Sony Group Corporation
IMAGE ENCODING DEVICE AND METHOD, AND IMAGE DECODING DEVICE AND METHOD

Abstract:

An image encoding device and a method, and an image decoding device and a method that are designed to improve encoding efficiency in IntraBC. A screen is divided into four slices (Slices # 0 through # 3). In a case where reference to a different slice is prohibited, the range that can be referred to from the current CTU in Slice # 2 is only the decoded portion in Slice # 2, and therefore, any block in Slice # 1 cannot be referred to, for example. In the case of the present technology, on the other hand, decoded different slices (Slice # 0 and Slice # 1)are included in the referable range, and accordingly, a block in Slice # 1 can be referred to from the current CTU in Slice # 2.