Audio/video synchronization and anti-shaking method of transport stream

A technology for synchronizing audio and video and transporting streams, which is applied in digital video signal modification, TV, electrical components, etc. It can solve problems such as audio and video out-of-sync, audio or video pause, etc., to ensure smoothness, improve reliability, and guarantee The effect of audio and video synchronization

Active Publication Date: 2010-09-29
深圳市华曦达科技股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] When the transport stream network jitter occurs in the above two methods, since there is no good way to predic

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  • Audio/video synchronization and anti-shaking method of transport stream
  • Audio/video synchronization and anti-shaking method of transport stream
  • Audio/video synchronization and anti-shaking method of transport stream

Examples

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Embodiment Construction

[0039] The present invention sets the program clock reference obtained for the first time as the reference time during the analysis process of the transport stream, and can adjust the reference time when the network jitters, and use the reference time to calculate the effective time of audio and video. Timestamp, so as to realize the synchronization of audio and video, and improve the reliability of network transmission.

[0040] Since the audio, video and PSI (Program Specifically Information, program specific information) data of each program in the transport stream (Transport Stream, TS stream) are transmitted independently; therefore, in the process of multiplexing and demultiplexing of the transport stream , it is necessary to add specific information to represent when any part of each program is presented; that is, to add a certain time information in real time when multiplexing, and then present the audio and video content according to the time information when demultipl...

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Abstract

The invention discloses an audio/video synchronization and anti-shaking method of a transport stream, which is applied to the resolving process of the transport stream. The transport stream comprises program clock reference, an audio emergence time stamp and a video emergence time stamp. The audio/video synchronization and anti-shaking method of the transport stream comprises the following steps of: setting acquired first-time program clock reference as reference time; judging whether a network generates shaking or not; if so, updating the reference time; if not, carrying out a next step; and calculating an audio effective time stamp or a video effective time stamp according to the reference time and the audio emergence time stamp or the video emergence time stamp. The audio/video synchronization and anti-shaking method of the transport stream realizes the mutation of the audio effective time stamp to acquire linearly increased audio/video effective time stamps by regulating the reference time when the network generates the shaking, thereby ensuring videos to be smooth and fluent and audios/videos to be synchronized and enhancing the reliability of network transmission.

Description

technical field [0001] The invention relates to audio and video synchronization technology, in particular to transmission stream audio and video synchronization and anti-shaking methods. Background technique [0002] Transport streams are defined for program transmission and storage in environments where significant errors may occur. Therefore, when the transport stream network jitter is caused by poor signal or external interference, in order to ensure its normal operation, it is necessary to provide a special mechanism to reduce or eliminate the impact of network jitter. This special mechanism is the transport stream anti-jitter mechanism. For example: when a mobile digital receiving terminal enters an area with a strong network signal into an area with a weak signal and then returns to an area with a strong signal, network fluctuations will occur in the process. In an area with a weak signal, the mobile digital receiving terminal The data cannot be received or the receiv...

Claims

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Application Information

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IPC IPC(8): H04N7/62H04N7/64H04N19/89
Inventor 胡小华
Owner 深圳市华曦达科技股份有限公司
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