• Title/Summary/Keyword: Enhanced compatible coding scheme

Search Result 2, Processing Time 0.017 seconds

Scalable Stereoscopic Video Coding for Heterogeneous Environments (이질적인 환경을 위한 스케러블 스테레오 영상 부호화)

  • 오세찬;이영호;우운택
    • Journal of Broadcast Engineering
    • /
    • v.9 no.3
    • /
    • pp.225-235
    • /
    • 2004
  • In this paper, we propose a new stereoscopic video coding approach for heterogeneous consumer devices by exploiting the concept of spatio-temporal scalability. The proposed method uses MPEG-2 standard for coding the left or main sequence and an enhanced compatible coding scheme for predicting the P- and B-type of frames of the right or auxiliary sequence. The enhanced compatible coding scheme predicts matching block by interpolating both two forward and backward motion predicted macroblocks and disparity predicted macroblock. To provide flexible stereo video service, we define both a temporally scalable layer and a spatially scalable layer for each eye-view. The experimental results show the efficiency of proposed coding scheme by comparison with already known methods and the advantages of disparity estimation in terms of scalability overhead. According to the experimental results, we expect the proposed functionalities will play a key role in establishing highly flexible stereo video service for ubiquitous computing environment where devices and network connections are heterogeneous.

Serial Concatenated Turbo TCM Coding Scheme for Enhanced VSB (개선된 VSB 수신 시스템을 위한 직렬 연접 터보 격자변조부호 방식)

  • Heo, Seo-Weon;Kim, Chang-Joong;Lee, Ho-Kyoung
    • Journal of Broadcast Engineering
    • /
    • v.12 no.4
    • /
    • pp.373-376
    • /
    • 2007
  • Recently, research on the enhancement of the conventional VSB scheme for DTV signal transmission have been done. Not to affect on the performance of the widely spread conventional receivers and at the same time be able to receive the enhanced stream. there have been efforts to enhance the coding scheme which is backward compatible with the conventional method. The conventional schemes proposed so far is based on the idea of combining a new trellis encoder with the standard 8-VSB trellis encoder. In this paper, we Propose serial concatenated turbo TCM scheme which combines two trellis encoder with the interleaver between them. We compare the performance of the proposed scheme and the existing scheme through computer simulation.