Method and apparatus for efficiently encoding sinusoid less than masking value according to psychoacoustic model, and method and apparatus for decoding the encoded sinusoid

摘要

psychoacoustic methods to efficiently encode the small sinusoidal signal than the masking value depending on model and equipment, encoded method and apparatus for decoding a sinusoidal signal, and such encoding method / decoding method is readable recording medium recorded with a computer program for executing the computer is started. When encoding the small masking value than the first sine-wave signal according to a psychoacoustic model to be used by increasing the specific code that indicates such a signal, to encode the sinusoidal signal, a third sinusoidal signal of the next frame to be connected to the first sinusoidal signal, , and according to the method of using the specific code using the selected sinusoidal signal carried on the difference coding, the decoding side, so as to obtain a difference value and the sum is transmitted using the selected sine wave signal. Therefore, it is possible to reduce the number of bits required for encoding as compared with the conventional method, this enables efficient encoded.