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A real time conversion method from MPEG-4 transmission code stream to Internet stream media alliance stream

A technology for transmitting code streams and conversion methods, applied in the field of real-time conversion, and can solve problems such as incompatibility

Inactive Publication Date: 2008-06-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The TS specification uses the TS packet encapsulation format to unify the audio stream and the video stream and multiplex them into one transport stream, while the ISMA protocol transmits the video stream and the audio stream separately, so the two specifications are incompatible with each other

Method used

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  • A real time conversion method from MPEG-4 transmission code stream to Internet stream media alliance stream
  • A real time conversion method from MPEG-4 transmission code stream to Internet stream media alliance stream
  • A real time conversion method from MPEG-4 transmission code stream to Internet stream media alliance stream

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Embodiment Construction

[0027] figure 1 Shown is the system block diagram of converting TS stream to ISMA stream in the present invention, including encoder, transcoder, IP network and terminal, wherein the transcoder receives the TS stream from the encoder, and demultiplexes the code stream Encapsulated into RTP packets, and then sent to the terminal through the IP network.

[0028] figure 2 Shown is a kind of MPEG-4 TS stream of the present invention to the real-time conversion method flowchart of ISMA stream, comprises the following steps:

[0029] Step 1. Configuration

[0030] Before starting the transcoder, perform necessary configurations on the transcoder, including video and audio encoding types, TS stream program numbers, ISMA live stream SDP (Session Description Protocol), etc., and configure them in the form of configuration files. A configuration file can Configure multiple programs at the same time. Configuration items for each program include:

[0031] 1) Program number: if the T...

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Abstract

The invention relates to a method for real-time converting transport stream TS of MPEG-4 into ISMA stream in an Internet Stream Media Alliance (ISMA), which includes the following contents: (a) parameters of a code converter is configured, including encoding type of video and audio, a program number of the TS stream, a parameter of a session description protocol (SDP) of ISMA live broadcast stream; (b) the TS stream from an encoder is received by the code converter; (c) according to the configuration information, the code converter de-multiplexes TS stream, and according to program of TS stream and PCR value of a reference clock, a corresponding frame reference time is generated by the code converter; (d) obtained video and audio data is further processed and de-multiplexed by the code converter and a real time transmission protocol (RTP) package is generated according to the configuration information and the frame reference time; and (e) after the RTP package is generated, the generated video and audio RTP package is transmitted to a network through a user datagram protocol (UDP) port configured in the parameter of the SDP or a transmission control protocol (TCP) port by the code converter.

Description

technical field [0001] The invention belongs to the field of multimedia communication, and in particular relates to a method for real-time conversion from a transport code stream (TS) of the Moving Picture Experts Group MPEG-4 to an Internet Streaming Media Alliance stream (ISMA). Background technique [0002] It is a trend to provide real-time TV video services through an IP (Internet Protocol) network, and the rise of IPTV (Internet Television) is a manifestation of this trend. IPTV is a new video service that is transmitted on the broadband Internet and uses a set-top box and a TV for display and interaction. [0003] In the IPTV system, there are currently two transmission specifications for video streams in the industry, namely the ISMA specification proposed by the Internet Streaming Media Alliance (ISMA) widely used in the Internet and the widely used one in the broadcasting network by the Moving Picture Experts Group (MPEG). Proposed TS specification. The TS specif...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/24H04L29/06
Inventor 田洪亮
Owner ZTE CORP
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