Encoding method, decoding method and transmission method

Abstract

The encoding device includes: a circuit; and a memory connected to the circuit. During operation, the circuit: derives a reference movement vector for predicting the target block; derives a first movement vector different from the reference movement vector; derives a differential movement vector based on the difference between the reference movement vector and the first movement vector; and determines whether the differential movement vector is greater than a threshold. If the differential movement vector is greater than the threshold, the first movement vector is modified; if the differential movement vector is not greater than the threshold, the first movement vector is not modified, and the target block is encoded using either the modified or unchanged first movement vector.

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