Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1995-12-18
1998-10-20
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704226, G10L 302, G10L 900
Patent
active
058262270
ABSTRACT:
A digital audio broadcasting system incorporates a perceptual audio coder that encodes a digital audio signal for broadcast. A "source label" is provided by controlling the perceptual audio coder in such a way that the number of coefficient samples, n, used in each transmission frame represents information about the source. For example, if the value of n is odd, then a binary "1" is transmitted, but if the value of n is even, then a binary "0" is transmitted. As a result, a low-bit rate "source label" is transmitted over a number of frames. In a receiver, the source of the digital audio signal is identified by simply monitoring the value of n over the number of frames. More importantly, the value of n in each frame is required by a corresponding perceptual audio decoder, in the receiver, to correctly recover the digital audio signal. As a result, the "source label" is inseparable from the encoded digital audio signal since any tampering of the value of n after transmission distorts not only the "source label" but affects the recovery of the digital audio signal as well.
REFERENCES:
patent: 4516241 (1985-05-01), Farah et al.
patent: 5282197 (1994-01-01), Kreitzer
patent: 5285498 (1994-02-01), Johnston
patent: 5319735 (1994-06-01), Preuss et al.
patent: 5341457 (1994-08-01), Hall, II et al.
patent: 5367608 (1994-11-01), Veldhuis et al.
patent: 5463641 (1995-10-01), Dorward et al.
patent: 5491773 (1996-02-01), Veldhuis et al.
Edouard Patrick N.
Hudspeth David R.
Lucent Technologies - Inc.
Opalach Joseph J.
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