Coding device, decoding device, coding method and decoding method

• Main Authors: NAKAJO KEN, TANISAWA AKIYUKI
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention discloses a coding device, a decoding device, a coding method and a decoding method. According to one embodiment, the coding method comprises an index setting step, a predicting step and a coding step, wherein in the index setting step, an index representing a reference image and a weighting factor of information is set; prediction is performed in the predicting step, so that the pixel value change between at least one reference image and a to-be-coded target image is a specific reference value or smaller on the basis of a reference value of the weighting factor, and the change value is exported as a predicting value; in the coding step, the difference between the weighting factor and the predicting value is coded. 本发明公开了编码设备、解码设备、编码方法和解码方法。根据个实施例的编码方法包括索引设置步骤，预测步骤，以及编码步骤。索引设定步骤设定的索引表示的参考图像和信息的加权因子。预测步骤预测，以使加权因子的基准值时，所述至少个参考图像与待编码的目标图像之间的像素值的变化是个具体的参考或更少，导出作为预测值。所述编码步骤编码该加权因子和预测值之间的差值。