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

Method and apparatus for one-stage and two-stage noise feedback coding of speech and audio signals. Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program.

Indexing pulse positions and signs in algebraic codebooks for coding of wideband signals. Quantization matrices based on critical band pattern information for digital audio wherein quantization bands differ from critical bands. Speech encoder adaptively applying pitch preprocessing with warping of target signal.

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Transcoding decodeug and method between CELP-based codecs using bandwidth extension. Method and apparatus for an encoding and decoding a speech signal by adaptively changing pulse position candidates. Wideband speech codec using a higher sampling rate in analysis and synthesis filtering than in excitation searching.

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

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