Method for realizing editable CD file data

A technology of file data and implementation method, applied in the field of data processing, can solve the problems of increasing processing time and space overhead, inconvenient use of optical discs, inconvenient operation, etc., so as to save processing time and space overhead, improve editing efficiency, and improve editing efficiency. The effect of using efficiency

Inactive Publication Date: 2009-09-09
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

This makes the use of the disc very inconvenient, because the file data for burning needs to be re-prepared and organized, resulting i

Method used

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  • Method for realizing editable CD file data
  • Method for realizing editable CD file data
  • Method for realizing editable CD file data

Examples

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Example Embodiment

[0022] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] In the present embodiment of the present invention, the following methods are adopted for the realization of the editable disc file data:

[0024] 1. Open the file

[0025] The following flags can be used when opening a file:

[0026] ● CREATE: create a flag. If the file does not exist, create a new file.

[0027] ●TRUNCATION: Clear the file data flag. Clear the original file data.

[0028] ●APPEND: Append flag. Append data after the original data.

[0029] ● READ ONLY: Open the file as read-only.

[0030] ● WRITE ONLY: open the file in write-only mode.

[0031] ● READ AND WRITE: open the file for reading and writing.

[0032] If the file is opened successfully, the application can obtain a handle through which the application can operate the open file. Open file process such as figure 1 shown.

[0033] The ...

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Abstract

The invention discloses a method for realizing editable CD file data. A process of writing file data comprises the following steps: 11) according to file pointers, the length of new file data needing to be written, as well as the length of original file data, figuring out covering relation between new data and original data; 12) according to the covering relation, determining used space of a CD; 13) modifying old data by use of new data, or directly writing the new data into the CD; and 14) modifying the corresponding file pointers. Due to the proposal, the method can directly modify, replace, cover, add and delete the file data on the CD, and no longer needs to record a whole file again in order to modify only a small part of the data of one file. Therefore, the method has the advantages of greatly improving the efficiency of editing CD data, saving a large amount of processing time and space overhead and reducing use cost.

Description

【Technical field】 [0001] The invention relates to a data processing method, in particular to a realization method of CD file data editing. 【Background technique】 [0002] At present, there are two types of file system specifications for recording CDs on ultrasonic diagnostic equipment: one is to adopt the ISO 9660 standard file system, for example, the CD recorded by Philip's IU22 product. Second, use the UDF file system, for example, CD burning software Nero7.0. [0003] In the current mainstream recording scheme, the file data recorded on the CD cannot be modified. Once you find that there is an error in the data of a file recorded on the CD, you want to modify it, or you want to add, delete, or modify a file. When saving data, either erase all the data burned to the disc, and then burn all the data again; or burn new files on the hard disk to the disc by means of additional burning. This makes the use of the optical disc very inconvenient, because it is necessary to re-...

Claims

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Application Information

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IPC IPC(8): G11B27/034G11B27/32G06F17/30
Inventor 杨燕泉李理
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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