ADAPTIVE SECONDARY PREDICTION-BASED IMAGE ENCODING/DECODING METHOD, DEVICE AND RECORDING MEDIUM

摘要

One embodiment of the present invention comprises the step of selectively carrying out frequency conversion on a first residual block generated by subtracting a prediction block from the current block, generating a first quantization block for the first residual block or the first residual block after the frequency conversion, generating a second quantization block by selectively carrying out a second prediction by using a second prediction movement vector set for the quantized first residual block when the first quantization block is a block resulting from the quantization of the first residual block, encoding data about whether or not frequency conversion has taken place and, optionally, the second prediction information, and using a bitstream to encode the first quantization block or second quantization block, and decoding the same.