TELOP DETECTING METHOD, TELOP DETECTING PROGRAM, AND TELOP DETECTING DEVICE

摘要

A telop detecting device (800) includes an MPEG input source (801), a parameter acquiring unit (802), a switch (803), a DCT coefficient evaluating unit (804) and a result output unit (805). The MPEG input source (801) is a media for acquiring an MPEG stream. The parameter acquiring unit (802) acquires parameters necessary for a telop detection from the MPEG input source (801). The switch (803) turns ON/OFF the connection with the DCT coefficient evaluating unit (804). The DCT coefficient evaluating unit (804) evaluates the likelihood of telop from the DCT coefficients of individual macro blocks in a frame, which are acquired through the switch (803), and decides and outputs a telop area. Specifically, the DCT coefficients of the individual macro blocks are weighted with a weighting matrix (W) to calculate an evaluation value (v).