The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2001
Filed:
Apr. 15, 1999
Applicant:
Inventor:
Chi-Chen Cheng, Taipei, TW;
Assignee:
C-Media Electronics Inc., Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/00 ; H03M 3/00 ; H03M 1/12 ;
U.S. Cl.
CPC ...
H03M 1/00 ; H03M 3/00 ; H03M 1/12 ;
Abstract
A system for processing Sigma-Delta CODEC. The system includes modulation/demodulation device, Bus, a software-controlled digital signal processor, and Virtual Device Driver (Vxd). Providing high speeds data for operational analysis, transmission and access by the processing ability of CPU and interrelated aided circuits. The present invention provides various digital signal processes that the Virtual Device Driver (Vxd) mates with the processing ability of CPU without replacing by other hardware device (such as the sound card).