公开(公告)号：US20150326857A1

公开(公告)日：2015-11-12

申请号：US14275109

申请日：2014-05-12

Applicant: XIMIN ZHANG ,  SANG-HEE LEE ,  ZHIJUN LEI

Inventor： XIMIN ZHANG ,  SANG-HEE LEE ,  ZHIJUN LEI

IPC: H04N19/124 ,  H04N19/65 ,  H04N19/593 ,  H04N19/172 ,  H04N19/503

CPC classification number: H04N19/124 ,  H04N19/14 ,  H04N19/142 ,  H04N19/146 ,  H04N19/172 ,  H04N19/503 ,  H04N19/593 ,  H04N19/65

Abstract: Systems and methods for determining quantization parameter (QP) for video coding. Embodiments may be particularly advantageous for strongly temporal correlated frames, such as for video conferencing applications. An initial QP for a frame of a video sequence may be modified based on a spatial complexity or a temporal complexity associated with the video frame, and/or based on an inter-predicted frame bitrate target cycle, as a function of whether the frame is intra- or inter-predicted. The inter-predicted frame bitrate target cycle includes a sequence of two or more inter-predicted frame bitrate targets that are assigned to the frame according to the inter-predicted frame bitrate target cycle. A reference frame for an inter-predicted frame may be selected based on the bitrate target associated with candidate reference frames. Initial QP of an inter-predicted frame with a scene change may be modified in a manner independent of an inter-predicted frame bitrate target cycle.

Abstract translation: 用于确定用于视频编码的量化参数（QP）的系统和方法。 对于强时间相关帧，例如对于视频会议应用，实施例可能是特别有利的。 可以基于与视频帧相关联的空间复杂性或时间复杂度和/或基于帧间预测帧比特率目标周期来修改视频序列的帧的初始QP，作为帧是否为 内部或内部预测。 帧间预测帧比特率目标周期包括根据帧间预测帧比特率目标周期分配给帧的两个或多个帧间预测帧比特率目标的序列。 可以基于与候选参考帧相关联的比特率目标来选择帧间预测帧的参考帧。 可以以独立于帧间预测帧比特率目标周期的方式修改具有场景变化的帧间预测帧的初始QP。

公开(公告)号：US20160088298A1

公开(公告)日：2016-03-24

申请号：US14492915

申请日：2014-09-22

Applicant: XIMIN ZHANG ,  SANG-HEE LEE

Inventor： XIMIN ZHANG ,  SANG-HEE LEE

IPC: H04N19/124 ,  H04N19/91 ,  H04N19/136 ,  H04N19/159 ,  H04N19/146 ,  H04N19/176

CPC classification number: H04N19/176 ,  H04N19/126 ,  H04N19/146 ,  H04N19/149 ,  H04N19/154

Abstract: Systems, apparatus and methods are described including operations for video coding rate control including target bitrate and quality control.

Abstract translation: 描述了系统，装置和方法，其包括用于包括目标比特率和质量控制的视频编码速率控制的操作。