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Digital video frequency broadcasting switching method and apparatus thereof

A technology of digital video broadcasting and conversion method, applied in the direction of TV, color TV, components of color TV, etc., can solve the problem of inability to input transmission code stream, etc.

Inactive Publication Date: 2008-05-28
XIAN TONGSHI CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The DVD player chip only accepts the program code stream and cannot input the transmission code stream, but some DVD player chips have audio serial interfaces

Method used

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  • Digital video frequency broadcasting switching method and apparatus thereof
  • Digital video frequency broadcasting switching method and apparatus thereof
  • Digital video frequency broadcasting switching method and apparatus thereof

Examples

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Embodiment Construction

[0026] see figure 1 , the concrete method of the present invention is as follows:

[0027] 1) Receive transmission stream data;

[0028] 2) Preprocessing the transmission code stream data;

[0029] 3) Adjust the bit rate of the preprocessed transmission code stream data so that it is lower than the highest rate of the audio serial interface format;

[0030] 4) converting the transmission code stream data into audio serial interface format data;

[0031] 4.1) Sorting the transmission code stream data according to the sequence requirements of the audio serial interface data to obtain the audio serial interface data DATA;

[0032] 4.2) Generate a clock BCK synchronized with the audio serial interface data DATA;

[0033] 4.3) Generate left and right channel switching signal LRCK to form audio serial interface format data.

[0034] 5) Output the audio serial interface format data from the audio serial interface.

[0035] The process of preprocessing the transmission code stre...

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PUM

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Abstract

A method for converting digital video broadcast includes receiving transmission code stream data, carrying out preprocessing on transmission code stream data, adjusting bit rate of transmission code stream data being preprocessed to let it be lower than maximum rate of audio serial interface format, converting transmission code stream data to be audio serial interface format data and outputting converted data through audio serial interface.

Description

1. Technical field [0001] The invention relates to a digital video broadcast conversion method and its device, in particular to a method and its device for converting a transmission code stream into an audio serial interface format. 2. Background technology [0002] The two data formats stipulated by the MPEG2 system are program code stream (PS) and transport code stream (TS). Among them, the program code stream is mainly designed for local applications, and the length of the data frame is not fixed. It is used in occasions with low bit errors ( Such as DVD); the transmission code stream is designed for digital video broadcasting (DVB) applications. Due to the unpredictable channel environment, the transmission code stream is composed of a fixed packet length, which is conducive to rapid synchronization in case of errors. [0003] Audio serial interfaces include LRCK, BCK, DATA, etc. Among them, BCK is the serial audio bit clock. Its function is to send the existing data o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/765
Inventor 沈雪峰
Owner XIAN TONGSHI CO
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