METHOD AND DEVICE FOR ENCODING SIGNAL, SIGNAL TRANSMITTING METHOD, SIGNAL RECORDING MEDIUM, AND METHOD AND DEVICE FOR DECODING SIGNAL

摘要

Time-series sampled data of the input signal are grouped (SO1); the data are converted into spectrum data by MDCT (SO2); in order to divide the spectrum data into units, a code table is selected for every unit (SO6); the spectrum data are encoded by quantization using the code tables (SO8); and the encoded spectrum data, the identification signals of the code tables, the normalization coefficients and the number of steps of quantization are outputted (SO9). It is also possible to select a code table for every frame. Thus, the hardware scale of the encoder can be effectively reduced and the encoding efficiency of the encoder can be effectively improved.