Clock synchronization module and its method for playing audio/video signal synchronously

A clock signal and synchronization module technology, applied in synchronization devices, digital transmission systems, electrical components, etc., can solve the problems of unable to play audio and video signals smoothly, unable to synchronize signals, and incomplete clock signals.

Inactive Publication Date: 2006-10-04
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the clock signal output by the output module may be incomplete, or due to network delay, interference or other factors during transmission,

Method used

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  • Clock synchronization module and its method for playing audio/video signal synchronously
  • Clock synchronization module and its method for playing audio/video signal synchronously
  • Clock synchronization module and its method for playing audio/video signal synchronously

Examples

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Embodiment Construction

[0022] Please refer to figure 1 , which is a block diagram of the receiver module according to the first embodiment of the present invention. The receiver module 100 includes a clock synchronization module 110 and a signal processing module 120 . The clock synchronization module 110 is used to control the playing of the video and audio signal S3 , and includes a phase locked loop unit (Phase Locked Loop, PLL) 111 and a synchronization processing unit 112 . The PLL unit 111 is used for receiving an output clock signal Ctx. When the PLL unit 111 receives the output clock signal Ctx for the first time, the PLL unit 111 generates a receiving clock signal Crx according to the output clock signal Ctx. The synchronization processing unit 112 is used for receiving the program clock signal C1 and the receiving end clock signal Crx. The signal processing module 120 includes a depacketizer (Depacketizer) 121 and a decoder 122 . The depacketizer 121 receives the packetized signal S1 a...

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Abstract

The invention relates to a clock synchronic module and its method for synchronic playing image and sound signal. The clock synchronic module comprises a locking phase circuit unit and a synchronic processing unit. The locking phase circuit unit is used to receive the output end clock signal, when the locking phase circuit unit first receives the output end clock signal; it generates the receiving end clock signal by the output end clock signal. The synchronic processing unit receives the program clock signal and the receiving end clock signal. When the output end clock signal is small, the receiving end clock signal generates and has M clocks; when the receiving end clock signal is small, it generates and has N clocks.

Description

technical field [0001] The invention relates to a clock module and a method for playing video and audio signals, and in particular to a clock synchronization module and a method for synchronously playing audio and video signals. Background technique [0002] Wireless broadband Internet access has entered the stage of popularization, such as international airports, hotels, coffee chain stores, etc., all have similar services. Users only need to use their notebook computers or PDAs, insert the wireless LAN card (Wireless LAN Card), and roam freely in the network world. The acquisition and utilization of network resources are not limited by space, which is fast and convenient. [0003] In a real-time encode system, using wireless broadband technology to transmit video and audio data and play it immediately is also an application of wireless technology. In addition to outputting video and audio data to the receiving module, the output module will also output a clock signal to t...

Claims

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Application Information

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IPC IPC(8): H04L7/033
Inventor 秦颐隆李昌鸿
Owner BENQ CORP
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