Patent ID: 6864926

Claim:
A channel tuning apparatus, comprising: a tuner for tuning to any of channels that broadcast digital signals in multiple system modes and receiving the digital signals; input means for selecting a specific channel for said tuner to tune to; demodulation means for amplifying, detecting, demodulating, and converting the received signals coming from said tuner; detection means for detecting receive data in the output signals of said demodulation means to determine the system mode and frequency mode of the channel tuned by said tuner; and memory means for storing mode data detected by said detection means, based on the channel selection by said input means, wherein the channel tuning apparatus is configured to, before performing automatic channel tuning with respect to said broadcast, make said tuner tune to said specific channel determined by said input means, make said detection means detect the system mode of said specific channel and a shift in the received frequency on said specific channel, and store them in said memory means, and the channel tuning apparatus is configured to, when digital signals are received by said tuner in said automatic channel tuning, use the stored data as initial data for said automatic channel tuning to tune to and pull in said digital signals.