Enhanced audio coding systems and methods that use a coupling of spectral components and regeneration of spectral components

摘要

A method for encoding the one or more input audio signals, wherein the method comprises: receiving the one or more input audio signals and obtaining, from them, the one or more band signals base and the one or more residual signals, wherein spectral components of a baseband signal represent spectral components of a respective input audio signal in a first set of frequency subbands, and spectral components, in an associated residual signal they represent spectral components of the respective input audio signal in a second set of frequency subbands that are not represented by the baseband signal; obtaining energy measurements of at least some spectral components of the one or more synthesized signals to be generated during decoding, wherein the one or more synthesized signals have spectral components within the second set of frequency subbands; obtaining energy measurements of at least some spectral components of each residual signal; the calculation of scale factors by obtaining square roots of relations of the measures of energy of spectral components in the residual signals to the measures of energy of spectral components in the one or more synthesized signals, of square roots of relations of the measures of energy of spectral components in the one or more synthesized signals, to the measures of energy of spectral components in the residual signals, ratios of square roots of the measures of energy of spectral components in the residual signals, to square roots of the measures of energy of spectral components in the one or more synthesized signals, or square root relationships of the measures of energy of spectral components in the one or more signals synthesized to square roots of the energy measures of spectral components in the residual signals; and assembling the signal information and scale information into an encoded signal, wherein the signal information represents the spectral components in the one or more baseband signals and the scale information represents the scale factors.