Spatial information algorithm and surround sound effect indication

• Autorzy: Kornatowski E.
• Konferencja: Scientific Conference on Computer Applications in Electrical Engineering [13; April 14-16, 2008; Poznan]
• Języki publikacji: EN

Abstrakty

EN

The method of the extraction of spatial information from 2-channel audio signal is presented in the paper. The proposed algorithm will be used to recover true spatial acoustical field for 5.0 surround system from archival 2-channel stereo recordings. There is a lot of such recordings (digital as well) which can be more attractive, when post processed to 5.0-channel standard and reproduced in home theater systems. The idea of the proposed approach is based on special utilization of amplitude-phase dependencies in input audio signal. The author have created a nonlinear algorithm of spatial information which intelligently splits 2-channel sound to 5 output channels in DTS (or Dolby Digital) 5.0 format. The proposed algorithm is also compatible with analog Dolby Surround coding. The efficiency of the method is proven objectively and subjectively. Author has also presented simple method of graphic presentation of received results. Thanks to combination of diagrams it is possible to estimate fast a quality of spatial effect. Effectively of presented sound spatialization method has been compared to known matrix Dolby Surround system and recordings made in multi-channel Dolby Digital 5.0 system.

Słowa kluczowe

EN

spatial information; filtration algorithm; surround sound effect

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Poznan University of Technology Academic Journals. Electrical Engineering
• Rocznik: 2008
• Tom: No 58
• Strony: 7--15
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Kornatowski E.

• Szczecin University of Technology

Bibliografia

• [1] Aarts R.M., Irwan R.: Two - to - Five Channel Sound Processing, Journal of the Audio Engineering Society, vol. 50, No. 11, 2002, p. 914-926.
• [2] Dresler R.: Pro Logic Surround Decoder, Principles of Operation, Dolby Laboratories, http://www.dolby.com (1997).
• [3] Rumsey F.: Microphone and mixing techniques for multichannel surround sound, Journal of the Audio Engineering Society, vol. 46, No. 4, 1998, p. 354-358.
• [4] Wojnar A.: Teoria sygnałów, Wydawnictwo Naukowo - Techniczne, Warszawa 1980.
• [5] Kleczkowski P.: Selective Mixing of Sounds, 119th Convention of the Audio Engineering Society, New York, October 2005, preprint 6552.