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    • 5. 发明申请
    • Compressing Method for Digital Audio Files
    • 数字音频文件的压缩方法
    • US20080215340A1
    • 2008-09-04
    • US11914453
    • 2005-05-25
    • Wen-Yu SuChang-Wci ChenJing-Xin Wang
    • Wen-Yu SuChang-Wci ChenJing-Xin Wang
    • G10L19/00
    • G10L19/0204G10L19/0017
    • A compressing method for digital audio files mainly utilizes a harmonic structure quad tree (HSQT) to re-arrange the frequency coefficient in each frame, and applies concurrent encoding in hierarchical trees (CEIHT) algorithm to increase and simplify the processing speed; the coefficient of the CEIHT is symbolized according to an arithmetic coding; the record of the probability of the symbol is used to determine the number of bits to be stored; the probability is in inverse order of the number of bits requiring storage, and thus increasing the occurrence probability of the symbol may greatly reduce the number of bits to be stored. As a result, the overall compressing method is done in simplified processing procedures and outputting an audio compressed file with a high compression ratio.
    • 数字音频文件的压缩方法主要采用谐波结构四叉树(HSQT)来重新布置每帧中的频率系数,并在层次树(CEIHT)算法中应用并行编码,以增加和简化处理速度; 根据算术编码符号CEIHT的系数; 使用符号概率的记录来确定要存储的比特数; 概率是需要存储的比特数的倒数顺序,因此增加符号的出现概率可能会大大减少要存储的比特数。 结果,整体压缩方法是在简化的处理过程中完成的,并且输出具有高压缩比的音频压缩文件。