Arrangement for determining a signal spectrum of a wideband digi

Details Arrangement for determining a signal spectrum of a wideband digi Arrangement for determining a signal spectrum of a wideband digi

1995-05-17

1998-07-21

Olms, Douglas W.

395 239, G10L 918, G10L 700

Patent

active

057845336

ABSTRACT:
An arrangement for determining a signal spectrum of a wideband digital audio signal in an adaptive bitallocation system, including a signal splitting unit for splitting the wideband digital audio signal into M narrow band sub signals (SB.sub.m), each one of the M sub signals being representative of a component of the wideband digital audio signal which is present in a corresponding one of M adjacent substantially non-overlapping narrow bands in the frequency band of the wideband digital audio signal; and a, calculating unit for each time determining from the M sub signal, information which is representative of the signal spectrum of the wideband digital audio signal, wherein M is an integer larger than one. The calculating unit includes a transformation unit for carrying out on each of the sub signals a time-to-frequency transform based signal processing so as to obtain the information representative of the signal spectrum of the wideband digital audio signal. The time-to-frequency transform based processing can be a Fourier transform.

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K. Brandenburg et al., The ISO/MPEG-audio codec: a generic standard for coding of high-quality digital audio preprint No. 3336 of the 92nd AES Convention in Vienna, Mar. 1992.

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