ENCODER, DECODER, ENCODING METHOD, AND DECODING METHOD

    公开(公告)号:CA3070678A1

    公开(公告)日:2019-01-31

    申请号:CA3070678

    申请日:2018-07-25

    Inventor: KANOH RYUICHI

    Abstract: An encoding device (100) encodes a block, of an image, to be encoded and comprises: a conversion unit (106) that performs a primary conversion by which the residual of the block to be encoded is converted to a primary factor, determines whether to apply a secondary conversion to the block to be encoded, and if a secondary conversion is to be applied, performs a secondary conversion from the primary factor to a secondary factor; a quantization unit (108) that, if a secondary conversion is not applied, calculates a quantized primary factor by performing a first quantization on the primary factor, and if a secondary conversion is applied, calculates a quantized secondary factor by performing a second quantization, which is different from the first quantization, on the secondary factor; and an entropy encoding unit (110) that generates an encoded bitstream by encoding the quantized primary factor or the quantized secondary factor.

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