Image encoding/decoding device and method

A video decoding method, comprising:

• decoding, from a bitstream, a skip information indicating whether or not a current block to be decoded is a skip block;
• when the skip information indicates that the current block is the skip block,
• decoding motion information of the current block from the bitstream, and thereby determining a motion vector of the current block, and
• reconstructing the current block directly from a predicted block predicted using the motion vector of the current block, without decoding information on residual signals of the current block;
• and
• when the skip information indicates that the current block is not the skip block,
• decoding prediction information of the current block from the bitstream,
• decoding, from the bitstream, information on a quantization parameter and transform coefficients which correspond to the current block, when at least one of the transform coefficients is not zero,
• reconstructing residual signals from the transform coefficients, by using the information on the quantization parameter, and
• reconstructing the current block based on the prediction information and the reconstructed residual signals.