| 摘要 |
A bit-rate converting apparatus and a method thereof, in which bit-rate conversion is executed by low computational complexity, are provided. The bit-rate conversion is executed in a frequency domain, and psycho-acoustic analysis is not needed by using information included in an inputted bit-stream before the bit-rate conversion is applied. With this, the computational complexity is lowered. And in order that many equal values are not contained in a frequency domain signal, which is inputted to a quantizing means, a quantized value before inverse quantizating is applied is modified, or an inverse quantized value after the inverse quantizing was applied is modified. With this, fine control for the bit-rate is made to be easy.
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