会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 10. 发明申请
    • MODEL BASED RATE CONTROL FOR PREDICTIVE VIDEO ENCODER
    • 用于预测视频编码器的基于模型的速率控制
    • WO2006096869A3
    • 2007-06-21
    • PCT/US2006008755
    • 2006-03-09
    • EG TECHNOLOGY INCYANG KYEONG HOKIM HYUNG JOON
    • YANG KYEONG HOKIM HYUNG JOON
    • H04N11/04H04B1/66H04N5/14H04N7/12H04N9/64H04N11/02
    • H04N19/194H04N19/124H04N19/142H04N19/149H04N19/159H04N19/172H04N19/176H04N19/177H04N19/61
    • A real-time single pass variable bit rate control strategy is provided to achieve variable bit rate (VBR) MPEG-2 encoding in a video compression system (fig. 1). For a sequence of frames, the level of encoding difficulty of a video interval (i.e., a group of pictures (GOP)) is determined by a perceptual rate -quantization (C-Q) model (101 of fig. 1). This model assigns a composite (C-Q) curve to each video interval from which the number of bits for the video interval is estimated. The estimation relies on a causal predictive model using the parameters obtained from previously encoded video intervals. The R-Q relationship of each picture type is updated and picture bits are assigned, based on the total rate of the video interval under analysis (103 of fig. 1). Robustness of the variable bit rate control strategy is ensured throughout scene transitions and instabilities by applying, for example, a non-linear median filter, and a low pass filter, respectively (101 of fig. 1).
    • 提供实时单通可变比特率控制策略,以实现视频压缩系统中的可变比特率(VBR)MPEG-2编码(图1)。 对于帧序列,通过感知速率量化(C-Q)模型(图1的101)来确定视频间隔的编码难度级(即一组图像(GOP))。 该模型将复合(C-Q)曲线分配给每个视频间隔,从中估计视频间隔的位数。 该估计依赖于使用从先前编码的视频间隔获得的参数的因果预测模型。 基于所分析的视频间隔的总速率(图1的103),更新每个图像类型的R-Q关系并分配图像比特。 通过分别应用例如非线性中值滤波器和低通滤波器(图1的101),可以在场景转换和不稳定性中确保可变比特率控制策略的鲁棒性。