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Title
Audio Encoder and Decoder for Encoding and Decoding Frames of a Sampled Audio Signal
Date Issued
2010
Author(s)
Geiger, R.
Grill, B.
Bessette, B.
Gournay, P.
Fuchs, G.
Multrus, M.
Neuendorf, M.
Schuller, G.
Patent No
20080079862
Abstract
An audio encoder (10) adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame comprises a number of time domain audio samples. The audio encoder (10) comprises a predictive coding analysis stage (12) for determining information on coefficients of a synthesis filter and a prediction domain frame based on a frame of audio samples. The audio encoder (10) further comprises a time-aliasing introducing transformer (14) for transforming overlapping prediction domain frames to the frequency domain to obtain prediction domain frame spectra, wherein the time-aliasing introducing transformer (14) is adapted for transforming the overlapping prediction domain frames in a critically-sampled way. Moreover, the audio encoder (10) comprises a redundancy reducing encoder (16) for encoding the prediction domain frame spectra to obtain the encoded frames based on the coefficients and the encoded prediction domain frame spectra.
Language
en
Patenprio
US 20080079862 P: 20080711