Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Audio and video synchronization method of embedded multimedia playing system

An embedded multimedia, audio and video synchronization technology, applied in the field of communication, can solve the problem of inability to meet users' requirements for high-definition video, and achieve the effect of improving user experience.

Active Publication Date: 2014-02-26
TIANJIN BEIHAI COMM TECH
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, in the traditional PIS system, the transmission and release of multimedia information is realized through analog or semi-digital methods. With the development of network technology and computer technology, the existing technology can no longer meet the needs of users for high-definition video. Require

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Audio and video synchronization method of embedded multimedia playing system
  • Audio and video synchronization method of embedded multimedia playing system
  • Audio and video synchronization method of embedded multimedia playing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Such as Figures 1 to 4 Shown:

[0049] An audio-video synchronization method of an embedded multimedia playback system of the present invention comprises the following steps:

[0050] Step 1. Receive the audio and video data stream, sort and decode:

[0051] Start the thread for receiving RTP audio and video packets, receive the RTP packets, and then analyze them to analyze the data types they carry, that is, RTP audio packets or RTP video packets. If the RTP audio packets enter the audio receiving buffer, they are sent to the audio decoding If the RTP video packet enters the queuing buffer, the RTP video packet is first sorted before decoding, and then sent to the video decoder for decoding;

[0052] Such as figure 2 As shown, it is the processing process of the video frame just entering the queuing buffer:

[0053] The RTP video packet directly enters the queuing buffer, and first judges according to the packet number carried by the RTP video packet.

[0054] I...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an audio and video synchronization method of an embedded multimedia playing system. The audio and video synchronization method of the embedded multimedia playing system is characterized by including the following steps that firstly, audio and video data streams are received and decoded; secondly, audio and video frames which are decoded flow into a display buffering zone or a queue jumping buffering zone, and the audio frames which are decoded enter an audio buffering zone, wherein the video frames which are decoded according to a normal sequence enter the display buffering zone, and the last-group video frames of which last-group decoding is later than next-group decoding enter the queue-jumping buffering zone; thirdly, synchronized playing is performed. The audio and video synchronization method of the embedded multimedia playing system has the advantages that the audio and video synchronization method is applied to the PIS of the rail transit industry, multimedia information can be issued from an OCC and transmitted to a vehicle, the function of synchronously displaying audios and videos to passengers is achieved finally, and the user experience degree when the passengers take metro vehicles is improved.

Description

technical field [0001] The invention belongs to the communication field, in particular to an audio and video synchronization method for an embedded multimedia playback system. Background technique [0002] Due to factors such as network unreliability and transmission delay, real-time data communication often encounters a series of problems such as packet loss, disorder, jitter, and repetition. In order to effectively transmit real-time data in the network, IETF (Internet Engineering Task Force, Internet Engineering Task Force) developed RTP (Real-timeTransport Protocol, real-time transport protocol). RTP provides end-to-end transmission services for data with real-time characteristics such as interactive audio and video, including two closely related protocols RTP and RTCP (Real-time Transport Control Protocol, Real-time Transport Control Protocol). [0003] RTP is a transport protocol for multimedia data streams on the Internet, but RTP itself does not provide a reliable d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04N21/6437H04N21/8547H04N21/4405H04N21/439
Inventor 张涛
Owner TIANJIN BEIHAI COMM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com