APPARATUS OF AUDIO/VIDEO DATA SYNCHRONIZATION FOR TRANSMITTING DECORDED AUDIO/VIDEO DATA

摘要

An A/V data synchronization apparatus for transmitting non-compression A/V data is provided to transmit A/V data which are not compressed to an external device to be synchronized to moving picture play time. A video buffer(102) stores decoded video data, and outputs a corresponding video data bit according to a control signal. An audio buffer(104) stores decoded audio data, and outputs a corresponding audio data bit according to the control signal. A mapper(110) modulates inputted data bits as symbols having information of a predetermined size, and successively assigns the respective symbols to a sub-carrier of IFFT(Inverse Fast Fourier Transform). At least one or more IFFT units(120,122,124,126) perform the IFFT of the inputted symbols. A buffer control unit(100) obtains a ratio of data quantities between video data and audio data per second, and calculates a ratio of data quantities per second of integral times capable of being least assigned to a null sub-carrier to which data are not assigned when the symbols of the video data bit and the audio data bit are assigned to the sub-carrier of the IFFT. The buffer control unit(100) controls the video buffer(102) and the audio buffer(104) to output the video data bit and the audio data bit to the mapper(110) according to the calculated ratio of the data quantities per second of the integral times.