Multi-channel encoder

Details Multi-channel encoder Multi-channel encoder

2005-03-25

2010-10-12

Jackson, Jakieda R (Department: 2626)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Quadrasonic

C704S200000, C704S200100, C381S022000, C381S017000, C381S018000, C381S019000, C381S001000

Reexamination Certificate

active

07813513

ABSTRACT:
There is described a method of encoding input signals (CHI to CH3; 400to450) in a multi-channel encoder (5; 15) to generate corresponding output data comprising down-mix output signals (610, 620) together with complementary parametric data (600). The method includes a first step of down-mixing input signals (CHI to CH3; 400to450) to generate the corresponding down-mix output signals (610, 620), and a second step of processing the input signals (CHI to CH3; 400to450) during down-mixing to generate said parametric data (600) complementary to the down-mix output signals (610, 620). Processing of the input signals (CHI to CH3; 400to450) involves including information in the down-mix signals (610, 620) which is useable during subsequent decoding of the down-mix output signals (610, 620) and the parametric data (600) to determine at least some parameter data and thereby enabling representations of the input signals (CHI to CH3; 400to450) to be subsequently regenerated. Coders for use in the encoder (5; 15) for performing essential signal processing operations therein are also elucidated.

REFERENCES:
patent: 7193538 (2007-03-01), Craven et al.
patent: 7447317 (2008-11-01), Herre et al.
patent: 2004/0049379 (2004-03-01), Thumpudi et al.
patent: 1107232 (2001-06-01), None
patent: WO2004008805 (2004-01-01), None
Chonavel et al: “Multi-Channel Linear Predictive Coding of Audio Signals”; 4th European Conference on Speech Communication and Technology, Eurospeech '95, Madrid, Spain, Sep. 18-21, 1995, vol. 1. Conf. 4, XP000854655.

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