CN102256182A

CN102256182A - RTP (Real-time Transport Protocol)-based video stream fragment framing method

Info

Publication number: CN102256182A
Application number: CN2011102099874A
Authority: CN
Inventors: 唐廷烨
Original assignee: CHONGQING DATA TECHNOLOGY Co Ltd
Current assignee: CHONGQING DATA TECHNOLOGY Co Ltd
Priority date: 2011-07-26
Filing date: 2011-07-26
Publication date: 2011-11-23

Abstract

The invention relates to a computer data processing method, which aims at providing an RTP (Real-time Transport Protocol)-based video stream fragment framing method for solving the problem of consumption of resource in ordering and recombination of video stream fragment data in the prior art. The method comprises the following steps of: establishing a Hash table data structure at a receiving end; establishing a queue for pre-distributing memory space at the receiving end, wherein the queue is an idle queue, and each node of the queue directs to the memory space of fixed size; accepting the fragment data from a transmitting end by the receiving end through an RTP-based UDP (User Datagram Protocol) transmission mode, simultaneously, orderly filling the fragment data into the memory space corresponding to the nodes, and orderly inserting the nodes into the Hash table according to the order of being filled with the fragment data; and at the receiving end, assembling the fragment data according to the node filling order in the Hash table, and outputting frame data. In comparison with the background technology, the method uses a Hash algorithm, and only copies the recombination of the fragment data in a computer memory once, thereby improving efficiency.

Description

A kind of video flowing burst framing method based on Real-time Transport Protocol

Technical field

The present invention relates to a kind of And Methods of Computer Date Processing.

Background technology

This practical information relates to a kind of video rtp streaming burst framing algorithm, be meant that video flowing is when Network Transmission, because it is restricted when adopting the UDP mode to transmit to the size of data of each transmission, therefore the one-frame video data burst repeatedly must be transmitted, dock the process that the fragment data of receiving is reassembled into video requency frame data at receiving terminal according to minute sheet mode then.

Frame of video burst transmission, during to fragment data framing again, computer needs sort and recombinate fragment data again, can expend a large amount of CPU of computer and memory source like this at receiving terminal.

Summary of the invention

The invention is intended to provide a kind of video flowing burst framing method, with ordering that solves video flowing fragment data in the prior art and the problem that reorganization expends a large amount of CPU of computer and memory source based on Real-time Transport Protocol.

Purpose of the present invention can reach by following measure: a kind of video flowing burst framing method based on Real-time Transport Protocol, and it may further comprise the steps:

One, sets up the Hash list data structure at receiving terminal;

Two, set up the formation of a preassignment memory headroom at receiving terminal, this formation is an idle queues, and each node of formation points to the memory headroom of fixed size;

Three, by UDP transmission means based on Real-time Transport Protocol, receiving terminal is accepted the fragment data from transmitting terminal, in the memory headroom of the described node correspondence of simultaneously described fragment data being packed into successively, by the order that is loaded into fragment data described node is inserted the Hash table successively simultaneously;

Four,, fragment data is assembled the output frame data according to the order of packing into of node in the Hash table at receiving terminal.

Described transmitting terminal and receiving terminal are the computer system that possesses necessary hardware configuration, connect by cable or GRPS device talk therebetween, and video data is stored in the transmitting terminal, and the receiving terminal desire receives described video data.

The purpose of this programme is efficiently the fragment data of video transmission to be carried out framing, compare with background technology, specifically used hash algorithm, the reorganization of fragment data in calculator memory also only needed copy once, therefore improved efficient, the ordering of fragment data and reorganization no longer expend a large amount of CPU of computer and memory source.

Further, in described step 3: at first in idle queues, obtain a node, a fragment data is copied the into memory headroom of this node sensing, and indicate length; Then this node is deleted in idle queues, and this node is inserted the Hash table,

With the whole graftabls of described fragment data in groups space, the node that fragment data will be housed simultaneously inserts the Hash table according to above-mentioned steps.

