Method and device for network transmission of digital movie

A technology for digital film and network transmission, applied in digital transmission systems, devices for providing special services by sub-bureaus, and data exchange networks, etc. It can solve the problems of lower bandwidth utilization, data transmission efficiency, and large bandwidth occupation, and shorten the distribution time. , Improve sending efficiency, improve efficiency and stability

Inactive Publication Date: 2009-10-28
CHINA BROADCASTING TELECOMM
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The current error correction method is usually to insert a number of redundant packets when sending data packets, and the receiving end can use the redundant packets to restore the lost source data packets. The higher the redundancy (the ratio of redundant packets to data packets), the higher the redundancy. The stronger its error correction ability, but at the same time it brings the problem that it occupies a larger bandwidth, which reduces the utilization rate of bandwidth and the efficiency of data transmission.

Method used

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  • Method and device for network transmission of digital movie
  • Method and device for network transmission of digital movie
  • Method and device for network transmission of digital movie

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] In this example, the sender server uses a program to open two memory areas, one large and one small, as caches, the larger cache as the first-level cache, and the smaller cache as the second-level cache.

[0022] see figure 2 Flowchart of the sending server working software program, after the program starts, work according to the following steps:

[0023] Step 200: start;

[0024] Step 210: add the release plan, and open the listening port at the same time, and listen to the information sent back by the server at the receiving end;

[0025] Step 220: Waiting for whether the plan starts, if it turns to step 230, if not, continue to wait;

[0026] Step 230: read the original digital movie file from the storage hard disk by the primary cache of the sending server;

[0027] Step 240: the second-level cache reads data from the first-level cache;

[0028] Step 250: grouping, numbering, and encapsulating the data in the secondary cache into data packets of a specified IP ...

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Abstract

The invention relates to a method and a device for network transmission of a digital movie. A read digital movie file is grouped, numbered and packed by a sending terminal and is sent to a receiving terminal by a satellite link; after receiving data packets, the receiving terminal counts the number of wrong packets and transmits the information of the wrong packets back to the sending terminal; and the sending terminal complementally sends lost or damaged data packets to the receiving terminal according to the transmitted information of the wrong packets until the receiving terminal generates a complete digital movie file after receiving a complete data packet. The invention starts an L2 cache in a memory of a server of the sending terminal. An L1 cache with larger capacity reads the original digital movie file, and the L2 cache with smaller capacity reads data from the L1 cache and groups, numbers and packs the data read by the L2 cache. The invention can enhance the speed and the stability to read the file of the sending terminal and improves the use ratio of the network bandwidth and the transmission efficiency of the data.

Description

technical field [0001] The invention belongs to a network data transmission method and device, in particular to a digital movie network transmission method and device. Background technique [0002] At present, the distribution method of digital movies is to copy the digital movies to a hard disk with a large storage capacity, and send them to the post office or send someone to deliver them. This method is the same as the traditional film distribution method, but the distribution speed is slow and the efficiency is low. With the rapid development of digital movies, the establishment of a large-scale and efficient digital movie distribution network has become an important means of popularizing digital movies, and it is also an important link for digital movie operators to ensure the effective operation of the industry. [0003] The network transmission mode of digital movies is that the sending end transmits the original digital movie files to multiple user receiving ends thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L1/00H04L12/56H04L29/06H04N7/24
Inventor 蒋振伟麻文斌魏然
Owner CHINA BROADCASTING TELECOMM
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