Method and device for realizing multi-frequency point multiplexing of paths of data

Abstract

The invention discloses a method and a device for realizing the multi-frequency point multiplexing of a plurality of paths of data. The method comprises the following steps of: generating a corresponding relationship table between multiplexing sub-frame numbers and frequency point numbers according to the control information of a plurality of frequency points; filling a plurality of paths of source code data corresponding to each frequency point number in the corresponding relationship table as multiplexing sub-frame data into the multiplexing sub-frame numbers corresponding to each frequency point number; forming the multiplexing frame data of the corresponding frequency point numbers by using the multiplexing sub-frame data in the multiplexing sub-frame numbers corresponding to each frequency point number; and packaging the multiplexing frame data of the corresponding frequency point numbers into packaged multiplexing stream (PMS) packets and outputting the PMS packets to a modulator. In the device, a control unit, a multiplexing processing unit, multiplexing packaging units of the plurality of frequency points, and a transcoding unit perform data exchange through network equipment. In the method and the device, a plurality of paths of television program data are multiplexed and converted into a plurality of paths of data code streams suitable for modulation and transmission under the condition of not increasing the running and maintenance cost.

Description

technical field [0001] The invention relates to the technical field of mobile multimedia broadcasting, in particular to a method and device for realizing multi-frequency point multiplexing of multi-channel data. Background technique [0002] At present, there are multiple industry standards for mobile multimedia broadcasting or mobile TV in the world. Among them, the CMMB (China Multimedia Mobile Broadcasting) standard is a mobile TV industry standard independently developed by China and has been widely valued. The standard includes multiple parts, among which the second part of the multiplexing specification defines the multiplexing subframe structure of video, audio, data and control information in the mobile multimedia broadcasting system and the structure of the multiplexing frame composed of multiple multiplexing subframes . With the continuous promotion and popularization of mobile TV, operators need to continuously increase mobile TV programs to meet the increasing u...

AI Technical Summary

Problems solved by technology

At present, the existing single-frequency point multiplexing method can only realize one data stream. For operators, in order to simultaneously realize the output of multi-channel programs, that is, multiple frequency point data streams, they must purchase multiple single-frequency point However, this method will lead to an increase in the operator's operating and maintenance costs

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