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US 2002/0165710 A1Published application
Method in the decompression of an audio signal
AssigneeNokia Corporation
InventorJuha Ojanpera
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AssigneeNokia Corporation
InventorJuha Ojanpera
Estimating the term…
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).
A method in the decompression of a compressed audio signal, in which compression a predicting coding has been used, wherein samples taken from the audio signal have been formed into frames, and samples of the frames have been compared with samples of at least one previous frame to find out the prediction error, in which method frames of the compressed audio signal are stored, and predicting decoding is used to decompress the audio signal compressed with the coding on the basis of said stored frames, wherein at least a first and a second memory pointer are used to point to the storage location of the frames, and that said memory pointers are used to point to the storage location of the frame preceding the frame processed at the time, and to the storage location of the frame preceding said past frame.
A decompressing device for decompressing a compressed audio signal, in which compression a predicting coding has been used, wherein samples taken from the audio signal have been formed into frames, and samples of the frames have been compared with samples of at least one past frame to find out the prediction error, which decompressing device comprises memory means for forming at least one buffer for storing frames of the compressed audio signal, and means for performing the predicting decoding in the decompression of the audio signal compressed with the coding on the basis of said stored frames, wherein the decompressing device comprises at least a first and a second memory pointer to point to the storage location of the frames, and means for using said memory pointers to point to the storage location of the frame preceding the frame processed at the time, and to the storage location of the frame preceding said past frame.
An electronic device comprising a decompressing device for decompressing a compressed audio signal, in which compression a predicting coding has been used, wherein samples taken from the audio signal have been formed into frames, and samples of the frames have been compared with samples of at least one past frame to find out the prediction error, which electronic device comprises memory means for forming at least one buffer for storing frames of the compressed audio signal, and means for performing the predicting decoding in the decompression of the audio signal compressed with the coding on the basis of said stored frames, wherein the electronic device comprises at least a first and a second memory pointer to indicate the storage location of the frames, and means for using said memory pointers to point to the storage location of the frame preceding the frame processed at the time, and to the storage location of the frame preceding said past frame.
Dependencies are inferred from the claim text.