Channel scan device and method, and program

摘要

The present technique relates to a channel scan device and method, and a program configured so that high-speed channel scan is enabled.;The power spectrum extracting unit 31 of the decoding unit 22 extracts a power level for each frequency of an input signal as a power spectrum, and supplies the power level to the channel scan processing unit 23. The channel scan processing unit 23 extracts a trapezoidal band, which constitutes a power spectrum waveform, in a power spectrum as a channel candidate, and extracts a channel, for which synchronization of a clock and synchronization of a TS required for reproduction of audio and video can be confirmed, as a valid channel. The present technique can be applied to a television receiver.

主权项

1. A channel scan device comprising:
a power spectrum extracting unit that extracts a power level for each frequency of an input signal as a power spectrum; a first channel candidate extracting unit that estimates that a trapezoidal range of a waveform, which constitutes the power spectrum, is a channel candidate and extracting the range; and a second channel candidate extracting unit that extracts a channel candidate having a symbol rate lower than a predetermined symbol rate from a band excluding a band, from which a channel candidate having a symbol rate higher than the predetermined symbol rate has been extracted by the first channel candidate extracting unit.