Patent ID: 7426462
Filing Date: 2008-09-16
Classification: G10L,H03M

Abstract:
1. A method comprising: determining a largest absolute value (LAV) within a group of data; identifying, based on the LAV, a difference table to be used for selecting an optimal Huffman codebook for the group of data, the difference table being associated with two of a plurality of Huffman codebooks, wherein each entry in the difference table contains a length difference value that is a difference between corresponding code length entries in the two associated Huffman codebooks; calculating one or more indexes for the group of data using an expression associated with the two of the plurality of Huffman codebooks; determining a size difference value for the group of data using the one or more indexes and the difference table; selecting one of the two of the plurality of Huffman codebooks based on the determined size difference value; and encoding the group of data using the selected Huffman codebook to output an encoded audio signal.