HEVC 기반 고화질 지상파 양안식 3DTV 방송 시스템 기술

Abstract

A terrestrial stereoscopic 3DTV services should not have any influence on watching the existing terrestrial HDTV. The video qualities of HDTV as well as 3DTV should be maintained as high as possible within 6MHz per one channel bandwidth in ATSC standard. In order to satisfy these requirements, left- and right-view videos of stereoscopic 3DTV must be independently processed as dual stream format. Left-view video shall be compressed using MPEG-2 video standard in order to guarantee the compatibility with HDTV. On the other hand, it is possible for right-view video to be compressed by any video coding standard in terms of the compatibility with HDTV. However, in terms of video quality of HDTV as well as 3DTV, right-view video should be compressed by the video coding standard with high coding gain. Therefore, we propose a stereoscopic video encoder which adopts two different video standards, MPEG-2 and HEVC (High Efficiency Video Coding)for left- and right view videos, respectively. The coding efficiency of HEVC under standardization is to achieve four times higher than MPEG-2. We also implement a 3DTV multiplexer which multiplexes two MPEG-2 TS -one TS consists of bit-streams for audio and left-view video and another TS consists of bit-stream for right-view video - after synchronizing two bit-streams of the left- and right-view videos. It inserts additional 3DTV signaling information into MPEG-2 TS in order to support backward compatibility with HDTV services. Finally, we show the experimental results that the proposed stereoscopic 3DTV system guarantees the backward compatibility with existing terrestrial HDTV and also provides 3DTV as well as HDTV with high video quality.