Patent ID: 8781844

Claim:
A method comprising: processing a lower series of samples forming a lower frequency spectral band of the audio signal and multiple different higher series of samples forming multiple different higher frequency spectral bands of the audio signal to parametrically encode the multiple higher series of samples, comprising selecting a respective subset of the lower series of samples for each one of said multiple higher series of samples by; defining a reference higher series of samples forming a reference higher frequency spectral band of the audio signal; determining a reference sub-series of the lower series of samples by searching said lower series of samples using the reference higher series of samples; and selecting the respective subset of the lower series of samples for each of the multiple higher series of samples based upon the reference sub-series of the lower series of samples; processing each of said selected subsets of the lower series of samples and the respective higher series of samples to select multiple sub-series of the lower series of samples; and parametrically encoding the multiple higher series of samples by identifying the multiple selected sub-series of the lower series of samples.