| 摘要 |
An MPEG audio encoding method, a method for determining a window type when encoding MPEG audio, a psychoacoustic modeling method when encoding MPEG audio, an MPEG audio encoding apparatus, an apparatus for determining a window type when encoding MPEG audio, and a psychoacoustic modeling apparatus in an MPEG audio encoding system are provided. The MPEG audio encoding method comprises performing modified discrete cosine transform (MDCT) on an input audio signal in a time domain; with the MDCT performed MDCT coefficients as an input, performing psychoacoustic model; and by using the result of performing the psychoacoustic model, performing quantization, and packing a bitstream. According to the method, complexity of computation can be reduced and waste of bits can be prevented.
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