Processing microphone generated signals to generate surround...

Details Processing microphone generated signals to generate surround... Processing microphone generated signals to generate surround...

2007-01-12

2011-10-18

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Stereo sound pickup device

C381S092000

Reexamination Certificate

active

08041043

ABSTRACT:
Surround sound recording is a tedious task requiring the use of many microphones. The invention aims at enabling the use of two-channel microphones (or stereo microphones) for multi-channel surround recording. A conventional stereo microphone, or a two-channel microphone specifically optimized for use with the proposed algorithm, is used to generate two signals. A post-processor is applied to the microphone generated signals to convert them to multi-channel surround.This aim is achieved through a method to generate multiple output audio channels (y1, . . . , yM) from two microphone generated audio channels (x1, x2), in which the number of output channels is equal or higher than two, this method comprising the steps of:determine directions of sound components related to the microphone characteristicsdetermine compensation gains of sound components related to the microphone characteristicsgenerating the output audio channels, y1, . . . , yM, by using the microphone generated audio channels, x1, x2, directions, and compensation gains.

REFERENCES:
patent: 7274794 (2007-09-01), Rasmussen
patent: 2003/0139851 (2003-07-01), Nakadai et al.
Hull, “Surround Sound Past, Present, and Future” Tech. Rep., Dolby Laboratories, 1999, www.dolby.com/tech.
Eargle, “Multichannel Stereo Matrix Systems: An Overview” IEEE Trans. on SPEECJ and Audio Proc., vol. 19, No. 7, pp. 552-559, Jul. 1971.
Dressler, “Dolby Surround Prologic II Decoder—Principles of Operation” Tech. Rep., Dolby Laboratories, 2000, www.dolby.com/tech/.
Gundry, “A New Active Matrix Decoder for Surround Sound” Proc. AES 19thInt. Conf., Jun. 2001.

Affiliated with

Also associated with

Rating

Processing microphone generated signals to generate surround... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processing microphone generated signals to generate surround..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing microphone generated signals to generate surround... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4291501