Concept for encoding of information

• Main Authors: HUTTENBERGER, MATTHIAS, BACKSTROM, TOM, FISCHER, JOHANNES, PINO, ALFONSO, FISCHER PEDERSEN, CHRISTIAN
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2015
• 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 (IS), the information encoder (1) comprising: an analyzer (2) for analyzing the information signal (IS) in order to obtain linear prediction coefficients of a predictive polynomial A(z); a converter (3) 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 (3) 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-l A(z-1) and Q(z)=A(z)-z-m-l A(z-1), wherein m is an order of the predictive polynomial A(z) and l is greater or equal to zero, wherein the converter (3) is configured to obtain the frequency values (f1...fn) by establishing a strictly real spectrum (RES) derived from P(z) and a strictly imaginary spectrum (IES) from Q(z) and by identifying zeros of the strictly real spectrum (RES) derived