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Access method of Nand Flash memorizer

An access method and memory technology, which is applied in the direction of protecting storage content from loss, instrumentation, and response errors. It can solve problems such as low reliability requirements, data block corruption, and damage, and reduce the risk of data loss. The effect of increased read and write times and small memory usage

Active Publication Date: 2014-01-29
SHANGHAI SVIDEO COMM TECH
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Problems solved by technology

[0007] In the face of the above requirements, the general-purpose file system is not competent, because it will quickly cause damage to some key data blocks and damage caused by power failure, resulting in the file system being unavailable
There are also some file storage systems specifically for Nand Flash media, such as JFFS2, YAFFS2, TrueFFS, LogFS, etc., but these technical solutions are suitable for the storage of data with high reliability requirements, and the reliability requirements for video applications are not very high. High data types have the problem of obviously low storage efficiency

Method used

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  • Access method of Nand Flash memorizer
  • Access method of Nand Flash memorizer
  • Access method of Nand Flash memorizer

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0044] First embodiment of the present invention relates to a kind of access method of Nand Flash memory, this method will divide Nand Flash memory into independent data block; For each data block is assigned a unique global number in the whole Nand Flash memory, this numbering As the writing of video data continues to incre...

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Abstract

The invention relates to memory of video data, and discloses an access method of a Nand Flash memorizer. The access method comprises the steps that the Nand Flash memorizer is divided into independent data blocks, circulation writing-in of the Nand Flash memorizer is achieved by distributing a global serial number, which is unique in the whole Nand Flash memorizer, to each data block, the number of the serial numbers is continuously increased along with writing-in of the video data, it is guaranteed that each memory block is used completely evenly, all the data blocks have the completely consistent usage rate, and therefore service life of Nand Flash memory media is prolonged greatly, the memory space can be utilized more efficiently, and access to the video data can be conducted more efficiently.

Description

technical field [0001] The invention relates to storage of video data, in particular to an access method of Nand Flash memory. Background technique [0002] Vehicle video surveillance has been rapidly developed and applied in recent years. Due to the vibration of the vehicle during driving, monitoring products using traditional hard disk storage technology are facing great problems. In order to resist earthquakes, many companies have invented various shock-absorbing technologies for hard disks, but the application effects are average, the damage rate is relatively high, and the use cost is high. With the rapid development of electronic technology, storage technology based on Nand Flash has been widely used, such as SD card, USB disk and so on. The storage volume based on Nand Flash medium is getting bigger and bigger, and the price is getting lower and lower, and the natural anti-seismic characteristics of Nand Flash medium storage volume make it an inevitable trend to app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/16G06F12/16G06F11/07
Inventor 户现锋
Owner SHANGHAI SVIDEO COMM TECH
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