Methods and devices for low-frequency emphasis during audio...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

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C704S200100, C704S500000, C704S230000, C704S229000, C375S243000, C375S240130, C375S240160

Reexamination Certificate

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07933769

ABSTRACT:
In a method and device for low-frequency emphasis, where the spectrum of a sound signal is transformed in a frequency domain and comprises transform coefficients grouped in a number of blocks, a maximum energy for one block having a position index is calculated. Also, a factor having a position index smaller than the position index of the block with maximum energy is calculated for each block. For each block, an energy of the block is calculated, the factor is computed from the calculated maximum energy and the computed energy of the block, and a gain is determined from the factor and applied to the transform coefficients of the block.

REFERENCES:
patent: 6011824 (2000-01-01), Oikawa et al.
patent: 6029128 (2000-02-01), Jarvinen et al.
patent: 6092041 (2000-07-01), Pan et al.
patent: 6266632 (2001-07-01), Kato et al.
patent: 6691082 (2004-02-01), Aguilar et al.
patent: 7272556 (2007-09-01), Aguilar et al.
patent: 7693710 (2010-04-01), Jelinek et al.
patent: 2002/0163455 (2002-11-01), Reefman et al.
patent: 2005/0154584 (2005-07-01), Jelinek et al.
patent: 2005/0261900 (2005-11-01), Ojala et al.
patent: 2005/0267742 (2005-12-01), Makinen
patent: 2388358 (2003-11-01), None
patent: 61-242117 (1986-10-01), None
patent: 2000-117573 (2001-04-01), None
patent: 2002-189499 (2002-07-01), None
patent: 2003-177797 (2003-06-01), None
patent: 2 181 481 (1999-11-01), None
patent: 03/102923 (2003-12-01), None
Adoul et al., “Speech Coding and Synthesis,” Elsvier, 1995, edited by Kleijn, pp. 291-308.
Gersho et al., “Vector Quantization and Signal Compression,” Kluwer Academic Publishers, 1992, pp. 309-338.
Jayant et al., “Digital Coding of Waveforms—Principles and Applications to Speech and Video,” Prentice-Hall, 1984, pp. 510-590.
Schroeder et al., Code-Excited Linear Prediction (CELP): High Quality Speech at Very Low Bit Rates, IEEE, 1985, pp. 937-940.
Bessette et al., “The adaptive multirate wideband speech codec (AMR-WB)”, IEEE Transactions on Speech and Audio Processing, vol. 10, No. 8, Nov. 2002, pp. 620-636.
Bessette et al., “A wideband speech and audio codec at 16/24/32 kbit/s using hybrid ACELP/TCX techniques”, Proceedings IEEE Workshop on Speech Coding Proceedings, Jun. 20-23, 1999, pp. 7-9.
Chen, “A candidate coder for the ITU-T's new wideband speech coding standard”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 2, Apr. 21-24, 1997, pp. 1359-1362.
Chen et al., “Transform predictive coding of wideband speech signals”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 1, May 7-10, 1996, pp. 275-278.
Combescure et al., “A 16, 24, 32 kbit/s wideband speech codec based on ATCELP”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 1, Mar. 15-19, 1999, pp. 5-8.
Gibson et al., “Lattice Quantization”, Adv. Electron. Phys., vol. 72, 1988, pp. 259-331.
Jbira et al., “Low delay coding of wideband audio (20 Hz-15 kHz) at 64 kbps”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 6, May 12-15, 1998, pp. 3645-3648.
Lefebvre et al., “High quality coding of wideband audio signals using transform coded excitation (TCX)”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 1, Apr. 19-22, 1994, pp. I/193-I/196.
Moreau et al., “Successive orthogonalizations in the multistage CELP coder”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 1992, pp. 61-64.
Ramprashad, “The multimode transform predictive coding paradigm”, IEEE Transactions on Speech and Audio Processing, vol. 11, No. 2, Mar. 2003, pp. 117-129.
Schnitzler et al. “Wideband speech coding using forward/backward adaptive prediction with mixed time/frequency domain excitation”, Proceedings IEEE Workshop on Speech Coding Proceedings, Jun. 20-23, 1999, pp. 4-6.
Xie et al., “Embedded algebraic vector quantizers (EAVQ) with application to wideband speech coding”, Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 1, May 7-10, 1996, pp. 240-243.
3GPP TS 26.173, ANSI-C code for the Adaptive Multi Rate—Wideband (AMR-WB) speech codec, 2004, pp. 1-19.
3GPP TS 26.190, Adaptive Multi-Rate—Wideband (AMR-WB) speech codec; Transcoding Functions, 2005, pp. 1-53.
3GPP TS 26.290 Audio codec processing functions; Extended AMR Wideband codec; Transcoding functions, 2004, pp. 1-72.
International Standard, “Information Technology-Coding of Audio-Visual Objects-Part 3: Audio”, ISO/IEC 14496-3, 1985, 200, pp. 1-1178.
ITU-T Telecommunication Standardization Sector of ITU, “Series G: Transmission Systems and Media, Digital Systems and Networks, Digital Terminal Equipments-Coding of Analogue Signals by Methods other that PCM”, May 2005, pp. 1-36.

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