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AssigneeSony Corporation
InventorsMinoru Tsuji, Shiro Suzuki, Keisuke Toyama
Estimating the term…
A sound signal encoder for high efficiency encoding of sound signals from a plurality of channels is provided which includes a to-be-correlated object setter (52), to-be-correlated object selector (56) and a variable-length encoder (58). The to-be-correlated object setter (52) sets, on the basis of left-channel frequency information held in a left-channel frequency information holder (50) and right-channel frequency information held in a right-channel frequency information holder (51), index [i] indicating which ones of sine waves on the left channel are to be correlated with, namely, are to be subtracted from, sine waves on the right channel. The to-be-correlated object selector (56) selects a default value read from a storage unit (55) or index [i]-th amplitude information read from a left-channel amplitude information holder (53) as an object to be subtracted from the i-th amplitude information on the right channel according to the index [i]. The variable-length encoder (58) makes variable-length encoding of a difference resulted from subtraction of the left-channel amplitude information or default value as the to-be-correlated object from the amplitude information on the right channel.
A method of encoding sound signals from a plurality of channels using a sound signal encoder, said sound signal encoder comprising a plurality of gain controllers and a to-be-correlated object setter, the method comprising the steps of:
A sound signal encoder for encoding sound signals from a plurality of channels, the encoder comprising:
A computer-readable recording medium having recorded therein a program for allowing a computer to encode sound signals from a plurality of channels, the program comprising the steps of:
A recording medium having recorded therein a string of codes generated by a method of encoding sound signals from a plurality of channels, the string of codes being gain control information codes obtained by:
A sound signal decoding method of restoring sound signals from a plurality of channels by generating an arbitrary number of gain control information correspondingly to the amplitude of the sound signals from the plurality of channels for gain control of the sound signals;
A sound signal decoder for restoring sound signals from a plurality of channels by generating an arbitrary number of gain control information correspondingly to the amplitude of the sound signals from the plurality of channels for gain control of the sound signals;
A computer-readable recording medium having recorded therein a program for allowing a computer to restore sound signals from a plurality of channels by generating an arbitrary number of gain control information correspondingly to the amplitude of the sound signals from the plurality of channels for gain control of the sound signals;
Dependencies are inferred from the claim text.