A METHOD AND AN APPARATUS FOR ADJUSTING QUANTIZATION QUALITY IN ENCODER AND DECODER

摘要

A method for adjusting quantization quality in encoder. It comprises adjusting the first sample values to be encoded using two or more scale factors, and quantizing the first sample values adjusted to acquire quantized sample values. Then, getting rid of the influence of scale factors for the quantized sample values to get the second sample values, and based on the first sample values and the second sample values to get the global gain. Subsequently, encoding the quantized sample values, the two or more scale factors and the global gain into bit stream. Furthermore, the method for adjusting quantization quality in decoder and the apparatus for adjusting quantization quality in encoder and decoder can reduce the practical complication sharply, and adjust better quantization quality of important section, and acquire better encoding effect.