Efficient Video Block Mode Changes in Second Pass Video Coding
    8.
    发明申请
    Efficient Video Block Mode Changes in Second Pass Video Coding 有权
    第二代视频编码中的高效视频块模式更改

    公开(公告)号:US20080212677A1

    公开(公告)日:2008-09-04

    申请号:US11777395

    申请日:2007-07-13

    IPC分类号: H04N11/02

    摘要: This disclosure describes techniques for second pass video coding in a multi-pass video coding scenario. The coding modes for some video blocks encoded during a second pass may be changed relative to the coding modes used for such video blocks in the first pass. However, motion information does not change for those video blocks that have the changed modes. In particular, mode changes can be made in the second coding pass relative to the modes used in the first coding pass without changing the manner in which motion information will be derived at the decoder, e.g., due to similarities between the original modes of the first pass and changed modes used in the second pass. The second pass coding techniques may also include quantization parameter adjustments, and the mode changes can cause such quantization parameter adjustments to have more profound refinements effects on the second pass coding.

    摘要翻译: 本公开描述了在多遍视频编码场景中的第二遍视频编码的技术。 在第二遍期间编码的一些视频块的编码模式可以相对于在第一遍中用于这种视频块的编码模式而改变。 但是,对于那些具有改变模式的视频块,运动信息不会改变。 特别地,相对于在第一编码通道中使用的模式,可以在第二编码通过中进行模式改变,而不改变在解码器处将导出运动信息的方式,例如,由于第一编码 第二次通过中使用的通过和更改模式。 第二遍编码技术还可以包括量化参数调整,并且模式改变可以导致这样的量化参数调整对第二遍编码具有更深刻的细化效果。