EP 0805613 A1 19971105 - Digital system for the equalisation of frequency and time response of audio systems and devices and of listening spaces
Title (en)
Digital system for the equalisation of frequency and time response of audio systems and devices and of listening spaces
Title (de)
Digitalsystem zur Entzerrung von Frequenz-Zeitgang in Audiosystemen und -vorrichten sowie in Abhörräumen
Title (fr)
Système numérique pour l'égalisation de le réponse en fréquence et temps des systèmes et dispositifs audio et d'espaces d'écoute
Publication
Application
Priority
GR 95100467 A 19951221
Abstract (en)
The invention consists in a digital electronic system and a method removing the distortions of the audio signal of audio reproduction systems, by completely equalising not only the distortions generated by these very systems, but also the distortions generated by listening spaces, as described in Figure 3. This is a stand-alone lowest system, connected, as shown in Figure 2, between digital audio sources (eg. CD player) and analog amplifier, which realises, by a Least Squares method, finite impulse response digital filters, with more than 800 coefficients per channel of stereo digital audio signal at the sampling frequency of 44,100 Hz, capable of realising up to 2,200 coefficients per channel by the method described in Figures 4 and 5, and which is easily programmable by the user through a system of PCMCIA card reading, screen and operation control microprocessor or/and through a communication gate with a PC, as shown in Figures 7, 10 and 11. <IMAGE>
IPC 1-7
IPC 8 full level
H04S 1/00 (2006.01)
CPC (source: EP)
H04S 1/007 (2013.01)
Citation (search report)
- [A] US 4947362 A 19900807 - BUI TUAN H [US]
- [A] GB 2199216 A 19880629 - BRITISH TELECOMM
- [A] WO 9513688 A1 19950518 - SPARKOMATIC CORP [US]
- [A] STANOJEVIC ET AL.: "THE TOTAL SURROUND SOUND (TSS) PROCESSOR.", SMPTE JOURNAL, vol. 103, no. 11, November 1994 (1994-11-01), WHITE PLAINS N.Y. US, pages 734 - 740, XP000475179
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 96600010 A 19961223; GR 950100467 A 19951221