Concept for encoding of information

• Main Authors: BACKSTROM TOM, PINO ALFONSO, HUTTENBERGER MATTHIAS, FISCHER PEDERSEN CHRISTIAN, FISCHER JOHANNES
• Format: Patent
• Language: Chinese; English
• Published: 19.05.2020
• Subjects: ACOUSTICS; MUSICAL INSTRUMENTS; PHYSICS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

The invention provides an information encoder for encoding an information signal, the information encoder comprising: an analyzer for analyzing the information signal in order to obtain linear prediction coefficients of a predictive polynomial A(z); a converter for converting the linear prediction coefficients of the predictive polynomial A(z) to frequency values f1...fn of a spectral frequency representation of the predictive polynomial A(z), wherein the converter is configured to determine the frequency values f1...fn by analyzing a pair of polynomials P(z) and Q(z) being defined as P(z) = A(z) + z-m-lA(z-1) and Q(z) = A(z)=z-m-lA(z-1), wherein m is an order of the predictive polynomial A(z) and I is greater or equal to zero, wherein the converter is configured to obtain the frequency values f1...fn by establishing a strictly real spectrum derived from P(z) and a strictly imaginary spectrum from Q(z) and by identifying zeros of the strictly real spectrum derived from P(z) and the strictly imaginary spectrum