Generating coefficients for a prediction filter in an encoder

A method of transmitting a digital information signal via a transmission medium, comprising the steps of

• receiving the digital information signal,
• deriving a prediction signal from the digital information signal in dependence on an array of prediction filter coefficients,
• combining the digital information signal and said prediction signal so as to obtain a residual signal,
• encoding said residual signal so as to obtain an encoded signal,
• generating an array of filter coefficients A[i] in response to the digital information signal, i being an integer for which it holds that 0<i<p, where p is a variable,
• supplying the encoded signal to an output terminal for transmission via a transmission medium, characterized in that the method further comprises the step of
• smoothing the array of filter coefficients A[i] so as to obtain the array of prediction filter coefficients.

A receiver for receiving a transmission signal and generating a digital information signal therefrom, the receiver comprising:

• receiving means for receiving the transmission signal and retrieving an encoded signal therefrom,
• decoding means for decoding the encoded signal so as to obtain a residual signal,
• adaptive prediction filter means adapted to derive a prediction signal from the digital information signal in dependence on an array of prediction filter coefficients,
• signal combination means for combining the residual signal and the prediction signal so as to obtain the digital information signal,
• coefficient generator means for generating an array of filter coefficients A[i] in response to the digital information signal, i being an integer for which it holds that 0<i<p, where p is a variable, characterized in that the receiving device further comprises
• smoothing means for smoothing the array of filter coefficients A[i] so as to obtain the array of prediction filter coefficients for supply to the adaptive prediction filter means.