US6330028B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic image pickup device which is operable even when management information related to recording/reproducing image data is not readable
Assignee: Beijing Xiaomi Mobile Software Co Ltd
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Filing: 2000-05-08
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Granted: 2001-12-11
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Expires: 2020-05-08
Abstract
Abstract An image pickup device includes a flash memory wherein picked-up image data is recorded. The flash memory includes a data block that stores the image data, and managing blocks which store managing data such as directory entries and a FAR chain. Image data is entered into the data block of the flash memory while the managing data is being written. When the power supply is accidentally turned off during the data entering operation and an abnormality occurs in the managing data, correct image data cannot be read out. The image pick-up device provides measures for eliminating such troubles. To this end, the flash memory includes a data block that stores a plurality of image data files, a pair of managing blocks that manage the data block, and a pair of checksum storage areas that have stored check data used to check respective data stored in the pair of managing blocks. An abnormality in each of the two file managing blocks is detected based on a respective one of the check data stored in the two checksum storage areas.
Inventors
- 👤 Masahiro Oie
- 👤 Kazuto Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:50
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/21; H04N1/2104; H04N1/2112; H04N1/00002; H04N1/00026; H04N1/00029; H04N1/00912; H04N1/00925; H04N5/00; H04N5/76; H04N5/765; H04N5/77; H04N5/772; H04N1/32; H04N1/32101; H04N1/32128; H04N2101/00; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225; H04N2201/3254; H04N5/907; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
155 words
An information recording device, comprising: user data storage means for storing user data produced on the basis of information obtained externally; management data storage means for storing management data which manages said user data storage means; detecting means for detecting a possible abnormality in the management data stored in said management data storage means; inhibiting means responsive to the detection of an abnormality by said detecting means for inhibiting the use of the management data stored in said management data storage means, check data getting means for getting check data indicative of the contents of the data stored in said management data storage means, and check data storage means for storing the check data gotten by said check data getting means, wherein said detecting means detects an abnormality in the management data by comparing the check data stored in said check data storage means and the check data obtained by said check data getting means.
Claim 2
Dependent Claim
155 words
An information recording device, comprising: user data storage means for storing user data produced on the basis of information obtained externally; management data storage means for storing management data which manages said user data storage means; detecting means for detecting a possible abnormality in the management data stored in said management data storage means; inhibiting means responsive to the detection of an abnormality by said detecting means for inhibiting the use of the management data stored in said management data storage means, check data getting means for getting check data indicative of the contents of the data stored in said management data storage means, and check data storage means for storing the check data gotten by said check data getting means, wherein said detecting means detects an abnormality in the management data by comparing the check data stored in said check data storage means and the check data obtained by said check data getting means.
Claim 3
Dependent Claim
80 words
The information recording device according to claim 1 , further comprising another set of said management storage means, said detecting means, said inhibiting means, said check data getting means and said check data storage means, and update means responsive to detection of an abnormality only by one of said detecting means for updating the management data, stored in one management data storage means corresponding to said one detecting means, with management data stored in the other management data storage means.
Claim 4
Dependent Claim
19 words
The information recording device according to claim 2 , wherein the user data includes an electrically picked-up image data.
Claim 5
Dependent Claim
19 words
The information recording device according to claim 1 , wherein the user data includes an electrically picked-up image data.
Claim 6
Dependent Claim
141 words
An information recording device comprising: user data storage means for storing user data produced on the basis of information obtained externally; management data storage means for storing management data which manages said user data storage means; detecting means for detecting a possible abnormality in the management data stored in said management data storage means; inhibiting means responsive to the detection of an abnormality by said detecting means for inhibiting the use of the management data stored in said management data storage means, another set of said management storage means, said detecting means and said inhibiting means, and update means responsive to detection of an abnormality only by one of said detecting means for updating the management data, stored in one management data storage means corresponding to said one detecting means, with management data stored in the other management data storage means.
Claim 7
Dependent Claim
141 words
An information recording device comprising: user data storage means for storing user data produced on the basis of information obtained externally; management data storage means for storing management data which manages said user data storage means; detecting means for detecting a possible abnormality in the management data stored in said management data storage means; inhibiting means responsive to the detection of an abnormality by said detecting means for inhibiting the use of the management data stored in said management data storage means, another set of said management storage means, said detecting means and said inhibiting means, and update means responsive to detection of an abnormality only by one of said detecting means for updating the management data, stored in one management data storage means corresponding to said one detecting means, with management data stored in the other management data storage means.
Claim 8
Dependent Claim
19 words
The information recording device according to claim 5 , wherein the user data includes an electrically picked-up image data.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-12-10 | 2005-06-11 | 2005-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-10 | 2009-06-11 | 2009-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-10 | 2013-06-11 | 2013-12-11 | $7700.00 | Window Closed / Lapsed |