Quality of decoded audio by adding noise

Details Quality of decoded audio by adding noise Quality of decoded audio by adding noise

2004-06-25

2009-06-16

Abebe, Daniel D (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S220000, C704S226000, C704S500000

Reexamination Certificate

active

07548852

ABSTRACT:
The present invention relates to a method of encoding and decoding an audio signal. The invention further relates to an arrangement for encoding and decoding an audio signal. The invention further relates to a computer-readable medium comprising a data record indicative of an audio signal and a device for communicating an audio signal having been encoded according to the present invention. By the method of encoding, a double description of the signal is obtained, where the encoding comprises two encoding steps, a first standard encoding and an additional second encoding. The second encoding is able to give a coarse description of the signal, such that a stochastic realization can be made and appropriate parts can be added to the decoded signal from the first decoding. The required description of the second encoder in order to make the realization of a stochastic signal possible requires a relatively low bit rate, while other double/multiple descriptions require a much higher bit rate.

REFERENCES:
patent: 7197454 (2007-03-01), Van Der Kerkhof et al.
patent: 7313519 (2007-12-01), Crockett
patent: 7321559 (2008-01-01), Etter et al.
patent: 2002/0154774 (2002-10-01), Oomen et al.
patent: 2002/0156619 (2002-10-01), Van De Kerkhof et al.

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