Video coding device, video coding method, and video coding program

A video coding method comprising:

• orthogonally transforming an image block to calculate an orthogonal transform coefficient;
• quantizing the orthogonal transform coefficient to calculate a coefficient level;
• and
• entropy-encoding location information on all significant coefficient levels among the coefficient levels, and then entropy-encoding value information on each of the significant coefficient levels to output a bitstream,
• wherein upon calculating the coefficient level, the method comprises
• calculating the number of bits of location information determined based on a location of a coefficient level to be significant first in order of transmission and included in the image block,
• calculating the number of value information bits of a coefficient level to be significant, and
• setting a coefficient level to be significant in which the number of location information bits and the number of value information bits meet a predetermined condition to 0.

A non-transitory computer readable information recording medium storing a video coding program when executed by a processor, performs:

• orthogonally transforming an image block to calculate an orthogonal transform coefficient;
• quantizing the orthogonal transform coefficient to calculate a coefficient level;
• and
• entropy-encoding location information on all significant coefficient levels among the coefficient levels, and then entropy-encoding value information on each of the significant coefficient levels to output a bitstream,
• when calculating the coefficient level,
• calculating the number of bits of location information determined based on a location of a coefficient level to be significant first in order of transmission and included in the image block,
• calculating the number of value information bits of a coefficient level to be significant, and
• setting a coefficient level to be significant in which the number of location information bits and the number of value information bits meet a predetermined condition to 0.