METHOD FOR CONTROLLING BIT RATE IN DIGITAL AUDIO BROADCASTING SYSTEM AND APPARATUS AND METHOD FOR CONVERTING MEDIA STREAM BY USING THE SAME

摘要

Disclosed are a method for controlling a bit rate in a digital audio broadcasting (DAB) system, an apparatus and a method for converting a media stream by using the same. The media stream conversion method includes the steps of: determining a data amount of an inputted moving picture transmission stream and calculating a stream length (STL) value; calculating a data amount to be outer coded for every interval of DAB transmission frames based on the STL vale; outer coding a data with a multiple size of a packet unit for every interval of the DAB transmission frames as maintaining the data amount according to the STL value on average; and reading the outer coded moving picture transmission stream as much as the data amount according to the STL value for every interval of the DAB transmission frames to configure the DAB transmission frames and outputting the moving picture transmission stream.