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Device and method for timed synchronous transmission stream decoding and coding

A technology of timing synchronization and transmission stream, applied in the direction of code conversion, automatic power control, electrical components, etc., which can solve the problems of high implementation cost and implementation difficulty.

Inactive Publication Date: 2012-01-11
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Using the above-mentioned phase-locked loop method to recover the clock, so that the decoding clock is synchronized with the encoding clock, the synchronization process of decoding and encoding can be completed very well. However, this method of recovering the clock needs to use a voltage-controlled crystal oscillator. The voltage-controlled crystal oscillator is passed It is not only difficult to implement, but also the cost of implementation is relatively high

Method used

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  • Device and method for timed synchronous transmission stream decoding and coding
  • Device and method for timed synchronous transmission stream decoding and coding
  • Device and method for timed synchronous transmission stream decoding and coding

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Embodiment Construction

[0051] The present invention provides a device for timing synchronization of transport stream decoding and encoding. The device provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] Such as image 3 As shown in the figure, it is a structural diagram of a device for timing synchronization of transport stream decoding and encoding in this embodiment. This embodiment includes a counter, a reconfiguration pulse counter, a comparator, and a reconfiguration control module. The redistribution pulse counter is connected with the counter, the comparator is respectively connected with the counter and the redistribution control module, and the redistribution control module is connected with the redistribution pulse counter.

[0053] Wherein, the reconfiguration control module is used to configure the count value for the reconfiguration pulse counter, and in the initial state, configure the init...

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Abstract

The device includes reset pulse counter (RPC), counter, comparator, reset control module. The method includes following steps: configuring initial count value for the reset pulse counter; RPC carries out counting pulses output from decoding clock, and outputs interrupt; counter takes count of number of interrupt output from RPC; one input end of the comparator receives difference value between two consecutive referenced encoding clocks to calculate encoding time, and the other end of the comparator receives number of interrupt from the counter to calculate decoding time; the comparator compares whether the encoding time is equal to decoding time; if not, then adjusting counting value of RPC. The invention makes synchronization between decoding clock and encoding clock by using simple step.

Description

technical field [0001] The invention relates to a device and method for timing synchronization of decoding and encoding of multimedia data, in particular to a device and method for synchronizing transmission stream decoding and encoding. Background technique [0002] With the development of multimedia technology, the video, audio and other auxiliary data of a program are digitally processed, compressed and encoded to form the elementary stream ES (Elementary Stream) of video, the elementary stream of audio and the elementary stream of other auxiliary data; Different basic streams are packaged into PES (Packetised ES) packets with headers respectively. For the multiplexing and effective transmission of multiple data program streams, the PES packets are inserted into transport stream packets (TS packets) or program stream packets as load splits. (PS packets), respectively, a program stream PS (Program Steam) based on variable-length packetization and a transport stream (Transp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/00H03M7/30
Inventor 戴春泉董欣
Owner VIMICRO CORP