Nippon Telegraph and Telephone Corporation

Sorami Nakamura

Hiroshi Yamamoto

Daisuke Ikegami

Hirotada Honda

A user experienced quality estimation apparatus estimating a user experienced waiting time of an application in an user terminal, includes: a computer configured to: obtain, as estimation target logs, a duration time of each process of data obtaining, script execution and screen rendering performed in an estimation target period in the user terminal, and to store the estimation target logs in a received log storage unit; read out the estimation target logs from the received log storage unit, and output logs, excluding logs having data duration time shorter than a predetermined short time process threshold or longer than a predetermined long time process threshold; calculate, as multiplicity, the number of processes in a timeslot of a constant time length for the output logs; and extract a continuous region from data quantized by the quantization unit.

User experienced quality estimation apparatus, terminal bottleneck determination apparatus, similar operation extraction apparatus, method and program

A content playback information estimation apparatus, for estimating a state on playback of content, that is provided between a distribution server and a terminal in a system in which the distribution server distributes the content to the terminal via a network and the terminal plays the content, the content playback information estimation apparatus including: a unit configured to obtain packet data distributed from the distribution server to the terminal and to store the packet data in a storage unit; a unit configured to estimate a data amount in a buffer of the terminal based on obtained packet data; and a unit configured to estimate a state on playback at each time of the content in the terminal by comparing the estimated data amount with a predetermined threshold.

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Musashino, Japan

Sorami Nakamura