| 摘要 |
The invention relates to a method for decompressing a compressed audio signal. In the compression of an audio signal, samples are taken of the audio signal, which are compiled into sets of numerical values. From at least one codebook, an index corresponding to each set of numerical values is searched for, and the symbol of the index is transmitted to the decompressing device. In the method, a decoding table corresponding to said at least one codebook is used, the decoded sets of numerical values being determined on the basis of the decoded index. In the method, said at least one decoding table is formed by determining a codeword for each index in the decoding table, selecting a storage location for each numerical value of the set of numerical values in said codeword, determining the values of the set of numerical values corresponding to each index in the codebook, and placing the value of each numerical value in the codeword corresponding to the index of the decoding table, in the location reserved for it in the codeword, wherein in decompressing of the audio signal, the codeword corresponding to the index of the symbol is searched for in the decoding table, and a value for each numerical value is searched for in said location reserved for the numerical value in the codeword. Thus, in the decompression of the compressed audio signal, the codeword corresponding to the index of the symbol is searched for in the decoding table, and a value for each numerical value is retrieved from said location allocated for the numerical value in the codeword.
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