HYBRID AUDIO SIGNAL ENCODER, HYBRID AUDIO SIGNAL DECODER, METHOD FOR ENCODING AUDIO SIGNAL, AND METHOD FOR DECODING AUDIO SIGNAL

摘要

A hybrid audio signal encoder (100) comprises: a signal analysis unit (404) for determining the encoding method for a frame included in an audio signal; LFD encoders (406, 410) for encoding a frame to generate an LFD frame; an LP encoder (408) for encoding a frame to generate an LP frame; a switching unit (405) for switching encoders in accordance with the determination result by the signal analysis unit (404); and an AC signal generation unit (413) for generating and outputting an AC signal in accordance with a method selected from a plurality of methods, and outputting an AC flag indicative of the selected method.