CPC G10L 19/008 (2013.01) [G10L 19/005 (2013.01); H04L 65/70 (2022.05); H04L 65/80 (2013.01)] | 10 Claims |
3. A decoding method for a terminal apparatus used for multipoint phone connection, the method comprising a decoding step of,
for a time period in which an input code representing a sound signal is a pair of a monaural code and an extension code corresponding to a sound signal of one point, obtaining a provisional decoded sound signal by decoding the monaural code included in the input code representing a sound signal which is the pair by a first decoding scheme, obtaining decoded difference information from the extension code included in the input code representing a sound signal which is the pair, and obtaining C decoded sound signals (C is an integer of 2 or greater) from the provisional decoded sound signal and the decoded difference information by regarding the provisional decoded sound signal as a mixed signal of the C decoded sound signals and regarding the decoded difference information as information corresponding to a difference between the C decoded sound signals, and outputting the C decoded sound signals,
for a time period in which an input code representing a sound signal is one monaural code corresponding to a sound signal of one point, obtaining one decoded sound signal by decoding the one monaural code by the first decoding scheme and outputting the one decoded sound signal, and
for a time period in which an input code representing a sound signal is k monaural codes corresponding to sound signals of k points (k is an integer of 2 or greater), obtaining k decoded sound signals by decoding each of the k monaural codes by the first decoding scheme and outputting the decoded k sound signals.
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