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Audio and video synchronization method, device and a digital television chip

A technology of audio and video synchronization and audio data, which is applied in the direction of TV, color TV, color TV parts, etc., can solve problems such as code errors that cannot be solved, and achieve the effect of improving program playback speed and playback synchronization

Inactive Publication Date: 2009-03-25
新奇点智能科技集团有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the above two methods are not applicable to the mobile multimedia broadcasting system, and cannot solve the problem of bit errors

Method used

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  • Audio and video synchronization method, device and a digital television chip
  • Audio and video synchronization method, device and a digital television chip
  • Audio and video synchronization method, device and a digital television chip

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Embodiment Construction

[0091] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0092] One of the core ideas of the present invention is to solve the audio and video synchronization and error of the mobile multimedia broadcasting system by establishing a mapping relationship table between the decoded audio and video data storage addresses and time stamps, and the time stamp confirmation mechanism in the audio and video playback monitoring. Code problems, to play digital TV programs in real time and accurately, and improve the sensory experience of mobile terminal users.

[0093] refer to figure 1 , which shows a flow chart of the steps of Embodiment 1 of an audio-video synchronization method for a mobile multimedia broadcasting system according to the present invention, which may specifically include the foll...

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Abstract

The invention provides an audio / video synchronization method of a mobile multimedia broadcast system, which comprises the following steps: establishing a storage address of the decoded audio data and a mapping relation table of timestamps; inquiring the mapping relation table for the timestamps of the audio data according to the storage address, to which the playing audio data point, and acquiring the timestamps of the currently playing video data; and adjusting the video playing to the audio / video synchronization state according to the timestamps of the audio data and the video data. The invention compares the playing progress of audio and video on a real-time basis based on the characteristic that the audio data are uncontrollable, and provides the corresponding adjusting opinions, so that the audio / video synchronization under the condition that the terminal can not control the 'source' can be ensured, the audio / video data timestamp confirmation mechanism is adopted to overcome the defect that error codes exist in the broadcast channel transmission, the incorrect adjustment of the audio / video synchronization caused by the error codes is overcome, and the interference of the audio / video adjustment caused by the transmission error codes of the broadcast channel is restrained.

Description

technical field [0001] The invention relates to the technical field of mobile multimedia broadcasting, in particular to an audio and video synchronization method and device for a mobile multimedia broadcasting system and a digital TV chip for receiving mobile multimedia broadcasting. Background technique [0002] Mobile multimedia broadcasting is an emerging multimedia playback technology. In recent years, this technology and standards have developed rapidly, such as digital video broadcast handheld reception (DVB-H, Digital Video Broadcast Handheld) in Europe, and media single forward link in the United States. (MediaFLO, Media ForwardLink Only) and China's mobile multimedia broadcasting system (CMMB, China Mobile MultimediaBroadcast), etc. Mobile multimedia broadcasting can provide many services for its end users, such as advertisements, weather forecasts, news, sports programs, variety shows, multimedia radio dramas, movies and other programs. Users can choose mobile mult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/04H04N7/24H04N21/434H04N21/8547
Inventor 张辉王西强曹晋宇王洪仁张岩胡伟
Owner 新奇点智能科技集团有限公司
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