| 摘要 |
An audio encoder adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame has a number of time domain audio samples, having a predictive coding analysis stage 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 further has a frequency domain transformer for transforming a frame of audio samples to the frequency domain to obtain a frame spectrum and an encoding domain decider for deciding whether encoded data for a frame is based on the information on the coefficients and on the information on the prediction domain frame, or based on the frame spectrum. Moreover, the audio encoder has a controller 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 and a redundancy reducing encoder for encoding the information on the prediction domain frame, the information on the coefficients, the information on the switching coefficient and/or the frame spectrum. |
