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    • 3. 发明申请
    • Foveated video coding system and method
    • 移动视频编码系统和方法
    • US20050018911A1
    • 2005-01-27
    • US10626023
    • 2003-07-24
    • Aaron Deever
    • Aaron Deever
    • H04N7/26H04N7/50H04N13/00G06K9/36
    • H04N19/40H04N13/161H04N13/383H04N19/126H04N19/162H04N19/17H04N19/18H04N19/187H04N19/597H04N19/61
    • In transcoding a frequency transform-encoded digital video signal representing a sequence of video frames, a foveated, compressed digital video signal is produced and transmitted over a limited bandwidth communication channel to a display according to the following method: First, a frequency transform-encoded digital video signal having encoded frequency coefficients representing a sequence of video frames is provided, wherein the encoding removes temporal redundancies from the video signal and encodes the frequency coefficients as base layer frequency coefficients in a base layer and as residual frequency coefficients in an enhancement layer. Then, an observer's gaze point is identified on the display. The encoded digital video signal is partially decoded to recover the frequency coefficients, and the residual frequency coefficients are adjusted to reduce the high frequency content of the video signal in regions away from the gaze point. The frequency coefficients, including the adjusted residual frequency coefficients, are then recoded to produce a foveated, transcoded digital video signal, and the foveated, transcoded digital video signal is displayed to the observer.
    • 在对代表视频帧序列的频率变换编码的数字视频信号进行代码转换时,根据以下方法产生移动的压缩数字视频信号并通过有限带宽通信信道传输到显示器:首先,对频率变换编码的数字视频信号进行频率变换编码 提供具有表示视频帧序列的编码频率系数的数字视频信号,其中,编码从视频信号中去除时间冗余,并将频率系数编码为基本层中的基本层频率系数,并作为增强层中的残余频率系数。 然后,在显示器上识别观察者的注视点。 编码的数字视频信号被部分解码以恢复频率系数,并且调整残余频率系数以减小远离注视点的区域中的视频信号的高频内容。 然后重新编码包括经调整的残差频率系数的频率系数以产生移动的,转码的数字视频信号,并且向观察者显示移动的经转码的数字视频信号。