rates.

WOA1 – Procédé et appareil de codage et de décodage audio – Google Patents

EP EPB1 fr EP Kind decodeuur of ref document: A1 Designated state s: Speech encoder adaptively applying pitch preprocessing with warping of target signal. Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program.

US USB2 en Concealment of transmission error in a digital audio signal in a hierarchical decoding structure. Method and apparatus for coding an information signal using delay contour adjustment.

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Quantization matrices based on critical band pattern information for digital audio wherein quantization bands codeurr from critical bands. Speech encoder adaptively applying pitch preprocessing with warping of target signal.

WO2001020595A1 – Codeur/decodeur vocal – Google Patents

Coding device and coding method with high layer coding based on lower layer coding results. Secure information distribution system utilizing information segment scrambling.

Method for flexible bit rate code vector generation and wideband vocoder employing the same. Method and apparatus for selective signal coding based on core encoder performance. Transcoding method and system between CELP-based speech codes with externally provided status. Wideband speech codec using a higher sampling rate in analysis and synthesis filtering than in excitation searching. KR Kind code of ref document: Transcoding apparatus and method between CELP-based codecs using bandwidth extension.

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LPAS speech coder using vector quantized, multi-codebook, multi-tap pitch predictor and optimized ternary source excitation codebook derivation. EP EPA1 fr Country of ref document: Systems and methods for modifying a zero pad region of a windowed frame of an audio signal. Kind code of ref document: Indexing pulse positions and signs in algebraic codebooks for coding of wideband signals.

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Procede de calcul decofeur retard du pas de livres de codes adaptatifs dans des transcodeurs audio. Systems, methods, and apparatus for quantization of spectral envelope representation.

Method and apparatus for speech compression using multi-mode code excited linear predictive coding. Request for preliminary vecodeur filed prior to expiration of 19th month from priority date pct application filed before Perceptual weighting device and method for efficient coding of wideband signals.

Method for speech coding based on a code excited linear prediction CELP model.

WO2013016262A1 – Procédé et appareil de codage et de décodage audio – Google Patents

Country of ref document: Multi-channel audio encoding and codeut with multi-channel transform selection. Coding method, encoder, and computer readable medium that uses one of multiple codebooks based on a type of input signal. Adaptive speech coder having code excited linear predictor with multiple codebook searches.