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    • 91. 发明授权
    • Bit-rate control method and device combined with rate-distortion optimization
    • 比特率控制方法和设备结合速率失真优化
    • US07916783B2
    • 2011-03-29
    • US10521877
    • 2002-09-23
    • Wen GaoSiwei MaYan Lu
    • Wen GaoSiwei MaYan Lu
    • H04N11/02
    • H04N19/567H04N19/107H04N19/124H04N19/14H04N19/147H04N19/15H04N19/152H04N19/172H04N19/176H04N19/19H04N19/194H04N19/61
    • In the invention, a rate distortion optimization (RDO) based rate control scheme is comprised of following two steps: first, does bit allocation for every frame in a GOP, and based on the allocated bits, a predicted quantization parameter is used to do the first rate distortion optimization mode selection for every macroblock in the current frame; second, the information of the current macroblock collected from the first rate distortion mode selection is used to calculate a final quantization parameter for rate control, and if the final quantization parameter is different from the predicted one, a second rate distortion mode selection will be executed again. A rate distortion optimization based rate control implementation includes following modules: a video coding encoder module (for example, H.264/JVT processing module), rate distortion optimization based macroblock mode selection and adaptive quantization module, virtual buffer, and global complexity estimation module. As RDO and rate control are considered together in the invention, the RDO based rate control scheme can achieve better coding performance while with accurate target bitrate control.
    • 在本发明中,基于速率失真优化(RDO)的速率控制方案包括以下两个步骤:首先,对GOP中的每一帧进行比特分配,并且基于所分配的比特,使用预测的量化参数来执行 对当前帧中的每个宏块进行一次失真优化模式选择; 第二,使用从第一速率失真模式选择收集的当前宏块的信息来计算用于速率控制的最终量化参数,并且如果最终量化参数与预测的量化参数不同,则将执行第二速率失真模式选择 再次。 基于速率失真优化的速率控制实现包括以下模块:视频编码编码器模块(例如,H.264 / JVT处理模块),基于速率失真优化的宏块模式选择和自适应量化模块,虚拟缓冲器和全局复杂度估计模块 。 由于在本发明中一起考虑了RDO和速率控制,所以基于RDO的速率控制方案可以在精确的目标比特率控制的情况下实现更好的编码性能。
    • 96. 发明授权
    • Pushback methods and apparatus for use in communicating messages to mobile communication devices
    • 用于向移动通信设备传送消息的回传方法和装置
    • US07715825B2
    • 2010-05-11
    • US11238069
    • 2005-09-28
    • Allan David LewisJames GodfreyWen GaoTabitha Kari FergusonIan Patterson
    • Allan David LewisJames GodfreyWen GaoTabitha Kari FergusonIan Patterson
    • H04M1/725
    • H04W4/12
    • One method involves the steps of causing a message to be sent to a relay network for delivery to a mobile device through one of a plurality of wireless networks coupled to the relay network; receiving, from the relay network, a result message when the mobile device is unavailable to receive the message, the result message comprising a message identifier; maintaining storage of the message in memory accessible by a host server after the result message is received; receiving, from the relay network, a status message which indicates that the mobile device is available to receive the message when the mobile device is available to receive the message; and causing the message to be sent again to the relay network for delivery to the mobile device in response to receiving the status message. During the unavailability, the relay network refrains from maintaining storage of the message.
    • 一种方法包括以下步骤:将消息发送到中继网络以通过耦合到中继网络的多个无线网络中的一个传送到移动设备; 当所述移动设备不可用于接收所述消息时,从所述中继网络接收结果消息,所述结果消息包括消息标识符; 在接收到结果消息之后,保持主机服务器可访问的内存中的消息的存储; 从所述中继网络接收指示当所述移动设备可用于接收所述消息时所述移动设备可用于接收所述消息的状态消息; 以及响应于接收到所述状态消息而使所述消息再次发送到所述中继网络以递送到所述移动设备。 在不可用期间,中继网络不会保留消息的存储。