The most commonly used transmission channel in nowadays provides the same level of protection for all the information symbols. As the level of protection should be adequate to the importance of the information set, it...The most commonly used transmission channel in nowadays provides the same level of protection for all the information symbols. As the level of protection should be adequate to the importance of the information set, it is justified to use UEP channels in order to protect information of variable importance. Multiresolution channel decomposition has emerged as a strong concept and when combined with H.264/AVC layered multiresolution source it leads to outstanding results especially for mobile TV applications. Our approach is a double multiresolution scheme with embedded constellation modulations on its baseband channels followed by OFDM time/frequency multiresolution passband modulation. The aim is to protect The NAL units carrying the most valuable information by the coarse constellations into coarse sub-channels, and the NAL units that contain residual data by fined constellations and transposed into the fined OFDM sub-channels. In the multiresolution protection coding, our approach is a multiresolution decomposition of the core convolutional constituent of the PCCC where the NAL units carrying the most valuable information are coded by the rugged coefficient of the multiresolution code and the NAL units that contains residual data are coded by refined less secure coding coefficients.展开更多
在2003年制定的H.264/AVC视频编码标准获得巨大的成功后,新一代视频编码国际标准HEVC(High Ef-ficiency Video Coding)在ITU-T的VCEG和ISO/IEC的MPEG通力合作下已经开发成功。HEVC提供了多项先进的视频编码技术。尽管HEVC的视频编码层...在2003年制定的H.264/AVC视频编码标准获得巨大的成功后,新一代视频编码国际标准HEVC(High Ef-ficiency Video Coding)在ITU-T的VCEG和ISO/IEC的MPEG通力合作下已经开发成功。HEVC提供了多项先进的视频编码技术。尽管HEVC的视频编码层结构仍然是常见的基于块运动补偿的混合视频编码模式,但是和先前的标准相比具有多处重要改进。文中对HEVC标准的技术的主要特点和性能进行了综述。展开更多
文摘The most commonly used transmission channel in nowadays provides the same level of protection for all the information symbols. As the level of protection should be adequate to the importance of the information set, it is justified to use UEP channels in order to protect information of variable importance. Multiresolution channel decomposition has emerged as a strong concept and when combined with H.264/AVC layered multiresolution source it leads to outstanding results especially for mobile TV applications. Our approach is a double multiresolution scheme with embedded constellation modulations on its baseband channels followed by OFDM time/frequency multiresolution passband modulation. The aim is to protect The NAL units carrying the most valuable information by the coarse constellations into coarse sub-channels, and the NAL units that contain residual data by fined constellations and transposed into the fined OFDM sub-channels. In the multiresolution protection coding, our approach is a multiresolution decomposition of the core convolutional constituent of the PCCC where the NAL units carrying the most valuable information are coded by the rugged coefficient of the multiresolution code and the NAL units that contains residual data are coded by refined less secure coding coefficients.
文摘在2003年制定的H.264/AVC视频编码标准获得巨大的成功后,新一代视频编码国际标准HEVC(High Ef-ficiency Video Coding)在ITU-T的VCEG和ISO/IEC的MPEG通力合作下已经开发成功。HEVC提供了多项先进的视频编码技术。尽管HEVC的视频编码层结构仍然是常见的基于块运动补偿的混合视频编码模式,但是和先前的标准相比具有多处重要改进。文中对HEVC标准的技术的主要特点和性能进行了综述。
