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Title
Audio Encoder an Decoder for Encoding Frames of Sampled Audio Signals
Date Issued
2010
Author(s)
Lecomte, J.
Gournay, P.
Bayer, S.
Multrus, M.
Rettelbach, N.
Patent No
20080079851
20080103825
Abstract
An audio encoder (100) adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame comprises a number of time domain audio samples, comprising a predictive coding analysis stage (110) for determining information on coefficients of a synthesis filter and information on a prediction domain frame based on a frame of audio samples. The audio encoder (100) further comprises a frequency domain transformer (120) for transforming a frame of audio samples to the frequency domain to obtain a frame spectrum and an encoding domain decider (130). Moreover, the audio encoder (100) comprises a controller (140) for determining an information on a switching coefficient when the encoding domain decider decides that encoded data of a current frame is based on the information on the coefficients and the information on the prediction domain frame when encoded data of a previous frame was encoded based on a previous frame spectrum.
Language
en
Patenprio
US 20080079851 P: 20080711