METHOD FOR DETECTING THE QUANTIZATION OF SPECTRA

摘要

The invention comprises the retrieval of a quantized spec-trum of audio-data, which had been compressed conforming to psychoacoustic principles. This spectrum can be identified with the aid of sorted (and logarithmized) differences of the magnitude of the amplitude.A problem to be solved by the invention is to find the basis of sensitive indicators for the degree of quantization of a spectrum. The result of this calculation shows for a quan-tized spectrum several small values at amplitudes of the same quantization level, and obvious spikes at positions, where the amplitudes have reached a higher level of quanti-zation, while a non-quantized spectrum typically resembles noise.