Audio decoding device, decoding method, and program
Patent 7555434 Issued on June 30, 2009. Estimated Expiration Date: 
June 24, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 24, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesApparatus for expanding narrowband speech to wideband speech by codebook correspondence of linear mapping functions High frequency enhancement layer coding in wideband speech codec Audio coding systems and methods Patent #: 6675144 Inventors
AssigneeApplicationNo. 10485616 filed on 06/24/2003US Classes:704/500AUDIO SIGNAL BANDWIDTH COMPRESSION OR EXPANSIONExaminersPrimary: Vo, Huyen X.Attorney, Agent or FirmForeign Patent References
International ClassG10L 19/00AbstractAn energy corrector (105) for correcting a target energy for high-frequency components and a corrective coefficient calculator (106) for calculating an energy corrective coefficient from low-frequency subband signals are newly provided. These processors perform a process for correcting a target energy that is required when a band expanding process is performed on a real number only. Thus, a real subband combining filter and a real band expander which require a smaller amount of calculations can be used instead of a complex subband combining filter and a complex band expander, while maintaining a high sound-quality level, and the required amount of calculations and the apparatus scale can be reduced.Other References
Field of SearchAUDIO SIGNAL TIME COMPRESSION OR EXPANSION (E.G., RUN LENGTH CODING)Delay line With content reduction encoding With content reduction encoding AUDIO SIGNAL BANDWIDTH COMPRESSION OR EXPANSION Linear prediction Frequency Excitation SPEECH SIGNAL PROCESSING Correlation function Normalizing Analysis by synthesis Unit conversion 708/228 | |
