三维高效视频编码(three-dimensional high efficiency video coding,3D-HEVC)是立体视频编码扩展的国际标准化组织(Joint Collaborative Team on 3D Video Coding Extension Development,JCT-3V)推出的目前最新的3D视频编码标准,基于3D...三维高效视频编码(three-dimensional high efficiency video coding,3D-HEVC)是立体视频编码扩展的国际标准化组织(Joint Collaborative Team on 3D Video Coding Extension Development,JCT-3V)推出的目前最新的3D视频编码标准,基于3D-HEVC的三维视频编码技术的研究推动了其应用并成为目前三维视频编码技术的研究热点.在回顾3D视频编码标准发展基础上,描述了基于3D-HEVC的三维视频编码方案,对其中最为关键的三维视频纹理图与深度图编码方法与研究进展进行了重点分析与阐述.首先,对目前借助视频序列中纹理特性的三维视频纹理图编码方法展开了综述并说明其存在的问题.然后,对基于纹理特性和区域的三维视频深度图编码方法展开了分析和论述.最后,结合近年来最新的研究成果,展望了三维视频编码技术的发展并提出了新的研究课题.展开更多
In this paper, an investigation is made on compatibility of the video formats TV (625/50/2:1/4:3), EDTV (625/50/1:1/16:9), HDTVint (1250/50/2:1/16:9) and HDTVpro(1250/50/2:1/16:9) in three-dimensional subband coding. ...In this paper, an investigation is made on compatibility of the video formats TV (625/50/2:1/4:3), EDTV (625/50/1:1/16:9), HDTVint (1250/50/2:1/16:9) and HDTVpro(1250/50/2:1/16:9) in three-dimensional subband coding. A hierarchical method is proposed leading to a more reasonable joint solution for the issues of digital transmission evolution and interlace-to-progressive scanning conversion ill the frame work of bit rate compression. Conventional HDTVint with the diamond shaped spectrum is proposed to be replaced by a kind of 'switching'HDTVin signal which consists of three components and motion detection bits (MDB). The first component and the MDB represent TV. The first plus the second component and the MDB represent EDTV.HDTVpro is splitted into switching HDTVint and extra component. The switching threshold and the length of temporal filter banks are discussed. Rearranging the pixels in subbands is recommended. Based on the proposed method, the transmission system can evolve through four steps: TV, EDTV, HDTVint and HDTVpro Results of bit rate compression are also presented. TV, EDTV, HDTVint and HDTVpro are compressed to approximately 40, 80, 128 and 256 Mbit/s respectively. Interlace scanning has drawbacks such as line flicker and line crawling as the eye follows the line structure in the picture. Progressive version switching TV and HDTVint can be reconstructed using one frame memory without the problems of handling temporal-vertical diamond shaped spectra of conventional TV and HDTVint based on a one-frame memory algorithm in the receiver.展开更多
文摘三维高效视频编码(three-dimensional high efficiency video coding,3D-HEVC)是立体视频编码扩展的国际标准化组织(Joint Collaborative Team on 3D Video Coding Extension Development,JCT-3V)推出的目前最新的3D视频编码标准,基于3D-HEVC的三维视频编码技术的研究推动了其应用并成为目前三维视频编码技术的研究热点.在回顾3D视频编码标准发展基础上,描述了基于3D-HEVC的三维视频编码方案,对其中最为关键的三维视频纹理图与深度图编码方法与研究进展进行了重点分析与阐述.首先,对目前借助视频序列中纹理特性的三维视频纹理图编码方法展开了综述并说明其存在的问题.然后,对基于纹理特性和区域的三维视频深度图编码方法展开了分析和论述.最后,结合近年来最新的研究成果,展望了三维视频编码技术的发展并提出了新的研究课题.
文摘In this paper, an investigation is made on compatibility of the video formats TV (625/50/2:1/4:3), EDTV (625/50/1:1/16:9), HDTVint (1250/50/2:1/16:9) and HDTVpro(1250/50/2:1/16:9) in three-dimensional subband coding. A hierarchical method is proposed leading to a more reasonable joint solution for the issues of digital transmission evolution and interlace-to-progressive scanning conversion ill the frame work of bit rate compression. Conventional HDTVint with the diamond shaped spectrum is proposed to be replaced by a kind of 'switching'HDTVin signal which consists of three components and motion detection bits (MDB). The first component and the MDB represent TV. The first plus the second component and the MDB represent EDTV.HDTVpro is splitted into switching HDTVint and extra component. The switching threshold and the length of temporal filter banks are discussed. Rearranging the pixels in subbands is recommended. Based on the proposed method, the transmission system can evolve through four steps: TV, EDTV, HDTVint and HDTVpro Results of bit rate compression are also presented. TV, EDTV, HDTVint and HDTVpro are compressed to approximately 40, 80, 128 and 256 Mbit/s respectively. Interlace scanning has drawbacks such as line flicker and line crawling as the eye follows the line structure in the picture. Progressive version switching TV and HDTVint can be reconstructed using one frame memory without the problems of handling temporal-vertical diamond shaped spectra of conventional TV and HDTVint based on a one-frame memory algorithm in the receiver.
