DELAY TIME MEASUREMENT METHOD, DELAY TIME MEASUREMENT SYSTEM, TIME INFORMATION SETTING APPARATUS, AND DELAY TIME MEASUREMENT APPARATUS

摘要

PPROBLEM TO BE SOLVED: To provide a delay time measurement method, a delay time measurement system, a time information setting apparatus, and a delay time measurement apparatus capable of measuring a transmission delay time by using only a single signal and measuring a delay time including a delay caused in a transmission path and a delay in an OFDM modulator-demodulator. PSOLUTION: External reference time information is set to an attached information transmission packet in a multiplex frame of a broadcast TS signal, the broadcast TS signal is transmitted, OFDM demodulation is applied to the broadcast TS signal subjected to OFDM modulation for broadcasting to demultiplex the multiplexed frame and to extract the time information of the attached information transmission packet, and a time difference between the extracted time information having been set and the external reference time information is obtained to measure a delay time. PCOPYRIGHT: (C)2005,JPO&NCIPI