Method and apparatus for estimating wireless channel status using additional information, and method for adjusting coding rate in wireless network using method and apparatus

A client apparatus, connected to a server that transmits video packet stream through a wired or wireless network, for estimate a wireless channel condition in a wireless network, the client apparatus comprising:

• a channel estimator configured to estimate a bit error rate (BER) using side information on received video packet and configured to estimate channel capacity of the wireless network using the estimated BER;
• and
• a decoding unit configured to set a channel coding rate based on the estimated channel capacity to perform channel-coding on the video packets received through the wireless network and decode the video on which the channel-coding is performed,
• wherein the side information includes signal strength information, modulation scheme information and wireless network information on the wireless network connected to the client apparatus.

A coding rate controlling method in a wireless network, the method being performed in a server, connected to a client apparatus through a wired or wireless network, to transmit video packet stream, the method comprising:

• receiving estimated channel capacity fed-back from the client apparatus to predict channel capacity using the fed-back estimated channel capacity;
• and
• controlling a video coding rate and a channel coding rate based on the predicted channel capacity,
• wherein the estimated channel capacity is estimated using side information including signal strength information, modulation scheme information and wireless network information on the wireless network connected to the client apparatus.