DK3079152T3 - Audio-afkodning med selektiv efterfiltrering - Google Patents
Audio-afkodning med selektiv efterfiltrering Download PDFInfo
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- DK3079152T3 DK3079152T3 DK16166356.2T DK16166356T DK3079152T3 DK 3079152 T3 DK3079152 T3 DK 3079152T3 DK 16166356 T DK16166356 T DK 16166356T DK 3079152 T3 DK3079152 T3 DK 3079152T3
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- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
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- Spectroscopy & Molecular Physics (AREA)
- Quality & Reliability (AREA)
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- Pure & Applied Mathematics (AREA)
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- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Fats And Perfumes (AREA)
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- Filters For Electric Vacuum Cleaners (AREA)
Claims (6)
1. Fremgangsmåde til afkodning af et bitstrømsignal som et audio-tidssignal, hvilken fremgangsmåde omfatter de følgende trin: afkodning af et bitstrømsignal som et foreløbigt audio-tidssignal ifølge en kodningsmetode, der er valgt fra en flerhed af kodningsmetoder, hvorved flerheden af kodningsmetoder omfatter i det mindste en første kodningsmetode, der omfatter et efterfiltreringstrin, og i det mindst en anden kodningsmetode, der ikke omfatter postfiltreringstrinnet, hvorved efterfiltreringstrinnet anvender et toneforstærkningsfilter til det foreløbige audio-tidssignal, hvorved der opnås et audio-tidssignal, hvorved efterfiltreringstrinnet selektivt udelades som reaktion på efterfiltreringsinformation, der er indkodet i bitstrømssignalet, idet efterfiltreringsinformationen tyder på en indkoder-side beslutning om, hvorvidt efterfiltreringstrinnet udelades eller ikke, hvorved efterfiltreringstrinnet selektivt udelades i den første kodningsmetode, og hvorved efterfiltreringstrinnet desuden omfatter dæmpning af støj, der befinder sig i spektrale bunde.
2. Fremgangsmåde ifølge krav 1, hvorved toneforstærkningsfiltret er et lavfrekvent efterfilter.
3. Fremgangsmåde ifølge krav 1, hvorved afkodningstrinnet omfatter anvendelse af afkodning medlavforsinket kodemagnetiseret lineær korrigering (code-excited linear prediction, CELP).
4. Fremgangsmåde ifølge krav 1, hvorved bitstrømssignalet er segmenteret i tidsrammer, og efterfiltreringstrinnet udelades for en hel tidsramme eller en sekvens af hele tidsrammer.
5. Computerprogramprodukt, der omfatter en databærer med lagrede instruktioner, som, når de køres af en digital signalprocessor, får den digitale signalprocessor til at udføre en fremgangsmåde ifølge krav 1, 2, 3 eller 4.
6. Afkodningssystem, der er konfigureret til at udføre en fremgangsmåde ifølge krav 1, 2, 3 eller 4.
Applications Claiming Priority (2)
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US36123710P | 2010-07-02 | 2010-07-02 | |
EP14164773.5A EP2757560B1 (en) | 2010-07-02 | 2011-06-23 | Audio decoding with selective post-filter |
Publications (1)
Publication Number | Publication Date |
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DK3079152T3 true DK3079152T3 (da) | 2018-08-13 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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DK16166357.0T DK3079153T3 (da) | 2010-07-02 | 2011-06-23 | Audio-afkodning med selektiv efterfiltrering |
DK16166356.2T DK3079152T3 (da) | 2010-07-02 | 2011-06-23 | Audio-afkodning med selektiv efterfiltrering |
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DK16166357.0T DK3079153T3 (da) | 2010-07-02 | 2011-06-23 | Audio-afkodning med selektiv efterfiltrering |
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US (14) | US9224403B2 (da) |
EP (8) | EP3422346B1 (da) |
JP (13) | JP6178236B2 (da) |
KR (12) | KR101696632B1 (da) |
CN (7) | CN103098129B (da) |
AU (1) | AU2011273680B2 (da) |
CA (14) | CA3093517C (da) |
DK (2) | DK3079153T3 (da) |
ES (6) | ES2683647T3 (da) |
HK (8) | HK1183965A1 (da) |
HU (2) | HUE038985T2 (da) |
IL (10) | IL302557B1 (da) |
MX (1) | MX2012014525A (da) |
MY (4) | MY176192A (da) |
PL (2) | PL3079153T3 (da) |
RU (6) | RU2562422C2 (da) |
SG (7) | SG10202005270YA (da) |
WO (1) | WO2012000882A1 (da) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL302557B1 (en) | 2010-07-02 | 2024-04-01 | Dolby Int Ab | After–selective bass filter |
AU2014211525B2 (en) * | 2013-01-29 | 2016-09-01 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Apparatus and method for processing an encoded signal and encoder and method for generating an encoded signal |
EP2981959B1 (en) * | 2013-04-05 | 2018-07-25 | Dolby International AB | Audio encoder and decoder for interleaved waveform coding |
EP3011764B1 (en) | 2013-06-18 | 2018-11-21 | Dolby Laboratories Licensing Corporation | Bass management for audio rendering |
US9418671B2 (en) * | 2013-08-15 | 2016-08-16 | Huawei Technologies Co., Ltd. | Adaptive high-pass post-filter |
EP3503095A1 (en) * | 2013-08-28 | 2019-06-26 | Dolby Laboratories Licensing Corp. | Hybrid waveform-coded and parametric-coded speech enhancement |
US9666202B2 (en) | 2013-09-10 | 2017-05-30 | Huawei Technologies Co., Ltd. | Adaptive bandwidth extension and apparatus for the same |
US9685166B2 (en) * | 2014-07-26 | 2017-06-20 | Huawei Technologies Co., Ltd. | Classification between time-domain coding and frequency domain coding |
EP2980799A1 (en) * | 2014-07-28 | 2016-02-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for processing an audio signal using a harmonic post-filter |
EP2980798A1 (en) * | 2014-07-28 | 2016-02-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Harmonicity-dependent controlling of a harmonic filter tool |
CN105957534B (zh) * | 2016-06-28 | 2019-05-03 | 百度在线网络技术(北京)有限公司 | 自适应滤波方法和自适应滤波器 |
TWI752166B (zh) | 2017-03-23 | 2022-01-11 | 瑞典商都比國際公司 | 用於音訊信號之高頻重建的諧波轉置器的回溯相容整合 |
EP3483879A1 (en) | 2017-11-10 | 2019-05-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Analysis/synthesis windowing function for modulated lapped transformation |
WO2019091576A1 (en) | 2017-11-10 | 2019-05-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Audio encoders, audio decoders, methods and computer programs adapting an encoding and decoding of least significant bits |
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