Speech Or Audio Signal Analysis-synthesis Techniques For Redundancy Reduction, E.g., In Vocoders, Etc.; Coding Or Decoding Of Speech Or Audio Signals; Compression Or Expansion Of Speech Or Audio Signals, E.g., Source-filter Models, Psychoacoustic Analysis, Etc. (epo) Patents (Class 704/E19.001)
- Blocking, i.e., grouping of samples in time, choice of analysis window, overlap factor (EPO) (Class 704/E19.011)
- Noise substitution, i.e., substituting nontonal spectral components by noisy source (EPO) (Class 704/E19.013)
- Spectral prediction for pre-echo prevention; temporal noise shaping (TNS), e.g., in MPEG2 or MPEG4, etc. (EPO) (Class 704/E19.014)
- Quantization or dequantization of spectral components (EPO) (Class 704/E19.015)
- Using subband decomposition (EPO) (Class 704/E19.018)
- Using orthogonal transformation (EPO) (Class 704/E19.02)
- Determination or coding of the spectral characteristics, e.g., of the short-term prediction coefficients, etc. (EPO) (Class 704/E19.024)
- Determination or coding of the excitation function; determination or coding of the long-term prediction characteristics (EPO) (Class 704/E19.026)
- Details of speech and audio coders (EPO) (Class 704/E19.039)