Patent ID: 8392177

Claim:
A method of encoding a frequency of a sinusoidal signal divided into a plurality of sections, the method comprising: extracting a continuation sinusoidal signal in a current section, which is a sinusoidal signal successive to a sinusoidal signal in a previous section; changing a frequency of the continuation sinusoidal signal at a boundary between the current section and the previous section to a first frequency, based on a representative frequency of the continuation sinusoidal signal and a representative frequency of at least one sinusoidal signal which belongs to a section adjacent to the current section and is successive to the continuation sinusoidal signal; changing a frequency of a previous sinusoidal signal at the boundary between the current section and the previous section to a second frequency, wherein the previous sinusoidal signal belongs to the previous section and is successive to the continuation sinusoidal signal; and encoding the first frequency, wherein the encoding the first frequency comprises calculating a difference between the first frequency and the second frequency.