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Audio processing method and apparatus by utilizing a partition domain spreading function table stored in three linear arrays for reducing storage
Audio processing method and apparatus by utilizing a partition domain spreading function table stored in three linear arrays for reducing storage
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机译:利用存储在三个线性阵列中的分区域扩展功能表来减少存储的音频处理方法和装置
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摘要
An audio processing method is disclosed. In the audio processing method, a modified discrete cosine transform (MDCT) algorithm is utilized to transform a present time domain audio signal into a spectrum audio signal. A spreading function (SF) coefficient of each partition domain of the spectrum audio signal is obtained by referencing an SF table, wherein the table is stored in three linear arrays based on non-zero SF-Coefficient values. A masking partitioned energy threshold of each partition domain of the spectrum audio signal is calculated utilizing a logarithmic scale. An audio block type of each partition domain and an SMR of the spectrum audio signal are calculated. Subsequently, the spectrum audio signal is compressed into an audio bit stream according to the audio block type of each partition domain and the SMR. In addition, an audio signal processing apparatus is also disclosed in this invention.
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