Patent ID: 8194729

Claim:
An apparatus for matching compressed video data in a wireless fading environment, the apparatus comprising: an encoder for encoding and outputting the video data as a compressed bit stream; a channel error measurement unit for measuring Signal-to-Noise Ratio (SNR) or Carrier-to-Noise Ratio (CNR) of a wireless channel; an encoder optimization module including a channel fading measurement unit for receiving the SNR or CNR, calculating a bit error ratio (BER) or a frame error ratio (FER), determining that a current fading is slow fading if a variation of the BER or FER per unit time is smaller than a preset threshold and is fast fading if a variation of the BER or FER per unit time is larger than a preset threshold, a buffer controller for outputting a buffer control signal in order to adjust a size of a data output buffer of the wireless channel and, an encoder optimization controller for outputting a control signal to reduce a frame transmission ratio or to change the quality of the video data if the channel fading measurement unit determines that the current fading is slow fading, and for outputting another control signal to the buffer controller to adjust the size of the data output buffer of the wireless channel if the channel fading measurement unit determines that the current fading is fast fading; and a temporal Scalable Video Coding (SVC) selector and an SNR SVC selector for selecting the frame transmission ratio or the bit rate according to the control signal output from the encoder optimization module, to provide a frame selection signal or a bit rate selection signal to the encoder.