| 摘要 |
PURPOSE:To receive continuously and surely the same broadcast content of a network broadcast station by a receiver during moving by allowing the 1st and 2nd tuners to receive the same broadcast content in different broadcast stations respectively and comparing and processing both the reception levels. CONSTITUTION:A radio wave of the 1st broadcast station from an antenna 7 is received by the 1st tuner 8 in an automobile use radio receiver and the voice output is power-amplified 10 and outputted to a speaker 11. The envelope of the sound signal is detected 12 at the same time, subject to A/D conversion 13 and inputted to a CPU16. The 2nd turner 9 searches the 2nd broadcast station being a network station of the 1st broadcast station, the envelope of the sound signal is detected 14, subject to A/D conversion 15 and inputted to the CPU16. The CPU16 compares the levels from the A/D converters 13, 15 for a prescribed period and when the difference is a prescribed value or below, it is discriminated as the same broadcast content and the reception electric field strength of the tuners 8, 9 is compared. When the electric field strength of the tuner 8 is below that of the tuner 9, the tuner 8 is switched to the 2nd broadcast station by the operation of the channel selection switch 17. |
