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:
Feb. 17, 1998
Filed:
Jun. 12, 1995
Charlene S Ku, Palo Alto, CA (US);
Charles C Stearns, San Jose, CA (US);
Olive T Tao, San Jose, CA (US);
S3, Incorporated, Santa Clara, CA (US);
Abstract
Decompression of MPEG compressed audio data is performed in a computer system by the host processor in the computer system providing preprocessing data decompression and a dedicated audio decoder engine (which is a digital signal processor) performing the filtering and windowing of the host preprocessed data. The audio decoder engine includes a data path, instruction set, registers and internal program and data memory. The host performs a large portion of the audio decompression, leaving the windowing and filtering to the audio decoder engine. Thus the computationally intensive portions of the decompression are performed more efficiently. Coefficient storage in the audio decompression engine is optimized by taking advantage of the symmetries inherent in the coefficient data, both for the filter coefficients and the windowing coefficients. Double buffer input and output buffers speed the data flow between the host processor and the audio decoder engine. The double buffers allow a continuous flow of data from the host processor to the audio decoder engine.