WAVEFORM COMPRESSING APPARATUS, WAVEFORM DECOMPRES

专利名称：WAVEFORM COMPRESSING APPARATUS,

WAVEFORM DECOMPRESSING APPARATUS,AND METHOD OF PRODUCINGCOMPRESSED DATA

发明人：Masatsugu Okazaki申请号：US11965539申请日：20071227

公开号：US20080167882A1公开日：20080710

专利附图：

摘要：In a waveform compressing apparatus, a trial mode selecting portion selects a

trial mode having the highest compression rate from a plurality of candidate modeswhich have not been selected before as a trial mode for generating a residue code. Awaveform data compressing portion compresses a given data amount of originalwaveform data according to the selected trial mode so as to generate the residue code,the data amount being determined in correspondence with the selected trial mode. Awaveform data restoring portion generates a restored waveform data from the

compressed data using the generated residue code. A determining portion measures anevaluation value of a quantization error contained in the restored waveform data relativeto the original waveform data, and determines whether the evaluation value is equal to orsmaller than a predetermined allowable value. A mode change instructing portionoutputs a mode change instruction for instructing the trial mode selecting portion toselect another trial mode when the evaluation value is not smaller than thepredetermined allowable value.

申请人：Masatsugu Okazaki

地址：Hamamatsu-Shi JP

国籍：JP

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