| 摘要 |
PURPOSE: A vehicle radio receiver having an auto-scan capability is provided to enable a user to listen to the same station even when the corresponding frequency is changed by automatically scanning the station. CONSTITUTION: A vehicle radio receiver having an auto-scan capability includes a watermarking decoder(70), an automatic frequency detector(80), and a microcomputer(90). The decoder detects watermarking information embedded in a broadcasting signal tuned at a tuner(20). The automatic frequency detector stores the watermarking information at a memory and decreases power of the broadcasting signal when the watermarking information tuned by a random scanning does not coincide with pre-stored watermarking information. The microcomputer controls the tuner to perform the random scanning when the output power of the inputted broadcasting signal is lower than a predetermined reference value. The tuner is controlled to fix the channel when the output power of the inputted broadcasting signal is higher than the reference value.
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