Processing of excitation in audio coding and decoding

In an apparatus and method, time-varying signals are processed and encoded via a frequency domain linear prediction (FDLP) scheme to arrive at an all-pole model. Residual signals resulted from the scheme are estimated and transformed into a time domain signal. Through the process of heterodyning, th...

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Bibliographic Details
Main Authors HERMANSKY HYNEK, SRINIVASAMURTHY NAVEEN B, MOTLICEK PETR, GARUDADRI HARINATH
Format Patent
LanguageEnglish
Published 05.03.2013
Subjects
BASIC ELECTRONIC CIRCUITRY
DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PULSE TECHNIQUE
TRANSMISSION
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Summary:In an apparatus and method, time-varying signals are processed and encoded via a frequency domain linear prediction (FDLP) scheme to arrive at an all-pole model. Residual signals resulted from the scheme are estimated and transformed into a time domain signal. Through the process of heterodyning, the time domain signal is frequency shifted toward the baseband level as a downshifted carrier signal. Quantized values of the all-pole model and the frequency transform of the downshifted carrier signal are packetized as encoded signals suitable for transmission or storage. To reconstruct the time-varying signals, the encoded signals are decoded. The decoding process is basically the reverse of the encoding process.
Bibliography:Application Number: US20070696974