CPC H04N 19/573 (2014.11) [H04N 19/159 (2014.11); H04N 19/31 (2014.11); H04N 19/593 (2014.11); H04N 19/65 (2014.11); H04N 19/70 (2014.11); H04N 19/172 (2014.11); H04N 19/184 (2014.11); H04N 19/61 (2014.11)] | 2 Claims |
1. A decoding method comprising:
judging whether or not a picture is a key picture having a temporal level that is lower than a temporal level of a current picture;
constructing a reference picture list including a valid reference picture for the current picture; and
decoding the current picture using the valid reference picture included in the reference picture list,
wherein when the current picture is a first picture of a switched temporal level higher than a temporal level of the key picture, all of reference pictures included in a reference picture memory are key pictures.
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