EP 2720477 A1 20140416 - Virtual bass synthesis using harmonic transposition
Title (en)
Virtual bass synthesis using harmonic transposition
Title (de)
Virtuelle Basssynthese mit harmonischer Transposition
Title (fr)
Synthèse virtuelle de graves à l'aide de transposition harmonique
Publication
Application
Priority
US 201213652023 A 20121015
Abstract (en)
In some embodiments, a virtual bass generation method including steps of: performing harmonic transposition on low frequency components of an input audio signal (typically, bass frequency components expected to be inaudible during playback of the input audio signal using an expected speaker or speaker set) to generate transposed data indicative of harmonics (which are expected to be audible during playback, using the expected speaker(s), of an enhanced version of the input audio which includes the harmonics); generating an enhancement signal in response to the transposed data; and generating an enhanced audio signal by combining (e.g., mixing) the enhancement signal with the input audio signal. Other aspects are systems (e.g., programmed processors) and devices (e.g., devices having physically-limited bass reproduction capabilities, such as, for example, a notebook, tablet, mobile phone, or other device with small speakers) configured to perform any embodiment of the method.
IPC 8 full level
H04R 3/04 (2006.01); G10L 21/02 (2013.01); G10L 21/038 (2013.01)
CPC (source: EP)
G10L 21/038 (2013.01); H04R 3/04 (2013.01); H04R 2430/03 (2013.01)
Citation (applicant)
US 7242710 B2 20070710 - EKSTRAND PER [SE]
Citation (search report)
- [XI] US 2007253576 A1 20071101 - BAI MINGSIAN R [TW], et al
- [XI] US 2010232624 A1 20100916 - ZHANG CHEN [CN]
- [XA] US 2012008788 A1 20120112 - JONSSON RAGNAR H [US], et al
- [A] SUPRIYA DHABAL ET AL: "An efficient Quadrature Mirror Filter design and its applications in audio signal processing", COMMUNICATION AND INDUSTRIAL APPLICATION (ICCIA), 2011 INTERNATIONAL CONFERENCE ON, IEEE, 26 December 2011 (2011-12-26), pages 1 - 4, XP032113289, ISBN: 978-1-4577-1915-8, DOI: 10.1109/ICCINDA.2011.6146688
- [A] FLORENCIO D A F ED - INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "On the use of asymmetric windows for reducing the time delay in real-time spectral analysis", SPEECH PROCESSING 1. TORONTO, MAY 14 - 17, 1991; [INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH & SIGNAL PROCESSING. ICASSP], NEW YORK, IEEE, US, vol. CONF. 16, 14 April 1991 (1991-04-14), pages 3261 - 3264, XP010043720, ISBN: 978-0-7803-0003-3, DOI: 10.1109/ICASSP.1991.150149
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2720477 A1 20140416; EP 2720477 B1 20160302; CN 104704855 A 20150610; CN 104704855 B 20160824; EP 2907324 A1 20150819; EP 2907324 B1 20161109; JP 2015531575 A 20151102; JP 5894347 B2 20160330; WO 2014060204 A1 20140424
DOCDB simple family (application)
EP 13188415 A 20131014; CN 201380053450 A 20130927; EP 13771123 A 20130927; EP 2013070262 W 20130927; JP 2015536058 A 20130927