Patent ID: 8369408

Claim:
A method of fast mode decision of an enhancement layer using a bitrate-distortion cost in an SVC (Scalable Video Coding) encoder, comprising: a first step of calculating a bitrate-distortion cost for a current macro block and a bitrate-distortion cost for a previous macro-block of the current macro block of the enhancement layer based on an optimal motion mode and a motion vector for a macro block of a base layer of a current frame; a second step of correcting the bitrate-distortion cost for the previous macro block calculated at the first step by a correction value for reflecting the relationship with the previous frame to calculate a final bitrate-distortion cost for the previous macro block; and a third step of comparing the bitrate-distortion cost for the current macro block calculated at the first step with the final bitrate-distortion cost calculated at the second step and selecting motion modes that will be removed from the current macro block according to the comparison result.