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Method, equipment and system for processing video message

A processing method and message technology, applied in the field of video communication, can solve the problems of little meaning, complicated timestamp overhead processing, high conversion cost and equipment maintenance overhead, etc.

Active Publication Date: 2009-08-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In BTV, the RTP timestamp overhead processing is relatively complicated, but it is of little significance in practical applications, and special conversion equipment (such as DVB-IP conversion gateway) is required, and the conversion cost and equipment maintenance overhead remain high

Method used

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  • Method, equipment and system for processing video message
  • Method, equipment and system for processing video message
  • Method, equipment and system for processing video message

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a method for processing video packets. Refer to the detailed description below figure 2 Describe in detail the processing method according to the video message of the present invention, the method comprises:

[0025] Step S110, receiving a video packet encapsulated in TS over UDP format; this step is performed by the forwarding device of the operator;

[0026] Step S120, inserting sequence identification information into the load of the video message; wherein, the sequence identification information may be a simplified real-time transport protocol (RTP) header, a transport stream (TS) carrying a sequence number of a message, or directly inserted into the video message The message sequence number on the message load, or the identification of the sequence number in the IP message header; wherein, the simplified RTP header can only include the payload type (PT, Payload Type) field and the sequence number (SN) field, and the carrying message The ...

Embodiment 2

[0030] This embodiment provides a method for inserting sequence identification information. Refer below image 3 Describe the method in detail. The method includes: inserting a customized simplified RTP header after the UDP header for a stream in the TS over UDP encapsulation format, and sequentially filling sequence numbers in the new RTP header. Simplify the RTP header to specify a specific PT. The only purpose of the RTP header is to carry the SN for error packet repair. A simplified RTP header can be used, which only contains the PT and SN fields, and does not include the header timestamp and SSRC fields (if Filled with 0), the version (V, Version) field is still filled with 2 to maintain backward compatibility. You can specify a specific PT value to identify this type of RTP, or you can use the existing PT value and use other bits to distinguish it. It is also possible to define a new 4-byte simplified RTP header (such as adopting a new v value), and the header format ...

Embodiment 3

[0033] This embodiment provides another method for inserting sequence identification information. Refer below Figure 4Describe the method in detail. The method includes: inserting a TS carrying a message sequence number into the load of the video message, and specifying a specific packet identification (PID, Packet Identification), which is used to identify that the TS carries a message sequence number. A sequence number is generated every six transport stream data (TS) at the time. Among them, MPEG-2 stipulates 4 program-specific information (PSI, Program Specific Information), including program association table (PAT, Program Association Table), conditional access table (CAT, Conditional Access Table), program mapping table (PMT, Program Map Table), Network Information Table (NIT, Network Information Table). The PIDs corresponding to the first two are 0 and 1 respectively, and the PIDs of the latter two groups are specified by PAT.

[0034] In this embodiment, sequence ...

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Abstract

The invention provides a video message processing method and a piece of equipment and a system thereof, wherein the video message processing method comprises the following steps: the video message encapsulated in a TS over UDP format is received; sequence identification information is inserted to the load of the video message; the video message provided with the inserted sequence identification information is transmitted to a receiving device. The method has an advantage that by adding sequence identification information to the message encapsulated in the TS over UDP format when the forwarding equipment of operators is transmitting and processing, a receiver can detect lost and error packages and ask for the retransmission of lost message according to a serial number.

Description

technical field [0001] The present invention relates to the field of video communication, in particular to a method, device and system for processing video messages. Background technique [0002] According to the definition in "ETSI TS 102 034 v1.3.1 (Transport of MPEG 2 Transport Stream (TS) Based DVB Services over IP Based Networks-200709), audio and video streams and business information in interactive network television systems (IPTV) Multiplexed to an effective Moving Pictures Experts Group (MPEG, Moving Pictures Experts Group) transport stream (TS, TransportStream). The generated TS message is encapsulated in a direct User Datagram Protocol (UDP, User Datagram Protocol) manner (TS over UDP) or in an RTP (Real-time Transport Protocol, Real-time Transport Protocol) manner (TS over RTP). When TS is directly encapsulated in UDP, that is, when the TS over UDP encapsulation format is used, the encapsulation format is as follows Figure 1A shown. When TS is encapsulated in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N21/6437
Inventor 郑合文严为杨友庆
Owner HUAWEI TECH CO LTD
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