| CPC H04N 19/154 (2014.11) [H04N 19/115 (2014.11)] | 5 Claims |
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1. An encoding parameter deriving apparatus comprising:
a processor; and
a memory storing program instructions that cause the processor to:
calculate a value of an index indicating a quality of experience of a viewer for each of a plurality of encoded videos generated by encoding an original video by a plurality of combinations of values of encoding parameters, and derive a relationship between the values of the encoding parameters and the values of the index; and
derive a plurality of possibilities for a combination of values of the encoding parameters to be used for encoding the original video, based on the relationship, wherein the program instructions further cause the processor to
convert time-series data of throughput in a past delivery related to the original video into time-series data of values of the index;
derive values of the index each corresponding to one of the plurality of possibilities based on the time-series data of the values of the index, and
derive the plurality of possibilities based on the derived values of the index and the relationship,
wherein the program instructions further cause the processor to:
convert time-series data of throughput in the past delivery related to the original video into the time-series data of values of the index by substituting bit rate value at each time point of the time-series data of the bit rate that is obtained for each past delivery, for by of expression (1) to calculate a QoE corresponding to the bit rate value, and arranging the obtained QoE at each time point in time series
Q=c1/1+e−c2×log10 bv+c3 (1)
wherein c1, c2, and c3 are constants, and by is the bit rate.
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