Method in the decompression of an audio signal

Details Method in the decompression of an audio signal Method in the decompression of an audio signal

2007-01-09

2007-01-09

Lerner, Martin (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S500000, C704S501000

Reexamination Certificate

active

10137776

ABSTRACT:
The invention relates to a method in the decompression of a compressed audio signal. In the decompression, a predicting coding has been used, wherein samples taken of the audio signal have been formed into frames, and the samples of the frames have been compared with past samples to find out the prediction error. In the method, frames (frn, frn−1, frn−2) of the compressed audio signal are stored, and a predicting decoding is used to decompress the audio signal compressed with the predicting coding, on the basis of said stored frames (frn, frn−1, frn−2). In the method, at least one memory pointer is used to indicate the storage location of the frames (frn, frn−1, frn−2). Said memory pointers (P1, P2) are used to point to the storage location of the frame (frn−1) preceding the frame (frn) being processed at the time, and to the storage location of the frame (frn−2) preceding said past frame (frn−1).

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“A Novel MPEG-2 Audio Decoder with Efficient Data Arrangement and Memory Configuration,” IEEE Transactions on Consumer Electronics, IEEE Inc. New York, vol. 43, No. 3, Aug. 1, 1997, pp. 598-604.

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