Technique scheme is simple and clear easily to be implemented, and can realize the technique effect described in first scheme equally.

Further, in described step 3: when described idle queues is all packed fragment data into, after to installed fragment data framing output, empty formation.This feature can guarantee to be unlikely to make mistakes when the fragment data total amount of frame data exceeds in the idle queues the corresponding capacity of the corresponding memory headrooms of all nodes, and processing mode is more flexible.

Further, in described step 3: insert Hash when table successively at node, judge the fragment data type of present node correspondence,, then continue with all pack into the memory headroom of idle node correspondence of the fragment data of remainder if not last fragment data; If last fragment data is then packed into according to node in the Hash table and fragment data is assembled the output frame data in proper order.This feature has been arranged the processing mode of end fragment data, and end operation rapidly after the fragment data of each frame disposes has improved operating efficiency.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:

Fig. 1 is the flow chart of video fragment data framing in the embodiment of the invention.

Embodiment

Disclosed a kind of video flowing burst framing method based on Real-time Transport Protocol in the present embodiment, be connected by cable with PC as receiving terminal as the server of transmitting terminal, existing desire is delivered to receiving terminal with video data from transmitting terminal, idiographic flow as shown in Figure 1:

Set up the Hash list data structure at receiving terminal.

In the formation that receiving terminal is set up a preassignment memory headroom, this formation initial condition is an idle queues, and each node of formation points to the memory headroom of fixed size.

By the UDP transmission means based on Real-time Transport Protocol, receiving terminal is accepted the fragment data from transmitting terminal, at first obtains a node in idle queues, a fragment data is copied the into memory headroom of this node sensing, and indicate length; Then this node is deleted in idle queues, and this node is inserted the Hash table.

Insert Hash when table successively at node, judge the fragment data type of present node correspondence,, then continue the fragment data of remainder according to all pack into the memory headroom of idle node correspondence of sample if not last fragment data; If last fragment data is then packed into according to node in the Hash table and fragment data is assembled the output frame data in proper order.

When described idle queues is all packed fragment data into, after to installed fragment data framing output, empty formation, carry out the remaining not operation of the fragment data of framing as yet.

At last, according to the order of packing into of node in the Hash table fragment data is assembled, the output frame data are finished the transmission work of frame data.

Above-described only is preferred implementation of the present invention; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from structure of the present invention; can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not influence effect of the invention process and practical applicability.

Claims

1. video flowing burst framing method based on Real-time Transport Protocol is characterized in that may further comprise the steps:

Set up the Hash list data structure at receiving terminal;

In the formation that receiving terminal is set up a preassignment memory headroom, this formation initial condition is an idle queues, and each node of formation points to the memory headroom of fixed size;

By UDP transmission means based on Real-time Transport Protocol, receiving terminal is accepted the fragment data from transmitting terminal, in the memory headroom of the described node correspondence of simultaneously described fragment data being packed into successively, by the order that is loaded into fragment data described node is inserted the Hash table successively simultaneously;

At receiving terminal, fragment data is assembled the output frame data according to the order of packing into of node in the Hash table.

2. the video flowing burst framing method based on Real-time Transport Protocol according to claim 1 is characterized in that in described step 3: at first obtain a node in idle queues, a fragment data is copied the into memory headroom of this node sensing, and indicate length; Then this node is deleted in idle queues, and this node is inserted the Hash table,

3. the video flowing burst framing method based on Real-time Transport Protocol according to claim 1 and 2 is characterized in that in described step 3: when described idle queues is all packed fragment data into, empty formation after to installed fragment data framing output.

4. the video flowing burst framing method based on Real-time Transport Protocol according to claim 3, it is characterized in that in described step 3: when node inserts the Hash table successively, judge the fragment data type of present node correspondence, if not last fragment data, then continue all pack into the memory headroom of idle node correspondence of the fragment data of remainder; If last fragment data is then packed into according to node in the Hash table and fragment data is assembled the output frame data in proper order.