AUDIO KODIERER MIT UNREGELMÄSSIGER FILTERBANK

A method of encoding an audio signal (x(n)) comprises providing the signal (x(n)) as an input to a uniform cosine modulated filter bank (10). A non-uniform segmentation is determined for the filter bank wherein at least one group of three or more filters are to be combined for at least one time inte...

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Bibliographic Details
Main Authors NIAMUT, OMAR, A, HEUSDENS, RICHARD
Format Patent
LanguageGerman
Published 15.04.2006
Edition7
Subjects
ACOUSTICS
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
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
TRANSMISSION
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Summary:A method of encoding an audio signal (x(n)) comprises providing the signal (x(n)) as an input to a uniform cosine modulated filter bank (10). A non-uniform segmentation is determined for the filter bank wherein at least one group of three or more filters are to be combined for at least one time interval of the audio signal. The at least one group of filters are combined with a respective segmentation matrix (S1 . . . Sx), each matrix comprising a pxp principal submatrix of a Hadamard matrix, where p is equal to the number of filters to be combined in a group. The output of the filters and the segmentation matrices as well as respective indications of the segmentation are then encoded in a bitstream.
Bibliography:Application Number: AT20020755519T