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    • 4. 发明申请
    • METHOD AND APPARATUS FOR ESTIMATING WIRELESS CHANNEL STATUS USING ADDITIONAL INFORMATION, AND METHOD FOR ADJUSTING CODING RATE IN WIRELESS NETWORK USING METHOD AND APPARATUS
    • 使用附加信息估计无线信道状态的方法和设备以及使用方法和设备在无线网络中调整编码速率的方法
    • WO2012125008A3
    • 2012-12-27
    • PCT/KR2012001935
    • 2012-03-16
    • KOREA ELECTRONICS TELECOMMCHO YONG JUCHA JI HUN
    • CHO YONG JUCHA JI HUN
    • H04N7/24H04N7/26H04N21/647
    • H04N21/44209H04N19/102H04N19/166H04N19/89H04N21/2383H04N21/2662H04N21/6547H04N21/6582
    • The invention relates to a method for estimating a wireless channel status in a wireless network, which is to be performed by a client device connected to a server for transmitting a video packet stream through a wired / wireless network, comprising: a step of estimating a bit error rate using additional information on a received video packet; and a step of estimating the channel capacity of the wireless network using the estimated bit error rate. The additional information includes wireless network information on the wireless network connected to the client device, information on a modulation system, and information on signal strength. The server receives, from the client device, feedback on the estimated channel capacity information or channel condition information of the wireless network, and adjusts the optimal video coding rate or the optimal source coding rate in a wireless network. Accordingly, the deterioration in the video quality of the video stream being received in the client device in real-time may be prevented to thereby improve the quality of service (QoS) of the video being received through a wireless network.
    • 本发明涉及一种用于估计无线网络中的无线信道状态的方法,该无线信道状态将由连接到服务器的用于通过有线/无线网络传输视频分组流的客户端设备执行,该方法包括:估计 使用关于接收到的视频分组的附加信息的误码率; 以及使用估计的误比特率来估计无线网络的信道容量的步骤。 附加信息包括连接到客户端设备的无线网络上的无线网络信息,关于调制系统的信息以及关于信号强度的信息。 服务器从客户端接收对估计的无线网络的信道容量信息或信道条件信息的反馈,并调整无线网络中的最优视频编码率或最优源编码率。 因此,可以防止在客户端设备中实时接收的视频流的视频质量的恶化,从而改善通过无线网络接收的视频的服务质量(QoS)。