Audio signal processors

Details Audio signal processors Audio signal processors

2006-02-21

2006-02-21

Mei, Xu (Department: 2644)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Digital audio data processing system

C381S098000, C330S251000, C330S20700P

Reexamination Certificate

active

07003358

ABSTRACT:
An audio signal processor which modifies audio signal components outside the conventional audio frequency band. The processor includes a Delta Sigma Modulator (DSM) that receives a non-interpolated digital audio signal sampled at a frequency of at least 198 kHz.

REFERENCES:
patent: 5754666 (1998-05-01), Nakagawa
patent: 5946402 (1999-08-01), Nishio et al.
patent: 2 181 626 (1987-04-01), None
patent: WO 98 07234 (1998-02-01), None
Leung et al., “A 5 V, 118 db / spl Sigma//spl Delta/analog-to-digital converter for wideband digital audio,” Digest of Technical Papers of the 1997 IEEE International Conference on Solid-State Circuits, San Francisco, Feb. 6-8, 1997, pp. 218-219 and 460.

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