Special disk reading and writing system suitable for IPTV direct broadcast server with time shift

A technology of live broadcast server and reading and writing system, which is applied in the field of network multimedia and can solve problems such as difficult performance

Inactive Publication Date: 2007-10-24
SHANGHAI CLEARTV CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current general-purpose Linux operating system is not designed for these characteristics, and it is difficult to achieve good performance in this type of application environment

Method used

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  • Special disk reading and writing system suitable for IPTV direct broadcast server with time shift
  • Special disk reading and writing system suitable for IPTV direct broadcast server with time shift
  • Special disk reading and writing system suitable for IPTV direct broadcast server with time shift

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Experimental program
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Embodiment Construction

[0086] The specific implementation and further description of the present invention are as follows.

[0087] basic data structure

[0088] Under the Linux system, the default tmpfs memory file system is mounted under / dev / shm, so the cache blocks in the system are also stored under / dev / shm. When the live broadcast time-shift dedicated disk read-write system is initialized, a series of files will be created under / dev / shm. The files are all of the same size, and each file represents a cache block. The cache block is represented by the structure CachedBlock in the system:

[0089] struct CachedBlock{

[0090] char block_data[CACHED_BLOCK_SIZE];

[0091] int state;

[0092]}

[0093] The cache block includes the data block block_data and the flag bit state. When used to read the data block, the flag bit state uses DATA_READY and DATA_NREADY to indicate whether block_data already contains valid data.

[0094] In order to facilitate management, we also use a control blo...

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Abstract

The disclosed special disc read-write system with time-variable IPTV live server comprises: a media data buffer server including a channel management module, a buffer management module with memory based on tmpfs and memory file mapping, and a file read/write module with DIRECT/asynchronous I/O; and some buffer clients including the direct data write/read client, wherein the live server also comprises a data pre-process module, a transmission module and user management module. This invention improves entire system performance.

Description

technical field [0001] The invention belongs to the technical field of network multimedia. It specifically relates to a special disk reading and writing system suitable for a time-shifted IPTV live broadcast server and a time-shifted IPTV live broadcast server using the special disk reading and writing system. Background technique [0002] IPTV (Internet Protocol Television) uses broadband network, multimedia, communication and other technologies to provide digital TV and other interactive services to user terminals such as set-top boxes, PCs, and mobile phones. Typical IPTV applications include live video and video on demand. In the IPTV live video application, time shift (timeshift) is a very novel function point. Using the time-shifted live broadcast service, users can not only watch the live broadcast content at the current moment, but also perform real-time VCR (Video Cassette Recorder) operations on the previous period of content, including tentative, dragging, fast ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18G06F12/00
Inventor 朱陈洁黄澄叶德建
Owner SHANGHAI CLEARTV CORP LTD
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