File system in device of recording and playing back sounds and images under embedded type environment

A file system and embedded technology, applied in the field of disk file system, can solve problems such as affecting the real-time performance of the system, low storage efficiency, affecting real-time performance, etc., to achieve less memory and hard disk I/O access resources, efficient and concise system , the effect of easy operation

Inactive Publication Date: 2005-08-31
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2) Compared with the memory and CPU, the speed of the hard disk is low. If the time spent on reading and writing the hard disk is too long, it will seriously affect the real-time performance of the system, and then affect the performance of the entire PVR
[0010] 4) The user's operation is arbitrary, and the length of different programs and the parts of interest to the user are also uncertain, so the file size is unknown, and the file system must support dynamic file size allocation and management
The low storage efficiency of the file system will affect the real-time performance, and the file system itself occupies too much memory, which will lead to resource shortage

Method used

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  • File system in device of recording and playing back sounds and images under embedded type environment
  • File system in device of recording and playing back sounds and images under embedded type environment

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Although in the following description the file system of the present invention is illustrated by using a PVR with a hard disk as a storage medium as an example, it should be understood that the present invention is also applicable to audio and video recording and playback in other embedded environments such as large-capacity storage media such as optical discs. device.

[0031] like figure 1 As shown, the hard disk in the PVR can be divided into multiple partitions. As in the prior art, a partition table is provided on the hard disk to describe its partition information. The partition table shows the logical partition structure of the hard disk, and indicates that the physical hard disk is divided into several logical disks and the starting sector number and size of each logical disk. The partition table is stored in the boot sector (...

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Abstract

The present invention discloses a file system of audio-video recording and displaying device under the embedded environment. Said system includes: creating super block area which is used for storing positions of bit map area, directory area, index node area and data area on the described storage medium; bit map area which is used for storing bit map, the described bit map is a string of binary bits, every binary bit can represent the occupied state of one block on the described storage medium; the directory area for storing directory item, the described directory item includes file name of the file and index node number of said file at the entry of index node area; the index node area used for storing index node, every index node has a number; and data area which is used for storing digital audio-video file data.

Description

technical field [0001] The invention relates to a disk file system, more specifically, the invention relates to a file system used in an audio-video recording and playback device in an embedded environment. Background technique [0002] Audio-visual recording and playback devices in the embedded environment, such as personal video recorders (PVR, Personal Video Recorder) and digital video recorders (DVR, Digital Video Recorder), are large-capacity storage media (hard disks or rewritable CDs) combined with set-top boxes And the product that appears, it can be used to receive and watch the program or save the program in the local storage medium in digital format, it not only has the same function as the traditional analog video recorder, but also introduces new features such as time-shifted playback, Greatly facilitate the user. Time-shifting playback, English called TIME-SHIFTING, means that when watching TV programs, you leave for a while, record the programs into the hard ...

Claims

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Application Information

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IPC IPC(8): G06F12/02
Inventor 王劲林彭红卿曾学文陈晓倪宏
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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