TH126683B - Audio encoder Audio decoder And related methods for signal processing. Multi-channel sound using complex number prediction - Google Patents

Abstract

Audio encoders and audio decoders are based on a combination of two audio channels (201,202) to provide a weak first combination signal (204) and a residual signal (205). It is made possible by using predictive side signals that have been triggered by weak signals. First combination signal and residual signal from The predictions are encoded (209) and recorded (212) in the stream (213) together with the prediction information (206) that have been generated by the optimized (207) available. Based on the optimization target (208), the decoder uses the prediction residual signals Signal combination one And predictive information to generate signals in the first channel that Get decoded And the signal in the second channel has been decoded In the example of an encoder or in the example of a decoder Real-to-imaginary transformations can be applied. For estimating the imaginary part of the spectrum of the first combination signal for calculating the prediction signal that has been used to achieve the residual signal from predicting the first combination signal with the true value is multiplied by the fraction. The truth of the complex number prediction information And the approximate complex number part of the first combination signal is multiplied by the fraction Imaginary information, predicting complex numbers

Claims (1)

1. An audio decoder for decoding of encoded multi-channel audio (100), where encoded multi-channel audio is included. The first encrypted combination signal that is generated based on the rule of thumb. Combined to combine the audio signal on the first channel. And the audio signal on the second channel of Multi-channel audio Residual signals from the encrypted predictions and Prediction Information That includes Decoder (110) for decoding a contract