Image decoding apparatus, image coding apparatus, image decoding circuit, and image decoding method

An image processing apparatus which decodes a coded stream, the image processing apparatus comprising an integrated circuit including:

• a decoding circuit which decodes, from the coded stream, identification information identifying each of a plurality of orthogonal transform bases for use in inverse orthogonal transform of the coded stream, the orthogonal transform bases being stored in a first memory;
• a second memory for storing at least one orthogonal transform basis which is required for current inverse orthogonal transform of a current block, out of the orthogonal transform bases stored in the first memory and for use in the inverse orthogonal transform of the coded stream;
• an inverse orthogonal transform circuit which performs the current inverse orthogonal transform using the at least one orthogonal transform basis stored in the second memory and identified based on the identification information;
• and
• a transfer control circuit which transfers, from the first memory to the second memory, the at least one orthogonal transform basis identified based on the identification information.

An integrated circuit used for an image processing apparatus which generates a coded stream, the integrated circuit comprising:

• a coding circuit which generates a coded stream including identification information identifying each of a plurality of orthogonal transform bases for use in inverse orthogonal transform of the coded stream, the orthogonal transform bases being stored in a first memory;
• a second memory for storing at least one orthogonal transform basis which is required for current inverse orthogonal transform of a current block, out of the orthogonal transform bases stored in the first memory and for use in the inverse orthogonal transform of the coded stream;
• an inverse orthogonal transform circuit which performs the current inverse orthogonal transform using the at least one orthogonal transform basis stored in the second memory and identified based on the identification information;
• and
• a transfer control circuit which transfers, from the first memory to the second memory, the at least one orthogonal transform basis identified based on the identification information.

An image processing apparatus which generates a coded stream, the image processing apparatus comprising an integrated circuit including:

• a coding circuit which generates a coded stream including identification information identifying each of a plurality of orthogonal transform bases for use in inverse orthogonal transform of the coded stream, the orthogonal transform bases being stored in a first memory;
• a second memory for storing at least one orthogonal transform basis which is required for current inverse orthogonal transform of a current block, out of the orthogonal transform bases stored in the first memory and for use in the inverse orthogonal transform of the coded stream;
• an inverse orthogonal transform circuit which performs the current inverse orthogonal transform using the at least one orthogonal transform basis stored in the second memory and identified based on the identification information;
• and
• a transfer control circuit which transfers, from the first memory to the second memory, the at least one orthogonal transform basis identified based on the identification information.