SIGNAL PROCESSING DEVICE, METHOD AND PROGRAM

摘要

The present technology relates to a signal processing device, a method and a program which allow for the acquisition of sound with higher acoustic quality when decoding a sound signal. An envelope information generating unit (24) generates envelope information indicative of an envelope shape for the high-frequency components of a sound signal to be encoded. A sine wave information generating unit (26) detects a sine wave signal from the high-frequency components of a sound signal, and generates sine wave information indicative of the start position of the appearance of the sine wave signal. An encoded stream generating unit (27) multiplexes the envelope information, the sine wave information and the low-frequency components of the encoded sound signal, and outputs an encoded stream acquired thereby. Hereby, the receiving side of the encoded stream can estimate with higher accuracy the high-frequency components including the sine wave signal from the envelope information and the sine wave information. The present invention can be applied to a signal processing device.