US Patent 10123022 Picture encoding device, picture decoding device, and picture communication system

In a picture encoding device and a picture decoding device, the access to a reference frame memory is suppressed. The picture encoding device is comprised of a first encoder for intra picture encoding, a second encoder for inter picture encoding, and an intermediate buffer. A local decoded picture generated by the first encoder is stored as a reference picture in the intermediate buffer, and the inter picture encoding by the second encoder is performed by referring to the local decoded picture in the intermediate buffer. A picture decoding device is comprised of a first decoder for intra picture decoding, a second decoder for inter picture decoding, and an intermediate buffer. A local decoded picture generated by the first decoder is stored as a reference picture in the intermediate buffer, and the inter picture decoding by the second decoder is performed by referring the local decoded picture in the intermediate buffer.