专利名称：Waveform compressing apparatus,
waveform decompressing apparatus, andmethod of producing compressed data
发明人：Okazaki, Masatsugu申请号：EP08100017.6申请日：20080102公开号：EP1942490A1公开日：20080709
专利附图：
摘要：In a waveform compressing apparatus, a trial mode selecting portion selects atrial mode having the highest compression rate from a plurality of candidate modes
which 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：YAMAHA CORPORATION
地址：10-1, Nakazawa-cho Naka-ku Hamamatsu-shi Shizuoka 430-8650 JP
国籍：JP
代理机构：Kehl, Günther
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