SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/ENCODING APPARATUS, SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/ENCODING METHOD, WIRELESS TRANSMISSION SYSTEM, SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/DECODING APPARATUS, SUB-BAND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION/DECODING METHOD, AND WIREL

摘要

A sub-band adaptive differential pulse code modulation/encoding apparatus includes means (102, 103, 104, 105) having a predetermined asymmetric impulse response for receiving an audio signal and band-dividing the received audio signal into a predetermined number of sub-bands, so as to obtain a plurality of band-divided sub-band audio signal, a plurality of quantization means (110, 111, 112, 113) for quantizing the band-divided sub-band audio signals by a predetermined divider, and encoding means (115) for performing adaptive differential pulse code modulation/encoding of the quantized sub-band audio signals.