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.:

US 7647459 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 12, 2010

Filed:

Nov. 25, 2002
Applicants:

Weimin Zhang, San Jose, CA (US);

Tony Francesca, Pleasanton, CA (US);

Inventors:

Weimin Zhang, San Jose, CA (US);

Tony Francesca, Pleasanton, CA (US);

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 13/00 (2006.01); G06F 13/28 (2006.01); H04N 7/173 (2006.01); G11B 3/64 (2006.01); H04N 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A system for high-speed access and recording includes a demodulator, a buffer memory, and a hard disk. During a write cycle, a content stream is stored in buffer memory and thereafter transferred to the demodulator. When the buffer memory reaches its storage capacity, its contents are transferred to the hard disk for storage. During a read cycle, contents from the hard disk are read and then stored in the buffer memory. The hard disk further includes includes a high-speed zone and a random-access zone, which are configured to operate in a high-speed mode, a random-access mode, and a buffer-cleaning mode.


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