Lossless audio hiding method for synchronous audio-video coding

The absence of audio-video synchronization has been one of the most annoying effects in multimedia application. This paper proposes a lossless information hiding method for synchronous audio-video coding. The binary bits of an encoded audio signal are embedded into the DCT domain of the video data to produce synchronous hybrid signal which is further encoded. The decoder can extract the audio bits from the hybrid bit stream, and thus, is able to reconstruct the separate signals. This scheme enables synchronous coding, transmission, storage and playback of a video signal and the associated audio signal. Experimental results show that the proposed method outperforms competing techniques in terms of both the reconstructed video and audio quality.